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对工业试制10CrNi3Mo薄板的力学性能、断口形貌和组织进行观察。结果表明,采用NiCrMo合金成分设计,10CrNi3Mo薄板具有较高的强度和良好的低温韧性;在-100℃处出现稳定的上平台,韧脆转变温度约为-160℃。试验钢经调质热处理后的组织为回火马氏体,在板条束和晶界上分布着大量析出物,对钢的强度和韧性有提高作用。
The mechanical properties, fracture morphology and microstructure of 10CrNi3Mo sheet were observed. The results show that 10CrNi3Mo thin plate has high strength and good low temperature toughness with NiCrMo alloy composition. The stable upper plateau appears at -100 ℃, and the ductile-brittle transition temperature is about -160 ℃. The microstructure of the test steel after quenched and tempered is tempered martensite, and a large amount of precipitates are distributed on the lath and grain boundaries of the slab, which enhances the strength and toughness of the steel.