Manufacturing technology of novel hobbing cutter with laser cladding WC wear-resistant coating
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A wear-resistant coating and laser cladding technology, which is applied in the coating process and coating of metal materials, can solve the problems of low TBM utilization rate and delay of excavation period, so as to improve wear performance, prolong service period, prevent Shedding effect
Active Publication Date: 2014-04-23
江苏点金激光科技有限公司
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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 tool
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Embodiment 1
[0019] A manufacturing process of a novel hob with laser cladding WC wear-resistant coating, the process steps are as follows:
[0020] (1) The hob is made by forging, and the material of the hob is alloy steel. The manufacturing process is as follows:
[0021] Electric furnace smelting→electroslag remelting→pre-forging→die forging→slow cooling→annealing→rough machining to obtain the rough blank of the hob cutter ring→high-temperature vacuum quenching of the rough blank of the cutter ring plus secondary high-temperature tempering→low temperature stress relief treatment→finishing →Inlaid carbide teeth;
[0022] (2) Peel and clean the surface to be processed between the alloy cutter teeth, and clean it with alcohol;
[0023] (3) Use a cross-flow CO2 laser, use SIMENS CNC machine tools as a workbench, and carry out cladding and wear-resistant strengthening treatment between the cutter ring and the cutter teeth. The spot diameter is 4-5mm, and the wear-resistant alloy powder is d...
Embodiment 2
[0033] A manufacturing process of a novel hob with laser cladding WC wear-resistant coating, the process steps are as follows:
[0034] (1) The hob is made by forging, and the material of the hob is alloy steel. The manufacturing process is as follows:
[0035] Electric furnace smelting→electroslag remelting→pre-forging→die forging→slow cooling→annealing→rough machining to obtain the rough blank of the hob cutter ring→high-temperature vacuum quenching of the rough blank of the cutter ring plus secondary high-temperature tempering→low temperature stress relief treatment→finishing →Inlaid carbide teeth;
[0036] (2) Peel and clean the surface to be processed between the alloy cutter teeth, and clean it with alcohol;
[0037] (3) Use a cross-flow CO2 laser, use SIMENS CNC machine tools as a workbench, and carry out cladding and wear-resistant strengthening treatment between the cutter ring and the cutter teeth. The spot diameter is 4-5mm, and the wear-resistant alloy powder is d...
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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...
Claims
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