亚临界淬火对LZ50钢车轴性能的影响

Locomotive & Rolling Stock Technology(2010)

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Abstract
对LZ50钢车轴亚临界淬火前后的力学性能、晶粒度以及车轴表面残余应力的变化进行了试验,分析了亚临界淬火对LZ50钢车轴拉伸性能和表面质量的影响。试验表明,亚临界淬火对车轴拉伸性能无明显影响,然而车轴表面的残余应力变化很大,可由拉应力改变为压应力,而且通过优化加工工艺,表面压应力的增幅会更大,说明亚临界淬火能有效提高车轴的疲劳寿命。
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Key words
Surface Residual Stress,Axle,Sub-critically Quenching,Tensile Property,LZ50 Steel
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