钢锭模棱数对典型钢锭凝固过程的影响研究
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摘要
使用铸造模拟软件ProCAST系统地研究了钢锭模棱数对典型钢锭凝固过程的影响,具体包括完全凝固时间、凝固顺序、缩孔缩松、应力变化。结果表明:钢锭模棱数对钢锭的传热影响不显著;钢锭模重复使用过程中,压应力与拉应力的反复循环作用导致产生裂纹的机率增加;钢锭模凸面处先于凹面处开裂。
The influence of the ingot mould edge-number on the solidification process of a typical steel ingot was systematically studied by using the casting simulation software ProCAST, including the complete solidification time,solidification sequence, shrinkage porosity and stress change of ingot mould. The results show that the influence of the ingot mould edge-number on the heat transfer of the ingot is not significant. In the process of repeated use of ingot mould, the repeated cyclic action of compressive stress and tensile stress increases the probability of cracking. The ingot mould cracks at the convex surface before the concave surface.
The influence of the ingot mould edge-number on the solidification process of a typical steel ingot was systematically studied by using the casting simulation software ProCAST, including the complete solidification time,solidification sequence, shrinkage porosity and stress change of ingot mould. The results show that the influence of the ingot mould edge-number on the heat transfer of the ingot is not significant. In the process of repeated use of ingot mould, the repeated cyclic action of compressive stress and tensile stress increases the probability of cracking. The ingot mould cracks at the convex surface before the concave surface.
引文
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[10]贾志宏.金属液态成型原理[M].北京:北京大学出版社,2011.
[2]高志强,邱伟.铸造充型过程初始温度场的数值模拟及实验研究[J].清华大学学报:自然科学版,1996,36(8):50-55.
[3]马薇,赵建华,宋刚.冒口保温条件对大型钢锭凝固过程影响的数值模拟[J].热加工工艺,2012,41(21):41-43.
[4]王树达,吴秀娥,张德臣,等.模厚比K值对钢锭模热应力分布的影响[J].特殊钢,1996,17(4):15-18.
[5]魏鑫燕,朱荥,林腾昌.大钢锭凝固过程的数值模拟研究[J].铸造技术,2012,32(11):1576-1579.
[6]仇春荔,陶盼,廖恒成,等.浇注速度对铸件充型过程流场影响的数值模拟[J].铸造,2008,56(11):1190-1194.
[7]王忠,侯华,牛晓峰,等.不同浇注方式下浇注速度的选择研究[J].铸造技术,2009,30(6):812-815.
[8]卜恒勇.浇注温度对钢锭凝固过程的影响[C]//河北省冶金学会,重机行业炼钢分会,中国金属学会特殊钢分会特钢冶炼学术委员会.2014年钢锭制造技术与管理研讨会论文集.洛阳:河北省冶金学会,重机行业炼钢分会,中国金属学会特殊钢分会特钢冶炼学术委员会,2014.
[9]江建华,刘庄.影响锭模寿命结构因素的研究[J].大型铸锻件,1997(1):1-7.
[10]贾志宏.金属液态成型原理[M].北京:北京大学出版社,2011.