| Mechanism of Annealing Softening of Rolled or Forged Tool Steel |
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| 作者姓名： | LIU Zong-chang GAO Zhan-yong DONG Xue-dong DAI Jian-ming |
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| 作者单位： | 1. Baotou University of Iron and Steel Technology，Baotou 014010，China; 2. Fushun Special Steel Ltd Co，Fushun 113001，China |
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| 基金项目： | ItemSponsoredbyProvincialNaturalScienceFoundationofInnerMongoliaofChina (961 0E2 2 ) |
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| 摘 要： | ＲｅｃｅｎｔｌｙｍａｎｙｄｏｍｅｓｔｉｃｆａｃｔｏｒｉｅｓｐｒｏｄｕｃｅｔｏｏｌｓｔｅｅｌｓａｃｃｏｒｄｉｎｇｔｏＡｍｅｒｉｃａｎｏｒＧｅｒｍａｎｓｔａｎｄａｒｄｓ ,ｆｏｒｅｘａｍｐｌｅ ,Ｈ13,Ｓ5 ,Ｓ7,Ｄ2 ,Ａ6ａｎｄＸ4 5ＣｒＮｉＭｏ4ｅｔｃ .ｗｈｉｃｈｒｅｑｕｉｒｅａｎｎｅａｌｉｎｇａｆｔｅｒｒｏｌｌｉｎｇｏｒｆｏｒｇｉｎｇｆｏｒｓｏｆｔｅｎｉｎｇ .Ｔｈｅｒｅｑｕｉｒｅｍｅｎｔｓｆｏｒｈａｒｄｎｅｓｓａｒｅｖｅｒｙｓｔｒｉｃｔｆｏｒｐｒｏｃｅｓｓｉｎｇ .Ｕｓｕａｌｌｙ ,ｔｈｅｈａｒｄｎｅｓｓｉｓ…
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Mechanism of Annealing Softening of Rolled or Forged Tool Steel |
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| LIU Zong-chang ,GAO Zhan-yong ,DONG Xue-dong ,DAI Jian-ming .Mechanism of Annealing Softening of Rolled or Forged Tool Steel[J].Journal of Iron and Steel Research,2003,10(1). |
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| Authors: | Liu Zongchang GAO Zhanyong DONG Xuedong DAI Jianming |
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| Abstract: | In order to reduce hardness of rolled or forged steels after annealing and improve processability, the diameter and dispersity of carbides were measured by SEM and quantitative metallography. The microstructure of annealed steel was analyzed by TEM. The effects of the factors such as solute atoms, carbides, grain boundary and interphase boundary were studied. The mechanism of annealing softening of steels was analyzed on the examples of steels H13, S5, S7, X45CrNiMo4, which are treated with new technology. The results showed that the softening of H13, S7, S5 is easier obtained by isothermal or slow cooling annealing from slightly below A 1, but hardness of X45CrNiMo4 after annealing is reduced effectively by obtaining coarse lamellar pearlite. Economic results can be obtained from good processability. |
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| Keywords: | tool steel annealing softening |
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