A kind of wear-resistant surfacing welding anti-fatigue welding material on the surface of cement extrusion roller and its application

Abstract

The invention relates to an abrasion-resistant surfacing anti-fatigue welding material on the surface of a cement extrusion roller and application. According to the technical scheme, metal alloy powder containing Cr, C, Nb and Mn alloy elements is added in a surfacing material, and according to the surfacing metal component range (mass percentage), C=1.1-1.4%, Nb=4.0-5.8%, Cr=3.5-5.2%, Mn=0.8-1.0%, Si=0.6-0.9%, S<=0.025%, and P<=0.035%; and under the common arc surfacing condition, the micro structure of surfacing metal is high-carbon martensite, retained austenite, a small amount of austenite and NbC particles, wherein the volume fraction of the small amount of independent austenite ranges from 2% to 8%. According to the welding material product type, welding rods and flux-cored wires are used, and the welding rods are applicable to surfacing repairing of small defects on the surface of the extrusion roller and surfacing repairing of an abrasion-resistant layer on the whole roller surface; and the flux-cored wires are applicable to self-protecting or gas protecting arc surfacing, can also be used for submerged arc surfacing and can achieve automatic surfacing repairing of the extrusion roller and new extrusion roller manufacturing.

Description

Technical field [0001] The invention belongs to metallurgical processing technology and relates to a new wear-resistant surfacing and fatigue-resistant welding material on the surface of a cement squeeze roller. Its composition is different from existing welding materials and has good fatigue resistance. Background technique [0002] The roller press has the advantages of high efficiency, energy saving, small footprint, and convenient layout. It can form a variety of grinding processes with equipment such as break up classifiers, ball mills and powder concentrators to meet the product output and quality requirements of different cement production lines; Not only has it become one of the preferred solutions for the grinding system of a newly built large cement production line, it has also been widely used in the technical transformation of the grinding system of a cement plant. (Bao Wei, Wang Congjun. Application of Extrusion Grinding Technology in Technical Transformation of Ceme...

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Problems solved by technology

Compared with the commercially available electrode D667, its surfacing layer mainly depends on Cr 7 C 3 (1665HV) and other carbide strengthening, due to the large and brittle particles of the strengthening phase, it is easy to break and fall off during the wear process, so the crack resistance is poor and the wear resistance is not very good (Wang Xinhong, Zou Zengzeng, Song Sili, Qu Shiyao .TiC-VC non-preheating wear-resistant surfacing electrode[J].Welding Journal.2002,23(04):31-34)

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