On the other hand, the improper heat treatment operation can not completely relieve the casting stress and remnant stress, and further enhances generation and expansion of cracks.
另一方面，热处理工艺不当使得铸造应力及机加工的残余应力无法彻底消除，这样加剧了裂纹的产生和扩展。
Aluminum matrix composites reinforced with potassium titanate whiskers were prepared by squeezing casting process. The thermal expansion and dimensional stability of such composites were investigated.
用挤压铸造工艺制备了钛酸钾晶须增强铝基复合材料，研究了其热膨胀系数和热循环尺寸稳定性。
This paper introduces the casting precipitation properties, their effects on the alloy microstructure and the methods to eliminate the precipitation of the Low-expansion superalloy GH909. and GH907.
本文研究了低膨胀高温合金GH907、GH909铸态组织中偏析的性质，偏析对合金组织的影响，以及消除偏析的方法。
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