摘要
1Cr13钢热加工过程中容易开裂,根据钢的合金相图,制定了加热工艺规范及选择锻造温度区间为900～1180℃。采用有限元模拟分析比较了预镦粗+扭压镦粗工艺对1Cr13环锻件的鼓形、等效应变和等效应力的影响。结果表明,预镦粗+扭压镦粗的相对直径比K=0.71,小于普通墩粗的数值。针对1Cr13辗环变形抗力大、组织不均匀的缺点,提出了两火辗环工艺。生产实践证明,采用优化后的热加工工艺可减少锻造裂纹、细化锻件晶粒、提高环件尺寸精度,从而提高了产品的合格率。
1Cr13 steel is easy to be cracked in thermal processing.According to the steel alloy phase diagram,a heating specification and the range of forging temperature from 900 to 1180 ℃ were designed.Using the finite element modeling,the influences of pre-upsetting ＋ twisting pressure upsetting process on forging drum,strain-effective and stressffective were analyzed and compared.The results show that the relative diameter ratio K of pre-upsetting ＋ twist pressure upsetting is 0.71,which is smaller than that of the ordinary.Two fire rolling process was proposed to solve the large rolling deformation resistance and inhomogeneous organization of 1Cr13 ring forgings.The production practice shows that the thermal processing after optimization can reduce forging crack,refine grains,increase forgings size precision,so as to improve the qualified rate of the product.
出处
《锻压技术》
CAS
CSCD
北大核心
2012年第5期70-73,共4页
Forging & Stamping Technology
关键词
1Cr13环锻件
镦粗裂纹
锻造温度
有限元模拟
辗环
1Cr13 ring forgings
upsetting cracks
forging temperature
finite element modeling
ring rolling
