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电渣重熔20Mn1A钢中含有微量铝,可明显细化奥氏体晶粒,使钢在正火后获得均匀细小的铁素体加珠光体组织,从而显著地提高了钢的低温冲击韧性。
Electroslag remelting 20Mn1A steel containing trace amounts of aluminum, austenite grain refinement can be significantly, so that the steel obtained after normalizing ferrite plus pearlite microstructure, thus significantly improving the low temperature impact toughness of steel.