摘要
利用X射线衍射残余应力分析仪测定了6.8级螺栓热处理前后表层轴向和切向残余应力及其分布,分析了冷镦和缩径对螺杆与螺栓头部过渡圆角处残余应力的影响。结果表明:热处理前螺栓表层残余应力分布不均匀,最大残余拉应力为155.8MPa,热处理后残余应力降低幅度可达50%;半径方向上,残余应力随深度的增加由压应力向着拉应力转变。
The axial and tangential surface residual stress and its distribution of 6.8grade bolts before and after heat treatment were measured by X-ray residual stress tester,and the effects of cold heading and necking down on the residual stress of screw and bolt head transition fillet were analyzed.The results show that the distribution of surface residual stress of the bolts before heat treatment was nonuniform,the maximum residual tensile stress was155.8 MPa,and the amplitude of decline was up to 50% after heat treatment.In the radius direction,with the increase of the depth,the residual stress changed from compress stress to tensile stress.
出处
《理化检验（物理分册）》
CAS
2016年第2期99-103,113,共6页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
6.8级冷镦螺栓
表面残余应力
X射线衍射
热处理
6.8grade cold heading bolt
surface residual stress
X-ray diffraction
heat treatment
