装甲车辆端联器淬火软点原因分析  

Causal Analysis on Quenching Soft Spot of Forging Track Connector for Armored Vehicles

作　　者：李永梅[1] 王思涛[1] 邬晓颖 陈利华[1] 王亮[1] 徐胜良[2] 

机构地区：[1]北京北方车辆集团有限公司,北京100072 [2]中国人民解放军驻618厂军代室,北京100072

出　　处：《新技术新工艺》2017年第8期77-79,共3页New Technology & New Process

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, metallographie microscope and scanning electron microscopy. The conclusion is that the C element non- uniform 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.

关 键 词：端联器 淬火软点 带状组织 

分 类 号：TG156.3[金属学及工艺—热处理]