ABSTRACT AB STRACT Along with the rapid development of modem industry, such as energy, transportation and metallurgy, many heavy forgings with high quality are required.
现代能源、运输、冶金工业的迅速发展，要求重型机械制造业能提供优质大型锻件。
参考来源 - 大型锻件锻造新理论与新工艺的数值模拟Theproduction capacity and quality of heavy forgings is one of important symbols to evaluatethe industry level of a country.
大锻件的生产能力和质量是衡量一个国家工业发展水平的重要标志之一。
参考来源 - 150MN锻造液压机本体组合结构研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The conventional technologies for heavy forgings tend to generate crack origins.
大型锻件的常规生产工艺存在萌生裂纹源的变形机制。
The internal cracks originated from inclusions are one of main forms of defects for heavy forgings.
夹杂性裂纹是大型锻件致废的主要缺陷形式之一。
There are many inevitable defects in raw ingots. And the microstructure is the key factor which affects the high ductility of heavy forgings such as in nuclear power plant.
原始钢锭中含有不可避免的凝固缺陷，并且在核电等大型锻件中，其内部微观组织晶粒度是影响其高韧性能的关键因素。
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