| Research on Thermal Wear of Cast Hot Forging Die Steel Modified by Rare Earths |
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| 作者姓名： | 崔向红 王树奇 姜启川 陈康敏 |
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| 作者单位： | [1]School of Materials Science ＆ Engineering, Jilin University, Changchun 130022, China [2]School of Materials Science ＆ Engineering, Jiangsu University, Zhenjiang 212013, China |
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| 基金项目： | Project supported by the Item of Early-Term Key Technology of Industrialization, Plan Committee of China （1999317） and 863 project of China （2002AA331180） |
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| 摘 要： | Thermal wear of cast hot-forging die steel modified by rare earths（RE） was studied and compared with commercially used die steels. The function of RE and the mechanism of thermal wear of cast steel modified by RE were discussed. The results showed that with increasing content of RE, the wear rate of cast steel reduced at first and then increased. By adding 0.05% （mass fraction） RE, the cast hot-forging die steel with optimum thermal wear resistance was obtained, which was better than that of H13 and 3Cr2WSV. The large amount of coarse inclusions, （RE）2O2S, resulted from excessive RE, which obviously deteriorated thermal wear resistance. The mechanism of thermal wear of the modified cast die steel is oxidation wear and oxide fatigue delamination. The wear debris are lumps of Fe2O3 and Fe3O4.
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| 关 键 词： | 铸钢 热锻模 热磨损 稀土元素 |
| 文章编号： | 1002-0721（2007）01-0088-05 |
| 收稿时间： | 20 June 2006 |
| 修稿时间： | 2006-06-202006-09-02 |
Research on Thermal Wear of Cast Hot Forging Die Steel Modified by Rare Earths |
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| Cui , Wang Shuqi, Jiang Qichuan,Chen Kangmin.Research on Thermal Wear of Cast Hot Forging Die Steel Modified by Rare Earths[J].Journal of Rare Earths,2007,25(1):88-92. |
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| Authors: | Cui Wang Shuqi Jiang Qichuan Chen Kangmin |
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| Affiliation: | aSchool of Materials Science & Engineering, Jilin University, Changchun 130022, China;bSchool of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, China |
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| Abstract: | Thermal wear of cast hot-forging die steel modified by rare earths(RE) was studied and compared with commercially used die steels. The function of RE and the mechanism of thermal wear of cast steel modified by RE were discussed. The results showed that with increasing content of RE, the wear rate of cast steel reduced at first and then increased. By adding 0.05%(mass fraction) RE, the cast hot-forging die steel with optimum thermal wear resistance was obtained, which was better than that of H13 and 3Cr2W8V. The large amount of coarse inclusions, (RE)2O2S, resulted from excessive RE, which obviously deteriorated thermal wear resistance. The mechanism of thermal wear of the modified cast die steel is oxidation wear and oxide fatigue delamination. The wear debris are lumps of Fe2O3 and Fe3O4. |
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| Keywords: | cast steel hot-forging die thermal wear rare earths |
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