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| Microstructure and Property Control of Small Rolling Bars of GH698 Alloy |
| LI Feng-yan, WANG Zhi-gang, WU Gui-lin, PAN Hui-jun |
| Technical Center, Fushun Special Steel Co., Ltd.��Fushun 113001, Liaoning, China |
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Abstract The problem of unqualified tensile property of small rolling bars of GH698 alloy (�ܦ�20 mm) at 750 �� was deeply investigated. The results show that for ��180 mm ingots melted with VIM+VAR, Mg content is controlled between 0.004% and 0.008%; the rolling deformation is controlled between 50% and 80%, and heating temperature is controlled between 1 140~1 180 ��, the alloy can get complete recrystallized grains of grade 2-6 after standard heat treatment, and the elevated temperature tensile property of the samples passes the initial test.
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Received: 29 March 2013
Published: 27 June 2014
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2014, Vol. 32 
