h  Medium-speed coal mill abrasion resistance (mainly high chromium cast iron roll grinding and disc) wear constantly in the process of grinding pulverized coal, the failure mainly in the form of the friction loss of the coal against the wear and tear of the three-body abrasion, the wear mainly hard particles in the coal against the wear surface caused by micro-cutting, crushing and spalling of the furrows of plastic deformation, and carbides; wear mechanism of micro-cutting wear, plastic fatigue wear of brittle fracture and spalling wear three mechanisms coexist, but the micro-cutting wear.
 

In order to ensure that the output of medium-speed coal mill, high chromium cast iron anti-wear parts requiring regular inspection, adjustment, repair or replace. Flux Core Welding Wire automatic welding to repair the economic and social benefits of waste high chromium cast iron wear-resistant, self-shielded flux cored wire automatic welding open arc automatic welding performance integrated gradually replace the automatic submerged arc weld surfacing development the tide of domestic supporting the quality and types of self-shielded flux cored wire obviously can not meet the medium-speed coal mill due to the unprecedented growth of electric power construction, anti-wear parts spare parts tension.
 

For medium-speed coal mill high chromium cast iron wear-resistant parts wear failure mechanism, developed by the excellent performance of the two welding processes, welding layer has high hardness and high wear resistance of multicomponent alloys to strengthen self-shielded Welding Wire China, and on the development of wire self-protection mechanism and surfacing storey wear resistance of the reasons were discussed.