电渣重熔速度对H13钢组织和冲击性能的影响

来源期刊：钢铁2010年第8期

论文作者：马党参 周健 张忠侃 迟宏宵 陈再枝

文章页码：80 - 84

关键词：电渣重熔； H13； 显微组织； 枝晶； 冲击性能

Key words：electroslag refining(ESR)； H13； microstructure； dendrite； impact property

摘    要：利用双极串联电极坯电渣重熔直径φ385mm H13钢锭,研究了快速重熔与慢速重熔对电渣锭的铸态组织、锻造成品的退火组织和冲击性能的影响。结果表明:快速重熔比慢速的电渣锭的二次枝晶间距大,并且一次碳化物等枝晶间显微偏析严重;慢速重熔的锻造成品的退火组织均匀和带状偏析减轻,横向冲击性能明显提高,达到NADCA207-90标准规定的优质H13钢的水平。

Abstract: Double electrode series technology was adopted to electroslag remelting for φ385mm diameter ingot of H13 steel,and effect of the quicker melting rate and slower melting rate on the as-cast structure of ESR ingot,annealing microstructure,banding segregation and impact properties of forging products was investigated.The results show that the secondary dendrite arm spacing of ingot increases and primary carbides and others interdendritic microsegregation are more serious by the quicker melting rate than that by slower melting rate.The annealing microstructure are more uniform,the banding segregation alleviates,the transversal impact toughness is improved obviously of the forging products by the slower melting rate than that of the quicker melting rate and come up to the standard of high-quality steel H13 level stipulated by NADCA207-90.