A novel large cross-section quenching and tempering mold steel matching excellent strength-hardness-toughness properties
文献类型：期刊论文
| 作者 | Liu, HH; Fu, PX; Liu, HW; Sun, C1; Sun, MY; Li, DZ |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2018-11-08 |
| 卷号 | 737页码:274-285 |
| 关键词 | A novel pre-hardened mold steel Strength-hardness-toughness Lower carbon content Rare earth Micro-alloying |
| ISSN号 | 0921-5093 |
| DOI | 10.1016/j.msea.2018.09.046 |
| 英文摘要 | According to the synergistic effect of multiple elements, a novel large cross-section pre-hardened mold steel is designed with higher strength and hardness as well as toughness (HSTPM steel) compared with industrial high-end 718H steel during the normal tempering temperature range (530-650 degrees C). The achievements on the strength and hardness of HSTPM steel are attributed to the effects of 0.5 wt% molybdenum (Mo) and 0.1 wt% vanadium (V) additions on the matrix structure, including misorientation gradient, dislocation density, and nano-sized precipitates. The main strengthening precipitate (V, Mo)C was finely characterized by high angle annular dark field-scanning transmission electron microscope (HADDF-STEM) analysis. In addition, it was found that rare earth (RE) additions of 0.015 wt% in HSTPM steel highly effective in refining inclusions for changing the morphologies of strip MnS and Al2O3 to tiny spherical RE2O2S, and the number of coarse inclusions (diameter exceeding 5 mu m) is significantly decreased in the same statistical volume (4.69 x 10(8) mu m(3)) by three-dimensional X-ray microtomography statistical technique. The purification of molten steel and modification of inclusions by RE treatment are responsible for the improvement of impact toughness. Simultaneously, the lower carbon (C) content in HSTPM steel (high-end 718 H, 0.34 wt%; HSTPM, 0.23 wt%) also plays a large role in improving impact toughness. Finally, the synergistic effect of multiple elements delayed and eventually reduced the transformation range in pearlite compared with that in 718H steel. |
| 学科主题 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000448493600032 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79830]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, HH,Fu, PX,Liu, HW,et al. A novel large cross-section quenching and tempering mold steel matching excellent strength-hardness-toughness properties[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2018,737:274-285. |
| APA | Liu, HH,Fu, PX,Liu, HW,Sun, C,Sun, MY,&Li, DZ.(2018).A novel large cross-section quenching and tempering mold steel matching excellent strength-hardness-toughness properties.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,737,274-285. |
| MLA | Liu, HH,et al."A novel large cross-section quenching and tempering mold steel matching excellent strength-hardness-toughness properties".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 737(2018):274-285. |
入库方式： OAI收割
来源：金属研究所
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