GM
WORLDWIDE
ENGINEERING    Material Specification
STANDARDS        材料规范
          全球工程标准
GMW16579
Material and Process Testing Requirements for
Press Hardened Steel and Stamping Suppliers
热成形钢和热冲压零件供应商的材料和工艺要求
1 Scope
1 范围
This document describes the minimum process and internal testing requirements for producers of hot stamped parts.
此文件描述热成形零件供应商的最低工艺和内部试验要求。
1.1 Material Description. Hot stamping, or press hardening as it is also known, utilizes a steel of high hardenability such as 22MnB5 that is heated to convert the microstructure to austenite followed by stamping in a water cooled die to produce the proper part shape and to simultaneously quench the steel to create a martensite rich microstructure. Parts produced to this specification will have a uniform hardness and a microstructure consisting of essentially 100% tempered martensite along with small amounts of bainite.
1.1 材料描述。热成形，也称为压力硬化，即把具有良好淬硬性的热成形钢如22MnB5等加热使之奥氏体化，然后利用带有冷却系统的模具来冲压成形，使零件在获得所需形状的同时淬火，得到马氏体组织。按照本规范制造的零件具有统一的硬度，并应具有100%的回火马氏体，并伴有极少量的贝氏体组织。
1.2 Symbols. Not applicable.
1.2 标号。不适用。
1.3 Typical Applications. Typical parts covered by this specification are those that require
extremely high strength and are generally critical to passenger safety, side impact and provide passenger protection in the case of vehicle roll over. These parts are found throughout the body structure and closures, with typical applications including door beams, B Pillar reinforcements, floor reinforcements and upper body roof rails.
1.3 典型应用。本规范所涉及的零件为具有极高强度要求的零件，一般为保护乘员安全、防侧撞以及在车辆侧翻时保护乘客的关键零件。这些零件广泛应用于白车身结构件和覆盖件，典型的应用包括车门防撞梁、B柱加强件、地板加强件和车顶横梁。
2 References
2 参考
Note: Only the latest approved standards are applicable unless otherwise specified.
注：无特殊情况只可使用最新的标准
2.1 External Standards/Specifications.
2.1 外部标准profile是什么意思中文翻译/规范
AIAG CQI-9  ASTM E140
ASTME-8
2.2 GM Standards/Specifications.
2.2 GM标准/规范
GMW3059 GMW14400 GMW3335
2.3 Additional References.
2.3 补充参考
● Best Practice BODYSTR-33.The supplier shall work with the GM responsible engineer to comprehend this requirement.
供应商应和通用的责任工程师一起制定BODYSTR-33最合适的试样要求。
● Statement of Requirements (SOR) Appendix N.
附录N要求声明（简称SOR）
●TMC003 Material Safety Data Sheet guidance documents (available supplypower).
TMC003材料安全数据表格指导文件。
（参考链接）
3 Requirements
3 要求
3.1 Requirements on Test Specimens. Not applicable.
3.1 测试样件要求。不适用。
3.2 Marking. All parts shall be marked as shown in the SOR Appendix N and the Best Prac
tice BODYSTR-33.
3.2 标记。所有零件必须按SOR中附件N和the Best Practice BODYSTR-33标记。
3.3 General Requirements. All sheet parts produced to this specification shall be manufactured by approved suppliers to GM and will be shown as being approved to GMW14400. Approved suppliers are listed in the MATSPC system and can be provided by your GM Global Purchasing Supply Chain buyer. A change in steel suppliers is considered a significant process change and the stamping supplier will be required to update their Production Part Approval Process (PPAP) status before production begins.
3.3 一般要求。执行此规范的零件应由GM认可的通过GMW14400认证的供应商生产。被认可的供应商将会显示在MATSPC系统中，并且被纳入GM全球采购供应链。如果更换材料供应商，将被视作明显的过程变更，零件供应商在生产前，必须更新自己的PPAP状态。
3.3.1 GM must be notified prior to any steel supplier change. If a zinc based coating is specified (pure zinc or a zinc alloy) the source that produces the stamping is required to test and re-qualify to a PPAP level3.
The stamping supplier will consult with Product Engineering and Materials Engineering when evaluating potential process and supplier changes.
3.3.1 零件供应商在更换原材料供应商时必须提前通知GM。如果要使用镀锌板（纯锌或锌合金），零件供应商需要进行测试并重新进行3级PPAP认证。
在评估潜在的工艺和供应商变更时，零件供应商需要与GM的产品工程和材料工程部门进行协商。
3.3.2 Suppliers of hot stamped parts to GM are required to verify that incoming steels meet all specified material requirements. This shall include, but not be limited to: steel thickness, mechanical properties after heat treatment, coating weight and coating type (for coated products), bend test (parallel and transverse to rolling direction) and any other requirements determined by GM and/or the released part drawing/math data. The supplier is responsible to ensure that the steel, the heat treatment and stamping process, die cooling, post form trimming, etc are capable of producing parts that meet all specified requirements.

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