Quenching agent

Abstract

The invention discloses a quenching agent which is prepared from the following components in parts by weight: 15-20 parts of polyether, 1-3 parts of sodium benzoate, 0.5-1 part of isopropanolamine, 0.2-0.5 part of calcium sulfonate, 1-5 parts of triethanolamine, 0.1-0.3 part of antifoaming agent and 10-20 parts of water. The quenching agent disclosed by the invention greatly reduces the cooling speed in a low-temperature condition, and has enough cooling speed in a high-temperature condition, guarantees a good quenching effect without causing hardening crack of the product, improves the service life and performance of steel, and has the advantages of low cost, simple implementation conditions and marketing promotion.

Description

Technical field [0001] The invention belongs to the field of metal heat treatment, and specifically is a quenching agent. Background technique [0002] In order to improve the performance of metal materials such as steel, it is necessary to perform heat treatment on metal workpieces. Common heat treatment processes include quenching, tempering, annealing, and normalizing. Among them, quenching refers to, for example, rapidly cooling a workpiece heated to an austenite state at a rate above the critical cooling rate to form a quenched structure such as martensite. After quenching, the hardness of the workpiece can be increased. In the quenching process, the cooling process of the workpiece is generally divided into three stages, that is, the first stage where the metal material is surrounded by the steam of the quenching medium (vapor film stage), the second stage where the vapor film ruptures and boils (boiling stage), and the metal When the temperature of the material reaches th...

AI Technical Summary

Problems solved by technology

[0003] The traditional quenching medium includes water-based quenching agent and oil-based quenching agent. The characteristic of water-based quenching agent is that it has a high cooling rate throughout the cooling process. In the high-temperature cooling stage, the high cooling rate can promote the formation of fine-grained workpieces. It is beneficial to improve the final performance of the workpiece, but in the low temperature stage, too fast cooling rate will make the internal stress of the workpiece too large, so it is easy to cause the workpiece to crack

Compared with the water-based quenching agent, the oil-based quenching agent is characterized by a slow cooling rate throughout the cooling stage. Although it can prevent the workpiece from cracking due to excessive internal stress in the low-temperature stage, it is easy to cause the workpiece to crack due to the slow cooling rate in the high-temperature stage. Larger grains reduce the performance of the workpiece after quenching