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Effect of thermohydrogen treatment on microstructural evolution and properties of TA15 alloy

机译:热氢处理对TA15合金微观结构演化与性能的影响

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Titanium alloys are widely used in aerospace structural parts. However, they have the characteristics of poor thermal conductivity, high temperature strength and high cutting temperature, which is easy to stick the tools when cutting. Thermohydrogen treatment (THT) is a way that utilizes the reversibility of hydrogen in the titanium alloys to improve the cutting performance. In this article THT process were carried out on TA15 alloy in a vacuum tube furnace. The results shows that the hydrogen content increases with the increase of hydrogen permeation temperature and pressure. As the hydrogen content increases, β phase increases and converts to the hydride S phase. With the increase of hydrogen content, the cutting force decreases first and then increases. The cutting force is the lowest when the hydrogen content is about 0.3%.
机译:钛合金广泛用于航空航天结构部件。 然而,它们具有差的导热系数,高温强度和高切削温度的特点,切割时易于粘附工具。 热氢处理(THT)是利用钛合金在氢气中的可逆性改善切割性能的一种方式。 在本文中,在真空管炉中的TA15合金上进行。 结果表明,氢含量随着氢渗透温度和压力的增加而增加。 随着氢含量的增加,β相增加并转化为氢化物相。 随着氢含量的增加,切割力首先减小,然后增加。 当氢含量约为0.3%时,切割力是最低的。

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