摘要:
采用高温磨损试验机对TC11合金和H13钢进行了各种温度和载荷下的磨损试验,对比研究了它们的磨损行为。研究发现,随温度和载荷的变化,TC11合金和H13钢表现出完全不同的磨损行为。随着温度升高,TC11合金的磨损率在200℃时增加,然后大幅度降低,在400~600℃达到最低值。而H13钢的磨损率先降低,在200℃达到最低值,随后显著增加,在400~600℃出现从轻微至严重磨损的转变。其行为差异是由于氧化物的保护作用和两种材料热软化抗力的不同而引起的。
关键词:
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钛合金 /
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钢 /
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磨损行为 /
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摩擦氧化物 /
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热软化
Abstract:
The wear tests under various temperatures and loads were performed for TC11 alloy and H13 steel on a high temperature wear tester,and their wear behaviors were comparatively studied.TC11 alloy and H13 steel represent totally different wear behaviors with the variations of temperature and load.For the titanium alloy,with increase of temperature,the wear rate first increases at 200℃,then decreases substantially and maintains the lowest value at 400~600℃.For H13 steel,with increase of temperature,the wear rate first decreases to the lowest value at 200℃,subsequently markedly increases to present a mild-to-severe wear transition as a function of load at 400~600℃.All the above behaviors are suggested to be attributed to the protective ability of tribo-oxides and the differences of thermal softening resistance of the matrix between TC11 alloy and H13 steel.
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