Biodegradable quenching agent and preparation method thereof

Abstract

The invention discloses a biodegradable quenching agent. The biodegradable quenching agent is characterized by being prepared from the raw materials in parts by weight: 6-10 parts of natural extracts, 0.1-0.2 part of fumaric acid, 0.1-0.2 part of potassium palmitate, 0.5-1 part of sodium bicarbonate, 0.5-1 part of sodium chloride, 1-2 parts of sodium citrate, 0.5-1 part of sucrose fatty acid ester, 0.05-0.1 part of galactomannan, 0.3-0.5 part of maltodextrin, 0.3-0.5 part of cottonseed oil, 0.3-0.5 part of perilla oil and 80-100 parts of water. The quenching agent is prepared from the natural extracts of pine needles and kelp as raw materials, the raw materials are wide in sources, natural and free of pollution; the quenching agent has the advantages of simple preparation process, good environmental compatibility, good quenching uniformity, good antirust property, corrosion resistance and bactericidal property, stable property and strong practicability; the cooling property of a product can be effectively improved and the problems of cracking, deformation and the like of the quenched workpiece are avoided.

Description

technical field [0001] The invention relates to heat treatment technology, in particular to a biodegradable quenching agent and a preparation method thereof. Background technique [0002] Quenching medium in heat treatment production directly affects the performance of parts after quenching, and is a key factor affecting product quality. Commonly used quenching media mainly include water, aqueous solution, oil, etc. Among them, quenching oil is very polluting to the environment, and it is easy to cause fire during quenching, so it is difficult to meet the requirements of safety and environmental protection. [0003] Water is a quenching medium with strong cooling capacity. It has wide sources, low price, stable composition and not easy to deteriorate. The disadvantage is that the workpiece is prone to "soft spots" during the cooling process, and in the martensitic transformation temperature zone, due to too fast cooling, it is easy to generate a large internal stress, resul...

AI Technical Summary

Problems solved by technology

The disadvantage is that the workpiece is prone to "soft spots" during the cooling process, and in the martensitic transformation temperature zone, due to too fast cooling, it is easy to generate a large internal stress, resulting in deformation or even cracking of the workpiece

Part of the water-based quenching agent adds an appropriate amount of salt and alkali to the water, so that after the high-temperature workpiece is immersed in the cooling medium, crystals of salt and alkali can be precipitated in the steam film stage and burst immediately, thereby destroying the steam film and shattering the surface oxidation of the workpiece. Quenching agent can improve the cooling capacity of the medium in the high temperature area, but this kind of quenching agent is highly corrosive and affects the cleanliness of the production environment