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随着我国化学工业和国防工业的发展,不锈钢元饼类型的锻件生产数量越来越多。其中大型铬镍奥氏体钢元饼锻件的心部锻透性是一个突出的质量问题。其原因有:铬镍奥氏体钢大型钢锭表面缺陷较多,又不能进行高温火焰清理(火焰清理时极不易熔化);钢锭不宜采用多次镦粗拔长;奥氏体钢热处理不能细化组织。要改善心部质量,关键是锻造工艺。零件的内膛是工作面,因此,对内膛的质量一定要
With the development of China’s chemical industry and national defense industry, the production of stainless steel yuan cake type forgings is more and more. One of the large chrome-nickel austenitic steel pie cake forging heart forging permeability is a prominent quality problem. The reasons are: chrome-nickel austenitic steel large ingot surface defects more, but also can not be carried out at high temperature flame cleaning (flame cleaning is not easy to melt); steel ingot should not be used upsetting length; austenitic steel heat treatment can not be refined organization. To improve the quality of the heart, the key is forging process. Parts of the bore is the face, therefore, the quality of the bore must be