Waste silk extract hardening agent and preparation method thereof

Abstract

The invention discloses a waste silk extract hardening agent which is characterized by being prepared from the following raw materials in parts by weight: 6-10 parts of a waste silk extract, 0.1-0.2 part of tannic acid, 0.1-0.2 part of alginic acid, 0.3-0.5 part of carboxymethyl chitosan, 0.3-0.5 part of xylitol, 0.5-1 part of sodium methyl cocoyl taurate, 0.5-1 part of sodium acetate, 0.5-1 part of sodium bicarbonate, 1-2 parts of sodium tripolyphosphate, 0.1-0.2 part of sodium benzoate and 80-100 parts of water. The hardening agent is prepared by taking the waste silk extract as the raw material, is wide in raw material source, natural, pollution-free, simple in preparation process, good in environmental compatibility and good in quenching uniformity, can effectively improve the product cooling performanc, solve the problems of crack, deformation and the like of workpieces after quenching, reduce resources and change wastes into valuables, has a higher practical value and conforms to the industry policy of environment friendliness and emission reduction.

Description

technical field [0001] The invention relates to heat treatment technology, in particular to a quenching agent of waste silk extract 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 stres...

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