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我厂每年生产的ZG1 Cr13、ZG2 Cr13、ZG3 Cr13不锈钢叶轮品种多,产量大。 众所周知,含13％铬的不锈钢是一种马氏体不锈钢,不论砂型铸造,还是熔模精密铸造常产生裂纹。ZG3 Cr13钢由于含碳量高,又比ZG1 Cr13、ZG2 Cr13钢裂纹倾向更大。往往因裂纹而报废的竟高达61％。 ZG3 Cr13叶轮的裂纹,在毛坯状态时不易发现,精加工后就暴露出来。这是一种长度为30～100毫米的穿透性裂纹。从断口分析可见是一种典型的脆性“石状”断口。
I plant annual production of ZG1 Cr13, ZG2 Cr13, ZG3 Cr13 stainless steel impeller varieties, large output. As we all know, 13% chromium stainless steel is a martensitic stainless steel, whether sand casting, casting or casting often crack. ZG3 Cr13 steel due to high carbon content, but also more than ZG1 Cr13, ZG2 Cr13 steel cracks tend to be greater. Often up to 61% because of cracks and scrapped. ZG3 Cr13 impeller crack, not easy to find in the rough state, after finishing exposed. This is a penetration crack of 30 to 100 mm in length. From the fracture analysis shows that it is a typical brittle “stone-like” fracture.