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Surfacing can be used to manufacture new parts , can also be used to repair damaged parts of the surface . The valve sealing surface surfacing , can improve the resistance to erosion of the valve sealing surface , resistant to corrosion, high temperature and anti-scratch performance , not only to reduce its production costs, but also improve the life of the valve . This article is based on a the 1Cr13 system valve surfacing electrode alloy system , by changing the slag system , the use of optical microscopy, hardness and abrasive wear testing machine analysis of the welding electrodes of different slag system process performance and surfacing layer organization , hardness and wear resistance , the development of two suitable for high pressure valve sealing surface of the new hardfacing electrodes . By comparing both the performance of the electrode obtained between the pros and cons to explore the elements of drug skin electrode process performance and surfacing layer microstructure, hardness and wear resistance , for the production and manufacture of provide some reference value . The results show that : both welding electrodes antioxidant , pores and cracks , slag removal and other process performance while overcoming the shortcomings of the existing welding slag thick improve electrode transitional efficiency , surfacing layer hardness 45 ~ 50HRC and good wear resistance . Main conclusions : 1) low hydrogen type electrode anti- oxidation and crack resistance , arc , especially poor and then arc , titanium calcium type electrode arc and arc stability , good and bad crack resistance ; poor low hydrogen type electrode slag coverage and slag removal and weld titanium calcium type electrode is better ; low hydrogen type electrode to the transition in the form of short-circuit , small spatter , but large amount of dust titanium calcium type electrode with a spray form transition spatter but smaller amount of dust . 2 ) at a low hydrogen type electrode , marble / fluorite value is the solution to the arc stability , spatter and slag fluidity key factor to adjust the content of fluorite can change the stability of the electrode . 3 ) of ferrosilicon , titanium and graphite deoxidizer beneficial to slag off , H , O in proportion electrode stomatal resistance and oxidation resistance has been strengthened . Part of the CaO MgO instead of using a low hydrogen type electrode slag removal greatly improved . 4) rutile titanium calcium type electrode is a major factor affecting the crack , its content is not too large , the ilmenite content should be appropriate , otherwise the content is too large will cause deterioration of pores and slag removal shortcomings .
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