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42CrNiMo钢螺杆芯轴疲劳断裂失效分析

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Indexed by:期刊论文

Date of Publication:2017-06-25

Journal:热处理技术与装备

Volume:38

Issue:3

Page Number:47-50

ISSN No.:1673-4971

Key Words:42CrNiMo钢;芯轴缺陷;多源疲劳;疲劳断裂

Abstract:采用X射线荧光光谱仪、金相显微镜、洛氏硬度计、拉伸试验机、扫描电镜等,对42CrNiMo钢塑料造粒机螺杆芯轴断裂原因进行分析.结果表明:42CrNiMo钢的化学成分、金相组织及力学性能均符合技术标准要求.失效芯轴属于多源疲劳断裂,芯轴齿根表面加工缺陷形成的应力集中是造成疲劳断裂的主要原因.

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