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含硼钢铁材料在农机、矿机中的广阔应用前景与正确认识和确定硼在Fe_a(C_(1-x),B_x)中的固溶度密切相关。研究表明:Fe-C-B合金在1050℃加热后,其中Fe_3(C_(1-x),B_x)的x最大范围为0.05～0.90。当Fe_3(C_(1-x),B_x)与γ-Fe共存时,随合金含B量的增加和(或)含C量的减少,x=0.05～0.90,Fe_3(C_(1-x),B_x)的晶格常数α和c减小1.5％,b增大6.5％,它的显微硬度从1020HV增加到1360HV。当Fe_3(C_(1-x),B_x)与γ-Fe、石墨和Fe_2B之中的两个相共存时,x值及晶格常数和显微硬度分别有一固定值。
The broad application prospect of boron-containing steel materials in agricultural machines and mining machines is closely related to the correct understanding and determination of the solid solubility of boron in Fe_a (C_ (1-x), B_x). The results show that the maximum range of x of Fe_3 (C_ (1-x), B_x) is 0.05 ~ 0.90 after the Fe-C-B alloy is heated at 1050 ℃. When Co_ (C_ (1-x), B_x) and γ-Fe coexist, with the increase of alloy B content and / or decrease of C content, x = 0.05-0.90 and Fe_3 (C_ (1-x) , B_x) decreases the lattice constants α and c by 1.5% and b increases by 6.5%. The microhardness increases from 1020 to 1360 HV. When Fe_3 (C_ (1-x), B_x) coexist with two phases of γ-Fe, graphite and Fe_2B, the values of x, lattice constant and microhardness have a fixed value respectively.