Failure analysis of forged and induction hardened steel cold work rolls

被引：39

作者：

Azevedo, CRF ^{[1
]}

Neto, JB ^{[1
]}

机构：

[1] Inst Pesquisas Tecnol Estado Sao Paulo SA, Lab Failure Anal, BR-01064970 Sao Paulo, Brazil

来源：

ENGINEERING FAILURE ANALYSIS | 2004年 / 11卷 / 06期

基金：

巴西圣保罗研究基金会;

关键词：

rolling mill; rolling contact; fatigue; spalling; heat treatment;

D O I：

10.1016/j.engfailanal.2003.11.005

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The premature failure of two forged and induction hardened low alloy steel work rolls used for cold rolling of high and medium carbon steel was investigated. Microhardness profiles indicated that the values of the effective induction hardening depth for both rolls are below the user's requirement. Tensile testing results of the core of the rolls indicated that the tensile and yield strengths are also below the manufacturer's requirements, the latter being 50% below the minimum requirements. The microstructure of the spalling surface presented tempered martensite, dispersed chromium carbides and spheroidised pearlite. The presence of spheroidised pearlite may have promoted the sub-superficial nucleation of rolling contact fatigue cracks. The heat-treatment schedule should be optimised in order to increase the depth of the hardening layer and the mechanical properties of the core, so that the contact fatigue life of the rolls can be improved. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：951 / 966

页数：16

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