高压釜不锈钢衬里液压胀合试验研究

Test and research on hydraulic bulge of stainless steel lining of high pressure reactor

对一种新的高压釜不锈钢衬里液压胀合方法进行了试验研究.该方法将衬里的胀合处理与高压釜的水压试验结合一次完成,胀压衬里使其产生塑性流动,达到全部或部分消除衬里与壳体之间初始间隙的目的.通过在液压胀合处理及加压试验中实测的层间间隙、应力和应变来评估其贴合效果.试验结果表明,尽管初始间隙分布不均匀,但经胀合处理后残余间隙仅为0.6～0.9 mm.壳体材料在升压循环过程中处于弹性范围内,在内压大于3.1 MPa时,衬里和基体基本变为一体化材料,应力与内压力的线性相关系数大于0.99.安装夹套并经低温退火后,对胀合效果没有负面影响.

New hydraulic bulge method and estimated conjoint results were explored. The equipment＇s overall water. pressure test is developed to get lining bulge and plastic deformation, to eliminate the gap between lining and shell. Integrate effect was estimated by measured layer gap, stress and strain through hydraulic bulge and pressure increase test. The test results indicate that, although preliminary gap is not uniform, remnant clearance is only 0. 6- 0. 9 mm after hydraulic bulge. During pressure increase test, shell material always keeps elastic. Lining and shell almost become an integrated material after the initial pressure more than 3. 1 MPa, the linearity between cylinder stress and initial pressure is more than 0.99. Installed sheath and lower temperature anneal does not negatively affect on conjoint effect.