大型筒体零件焊后固溶处理的变形控制
Deformation Controlling of As-welded Large-sized Cylinder by Solution Treatment
周文凤, 李昌安, 李洪卫
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作者单位：中国工程物理研究院 机械制造工艺研究所, 四川 绵阳 621900
中文关键字：筒体； 焊后； 固溶处理； 变形控制
英文关键字：cylinder; as-welded; solution treatment; deformation controlling
中文摘要：通过对焊后不锈钢筒体零件固溶处理变形影响要素的分析，确认变形的主要原因是工件热处理前存在较大残余应力和热处理过程产生的应力， 通过采取设计起吊工装， 保证工件在转移和冷却过程中垂直；在处理时安放支撑工装，防止处理过程中的椭圆变形和向内收缩变形；固溶前进行退火， 严格控制装炉和冷却工艺等措施，使工件热处理后变形控制在1 mm以内。
英文摘要：The deformation characteristic of as-welded large-sized cylinder at solution treatment was studied. The results show that the deformation is ascribed to the stress formed by welding and heat treatment process. Through several methods, the deformation of cylinder after solution treatment is controlled in 1 mm successfully. Firstly, the cylinder is controlled vertically in moving and cooling process using special lifting equipment. Secondly, the elliptical and shrinking deformation by solution treatment is prevented using special fixed equipment. Thirdly, the annealing treatment carried on increased before solution treatment, and the charging and cooling technology are controlled strictly.