Machining technology of mud pump shaft bearing sleeve

Abstract

This invention provides a machining technology of a mud pump shaft bearing sleeve. The machining technology is mainly composed of a forging procedure of the bearing sleeve, the cooling procedure performed after forging and the thermal treatment procedure of a machined semi-finished product. The procedures include the following steps that the initial forging temperature of 4Cr13 used for manufacturing the bearing sleeve is controlled between 1100-1150 DEG C, the final forging temperature is controlled at 880 DEG C, the charging temperature of blanks is lower than 400 DEG C, heating is slow before the temperature reaches 850 DEG C, and then, the temperature is fast raised to the initial forging temperature; a bearing sleeve casting is placed in a furnace with the temperature being 200 DEG C or so or in an asbestos heat-preserving box to be cooled, or the bearing sleeve casting is placed in a furnace with the temperature being 600 DEG C so that the heat can be preserved and the bearing sleeve casting is cooled along with the furnace; the bearing sleeve casting is placed in a quenching furnace and heated to 1000-1050 DEG C, when the pre-heating temperature reaches 400 DEG C, the temperature is slowly raised to 850 DEG C, then, the temperature is fast raised to quenching temperature, a semi-finished bearing sleeve is placed into a tempering furnace to be heated after quenching ends, and the tempering temperature is controlled between 200-250 DEG C. The bearing sleeve manufactured through the machining technology is high in strength and abrasion resistance, and the service life of the bearing sleeve is prolonged.

Description

Technical field [0001] The invention relates to a processing technology of a bearing sleeve, in particular to a processing technology of a mud pump shaft bearing sleeve. Background technique [0002] The mud pump shaft bearing sleeve is usually made of martensitic stainless steel 4Cr13, and its composition is composed by weight percentage: 0.3-0.45% C, ≤0.6% Si, ≤0.8% Mn, ≤0.035% P, ≤0.030% S, 12-14% Cr. This kind of bearing sleeve is made through five steps: blanking, press casting, surface quenching, tempering and grinding forming. The bearing sleeve manufactured by this method is in actual use. If the surface of the workpiece is locally affected by the induction process If the induction time is long or the surface is not in place during the subsequent fine grinding process, the bearing sleeve will be worn out in a short time and cannot be used after the surface is damaged during use. Summary of the invention [0003] The invention proposes a processing technology for a mud pu...

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Problems solved by technology

[0003] The invention proposes a processing technology of the mud pump shaft bearing sleeve, which solves the problems that the bearing sleeve is easy to wear and the like

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