高碳高合金锻钢冷轧工作辊的锻造工艺开发

Development of forging process for cold rolling work roller with high carbon and high alloy steel

从工程应用的角度对合金含量介于半高速钢和高速钢之间的一种8%Cr锻造冷轧工作辊新材质的锻造工艺开发进行研究。通过将相图分析、热模拟实验与小件锻造实验相结合,确定了当前合金的锻造温度区间为950~1150℃,并通过对锻件在工艺执行中的冷却状况和锻造抗力情况进行有限元模拟,确定了工艺执行时间和锻造设备吨位。在室内实验和计算分析的基础上,考虑了自由锻造生产中物流、温度及锻造裂纹控制的特点,制定了3阶段的锻造工艺实施方案和时间控制措施,实现了生产试制1次成功。结果表明,大型自由锻锻件新材质的锻造工艺可以通过计算机分析与物理模拟实验相结合的方式获得较为可靠的工艺参数,实现产品的低成本开发。

The development of forging process for a new material of 8%Cr with the alloy composition between semi-HSS and HSS for cold rolling work roller was researched from an engineering application perspective.Then,based on the phase diagram analysis,the thermal simulation experiment and the small scale forging experiment,the forging temperature range of the present alloy was determined at 950-1150℃,and the process execution time as well as the tonnage of forging equipment were determined by finite element analysis on the cooling status and the forging resistance during the forging process.Furthermore,according to the experimental results and simulation analysis,considering the characteristics of logistics,temperature and forging crack control during the free forging production,three-stage forging process scheme and time control measures were developed,and the first successful trial production was achieved.The results show that the reasonable forging process parameters of a new material for large free forgings are obtained by combining computer analysis and physical simulation experiments,and the low cost development of product is realized.