摘要
利用装甲钢的实测物性参数及淬火过程数值模拟平台NSSQ,建立了某型号装甲防护厚板淬火过程的计算模型。该模型考虑了装甲防护厚板的实际淬火工艺,采用1/2对称模型进行简化。材料本构考虑了热变形、相变变形、经典弹塑性变形、相变塑性等效应。厚板水淬过程采用了实测的换热系数。各特征点淬火后变形量的模拟值与实测值基本吻合。对淬火过程变形温度、等效应力、等效应变及变形演化的分析,结果表明,装甲加热阶段的变形主要为均匀胀大变形,冷却阶段由于冷却速度的不均匀性,凹槽的存在对淬火变形的不均匀程度影响显著。
A numerical model of larger-size plate for armour steel during quenching was established. This model was based on NSSQ （numerical simulation system for quenching process）, which was developed for thermo-elastic-plastic de- scription during quenching. Moreover, physical properties data needed during numerical simulation of quenching were acquired using the experimental method. Transformation strain, as well as thermal strain, transformation plasticity strain, elastic stain, classical plasticity strain was considered. The results indicate that compared to measured values, the results can satisfy the engineering specification. The distortion is caused by difference of cooling rate, and the groove has impor- tant contribution.
出处
《金属热处理》
CAS
CSCD
北大核心
2008年第8期73-77,共5页
Heat Treatment of Metals
基金
国家自然科学基金项目(50575124)
关键词
淬火
数值模拟
畸变预测
相变
quenching
numerical simulation
distortion prediction
transformation
