Influence of Aluminium on Hardenability of High Nitrogen 18CrMnB Steels
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摘要: 用顯微徑跡照像法研究了870℃端淬時鋼中硼的分布和氮的固定情況,并用Cβ參量表示鋼中氮被固定的程度。結果表明,Cβ值越大,淬透性越好,核參量很好地控制高氮18CrMnB鋼的淬透性。Cβ=14.5-27.5,可保證試驗鋼種有高而穩定的淬透性。Abstract: The distribution of B and N in 18CrMnB steel during the hardening at 870℃ is investigated by means of the microphotography, and CB is used as a parameter to show the distribution of N in the steel. The results obtained are as follows: the hardenability increases with parameter Cβ, and if its value is between 14.5 though 27.5, the high hardenability of 18CrMnB steel is obtained. Cβ is a useful parameter for controlling the hardenability of this steel.
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Key words:
- hardenability /
- half-martensite distance /
- parameter Cβ
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