42CrMoA冲击式凿岩钎杆用钢淬火开裂缺陷分析与研究  

Analysis and Study on Crack Defect of Steel 42CrMoAQuenching for Percussive Rock Drill Rod

作　　者：崔政 王瑞 CUI Zheng;WANG Rui(Jianlong Beiman Special Steel Co.,Ltd.,Qiqihar,Heilongjiang,016000,P.R.China)

机构地区：[1]建龙北满特殊钢有限责任公司,黑龙江齐齐哈尔016000

出　　处：《南方金属》2024年第6期23-26,共4页Southern Metals

摘　　要：冲击式凿岩钎杆用钢因用于破碎岩体,故对材料的化学成分及热处理工艺有较严格的要求,在淬火时往往先进行650℃左右的正火以均匀其化学成分和组织,以满足对强塑积的要求。文章就某批42CrMoA冲击式凿岩钎杆用钢生产过程中淬火开裂问题进行分析,依据3种不同缺陷试样及正火后待淬火的正常钎杆试样进行宏观分析,以及化学成分、低倍、金相和硬度检验,确定缺陷发生的原因为热处理不当导致的应力裂纹,并提出了防止淬火开裂的改进措施。Steel used for percussive rock drill rod has strict requirements for chemical composition and heat treatment of raw materials due to its use in broken rocks.Based on the macroscopic analysis,chemical composition,macro,metallography and hardness test of 3 different kinds of defects and normal samples to be quenched after normalization,the stress cracks caused by improper heat treatment are determined.

关 键 词：钎杆钢 42CrMoA 淬火开裂 金相分析 

分 类 号：TG156.3[金属学及工艺—热处理]