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。
Conclusion: the expansion properties of the refractory die material that we synthesized can fulfil the application requirements of slip casting core of sintered titanium powder.
结论：该材料的主要膨胀性能可以满足钛合金粉浆涂塑底层冠的要求。
Manufactured by casting polyurethane, main seal ring used in expansion ring testing device for pipeline was designed.
采用浇注型聚氨酯材料，设计了一种管道用胀环试样试验台主密封圈。
Meantime, in the course of casting, we shall take measures to solve the problems such as the bending and deformation due to the heating expansion of embedded steel pipes...
同时在铸造过程中，必须采取措施解决镶铸管因受热膨胀而产生弯曲变形、被液态金属熔穿和减少铸件的热应力等问题。
The influence of temperature on thermal expansion of photo-curing resin used for rapid prototype(RP)and the preparation process of the rapid-precision casting ceramic shell were studied.
研究了装炉温度对快速成形用光固化树脂热膨胀特性的影响和型壳制备工艺。
The influence of temperature on thermal expansion of photo-curing resin used for rapid prototype(RP)and the preparation process of the rapid-precision casting ceramic shell were studied.
研究了装炉温度对快速成形用光固化树脂热膨胀特性的影响和型壳制备工艺。
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