摘要:The effect of undissolved ferrite amount in subcritically quenched 42CrMo steel on contact fatigue properties and failure mechanism were studied. The amount of undissolved ferrite in the steel were 0%,3%,10%,15% and 20% in volume fraction, respectively. The experimental results show that the existence of undissolved ferrite can increase the contact fatigue life The contact fatigue life can be prolonged with increasing the amounts of undissolved ferrite The grain size can be fined by using subcritical quenching process and the area of phase boundaries can also be greatly increased. The stress relaxation and grain refinement due to occurring of plastic deformation are main reasons for improving the fatigue life. The existence of undissolved ferrite can increase the crack initiation period. Under the experiment conditions, when the amount of undissolved ferrite is 10%, the longest contact fatigue life can be the obtained.
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Science China Earth Sciences ITS通讯 Journal of Systems Science and Complexity Chinese Optics Letters Advances in Atmospheric Sciences Chinese Annals of Mathematics,Series B Research in Astronomy and Astrophysics Science China Mathematics Science China Chemistry Transactions of Nonferrous Metals Society of China Chinese Annals of Mathematics Series B Journal of Systems Engineering and Electronics相关文章
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