Effect of Nitrogen on Formation of Martensite-Austenite Constituent in Low Carbon Steels.
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- Staiger M. P.
- Department of Materials Engineering, Monash University
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- Jessop B.
- BHP Newcastle, Rolling Mills Technology, Long Products Division
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- Hodgson P. D.
- School of Engineering and Technology, Deakin University
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- Brownrigg A.
- BHP Research, Melbourne Laboratories
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- Davies C. H. J.
- Department of Materials Engineering, Monash University
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The effect of dissolved nitrogen on phase transformations and microstructural evolution in low-carbon high manganese silicon steel wire-rod was examined for varying nitrogen levels of 30, 70, and 100 ppm, while keeping the base composition constant. It was found that nitrogen suppresses the pearlite reaction start temperature by up to 30ºC. A strong correlation was discovered between the nitrogen level and the formation of martensite-austenite microconstituent (MA phase). The possible mechanisms by which nitrogen causes the formation of MA phase are discussed. The main conclusion drawn from this study is that levels of nitrogen between 70 and 110 ppm can have a significant effect on microstructure, such that up to approximately 10 vol% of MA phase is formed in these steels. Microstructural changes in titanium-microalloyed steels were also investigated-particularly changes in the development of the MA and pearlite phases. The pearlite content was up to double that found in a Ti-free alloy. Microalloying with titanium was found to be effective in completely eliminating MA phase.
収録刊行物
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- ISIJ International
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ISIJ International 39 (2), 183-190, 1999
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
- 1390001206452177792
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- NII論文ID
- 10002462360
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- NII書誌ID
- AA10680712
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- COI
- 1:CAS:528:DyaK1MXitFKgtb0%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