井筒提升罐道表面的防护

Surface Protection of the Shaft Hoist Slide-way

首先在提升罐道轨道表面采用热喷焊技术获得F102B合金涂层,然后在其他暴露表面进行电弧喷涂铝,以解决矿井井筒提升罐道存在严重的磨损与腐蚀问题·应用X射线衍射(XRD)、电子显微分析(SEM、EPMA)技术对合金层作了研究·结果表明,该合金层组成相包括γ Ni、CrB、Ni3B、Ni3Si、(Cr,Fe)23C6和(Cr,Fe)7C3·在Ni Cr B合金系统中,γ Ni、CrB和Ni3B的质量分数分别约为67%,10%和23%·该合金层是以γ Ni为基体,其中均匀分布着柱状CrB、粒状(Cr,Fe)7C3、小球状Ni3Si以及其他网状混合物,CrB的长度为3～5μm,径向尺寸为2～2.5μm,(Cr,Fe)7C3和Ni3Si的径向尺寸分别为1 5～2 5μm和0.5～1.5μm·与20钢相比,该合金层的硬度、耐磨性分别提高2 5倍和2 7倍;经100℃,2h回火,F102B合金层的硬度提高14 6%,耐磨性提高17 5%,同时,耐蚀性也有所增强·

?F102 alloy was thermal spraywelded on the orbit surface firstly and then aluminum was electric arc spayed on the other exposed surface, concerning the serious corrosion and wear problem of the mine shaft slideway. F102B alloy coating has been investigated by Xray diffraction (XRD),scanning electron microscopy (SEM) and electron probe micro-analyzer (EPMA). The results show that the coating consists of γNi,CrB,Ni3B,Ni3Si,(Cr,Fe)23C6 and (Cr,Fe)7C3. There are w(γNi)=67%,w(CrB)=10% and w(Ni3B)=23% in the alloy system of NiCrB. The microstructure of the coating is composed of columnar CrB, granular (Cr,Fe)7C3, spherical Ni3Si and the other mixture well distributed in the matrix of γNi. The length of CrB is 3～5?μm and the diameters of CrB, (Cr,Fe)7C3 and Ni3Si are 2～25?μm, 15～25?μm and 05～15?μm respectively. Comparing to 20 steel, the hardness and antiwear performance of the coating rise 25 and 27 times respectively. After 100?℃,2?h tempering the hardness of the coating rises 146% and the antiwear performance rises 175%. Meanwhile, the anticorrosion performance increases too.