A method for controlling the water content of nitrate salt for quenching bearing parts

Abstract

A method for controlling the water content of nitrate salt for quenching bearing parts of the present invention relates to the field of bearing production and processing, comprising the following steps: S1, measuring the consumption rate of water in the quenching nitrate tank by testing, and the consumption rate is denoted as D; S2 , according to the described consumption rate multiplied by the duration of a working step cycle, calculate the replenishment amount to the quenching nitrate tank in each working step cycle, the duration of the described one working step cycle is denoted as ΔT, and the replenishing water amount Recorded as M1, M1=D*△T; S3, in the actual quenching process, add water to the quenching nitrate tank according to the water replenishment amount in each step cycle, and stir the nitrate in the quenching nitrate tank Salt and water to mix them evenly. The invention can reduce the fluctuation of the nitrate water content in the quenching process of the bearing parts, and improve the quenching quality of the bearing parts.

Description

Technical field [0001] The present invention relates to the field of bearing production and processing, and more particularly to a water content control method for quenching a bearing part quenching. Background technique [0002] For stick furnaces such as stick furnace, box furnace, mesh furnace, usually using nitric salts for quenching media, bearing parts, the bearing parts, the use of oil quenching can improve the hardenability of the product, and the nitric salt is more suitable. In carrying out a large-scale bearing quenching process, a certain amount of water is added to the nitrogen, and the cooling characteristics of the quenching salt can be added more. The moisture content in the nitroid is directly affected by the cooling speed of the nitric salts. When the moisture content has a large fluctuation, the physical and chemical properties of the bearing part will have a lot of fluctuations, affect the subsequent processing and service life of the product. Since the nitric...

AI Technical Summary

Problems solved by technology

The moisture content in the nitrate directly affects the cooling rate of the nitrate. When the moisture content fluctuates greatly, the physical and chemical properties, metallographic structure and deformation of the bearing parts will fluctuate greatly, which will affect the subsequent processing and service life of the product.

Due to the crystallization water of nitrate, it takes a long time to dry and evaporate to measure the moisture content in nitrate. The measured data guides the production with hysteresis, and the fluctuation range of moisture content can reach 0.3-0.5%, which has a great impact on production.

Moreover, at present, most of the nitrate production is artificially added water. For products with different wall thicknesses, water is added once for production. After adding water, it is mixed properly and evenly before production. Using this method to add water to manually control the water content is not accurate enough. Quenching is prone to cracks, and the production is evenly stirred, which affects production efficiency

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