2023-3-22 3.238.253.163
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Position: Chinese Standard in English/GB/T 41857-2022
GB/T 41857-2022   Sheet metal parts fabricated by fine blanking combined with extrusion process—General specification (English Version)
Standard No.: GB/T 41857-2022 Status:valid remind me the status change

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Standard No.: GB/T 41857-2022
English Name: Sheet metal parts fabricated by fine blanking combined with extrusion process—General specification
Chinese Name: 金属板料精冲挤压复合成形件 通用技术条件
Chinese Classification: J32    Forging and pressing
Professional Classification: GB    National Standard
Issued on: 2022-10-12
Status: valid
Language: English
File Format: PDF
Word Count: 4000 words
Price(USD): 120.0
Delivery: via email in 1~3 business day
1 Scope This document specifies the technical requirements, test methods, inspection rules, marking, packaging, transport and storage of metal sheets with strong crimping and extrusion compound forming (hereinafter referred to as "fine blanking and extrusion"). This document applies to the steel fine blanking extrusion parts produced by the strong crimping fine blanking and extrusion compound forming method. 2 Normative reference documents The contents of the following documents constitute the essential provisions of this document through the normative references in the text. Among them, note the date of the reference documents, only the date of the corresponding version applicable to this document; not note the date of the reference documents, the latest version (including all the revision of the list) applicable to this document. GB/T 223 (all parts) Methods of chemical analysis of iron and steel and alloys GB/T 224 Determination of the depth of decarburisation of steel GB/T 226 Method for the acid etching of steel for low-frequency organisation and defects GB/T 228.1 Metallic Materials Tensile Testing Part 1: Test Method at Room Temperature GB/T 230.1 Metallic Materials Rockwell Hardness Test Part 1: Test Method GB/T 231.1 Metallic Materials Brinell Hardness Test Part 1: Test Method GB/T699 High Quality Carbon Structural Steel GB/T 1031 Geometrical Specifications for Crystallization (GPS) Surface Texture Profile Method Surface Roughness Parameters and Their Values GB/T1591 Low Alloy High Strength Structural Steel GB/T2828.1 Sampling Procedures for Inspection by Attributes Part 1: Sampling Plan for Lot by Lot Inspection Indexed by Acceptance Quality Limit (AQL) GB/T2829 Sampling Procedures and Tables for Periodic Inspection by Attributes (applicable to the inspection of process stability) GB/T 2975 Steel and Steel Products - Sampling Location and Sample Preparation for Mechanical Properties Test GB/T 3077 Alloy Structural Steel GB/T4335 Cold Rolled Low Carbon Steel Sheet Determination of Ferrite Grain Size GB/T4336 Carbon Steel and Medium Low Alloy Steel Determination of Multi element Content Spark Discharge Atomic Emission Spectrometry (Conventional Method) GB/T 5216 Structural Steel with Guaranteed Hardenability GB/T 6394 Determination of Average Grain Size of Metals GB/T 8541 Forging Terminology GB/T10561 Determination of the Content of Non metallic Inclusions in Steels -- Micrographic Examination by Standard Rating Chart GB/T13298 Test Method for Microstructure of Metals GB/T 13299 Evaluation Method for Microstructure of Steel GB/T 13320 Metallographic Structure Rating Chart and Evaluation Method for Steel Die Forgings GB/T 30573 General Technical Conditions for Precision Blanking Parts JB/T 5074-2007 Nodulite Rating of Low and Medium Carbon Steel JB/T 9175.2 Precision Blanking Parts Part 2: Quality JB/T 9180.1 Steel Cold Extruded Parts Part 1: Tolerances 3 Terms and definitions The terms defined in GB/T 8541 and the following terms and definitions apply to this document. 3.1 edge straightness The maximum distance between the concave side edges of a steel plate or strip and the line connecting the two end points of the length within the measured length. 4 Technical requirements 4.1 Raw materials 4.1.1 Chemical composition The chemical composition of the material should comply with the provisions of GB/T 699, GB/T 1591, GB/T 3077 or GB/T 5216. 