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摘要：
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本文分析指出,在大型自由锻件生产过程中存在一种新的力学效应,(定义为RST效应),导致产品内部夹层裂纹缺陷。文中详细推导了RST效应的作用机制和产生条件,提出了避免其危害作用的工艺准则。经生产性验证,经济效益显著。
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A new mechanical effect has been found by theoretical analysis and experimental research, which is defined as Rigid Slide Tearing Effect. It may cause layer inner cracks in the centre of large free forgings during press hot forging processes. The mechanism and influences of the RST effect was studied. New forging criterions was developed to avoid the harms. Satisfactory results has been made to improve the quality of large forgings during past three years in practice.
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基金项目：
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作者简介：
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参考文献：
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[1] .任猛、张宝印、金锡钢、吴昊、刘喜良,“大型圆饼类锻件锻造及RST效应”.〈大型铸锻件〉待发表
[2] .任猛、金锡钢、张宝印、吴昊、刘喜良,“制造优质大型锻板的工艺条件”〈大型铸锻件〉待发表
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