Property optimization in as-quenched martensitic steel by molybdenum and niobium alloying

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Abstract

Niobium microalloying is the backbone of modern low-carbon high strength low alloy (HSLA) steel metallurgy, providing a favorable combination of strength and toughness by pronounced microstructural refinement. Molybdenum alloying is established in medium-carbon quenching and tempering of steel by delivering high hardenability and good tempering resistance. Recent developments of ultra-high strength steel grades, such as fully martensitic steel, can be optimized by using beneficial metallurgical effects of niobium and molybdenum. The paper details the metallurgical principles of both elements in such steel and the achievable improvement of properties. Particularly, the underlying mechanisms of improving toughness and reducing the sensitivity towards hydrogen embrittlement by a suitable combination of molybdenum and niobium alloying will be discussed.

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CITATION STYLE

APA

Mohrbacher, H. (2018, April 1). Property optimization in as-quenched martensitic steel by molybdenum and niobium alloying. Metals. MDPI AG. https://doi.org/10.3390/met8040234

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