Quenching oil for gear shift connection rod

Abstract

The invention discloses quenching oil for a gear shift connection rod. The quenching oil is prepared from the following raw materials in parts by weight: 65-75 parts of 150N Group II base oil, 2-5 parts of high molecular weight succinimide, 10-15 parts of palm wax, 35-40 parts of refined paraffin base mineral oil, 2-3 parts of sulfide base phenol, 2-3 parts of dimethylmethane petroleum asphalt resin, 4-5 parts of epoxidation castor oil, 1-2 parts of alkylene polyether and 3-8 parts of modified antioxygen. By adopting the quenching oil, the internal crystalline phase density of metal can be reinforced, and lattice deformation torsion resistance is improved, so that metal strength is obviously improved; the tensile property and tangential stress resistance of the manufactured gear shift connection rod are greatly improved; and the service life of the connection rod is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a quenching oil for a shift connecting rod. Background technique [0002] Chemical heat treatment is a heat treatment process that puts a metal or alloy workpiece in an active medium at a certain temperature to keep one or several elements infiltrated into its surface to change its chemical composition, structure and performance. Chemical heat treatment uses chemical reactions and sometimes physical methods to change the chemical composition and structure of the steel surface in order to obtain a metal heat treatment process with better technical and economic benefits than homogeneous materials. Since most of the failure and damage of mechanical parts germinate in the surface layer, especially for parts that may cause wear, fatigue, metal corrosion, oxidation and other conditions, the performance of the surface layer is particularly important. [0003] Iron and steel part...

AI Technical Summary

Problems solved by technology

Disadvantages of existing quenching oil: when quenching, the temperature of the oil will rise instantaneously. If the flash point and ignition point of the oil are low, fire may occur; excessive moisture in the oil will affect the heat treatment quality of the parts, resulting in soft spots of the parts , Quenching cracking or deformation may also cause oil splashing and accidents; the steam film stage lasts for a long time, which will lead to parts after quenching and cooling: uneven cooling, uneven hardness and softness of parts, large quenching deformation; and quenching The final parts cannot meet the required mechanical properties; the effective life of quenching oil is short

At present, there is no special quenching oil for gear shift connecting rod quenching at home and abroad.