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ZG20Cr钢加钒微合金化及用稀土舍金孕育,在保证塑性、韧性不下降的情况下,屈强比σ_a/σ_b有大幅度提高。并使其断裂韧性、小能量多次冲击弯曲抗力、耐磨性能、铸造性能等有明显改善。在唐山吕家坨煤矿、山东招远金矿、江苏韦岗铁矿分别对ZG20CrVRe钢精铸钎卡与锻造钎卡进行了装机对比试验,证明精铸钎卡综合性能均超过了锻造钎卡,并具有广泛的推广价值。
ZG20Cr steel plus vanadium micro-alloying and rare earth homes pregnant, in ensuring the plasticity, toughness does not decline, the yield ratio σ_a / σ_b have greatly increased. And make its fracture toughness, small energy multiple impact bending resistance, wear resistance, casting performance, etc. have been significantly improved. ZG20CrVRe steel castings and forging brazing cards were compared with each other respectively in the Lujiatuo Coal Mine in Tangshan, Zhaoyuan Gold Mine in Shandong and Weigang Iron Mine in Jiangsu Province, which proved that the overall performance of casting cast brazing card exceeded that of forging brazing cards, And has a wide range of promotional value.