作业帮英语翻译In addition,element V can make the solid solubility of c
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英语翻译
In addition,element V can make the solid solubility of carbon in austenite decrease,which increases the instability of austenite and make the Ms temperature rise,and further increase the tendency of martensite formation.Moreover,the morphology and distribution of carbides are improved,and the carbides become finer and uniform.The metallographic microstructures of the iron modified with 0% RE,0% V,0.3% Ti and 0% B,and 0% RE,0.4% V,0.3% Ti and 0.1% B are shown in Figs.1(e)
and 1(f).From Figs.1(e) and 1(f),it can be seen that the microstructure of high chromium cast iron is refined when B is added.According to the Fe-C phase diagram,the melting point is decreased because of the addition of B.Therefore,the number of carbide increases,and a lot of carbides containing
chromium are formed,which makes the content of Cr in austenite decrease and the Ms temperature rise.The instability of austenite decreases,and the formation of martensite becomes easer in the as-cast condition.A lot of carbides such as M7(C,B)3,M3(B,C),M23(B,C)6,and (Fe,Cr)B appear when B is added.The hardness of the material increases obviously because of solid solution strengthening of B.
In addition,element V can make the solid solubility of carbon in austenite decrease,which increases the instability of austenite and make the Ms temperature rise,and further increase the tendency of martensite formation.Moreover,the morphology and distribution of carbides are improved,and the carbides become finer and uniform.The metallographic microstructures of the iron modified with 0% RE,0% V,0.3% Ti and 0% B,and 0% RE,0.4% V,0.3% Ti and 0.1% B are shown in Figs.1(e)
and 1(f).From Figs.1(e) and 1(f),it can be seen that the microstructure of high chromium cast iron is refined when B is added.According to the Fe-C phase diagram,the melting point is decreased because of the addition of B.Therefore,the number of carbide increases,and a lot of carbides containing
chromium are formed,which makes the content of Cr in austenite decrease and the Ms temperature rise.The instability of austenite decreases,and the formation of martensite becomes easer in the as-cast condition.A lot of carbides such as M7(C,B)3,M3(B,C),M23(B,C)6,and (Fe,Cr)B appear when B is added.The hardness of the material increases obviously because of solid solution strengthening of B.
此外,第五元素可以使碳在奥氏体的固体溶解度降低,从而增加奥氏体的不稳定性,使温度上升,女士和进一步提高马氏体形成的趋势.此外,改善碳化物的形态和分布,以及碳化物变得更好和制服.铁的金相微观结构修改与再保险0%,0% V,0.3%的钛和0%的B,和0%的再保险,Ti V 0.4%,0.4%,0.4% B无花果.1所示(e)
和1(f).从无花果.1(e)和1(f),可以看出高铬铸铁的显微组织细化时,B是补充道.根据厂相图,添加的熔点降低,因为b .因此,碳化物数量的增加,大量的碳化物包含
铬形成,这使得Cr在奥氏体的含量减少和温升女士.奥氏体的不稳定性降低,形成铸态马氏体变得更便捷的条件.等大量的碳化物M7(C,B)3、M3(B,C),M23(B,C)6,(铁、铬)B B添加时出现.材料的硬度明显增加,因为固溶强化的B.
和1(f).从无花果.1(e)和1(f),可以看出高铬铸铁的显微组织细化时,B是补充道.根据厂相图,添加的熔点降低,因为b .因此,碳化物数量的增加,大量的碳化物包含
铬形成,这使得Cr在奥氏体的含量减少和温升女士.奥氏体的不稳定性降低,形成铸态马氏体变得更便捷的条件.等大量的碳化物M7(C,B)3、M3(B,C),M23(B,C)6,(铁、铬)B B添加时出现.材料的硬度明显增加,因为固溶强化的B.
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