4.1.2 Mechanical properties The mechanical properties of the material shall conform to the provisions of GB/T 699, GB/T 1591, GB/T 3077 or GB/T 5216, or be determined by mutual agreement between supply and demand. 4.1.3 Dimensions Material dimensional accuracy requirements include: a) thickness requirements; steel plate and strip thickness allowable deviation should be determined by the height tolerance of hot extrusion forming, thickness tolerance should not be greater than the height tolerance of extrusion forming 2/3; b) edge straightness requirements should be in line with the provisions of Table 1. 4.2 Fine blanking extrusions 4.2.1 Size The dimensional requirements for fine blanking extrusions include: a) fine punching size tolerance and shear surface roughness requirements should meet the requirements of GB/T 30573, extrusion tolerance should be consistent with JB/T9180.1 The provisions of b) fine blanking shear surface verticality tolerance and non-shear surface flatness tolerance should meet the requirements of GB/T 30573, extrusion shear surface verticality tolerance should be no greater than the fine blanking shear surface tolerance. The tolerance of the verticality of the extruded shear surface shall not be greater than the tolerance of the verticality of the fine blanking shear surface; c) when d/D>1 (d for extrusion die diameter, D for extrusion die diameter) for extrusion, extrusion shrinkage hole diameter I and depth size h shall meet the requirements of the demand side. 4.2.2 Appearance 5 Test methods 5.1 Chemical composition analysis, steel and its alloys should be in accordance with GB/T 223 (all parts) and GB/T 4336 provisions of the implementation. 5.2 The microstructure inspection and assessment of metals should be carried out according to the provisions of GB/T 4335, GB/T 6394, GB/T 13298, GB/T 13299, GB/T 13320, JB/T 5074-2007. 5.3 Metal internal defects inspection should be carried out in accordance with the provisions of GB/T 226, GB/T 10561. 5.4 Tensile test should be carried out according to the provisions of GB/T 228.1, GB/T 2975. 5.5 Hardness test should be carried out according to the provisions of GB/T 230.1, GB/T 231.1. 5.6 Decarburization layer test should be carried out in accordance with the provisions of GB/T 224. 5.7 Shear surface roughness test should be carried out in accordance with GB/T 1031, JB/T 9175.2. 5.8 fine punching extrusion of the shrinkage, tab filling and other defects can be determined using the contour meter. 5.9 The appearance of raw materials can be detected by visual inspection. Fine blanking extrusion cracks, tears, hair pulling and scar inspection can be measured by visual inspection, light reflection, machine vision identification or in accordance with the supply and demand for the common identification of the standard sample for comparison and other methods. 5.10 size, size tolerance, tolerance of shape, shear surface integrity level, shear surface allowable tear level and so on using general or special inspection tools or measuring instruments to determine. 6 Inspection rules 6.1 The supplier shall reinspect the material according to the items and frequency required by the demand side; if the demand side does not require, the inspection can be carried out according to the table as needed. 6.2 Fine blanking extrusions shall be inspected and accepted by the quality inspection department of the supplier according to the fine blanking extrusions diagram and technical documents. The product quality certificate shall be attached before leaving the factory. 6.3 The inspection of the fine blanking extrusion is divided into: a) general inspection: dimensional tolerances, shear surface integrity rate grade, shear surface allowable tear grade, shear surface verticality, collapse angle, burr, non-shear surface flatness and non-shear surface quality, etc.; b) Supplementary inspection: shear surface roughness and metallographic organization, etc. Fine blanking extrusions should be confirmed by the supply and demand consultation, such as the use of sampling, according to the provisions of GB/T 2828.1, GB/T 2829. 6.4 The inspection of finished fine blanking extrusions shall be carried out by the quality inspection department of the supplier according to the fine blanking extrusions diagram, the order contract, this document and the provisions of JB/T 9175.2. 