板式换热器冷冲压波纹板片热处理工艺研究

摘要

板式换热器传热元件是通过油压机冷冲压而成的不锈钢波纹板片,奥氏体不锈钢板片冷冲压后存在残余应力并且易产生形变马氏体组织,耐腐蚀性能下降. 对厚度1 mm的321奥氏体不锈钢冷冲压波纹板片进行取样开展热处理试验,研究发现,在1050 ℃下保温5 min后进行水冷或风冷可以消除残余应力与恢复等轴的奥氏体组织,最后对工业实际开展板片热处理工艺中可能遇到的难题进行探讨.%Stainless steel corrugated plates as plate heat exchanger heat transfer components were pro-cessed through cold stamping by oil press.There was residual stress in stamped plates after cold stamping, which induced deformation martensite structure.Sampling from 1 mm thick 321 austenitic stainless steel corrugated plates and carrying out heat treatment tests,the study was found that under 1050 ℃holding 5 min then heat water or air cooling could eliminate residual stress and restore the equiaxial austenite crystal grain organization,finally plate heat treatment process may encountering problems were discussed in the following actual industry.