Wear resistant and anti-fatigue surfacing electrode

Abstract

The invention discloses a wear resistant and fatigue resistant surfacing welding electrode which has an H08Mn or H08MnA welding wire as a welding core and is characterized by the components of the electrode coating of the electrode by weight percent: 10 to 20 percent of marble, 5 to 10 percent of fluorite, 2 to 4 percent of quartz, 5 to 10 percent of titanium ore, 2 to 4 percent of chalkstone, 10 to 25 percent of nitrided ferrochromium, 20 to 30 percent of metal manganese, 10 to 20 percent of nitrided ferromanganese, 5 to 10 percent of ferrotungsten and 1 to 3 percent of rare earth ferromagnesian alloy; and also is characterized by using sodium silicate as a binder. The chemical components of the melting cladding layer material of the surfacing welding comprise 15 to 17 wt percent of Mn, 4 to 6 wt percent of Cr, 2 to 4 wt percent of W, 0.08 to 0.20 wt percent of N, 0.2 to 0.4 percent of C, small amount of Re, less than 0.1 wt percent of impurities and the rest is iron. When using the electrode for the surfacing welding, a DC welding machine is adopted and the electrode is used as a cathode. The obtained cladding layer of the surfacing welding is a single-phase austenite structure with the rigidity of 220 to 260HB and has excellent capability of processing rigidification and excellent performances of rolling contact fatigue resistance and wear resistance, and can obviously lengthen the service life of wearing and fatigue parts after repairing.

Description

technical field [0001] The invention relates to a surfacing welding electrode, in particular to a wear-resistant and anti-fatigue surfacing welding electrode. Background technique [0002] The main failure form of railway frogs is fatigue spalling and wear at the position of the fork core, and the repair method is repair welding on site. At present, the surfacing electrodes used in the repair welding and repair of railway frogs mainly include high manganese steel series, Cr-Ni-Mo series, Mn-Cr series and Cr-Mn-N series and so on. Among them, the main grades used in my country are surfacing electrodes for high manganese steel series such as Heap 256, Heap 266, Heap 276 / 277 and KD286 according to the order of time when they are put into use. At present, KD286 is the most widely used in our country. The chemical composition of its cladding layer material is: C<0.3, Mn20-25, Mo1-2, Cr0.5-1.0. In addition, there are some public patent technologies, such as: Chinese Patent (P...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing welding rods, such as high production cost and influence on popularization, the present invention provides a wear-resistant and anti-fatigue surfacing electrode, which has excellent work hardening ability and can significantly prolong wear and fatigue Service life of parts after repair