摘要
在17-4PH不锈钢高锁螺母的加工过程中,发现其螺纹部位有裂纹产生。采用微观观察、加工工艺分析、挤压过程分析等方法研究了该螺母裂纹产生的原因。结果表明:裂纹是在挤压过程中产生的,挤压前坯料硬度偏高、挤压变形量偏大,使材料的塑性及心部流动性变差,最终导致螺母心部产生裂纹。对挤压前的坯料进行双重退火处理,可以避免螺母在加工过程中产生裂纹。
Cracks were found in the thread part of 17-4PH stainless steel high lock nut during processing.The causes of cracks in the nut were studied by microscopic observation,processing technology analysis and extrusion process analysis.The results show that the cracks were generated during the extrusion process.The hardness of the billet before extrusion was high and the extrusion deformation was too large,which made the plasticity of the material and the fluidity of the core worse,and finally led to the crack in the core of the nut.Double annealing treatment of the billet before extrusion could avoid cracks in the nut during processing.
作者
高靖靖
胡庆宽
王立俊
周玉宝
马勇
杨勇
GAO Jingjing;HU Qingkuan;WANG Lijun;ZHOU Yubao;MA Yong;YANG Yong(Henan Aerospace Precision Machining Co.,Ltd.,Xinyang 464000,China;Henan Key Laboratory of Fastening Connection Technology,Xinyang 464000,China)
出处
《理化检验（物理分册）》
CAS
2023年第9期62-65,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
