低炭素マルテンサイト系13Cr-Ni鋳鋼のじん性に関する研究

概要

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A study has been made of 13%Cr martensitic stainless cast steel containing 1% to 6%Ni as a function of hardness. The results were summarized as follows : (1) Toughness is raised with increased tempering temperature, exhibiting a maximum at around Ac1 temperature, and decreasing again at higher tempering temperature, while hardness changes inversely with toughness. (2) Upper shelf energy Em is a function of hardness. It is also a function of Ni content and tempering parameter P as expressed by the equation ; Em(kg-m)=−0.62Ni(%)+1.52P−13.92, where P=T(10+log t)×10−3 · (T : °K, t : hr). (3) Impact energy in the transition range is influenced by anstenite content and grain boundary embrittlement phenomena as well as by Ni content and tempering conditions.
Japan Foundry Engineering Societyの論文