The yield strength of vanadium bearing steel improves at lower temperature because of low phase transformation startingtemperature.
含钒钢因相变开始温度低，其屈服应力快速增加的温度较低。
2
This article is first determined the startingtemperature of the main steel structure of the closure, We design closure process and defined the technical requirements for the closure.
从确定主体钢结构的合龙温度入手，设计了合龙工艺，明确合龙技术要求。
3
Through the rolling experiments, the influencing regularity of the rolling startingtemperature and the rolling reduction on the microstructure and the mechanical properties has been obtained.