| A novel large cross-section quenching and tempering mold steel matching excellent strength-hardness-toughness properties | |
| Liu, Hanghang1,2; Fu, Paixian1,2; Liu, Hongwei1,2; Sun, Chen1,2; Sun, Mingyue1,2; Li, Dianzhong1,2 | |
| Corresponding Author | Fu, Paixian(pxfu@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn) |
| 2018-11-08 | |
| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| ISSN | 0921-5093 |
| Volume | 737Pages:274-285 |
| Abstract | 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. |
| Keyword | A novel pre-hardened mold steel Strength-hardness-toughness Lower carbon content Rare earth Micro-alloying |
| Funding Organization | National Key Research and Development Program of China ; Cooperation Program of Hubei Province ; Chinese Academy of Sciences (The Research and Development of Key Technologies for Special Steel of Homogeneous High Performance) |
| DOI | 10.1016/j.msea.2018.09.046 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2016YFB0300401] ; Cooperation Program of Hubei Province ; Chinese Academy of Sciences (The Research and Development of Key Technologies for Special Steel of Homogeneous High Performance) |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000448493600032 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/130060 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Fu, Paixian; Li, Dianzhong |
| Affiliation | 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 |
| Recommended Citation GB/T 7714 | Liu, Hanghang,Fu, Paixian,Liu, Hongwei,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, Hanghang,Fu, Paixian,Liu, Hongwei,Sun, Chen,Sun, Mingyue,&Li, Dianzhong.(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, Hanghang,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. |
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