大型加氢反应器仿形过渡段极限制造技术

Extreme Manufacturing Technology of Profiling Transition Section of Large Hydrogenation Reactor

对加氢反应压力容器下过渡段外形特点进行分析,对不同的成形方案进行对比,选择仿形合锻方法进行生产,对冶炼、锻造、热处理等全流程制造所面临的问题采取相应的解决措施。通过对原材料严格筛选,加长氩气软吹时间,使Al_(2)O_(3)等脱氧产物充分上浮。在针对现有扩孔辅具尺寸及水压机净空距不足的情况下,通过新投加高垫及废置辅具加工再利用、锻造过程尺寸控制等措施进行极限锻造。通过合理的热处理工艺及化学元素内控等方面提高锻件性能,充分验证了加氢反应压力容器下过渡段制造技术合理可行。

The shape characteristics of the lower transition section of the hydrogenation reaction pressure vessel are analyzed,different forming schemes are compared,and the profiling forging method is selected for production.The corresponding solutions are taken to solve the problems faced by the whole manufacturing process,such as smelting,forging and heat treatment.Through the strict screening of raw materials,the argon soft blowing time is extended,so that the deoxidation products such as Al_(2)O_(3)can float upward completely.In view of the size of the existing reaming assistive device and the shortage of clearance of hydraulic press,the extreme forging is carried out by adding new high pad,machining and reusing the abandoned assistive device,and controlling the size during the forging process.Through reasonable heat treatment process and internal control of chemical elements,the performance of forging is improved,and the manufacturing technology of the lower transition section of hydrogenation reaction pressure vessel is proved to be reasonable and feasible.