6.5 Fine-blanking extrusion acceptance of finished products shall be accepted by the demand side according to the supplier's quality certificate, fine-blanking extrusion diagram, order contract, this document and JB/T 9175.2, according to the contract or according to GB/T 2828.1, GB/T 2829 for random inspection and acceptance. 6.6 Fine blanking extrusion inspection group, sampling and the determination of the test results should be confirmed by both the supply and demand sides in the order consultation. 6.7 After completing the inspection, the product inspection report should be given in time, mainly including dimensions, materials, appearance of the three aspects, the report should also have the name of the supplier and demander, part number, part name, user mark, supply status, order number and inspection date, etc. 7 signs, packaging, transport and storage 7.1 Fine-blanking extrusions are generally not marked, need to be marked in the fine-blanking extrusions should be indicated in the diagram. 7.2 Each batch of fine blanking extrusion should be shipped with a quality certificate. Its main content includes: a) the name of the supplier and demander; b) order contract number, fine blanking extrusion name and fine blanking extrusion part number c) the number of fine blanking extrusions; d) Material grade e) test results; f) Production batch number; g) seal of the quality inspection department, signature of the inspector and date. 7.3 The packaging, transport and storage requirements of the fine blanked extrusions shall be confirmed by mutual agreement between supply and demand and shall be stipulated in the order contract. Bibliography
1 Scope 2 Normative reference documents 3 Terms and definitions 4 Technical requirements 5 Test methods 6 Inspection rules 7 signs, packaging, transport and storage Bibliography
Referred in GB/T 41857-2022:
*GBT223-
*GB/T 224-2019 Determination of the depth of decarburization of steels
*GB/T 226-2015 Test method for macrostructure and defect of steel by etching
*GB/T 228.1-2021 Metallic materials—Tensile testing—Part 1: Method of test at room temperature
*GB/T 230.1-2018 Metallic materials—Rockwell hardness test—Part 1:Test method
*GB/T 231.1-2018 Metallic materials-Brinell hardness test-Part 1:Test method
*GB/T 699-2015 Quality carbon structural steels
*GB/T 1031-2009 Geometrical product specifications(GPS) - Surface texture: Profile method - Surface roughness parameters and their values
*GB/T 1591-2018 High strength low alloy structural steels
*GB/T 2828.1-2012 Sampling procedures for inspection by attributea-Part1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection
*GB/T 2829-2002 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
*GB/T 2975-2018 Steel and steel products—Location and preparation of samples and test pieces for mechanical testing
*GB/T 3077-2015 Alloy structure steels
*GB/T 4335-2013 Determination of Ferrite Grain Size for Cold Rolled Low Carbon Steel Sheets
*GB/T 4336-2016/XG1-2017 Carbon and low-alloy steel―Determination of multi-element contents―Spark discharge atomic emission spectrometric method (routine method), including Amendment 1
*GB/T 5216-2014 Structural steels with specified hardenability bands
*GB/T 6394-2017 Metal - Methods for estimating the average grain size
*GB/T 8541-2012 Terminology of forging and stamping
*GB/T 10561-2005 Steel - Determination of Content of Nonmetallic Inclusions - Micrographic Method Using Standards Diagrams
*GB/T 13298-2015 Inspection methods of microstructure for metals
*GB/T 13299-2022 Determination of free cementite, pearlite and Widmanstaten structure in steel
*GB/T 13320-2007 Metellographic grading atlas and assessing method for steel die forgings
*GB/T 30573-2014 Fine Blanked Parts - General Technical Requirements
*JB/T 5074-2007 Spheroidite grade of low and medium carbon steel
*JB/T 9175.2-2013 Fine blanked parts ─Part 2: Quality
*JB/T 9180.1-2014 Cold Extruded Steel Parts - Part 1: Dimensional Tolerance
Code of China
Standard
GB/T 41857-2022  Sheet metal parts fabricated by fine blanking combined with extrusion process—General specification (English Version)
Standard No.GB/T 41857-2022
Statusvalid
LanguageEnglish
File FormatPDF
Word Count4000 words
Price(USD)120.0
Implemented on
Deliveryvia email in 1~3 business day
Detail of GB/T 41857-2022
Standard No.
