| At present, the machinery parts used in engineering application, wear and corrosion are the main forms of failure. The service life and work efficiency of machinery parts decline were because of wear and corrosion. At the same time, some high precision parts were eliminated because of local wear and corrosion, resulting the material seriously waste. Especially,with the development of modern industry. A large number of engineering parts in the complex work environment of high temperature and high pressure. The service life of mechanical parts was reduced by the surface wear and corrosion. The production efficiency was influenced seriously.The lack of resources, repairing the wear failure of parts and prolonging its service life have become more and more urgent. Which caused the attention of scientific experts and scholars.The parts was repaired and properties of metal materials was improved by the surface strengthening technology. There are rod arc welding, submerged arc welding, argon arc welding method. In this paper, the iron-base alloy was cladded to the surface of Q235B steel by tungsten electrode argon arc Surfacing technology, the good wear resistant performance of layer was obtained. Compared with the conventional argon arc welding, the alloy powders were coated on the steel plate directly). The iron-base alloy powders were prepared by the requirement, then mixed, pressed and formed, dried,etc. The certain size of iron-base alloy sheet was formed, the iron-base alloy sheets were cladded to the steel plate, improving the surface performance. This simple and low cost property process which was applicated in the reproduction.The FeCrC, FeCrBC, FeCrBVC iron-base alloy were deposited to the surface of Q235B steel by the argon arc surfacing technology in this paper. The good cladding layer was obtained.The organization and performance were analysised by using the SEM, XRD and other experimental technique. The experimental results showed that, The good alloy cladding layer of no blow hole, slag inclusion, cracks was obtained, and the uniform distribution of hard phase was formed in cladding layer.The performance of cladding layer was effected by the various organization forms. The organization of matrix was mainly composed of pearlite, ledeburite. The cladding layer of FeCrC mainly was Cr23C6,Cr7C3,Cr3C2. After added the B elements,(Fe, Cr)23C6,(Fe,Cr,B)C and other composite compounds were appeared in cladding layer. The compounds forms, particle size and distribution were changed with different of content B and C. The vanadium element was added to FeCrBC alloy, there is a good performence of cladding layer. The form of carbides organization have circular particle,thin strips, and square. The (Fe,Cr)C and (Fe,Cr,V)C complex compounds were appeared in the cladding layer.The dry friction experiment of FeCrC, FeCrBC, FeCrBVC alloys cladding layer were investigated by the M-2000wear testing machine. The dry friction experiment result showed that, the wearing capacity of FeCrBVC alloy cladding layer is better than FeCrBC and FeCrC alloy. The performance of the alloy cladding layer was influenced by the elements of Cr, C, B, V. The results showed that, the cladding layer easily was cracked because of the excessive amounts of C and B, and wear resistance was reduced. The Cr element is benefit to the formation of welded joint. While, there have difficulty when the V elements excess.There are best abrasion-resistance when FeCrBVC alloy composition is Cr (35%), V (10%), B (1%), C (0.5%).The surface corrosion rate of FeCrC, FeCrBC, FeCrBVC alloy cladding layer was measured by electrochemical corrosion experiment. The results showed that, the three kinds alloys cladding layer are higher than the matrix metal. The FeCrBVC cladding layer has the best corrosion resistance in three kinds of alloy, when the addition amount of Cr35%,C0.5%, B0.5%, V10%. The corrosion resistance of cladding layer was largly influnenced by the content of Cr and C. The corrosion resistance of cladding layer will be improved with the increasing of Cr and with the decreasing of C. |
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