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| GRAIN COARSENING TEMPERATURE OF V-Ti-N MICROALLOYING STEELS |
| TANG Guoyi;ZHENG Yangzeng;CAI Qigong;ZHU Jing Yanshan University; Qinhuangdao; Hebei Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing TANG Guoyi; Department of Graduates; Central Iron and Steel Research Institute Ministry of Metallurgical Industry; Beijing 100081 |
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Cite this article:
TANG Guoyi;ZHENG Yangzeng;CAI Qigong;ZHU Jing Yanshan University; Qinhuangdao; Hebei Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing TANG Guoyi; Department of Graduates; Central Iron and Steel Research Institute Ministry of Metallurgical Industry; Beijing 100081. GRAIN COARSENING TEMPERATURE OF V-Ti-N MICROALLOYING STEELS. Acta Metall Sin, 1989, 25(6): 30-36.
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Abstract The effects of chemical composition and cooling rate after solidifi-cation on the grain coarsening temperature, T_(GC), of the V-Ti-N microalloying steelshave been investigated. It is shown that the T_(GC) may be obviously raised byadding even a little Ti to the base steels so as to precipitate a great deal of fineTi-bearing grains of about 10 nm. The T_(GC) does not increase with the cooling rate,as it is over a certain critical value. The T_(GC) is insensitive to any variation ofN content at simulated cooling condition of 150mm continuouscast slab. TheT_(GC) may be dropped down about 100℃ by adding 0.33 wt-% Mo to the steels.The sensitivity of T_(GC) to cooling condition is related with Ti and N contents.
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Received: 18 June 1989
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