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首页> 外文期刊>Journal of Materials Engineering and Performance >Mold Wear during Permanent-Mold Casting of Ti-6Al-4V
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Mold Wear during Permanent-Mold Casting of Ti-6Al-4V

机译：Ti-6Al-4V永久铸造过程中的模具磨损

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摘要

Mold wear during the casting of Ti-6Al-4V in a permanent (steel) mold was investigated using a combination of macro- and micro-scale observations and measurements. For this purpose, a steel mold with interchangeable inserts of three candidate mold steels (H13, P20, and 1040) was used. Inserts were removed at regular intervals during casting under prototype-production conditions and inspected to assess mold wear. Two major mold wear types were identified: soldering and "wrinkling." Soldering was concluded to be a result of local over-heating of the mold, and wrinkling a result or cyclic Stresses caused by a combination of solid-state phase transformations and large temperature gradients. The 1040 inserts performed the best; soldering was less severe and wrinkling did not occur. The better performance of the 1040 inserts was attributed to lower mold temperatures and thermal gradients due to the higher thermal conductivity of 1040 relative to H13 or P20.
机译：结合宏观和微观观察与测量，研究了在永久（钢）模具中铸造Ti-6Al-4V期间的模具磨损。为此，使用了具有三个候选模具钢（H13，P20和1040）的可互换嵌件的钢模。在原型生产条件下的铸造过程中，定期地移除镶块，并进行检查以评估模具的磨损。确定了两种主要的模具磨损类型：焊接和“起皱”。得出的结论是，焊接是由于模具局部过热而导致的，而皱纹是由于固态相变和大温度梯度的组合而导致的循环应力。 1040刀片的性能最佳;焊接不那么严重，也没有起皱。 1040刀片的更好性能归因于较低的模具温度和较低的热梯度，这是由于1040相对于H13或P20的导热系数更高。

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