摘要
针对某批装甲车辆端联器在热处理后出现了淬火软点现象,通过硬度检测、化学成分分析、金相观察及扫描电镜分析等检测手段,对装甲车辆端联器零件在热处理过程中出现的淬火软点问题和原因进行了具体分析,结果表明,端联器材料化学成分中碳元素分布不均匀是端联器淬火软点形成的关键因素;另外在端联器锻坯内部存在带状组织,二次淬火后的端联器组织以贝氏体和马氏体为主,其中马氏体多分布在带状组织上,马氏体相在组织中分布不均匀也是淬火软点存在的重要原因。
The hardness of some batch of track connector used for armored vehicles becomes slightly lower after heat treatment.Quenching soft spot cause of forging track connector is analyzed by using hardness measurement,chemical composition analysis,metallographic microscope and scanning electron microscopy.The conclusion is that the C element nonuniform distribution is the key factor of track connector quenching soft spot formation.The banded structure exists in the forging track connector and the bainite and martensite mostly appear after second quenching.The martensite phase is distributed in banded structure and the uneven distribution is an important cause of the soft spot.
引文
[1]樊东篱.热处理技术数据手册[M].北京:机械工业出版社,2000.
[2]崔中圻.金属学与热处理[M].北京:机械工业出版社,2007.
[3]黄春峰.钢的热处理工艺设计经验公式[J].航空制造技术,2000(4):53-55.
[4]魏振宇.板条马氏体的形态和内部显微组织[J].钢铁,1982(8):71-78.