含Y2O3电渣重熔渣系对CLAM钢组织及力学性能的影响

利用光学显微镜、扫描电镜、X射线衍射仪、透射电镜等分析手段研究了不同含Y2O.渣系对Y-CLAM钢组织和性能的影响.结果 表明:相比于70CaF2-30Y2O3渣系电渣重熔后的Y1-CLAM钢,经40CaF2-30CaO-30Y2O3渣系电渣重熔后的Y2-CLAM钢具有更高质量分数的Y,即适度提高渣系中CaO质量分数可...

Effect of Y2O3 bearing ESR slag on microstructure and properties of CLAM steel

The effects of different Y2O3 bearing slags on the microstructure and properties of Y-CLAM steel were studied by means of optical microscopy, scanning electron microscopy, X ray diffractometry and transmission electron microscopy. The results show that, compared with the Y1 CLAM steel electroslag remelted by 70CaF2-30Y2O3 slag, the Y2-CLAM steel after 40CaF2 30CaO-30Y2O3 slag electroslag remelting has a higher mass fraction of Y, that is, moderate increasing the mass fraction of CaO in the slag can increase the yield of Y element in Y-CLAM steel; under the same heat treatment system, both Y1-CLAM steel and Y2-CLAM steel are tempered martensite structures; The grain size, tensile strength, yield strength and elongation of the two experimental steels are similar, but the room temperature impact energy of Y2-CLAM steel is significantly higher than that of Y1-CLAM steel; The ductile brittle transition temperature (DBTT) of Y2-CLAM steel is 12℃ lower than that of Y1-CLAM steel.