Influence of the mode of thermal treatment and load ratio on the cyclic crack-growth resistance of wheel steels

被引：13

作者：

Ostash, O. P. ^{[1
]}

Andreiko, I. M. ^{[1
]}

Kulyk, V. V. ^{[1
]}

Babachenko, O. I. ^{[2
]}

Vira, V. V. ^{[1
]}

机构：

[1] Ukrainian Natl Acad Sci, Karpenko Physicomech Inst, Lvov, Ukraine

[2] Ukrainian Acad Sci, Nekrasov Inst Ferrous Met, Dnepropetrovsk, Ukraine

来源：

MATERIALS SCIENCE | 2009年 / 45卷 / 02期

关键词：

wheel steel; thermal treatment; fatigue; crack resistance; RAILWAY WHEELS;

D O I：

10.1007/s11003-009-9177-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the microstructure, mechanical properties, and micromechanism of fatigue fracture of high-strength railway-wheel steel (0.63% C and 0.1% V). The necessity of elevation of the cyclic fracture toughness of this type of steel by isothermal hardening and tempering at 500A degrees C is substantiated. It is shown that the cyclic crack-growth resistance of steel decreases for high loading amplitudes as the load ratio (simulating the influence of residual thermomechanical stresses) increases.

引用

页码：211 / 219

页数：9

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