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| AN INVESTIGATION OF ROCK-LIKE FRACTURE OF 18Cr2Ni4WA |
| Yeh Li Resarch Institute of Tayeh Steel Works |
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Cite this article:
Yeh Li Resarch Institute of Tayeh Steel Works. AN INVESTIGATION OF ROCK-LIKE FRACTURE OF 18Cr2Ni4WA. Acta Metall Sin, 1977, 13(3): 187-249.
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Abstract The steel (18Cr2Ni4WA) melted by three different processes and deoxidized eitherwith aluminium and titanium or with aluminium alone has been studied in order to clar-ify the cause of its rock-like fractography. It is believed that such rock-like fracture isconnected with the sensibility of over-heating of the steel. Conditions render this steelsensible to over-heating are: (1) the over-growth of austenite grains on heating at hightemperatures; (2) the precipitation of fine manganese sulphide inclusions at the austen-ite boundaries. It is considered that small amounts of residual titanium left over afterdeoxidation may retard the growth of austenite grains as well as modify the mode anddistribution of the fine manganese sulphide inclusions, thus reducing the sensibility toover-heating of the steel.
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Received: 18 March 1977
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