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EVALUATION METHOD FOR HIGH TEMPERATURE EMBRITTLEMENT OF CONTINUOUSLY CAST SLAB AND CONTINUOUS CASTING METHOD FOR STEEL
EVALUATION METHOD FOR HIGH TEMPERATURE EMBRITTLEMENT OF CONTINUOUSLY CAST SLAB AND CONTINUOUS CASTING METHOD FOR STEEL
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机译:连铸坯的高温锻造评价方法及钢的连铸方法
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摘要
PROBLEM TO BE SOLVED: To provide an evaluation method for high temperature embrittlement which can make an exact evaluation through measurement using a small number of test specimens in a short period of time, and also to provide a continuous casting method which enables manufacturing of slabs free from lateral crack by using the evaluation method.;SOLUTION: The high temperature embrittlement evaluation method of continuously cast slabs is used to evaluate occurrence of lateral crack on continuously cast slabs. A lateral crack susceptibility of slabs is evaluated based on a crack generation critical strain measured in advance by using specimens which have the same steel kind and the same chemical composition with those of slabs under casting and have such a specimen profile as to induce a variety of strain levels by one compression test. Under the continuous casting method, while casting the steel using the continuous caster, a surface temperature of slab at the bending section or the straightening section of the caster is controlled within such a temperature range that the crack generation critical strain measured by the high temperature embrittlement evaluation method stays at 5% or more.;COPYRIGHT: (C)2009,JPO&INPIT
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