薄板坯连铸连轧低合金耐磨钢磨料磨损特性

 研制了30CrMo，50CrV4两种牌号的薄板坯连铸连轧低合金耐磨钢板，对试验钢板进行淬火和低温回火热处理，并且与传统热轧工艺生产的热轧态的45，16Mn，Q235钢对比进行低应力磨料磨损试验，研究其磨损特性。结果表明，淬火低温回火态薄板坯连铸连轧30CrMo，50CrV4钢的相对耐磨性都达到了热轧Q235钢的1.6倍以上。在低应力磨料磨损下，显微切削机制为主要磨损机制，淬火回火态薄板坯连铸连轧低合金耐磨钢具有高硬度因而具有较好的耐磨性能，并在试验钢板硬度高于450HBW以后相对耐磨性明显提高。对比两种牌号的薄板坯连铸连轧低合金耐磨钢的显微组织、硬度、韧性及耐磨性能，30CrMo钢的综合性能较好。50CrV4钢耐磨性能较好，但其冲击韧性较低。

Abrasion Characteristic Research of Thin Slab Continue Casting and Rolling Low Alloy Wear-Resistant Steel

30CrMo, 50CrV4 thin slab continue casting and rolling low alloy wear-resistant steel were designed. After quenching and low temperature tempering, the abrasion characteristic was researched by low stress abrasion test, and was compared with 45, 16Mn, Q235 steel. The results show that the relative wear resistance of quenched and tempered 30CrMo, 50CrV4 steel specimens is more than 1.6 times hot rolled Q235 steel. In the low stress abrasion condition, micro cutting mechanism is the main wear mechanism, quenched and tempered thin slab continue casting and rolling low alloy wear-resistant steel has good wear resistance because of its high hardness. The relative wear resistance can be improved significantly when the hardness of the test steel plate is higher than 450HBW. In low stress abrasive wear condition, 30CrMo steel shows the best overall performance taking the microstructure, mechanical properties and wear resistant of the two kinds of thin slab continue casting and rolling low alloy wear-resistant steels into account. 50CrV4 steel also shows good wear resistant and extreme low impact toughness.