采用机械剥层和电解剥层相结合的剥层工艺,利用X射线应力分析仪研究了支承辊锻件表面中频感应淬火后的残余应力沿横截面的分布规律.结果表明:180 mm的45Cr4NiMoV钢支承辊表面中频感应淬火后表层为压应力,压应力层深约30 mm,从表往里逐渐由压应力转变为拉应力,拉应力峰值出现在距表面约60 mm处,不在支承辊锻件的中心部位.通过对支承辊锻件表面感应淬火后残余应力沿横截面分布规律的研究,可为生产特大型支承辊锻件制定合理的生产工艺方案提供可靠的试验依据.

By combining mechanical peeling and electrolytic peeling,the residual stress distribution along the cross section of backup roll forgings after surface induction hardening was studied with X-ray stress analyzer.The results show that for surface induction hardened 180 mm 45Cr4NiMoV steel backup roll,the surface stress was compressive stress with the depth of 30 mm,and from surface to center the compressive stress gradually changed to tensile stress and the maximum tensile stress was not located at center part of the backup roll,whereas it appeared at position of 60 mm from the surface.By studying the residual stress distribution rule along the cross section of backup roll forgings after surface induction hardening,it could provide reliable experimental basis for making reasonable process scheme in oversize backup roll forgings production.