K403镍基高温合金圆形平板铸件热裂倾向分析及解决措施  

Hot Tearing Susceptibility Analysis and Solving Measure of Circular Plate Casting of K403 Nickel-Based Superalloy

作　　者：赵会彬[1] 周同金 冯微[1] 

机构地区：[1]北京航空材料研究院,北京100095 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《铸造》2017年第6期554-558,共5页Foundry

摘　　要：针对K403镍基高温合金圆形平板铸件出现的热裂现象,采用有限元模拟软件ProCAST对不同浇注温度下铸件的凝固过程进行对比分析,结合模拟结果对热裂进行预测,并与工艺试验结果对比。结果表明:当浇注温度为1 500℃时,铸件与冒口部位结合处形成最大应力值为61 MPa;当浇注温度1 450℃时最大应力值为39 MPa。实际浇注过程中浇注温度1 500℃条件下产生热裂,而浇注温度1 450℃时未见热裂纹产生。The solidification processes at different pouring temperatures were simulated by the finite element simulation software ProCAST in order to solve the hot tearing problem in circular plate casting of K403 nickel-base superalloy. The susceptibility of hot tearing defects was predicted by analyzing the simulation results and comparison with the practical casting process. The analysis results show that the maximum tensile strength of the juncture of top riser and casting reached 61 MPa at the pouring temperature of 1 500 ℃,which is greater than at 1 450 ℃. In the practical process of casting, the hot tearing defects were visible at 1 500 ℃ pouring temperature, while no crack occurred at 1 450 ℃. So the lower pouring temperature is advantageous to reducing the hot tearing susceptibility of the casting.

关 键 词：K403 铸件 数值模拟 热裂 

分 类 号：TG132.3[一般工业技术—材料科学与工程] TG291[金属学及工艺—合金]