不锈钢拉杆断裂失效分析OA
Failure analysis on fracture of stainless steel tie rod
某试制车型的不锈钢拉杆,在装配完成静置24h后发生了断裂失效,断裂位置在不锈钢拉杆的焊接接头处.通过宏观观察、扫描电镜分析、化学成分分析、金相与硬度检测等方法对不锈钢拉杆的失效原因进行了分析.结果表明:不锈钢拉杆的失效模式为氢脆断裂,拉杆材料中碳含量过高、焊接过程中在焊缝与热影响区出现马氏体组织,是导致氢脆断裂的根本原因.
The stainless-steel tie rod of a trial-produced vehicle model fractured after being left stationary for 24 hours after assembly.The fracture occurred at the welded joint of the stainless-steel tie rod.The failure causes of the stainless-steel tie rod were analyzed through methods such as macroscopic observation,scanning electron microscopy analysis,chemical composition analysis,metallographic and hardness testing.The results show that the failure mode of the…查看全部>>
孙润祥
北京福田戴姆勒汽车有限公司 北京 101400
奥氏体不锈钢氢脆马氏体焊接
austenitic stainless steelhydrogen embrittlementmartensitewelding
《金属加工（热加工）》 2025 (3)
147-150,4
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