Manufacturing technology of novel hobbing cutter with laser cladding WC wear-resistant coating

Abstract

The invention relates to a manufacturing technology of a novel hobbing cutter with a laser cladding WC wear-resistant coating. The manufacturing technology comprises the following steps: (1) manufacturing the hobbing cutter with a forging method, wherein the hobbing cutter is made of alloy steel; (2) carrying out peel removal cleaning treatment on surfaces to be machined of the intertooth space of an alloy cutter; (3) using a transverse flow CO2 laser, taking a numerical control machine tool as a workbench, and carrying out cladding wear-resistant strengthening treatment on the intertooth space of a cutter ring cutter, wherein the thickness of the WC cladding layer is 1.5-2.5mm; (4) carrying out performance detection on a composite coating. A laser surface cladding technology is adopted, and the tissues of a cladding coating mainly consist of carbides and a supersaturated solid solution superfine casting-state structure, wherein spherical tungsten carbide ceramics are of ultra-high hardness and uniformly distributed on a binding phase with extremely high hardness level, and also achieves an inhibition effect on abrasion, and the grinding resistance between hobbing cutter edges can be effectively improved; the binding phase is good in tenacity and high in strength, the formation of cracks can be effectively reduced, and the wear resistance and corrosive resistance of the hobbing cutter is improved, and the service life of the hobbing cutter is prolonged.

Description

technical field [0001] The invention relates to the field of manufacturing a novel hob, in particular to a manufacturing process of a novel hob with a laser cladding WC wear-resistant coating. Background technique [0002] Disc hob is the excavating tool of full-face rock tunnel boring machine (TBM). The basic components are composed of cutter ring, cutter body, cutter shaft, bearing, sealing ring, end cover and other components. The working parts of the medium-breaking rock are also the most severely worn parts. The impact and wear of the disc-shaped hob during the rock-breaking process is severe, resulting in the normal wear of the hob accounting for more than 90% of all tool failures. In addition, tool wear has an important impact on the cost of TBM construction, the speed and efficiency of tunneling, so it is an important link in the study of TBM tunneling performance. The cost of cutting tools occupies a considerable proportion in the construction cost of TBM. For exa...

AI Technical Summary

Problems solved by technology

The cost of cutting tools occupies a considerable proportion in the construction cost of TBM. For example, in the construction of Qinling Tunnel in my country, the cost of cutting tools accounts for about 1 / 3 of the cost of tunneling construction, and the frequent replacement of hobs will also delay the construction period of tunneling, thus making TBM less usage of