A kind of glycerol aqueous solution quenching cooling medium and preparation method thereof

Abstract

The invention discloses a glycerin water solution quenching cooling medium. The quenching medium adopts glycerin as a main component of water solution; and few other components are added to form a novel water base organic compound quenching cooling medium with quicker cooling speed compared with quenching oil in the carbon steel perlitic transformation phase and with slower cooling speed compared with water in the martensitic transformation phase. The novel quenching medium has the following characteristics: the novel quenching medium not only can keep quicker cooling speed in the quenching process, but also can reduce the deformation and the cracking of parts, is free of smoke, fire and poison in the whole quenching process, is environment-friendly, and is low in preparation cost.

Description

technical field [0001] The invention belongs to the technical field of design and preparation of a heat treatment quenching cooling medium, and in particular relates to a novel quenching cooling medium of a water-based simple organic compound. Background technique [0002] The selection and application of quenching medium in the heat treatment process directly affects the quenching quality and mechanical properties of mechanical parts and workpieces. The ideal quenching cooling medium should have a fast cooling rate in the high temperature zone and a relatively gentle cooling rate in the low temperature zone. As we all know, the traditional quenching medium includes water, quenching oil, molten salt and alkali, polymer water-soluble quenching agent, etc., among which water is the most common one in the quenching medium. In the quenching process, water has a strong role as a quenching medium. The cooling rate can pass through the pearlite transformation zone at a very fast q...

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Problems solved by technology

As we all know, the traditional quenching medium includes water, quenching oil, molten salt and alkali, polymer water-soluble quenching agent, etc., among which water is the most common one in the quenching medium. In the quenching process, water has a strong role as a quenching medium. The cooling rate can pass through the pearlite transformation zone at a very fast quenching rate, thereby avoiding the formation of non-martensitic structures during the quenching process, causing quenching soft spots, and affecting the mechanical properties of the workpiece. However, due to the fast cooling rate of water, As a result, in the martensitic transformation temperature region, the faster cooling rate brings excessive quenching stress, which often causes deformation and cracking of the workpiece

The common quenching oil of oil quenching medium is organic oil, bright quenching oil, oil as a quenching medium greatly slows down the cooling rate in the quenching process, and the workpiece after oil quenching hardly occurs cracking and deformation, but its shortcomings are also obvious, because The slow cooling rate of oil during the quenching process often leads to the formation of some pearlite structures in the pearlite transformation stage, resulting in soft spots in quenching, which is difficult to meet the quenching requirements of high-quality mechanical parts and components, and is accompanied by fire and thick smoke during the quenching process , the working environment is not environmentally friendly

The most commonly used quenching medium for polymers is PAG. This kind of aqueous solution has a good quenching effect, but compared with other quenching mediums, this kind of polymer polymer quenching medium has the disadvantages of easy aging and frequent maintenance. At the same time, the high price is another shortcoming of this kind of quenching medium.

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