GB/T 41857-2022
English Name
Sheet metal parts fabricated by fine blanking combined with extrusion process—General specification
Chinese Name
金属板料精冲挤压复合成形件 通用技术条件
Chinese Classification
J32
Professional Classification
GB
ICS Classification
Issued by
Issued on
2022-10-12
Implemented on
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
Language
English
File Format
PDF
Word Count
4000 words
Price(USD)
120.0
Keywords
GB/T 41857-2022, GB 41857-2022, GBT 41857-2022, GB/T41857-2022, GB/T 41857, GB/T41857, GB41857-2022, GB 41857, GB41857, GBT41857-2022, GBT 41857, GBT41857
Introduction of GB/T 41857-2022
1 Scope This document specifies the technical requirements, test methods, inspection rules, marking, packaging, transport and storage of metal sheets with strong crimping and extrusion compound forming (hereinafter referred to as "fine blanking and extrusion"). This document applies to the steel fine blanking extrusion parts produced by the strong crimping fine blanking and extrusion compound forming method. 2 Normative reference documents The contents of the following documents constitute the essential provisions of this document through the normative references in the text. Among them, note the date of the reference documents, only the date of the corresponding version applicable to this document; not note the date of the reference documents, the latest version (including all the revision of the list) applicable to this document. GB/T 223 (all parts) Methods of chemical analysis of iron and steel and alloys GB/T 224 Determination of the depth of decarburisation of steel GB/T 226 Method for the acid etching of steel for low-frequency organisation and defects GB/T 228.1 Metallic Materials Tensile Testing Part 1: Test Method at Room Temperature GB/T 230.1 Metallic Materials Rockwell Hardness Test Part 1: Test Method GB/T 231.1 Metallic Materials Brinell Hardness Test Part 1: Test Method GB/T699 High Quality Carbon Structural Steel GB/T 1031 Geometrical Specifications for Crystallization (GPS) Surface Texture Profile Method Surface Roughness Parameters and Their Values GB/T1591 Low Alloy High Strength Structural Steel GB/T2828.1 Sampling Procedures for Inspection by Attributes Part 1: Sampling Plan for Lot by Lot Inspection Indexed by Acceptance Quality Limit (AQL) GB/T2829 Sampling Procedures and Tables for Periodic Inspection by Attributes (applicable to the inspection of process stability) GB/T 2975 Steel and Steel Products - Sampling Location and Sample Preparation for Mechanical Properties Test GB/T 3077 Alloy Structural Steel GB/T4335 Cold Rolled Low Carbon Steel Sheet Determination of Ferrite Grain Size GB/T4336 Carbon Steel and Medium Low Alloy Steel Determination of Multi element Content Spark Discharge Atomic Emission Spectrometry (Conventional Method) GB/T 5216 Structural Steel with Guaranteed Hardenability GB/T 6394 Determination of Average Grain Size of Metals GB/T 8541 Forging Terminology GB/T10561 Determination of the Content of Non metallic Inclusions in Steels -- Micrographic Examination by Standard Rating Chart GB/T13298 Test Method for Microstructure of Metals GB/T 13299 Evaluation Method for Microstructure of Steel GB/T 13320 Metallographic Structure Rating Chart and Evaluation Method for Steel Die Forgings GB/T 30573 General Technical Conditions for Precision Blanking Parts JB/T 5074-2007 Nodulite Rating of Low and Medium Carbon Steel JB/T 9175.2 Precision Blanking Parts Part 2: Quality JB/T 9180.1 Steel Cold Extruded Parts Part 1: Tolerances 3 Terms and definitions The terms defined in GB/T 8541 and the following terms and definitions apply to this document. 3.1 edge straightness The maximum distance between the concave side edges of a steel plate or strip and the line connecting the two end points of the length within the measured length. 4 Technical requirements 4.1 Raw materials 4.1.1 Chemical composition The chemical composition of the material should comply with the provisions of GB/T 699, GB/T 1591, GB/T 3077 or GB/T 5216. 4.1.2 Mechanical properties The mechanical properties of the material shall conform to the provisions of GB/T 699, GB/T 1591, GB/T 3077 or GB/T 5216, or be determined by mutual agreement between supply and demand. 4.1.3 Dimensions Material dimensional accuracy requirements include: a) thickness requirements; steel plate and strip thickness allowable deviation should be determined by the height tolerance of hot extrusion forming, thickness tolerance should not be greater than the height tolerance of extrusion forming 2/3; b) edge straightness requirements should be in line with the provisions of Table 1. 4.2 Fine blanking extrusions 4.2.1 Size The dimensional requirements for fine blanking extrusions include: a) fine punching size tolerance and shear surface roughness requirements should meet the requirements of GB/T 30573, extrusion tolerance should be consistent with JB/T9180.1 The provisions of b) fine blanking shear surface verticality tolerance and non-shear surface flatness tolerance should meet the requirements of GB/T 30573, extrusion shear surface verticality tolerance should be no greater than the fine blanking shear surface tolerance. The tolerance of the verticality of the extruded shear surface shall not be greater than the tolerance of the verticality of the fine blanking shear surface; c) when d/D>1 (d for extrusion die diameter, D for extrusion die diameter) for extrusion, extrusion shrinkage hole diameter I and depth size h shall meet the requirements of the demand side. 4.2.2 Appearance 5 Test methods 5.1 Chemical composition analysis, steel and its alloys should be in accordance with GB/T 223 (all parts) and GB/T 4336 provisions of the implementation. 