大型钢锭锭重兼容设计的适用性研究和应用  

Applicability Research of Ingot Weight-Compatible(IWC)Design of Large Ingot and Application

作　　者：刘宁宁 许长军[1,2] 吕严 胡翰廷 张岩 Liu Ningning;Xu Changjun;LüYan;Hu Hanting;Zhang Yan(School of Materials and Metallurgy,Liaoning University of Science and Technology,Anshan 114051;Metallurgical Engineering Technology Center,Liaoning University of Science and Technology,Anshan 114051)

机构地区：[1]辽宁科技大学材料与冶金学院,鞍山114051 [2]辽宁科技大学冶金工程技术中心,鞍山114051

出　　处：《特殊钢》2022年第2期6-11,共6页Special Steel

基　　金：国家自然科学基金项目(No.51504130,51834002);辽宁科技大学专项基金项目(No.2017HZ01);辽宁科技大学优秀人才项目(No.601011507-15)。

摘　　要：基于锭重兼容设计了插板式(C)、套圈式(T)和垫圈式(D)三种锭型,并运用有限元软件模拟10~15 t、20~27 t、29~35 t、39~45 t、50~60 t 42CrMo4钢锭在三种锭型下的凝固特性。结果表明,在10~60 t锭重内,随兼容量增大,凝固末期液相穴愈加深入锭身,在D锭型中表现尤为明显。当兼容量占原始锭重10%以下时,三种锭型凝固时间相近,中心疏松长度差均保持在69 mm以下;当兼容量超过10%时,D锭型相对C锭型和T锭型凝固时间明显减少,中心疏松长度延长了107~232 mm;而当兼容锭重超过20%时,钢锭中心疏松长度将增大两倍以上,钢锭质量明显恶化。因此,当兼容锭重在10%以下时,宜采用T锭型和D锭型;当兼容量在10%~20%时宜采用T锭型和C锭型。在现场进行42CrMo4钢20~27 t兼容锭工业应用,其超声波探伤结果均达到Ⅱ级要求。Based on the Ingot Weight-compatible(IWC)design,three ingot designs[embedded insulation board(C),assemble ferrule(T)and assemble gasket(D)]are designed,and the solidification pattern of the 10~15 t,20~27 t,29~35 t,39~45 t and 50~60 t 42CrMo4 steel ingots is predicted by finite element software.It can be seen that with 10~60 t ingot the liquid core more and more deep into ingot body especially in D design with the increase of compatible volume.When the compatible volume is less than 10%of the original ingot weight,the solidification time of the three designs is similar,and the difference of the center porosity length is below 69 mm.When the compatible volume is greater than 10%,the solidification time of D ingot decreases compared with two other mode(C and T ingot),and the center porosity length extends 107~232 mm.However,when the compatible volume exceeds 20%,the length of the center porosity of ingot will of ingot increase more than two times,and the quality of the ingot will worsen obviously.Therefore,when the compatible volume is less than 10%,T and D mode should be selected.T and C mode are taken into consideration when the compatible volume is between 10%and 20%.The in-situ commercial application for 42CrMo4 steel 20~27 t IWC ingot shows that,the ultrasonic detection results of ingots have reachedⅡgrade requrement.

关 键 词：大型钢锭 锭重兼容 凝固时间 中心疏松 

分 类 号：TF777[冶金工程—钢铁冶金]