A laser alloying method for the surface of heavy-duty gears on offshore platforms

Abstract

The invention provides a laser surface alloying method for heavy-duty gears of marine platforms. The method includes: performing gear surface laser micro-texturing, preparing nickel-based abrasion-resistant alloy powder, performing liquid nitrogen cryogenic reaming, laying the nickel-based abrasion-resistant alloy powder in a reamed microtexture area, and subjecting the microtexture area to laseralloying, laser quenching, microtexture area hardness, abrasion resistance and friction coefficient detection and optimization. By a series of processes, laser alloying is performed after gear surfacemicro-texturing; due to adding of abrasion-resistant elements in uniform distribution in the laser alloying process, hardness and abrasion resistance of gear surfaces and gear portions in different depths are effectively enhanced; and service lives of the gears are prolonged.

Description

technical field [0001] The invention belongs to the technical field of laser processing, and in particular relates to a method for laser alloying the surface of a heavy-duty gear on an offshore platform. Background technique [0002] The laser surface micro-texturing process has been proven to be a means to effectively improve the friction and wear properties and bearing capacity of the material surface. In recent years, more and more attention has been paid to the surface modification technology by processing a series of array micropatterns on the friction pair. Moreover, the micro-pits on the surface of the laser micro-textured substrate are steep, and a bonding strengthening mechanism is introduced at the interface after powder coating, and the interfacial bonding strength is significantly improved. [0003] Laser Surface Alloying (LSA) is a new method for local modification of the surface of metal materials, and the laser alloying process belongs to the category of mate...

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Problems solved by technology

However, the above two methods only carry out micro-texture treatment on the surface, and the hardness or wear resistance of the gears produced by these two methods cannot meet the requirements of heavy-duty gears for offshore platforms.

[0006] The patent application number published in 2012 is CN201210109126.3, and the patent name is a micro-embedded self-lubricating texture on the surface of gears and cams and its preparation method. structure processing, and then use the forming bonding technology of self-lubricating composite materials to press-fill the solid lubricant into the micro-texture on the surface of the gear and the cam; on the basis of the micro-texture, the solid lubricant is embedded to improve the anti-friction effect , but the patent does not substantially enhance the wear resistance of the gear surface

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