Water-based polymer quenching liquid for high-chromium cast iron

Abstract

The invention discloses water-based polymer quenching liquid for high-chromium cast iron. The water-based polymer quenching liquid for the high-chromium cast iron is prepared from the following components in percentage by mass: 3 to 10 percent of polyoxyethylene-propylene polyether, 4 to 8 percent of polyvinyl alcohol resin, 0.4 to 1.2 percent of dipropylene glycol, 0.8 to 1.1 percent of zinc chloride, 0.3 to 0.6 percent of magnesium nitrate, 4 to 5 percent of polyoxy enamine, and the balance of water. A preparation method of the quenching liquid comprises the concrete steps of pouring the polyoxyethylene-propylene polyether, the polyvinyl alcohol resin and the water with the total weight being 30 to 35 percent into a heating container, controlling the temperature of the heating container to range from 60 to 80 DEG C, standing for 1 to 2 hours in a vacuum environment after uniformly stirring, then adding all residual components in the heating container, stirring for 50 to 60 minutes, controlling the temperature in the heating container to range from 50 to 55 DEG C during a stirring period, and obtaining the quenching liquid. The water-based polymer quenching liquid for the high-chromium cast iron provided by the invention is remarkably improved in quenching degree, comparable to nickel-molybdenum high-chromium cast iron, and better in hardness distribution uniformity.

Description

technical field [0001] The invention relates to the field of quenching fluid, in particular to a water-based polymer quenching fluid for high-chromium cast iron. Background technique [0002] In the past 30 years, high-chromium cast iron has been systematically studied at home and abroad, and various high-chromium cast iron parts have been produced to replace ordinary alloy cast iron, high manganese steel and some low-alloy steel according to working conditions, and the service life is doubled. Increase. In order to ensure the high wear life of high chromium white cast iron parts, air quenching has been used for many years to obtain a martensitic matrix, followed by tempering to eliminate heat treatment stress. If ordinary high-chromium cast iron workpieces are only quenched by air cooling, the hardenability is poor, the wear resistance is low, and the service life is short. In order to improve the hardenability of high-chromium cast iron, it is usually necessary to add a ...

AI Technical Summary

Problems solved by technology

If the quenching cooling rate is too slow (such as air cooling, air cooling or mist cooling), it will affect the degree of hardening and fail to meet the requirements of the hardened layer of the workpiece