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采用正交实验法,以浇注温度、裂解材料的预热温度和模壳预热温度为主要影响因素,以机车钢轮铸件的缩松缩孔、有效应力和最大变形量为评价指标,对机车钢轮铸件的熔模铸造工艺进行了优化。结果表明,机车钢轮铸件适宜的熔模铸造工艺为:A2B2C3,即浇注温度为1 500℃,裂解材料预热温度为480℃,模壳预热温度为1 150℃;最优化熔模铸造工艺下得到的机车钢轮试样的断后伸长率为13%、抗拉强度为477 MPa。
Orthogonal experiment was used to study the effects of pouring temperature, preheating temperature of cracked material and preheating temperature of mold shell on the shrinkage shrinkage, effective stress and maximum deformation of locomotive steel wheel castings, Investment casting process for steel castings has been optimized. The results show that the suitable investment casting process for locomotive steel wheel casting is A2B2C3, that is, the pouring temperature is 1 500 ℃, the preheating temperature of cracked material is 480 ℃ and the preheating temperature of mold shell is 1 150 ℃. The optimal investment casting process Under the obtained locomotive steel sample elongation at break of 13%, the tensile strength of 477 MPa.