| High Temperature Wear Characteristics of a New Hot Work Die Steel CH95 |
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| 作者姓名： | CHENG Xianhua SHANGguan Qianqian WU Ju |
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| 作者单位： | School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200030,China |
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| 基金项目： | Funded by the Cultivating Program for ＇Elite for New Century＇ of Ministry of Education of China（No.[2002]8） |
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| 摘 要： | High temperature wear characteristics of a new hot work die steel CH95 doped with a small amount of rare earth （ Re ） and boron （ B ） have been investigated and compared with those of conventional die steel H11 at a series of temperatures and loads. Worn surfaces of CH95 steel and H11 steel were analyzed with a scanning electron microscope. It is found that high temperature mechanical properties of CH95 steel are much better than those of H11 steel. The oxide layer formed on the worn surface plays an important role in wear resistance at high temperature. When the load is less than 63 N, the surface oxide layer keeps integrated and the effect of load on high temperature wear is small. When the load is higher than 63 N, the supporting ability of matrix to the oxide layer decreases with the increase of load, which results in an increase of wear rate. Compared with H11 steel, the wear resistance of CH95 steel is much better and the worn surface of CH95 steel is smoother. It is easier for CH95 steel to form a compact and integrated surface oxide layer at high temperature than for Hll steel, which protects the worn surface and reduces wear.
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| 关 键 词： | 热锻模具钢 CH95钢 高温磨损 氧化层 稀土元素 |
| 收稿时间： | 2005-03-19 |
| 修稿时间： | 2006-06-21 |
High temperature wear characteristics of a new hot work die steel CH95 |
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| CHENG Xianhua SHANGguan Qianqian WU Ju.High Temperature Wear Characteristics of a New Hot Work Die Steel CH95[J].Journal of Wuhan University of Technology. Materials Science Edition,2006,21(3):7-11. |
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| Authors: | Cheng Xianhua Ph D Shanguan Qianqian Wu Ju |
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| Affiliation: | (1) School of Mechanical Engineering, Shanghai Jiao Tong University, 200030 Shanghai, China |
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| Abstract: | High temperature wear characteristics of a new hot work die steel CH95 doped with a small amount of rare earth (Re) and boron (B) have been investigated and compared with those of conventional die steel H11 at a series of temperatures and loads. Worn surfaces of CH95 steel and H11 steel were analyzed with a scanning electron microscope. It is found that high temperature mechanical properties of CH95 steel are much better than those of H11 steel. The oxide layer formed on the worn surface plays an important role in wear resistance at high temperature. When the load is less than 63 N, the surface oxide layer keeps integrated and the effect of load on high temperature wear is small. When the load is higher than 63 N, the supporting ability of matrix to the oxide layer decreases with the increase of load, which results in an increase of wear rate. Compared with H11 steel, the wear resistance of CH95 steel is much better and the worn surface of CH95 steel is smoother. It is easier for CH95 steel to form a compact and integrated surface oxide layer at high temperature than for H11 steel, which protects the worn surface and reduces wear. |
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| Keywords: | CH95 steel high temperature wear load worn surface oxide layer |
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