5.2 The microstructure inspection and assessment of metals should be carried out according to the provisions of GB/T 4335, GB/T 6394, GB/T 13298, GB/T 13299, GB/T 13320, JB/T 5074-2007. 5.3 Metal internal defects inspection should be carried out in accordance with the provisions of GB/T 226, GB/T 10561. 5.4 Tensile test should be carried out according to the provisions of GB/T 228.1, GB/T 2975. 5.5 Hardness test should be carried out according to the provisions of GB/T 230.1, GB/T 231.1. 5.6 Decarburization layer test should be carried out in accordance with the provisions of GB/T 224. 5.7 Shear surface roughness test should be carried out in accordance with GB/T 1031, JB/T 9175.2. 5.8 fine punching extrusion of the shrinkage, tab filling and other defects can be determined using the contour meter. 5.9 The appearance of raw materials can be detected by visual inspection. Fine blanking extrusion cracks, tears, hair pulling and scar inspection can be measured by visual inspection, light reflection, machine vision identification or in accordance with the supply and demand for the common identification of the standard sample for comparison and other methods. 5.10 size, size tolerance, tolerance of shape, shear surface integrity level, shear surface allowable tear level and so on using general or special inspection tools or measuring instruments to determine. 6 Inspection rules 6.1 The supplier shall reinspect the material according to the items and frequency required by the demand side; if the demand side does not require, the inspection can be carried out according to the table as needed. 6.2 Fine blanking extrusions shall be inspected and accepted by the quality inspection department of the supplier according to the fine blanking extrusions diagram and technical documents. The product quality certificate shall be attached before leaving the factory. 6.3 The inspection of the fine blanking extrusion is divided into: a) general inspection: dimensional tolerances, shear surface integrity rate grade, shear surface allowable tear grade, shear surface verticality, collapse angle, burr, non-shear surface flatness and non-shear surface quality, etc.; b) Supplementary inspection: shear surface roughness and metallographic organization, etc. Fine blanking extrusions should be confirmed by the supply and demand consultation, such as the use of sampling, according to the provisions of GB/T 2828.1, GB/T 2829. 6.4 The inspection of finished fine blanking extrusions shall be carried out by the quality inspection department of the supplier according to the fine blanking extrusions diagram, the order contract, this document and the provisions of JB/T 9175.2. 6.5 Fine-blanking extrusion acceptance of finished products shall be accepted by the demand side according to the supplier's quality certificate, fine-blanking extrusion diagram, order contract, this document and JB/T 9175.2, according to the contract or according to GB/T 2828.1, GB/T 2829 for random inspection and acceptance. 6.6 Fine blanking extrusion inspection group, sampling and the determination of the test results should be confirmed by both the supply and demand sides in the order consultation. 6.7 After completing the inspection, the product inspection report should be given in time, mainly including dimensions, materials, appearance of the three aspects, the report should also have the name of the supplier and demander, part number, part name, user mark, supply status, order number and inspection date, etc. 7 signs, packaging, transport and storage 7.1 Fine-blanking extrusions are generally not marked, need to be marked in the fine-blanking extrusions should be indicated in the diagram. 7.2 Each batch of fine blanking extrusion should be shipped with a quality certificate. Its main content includes: a) the name of the supplier and demander; b) order contract number, fine blanking extrusion name and fine blanking extrusion part number c) the number of fine blanking extrusions; d) Material grade e) test results; f) Production batch number; g) seal of the quality inspection department, signature of the inspector and date. 7.3 The packaging, transport and storage requirements of the fine blanked extrusions shall be confirmed by mutual agreement between supply and demand and shall be stipulated in the order contract. Bibliography
Contents of GB/T 41857-2022
1 Scope 2 Normative reference documents 3 Terms and definitions 4 Technical requirements 5 Test methods 6 Inspection rules 7 signs, packaging, transport and storage Bibliography
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Keywords:
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