摘要
为了研究复合钢板复板中残余应力的大小和分布状况，采用改进的盲孔法，即在测点打孔后多次扩孔，利用相似标定实验所得多组应变释放系数计算残余应力，可得不同深度残余应力的估算值。实测结果与定性分析结果吻合。测试结果还表明，复合钢板复层内存在残余庆力，且以拉－拉和拉－压应力状态为主，应力沿厚度方向非均匀分布，随深度增加应力增大，最大应力位于结合面附近，应力值超过100MPs。
Improvement to the conventional blind-hole drilling method has been done to measure residual stress in clad layer of steel clad plate welded with explosive. The improvement was the following: repeating(2～3) times reaming and measuring after the first drilling at the given position, then calculating the residual stress with the measuring results and strain-relaxation coefficients of corresponding calibration test. As results of this process the residual stress distribution along the depth was obtained. From the testing result with two-phase stainless steel 00Cr18Ni5Mo3Si2 as clad layer of a steel clad plate, it has been shown satisfactory coincidence with the quatitative analysis and measuring results of Ni-Cr steel clad by other researcher.
作者
李栋才
李霄
Li Dongcai( College of Electromechanical and Material Engineering, Xi'an Petroleum Institute, Xi'an ), Li Xiao.
出处
《石油机械》
北大核心
2003年第3期37-39,共3页
China Petroleum Machinery
基金
陕西省自然科学基金项目 (94c16)
关键词
改进
盲孔法
测试
复合钢板复板
残余应力
双相不锈钢
residual stress blind-hole drilling method test steel clad plate two-phase stainless steel
