Effect of Rare Earth Metals on the Microstructure and Impact Toughness of a Cast 0.4C-5Cr-1.2Mo-1.0V Steel.
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- Lan Jie
- School of Materials Science and Engineering, Shanghai Jiao Tong University
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- He Junjie
- School of Materials Science and Engineering, Shanghai Jiao Tong University
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- Ding Wenjiang
- School of Materials Science and Engineering, Shanghai Jiao Tong University
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- Wang Qudong
- School of Materials Science and Engineering, Shanghai Jiao Tong University
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- Zhu Yanping
- School of Materials Science and Engineering, Shanghai Jiao Tong University
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Die-making technology directly produced by precise casting technology such as investment and ceramic casting method was a promising technology due to its lower manufacture cost and shorter period in comparison with traditional die-making technology. However, the poor mechanical performance of cast materials, especially low impact toughness, was a main obstacle to the application of cast dies and molds.<br>With a view to improve the impact toughness of CH13 steel (0.4C–5Cr–1.2Mo–1V steel), which was ever used to cast dies for die casting dies, rare earth was added into CH13 steel in our research. It was shown that the dendrite microstructure in CH13 steel had been ameliorated and the segregation ratios of alloying elements were decreased greatly after the addition of rare earth. Grain boundary carbides in MCH13 (CH13 + rare earth) steel had also been inhibited. The impact toughness of MCH13 steel had been improved considerably and the fractography of MCH13 displayed more plastic characteristic. Through thermodynamics and two-dimensional lattice disregistry analysis, it was demonstrated that rare earth inclusions in MCH13 steel act as the heterogeneous nuclei, weaken segregation of alloying elements and improve the impact toughness.
収録刊行物
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- ISIJ International
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ISIJ International 40 (12), 1275-1282, 2000
一般社団法人 日本鉄鋼協会
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詳細情報 詳細情報について
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- CRID
- 1390282681430775040
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- NII論文ID
- 10004838045
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- NII書誌ID
- AA10680712
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- COI
- 1:CAS:528:DC%2BD3MXoslWhsQ%3D%3D
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- ISSN
- 13475460
- 09151559
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- 本文言語コード
- en
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- データソース種別
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- JaLC
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- 使用不可