Special quenching agent for low-carbon alloy steel

Abstract

The invention discloses a special quenching agent for low-carbon alloy steel. The special quenching agent comprises the following components in parts by mass: 2-5 parts of sodium sulfate, 4-6 parts of sodium hydroxide, 1-2 parts of starch, 5-7 parts of sodium bicarbonate, 6-8 parts of sodium phenylacetate, 5-8 parts of alums and 60-70 parts of white oil. A method for preparing the special quenching agent for low-carbon alloy steel comprises the following steps: dissolving sodium sulfate, sodium hydroxide, starch, sodium bicarbonate, sodium phenylacetate and alums into white oil of 55-60 DEG C according to proportions, and uniformly mixing. The special quenching agent for the low-carbon alloy steel, which is disclosed by the invention, is low in cost, safe and free of pollution, unlikely to cause fire hazard and convenient to use, and does not need to be prepared temporarily when being used.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a special quenching agent for low-carbon alloy steel. Background technique [0002] Human civilization and the use of metal materials are inseparable. According to statistics, metal materials still account for more than 90% of the materials used in various machinery and equipment. Quenching is an important means to obtain the properties of metal materials, and the quenching medium is one of the key factors to obtain high quenching quality. Before the 20th century, animal and vegetable oils were basically used for quenching. Animal and vegetable oils contain more unsaturated fatty acids. Due to hydrolysis and oxidation, carboxylic acids, aldehydes, ketones and other substances with pungent odors are produced, which are easy to rancid and deteriorate, and have a bad impact on the environment. At the same time, due to the instability of the components, the quenchin...

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Problems solved by technology

However, although this type of water-soluble organic cooling medium does not produce serious pollution and fire hazards when it is used for quenching, the market price is still high, and the storage period of the original medium is limited. It can be used only when it is formulated into an aqueous solution in a certain proportion. In use, the organic matter solution will accelerate aging after being heated, and its cooling characteristics will change. If it is not replaced in time, the quality of the heat-treated product will be reduced, or even unqualified.

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