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Abstract：
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The paper summarizes the application state of precision casting of hot-forging die at home and abroad and also analyzes the reasons why it is not used widely domestically. The main obstacles are unreasonable alloying , high demand for impact toughness, careless control of making processes, lower thermal fatigue resistance and high-temperature wear resistance,etc.. The hot-forging dies made by new-type precision casting die steel are applied on site. The advantages of high properties, longer life and apparent economical benefits are obvious . The results show that the stable die life can reaches to 5000~7000 pieces, which is 80% higher than the dies by forging steel. The predominant failure patterns are plastic deformation, wear and thermal fatigue without brittle fracture. As a result, the precision casting of hot-forging dies are a prospective alternative for die-making.
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Funds：
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国家计委产业化前期关键技术与成套设备研制开发项目(1999317)
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AuthorIntro：
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Reference：
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