Influence of heat treatment on microstructure and properties of GX12CrMoVNbN9-1 cast steel
Journal Title: Archiwum Odlewnictwa - Year 2010, Vol 10, Issue 3
Abstract
The paper presents results of research on the influence of multistage heat treatment on microstructure and properties of high-chromium martensitic GX12CrMoVNbN9 – 1 (GP91) steel. The material under investigation were samples taken out from a test coupon. Heat treatment of GP91 cast steel was performed at the parameters of temperature and time typical of treatment for multi-ton steel casts. The research has proved that in the as-received condition (as-cast state) GP91 cast steel was characterized by a coarse grain, martensitic microstructure which provided the required standard mechanical properties. The heat treatment of GP91 cast steel contributed to obtainment of a fine grain microstructure of high tempered martensite with numerous precipitations of carbides of diverse size. The GP91 cast steel structure received through heat treatment made it possible to obtain high plastic properties, particularly impact strength, maintaining strength properties on the level of the required minimum.
Authors and Affiliations
G. Golański
Keywords
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