S45C钢零件淬火开裂原因分析

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S45C钢零件淬火开裂原因分析

周鼎华(无锡法福表面处理技术有限公司，江苏无锡 214145)

摘要：对淬火开裂的S45C钢零件进行了化学成分、金相组织、断口分析及硬度检测。结果表明，原材料局部夹杂物偏析较重，晶粒粗大，带状组织和Sn、Sb、As有害元素的存在及P含量较高是导致开裂的主要原因，采用亚温淬火可防止零件的开裂。
关键词：S45C钢；淬火开裂；亚温淬火
中图分类号：TG162.79
文献标识码：Ｂ
文章编号：0254-6051（2007）04-0092-3

Quench Cracking Analysis of S45C Steel Parts

ZHOU Ding-hua

(Wuxi Fafu Techniques Surfaces Treatment Co. Ltd., Wuxi Jiangsu 214145, China)

Abstract: The chemical composition, microstructure, fracture morphology and hardness of cracked S45C steel parts were tested and analyzed. The results show that the main reasons for causing the quench cracking are coarse grain size, excessive inclusion, banded structure of raw materials, some baneful elements such as Sn, Sb, As as well as excessive P, and intercritical hardening applied can prevent the parts from quench cracking.
Key words: S45C steel; quench cracking; intercritical hardening