What is the difference between carburizing and tempering
Zoe Jia
2023-08-17 11:01:00
Tempering treatment
The heat treatment method of high-temperature tempering after quenching is called quenching and tempering treatment.
High-temperature tempering refers to tempering between 500-650°C. Quenching and tempering can make the performance of steel, the material can be adjusted to a large extent, its strength, plasticity and toughness are better, and has good comprehensive mechanical properties. After tempering treatment, tempered cordite is obtained. Tempered sorbite is formed by martensite during tempering, which can be distinguished by magnification of more than 500~600 times under optical metallographic microscope, which is a composite structure of carbide (including cementite) chondrules distributed in the ferrite matrix. It is also a tempering tissue of martensite, a mixture of ferrite and granular carbides. At this time, the ferrite has basically no carbon supersaturation, and the carbide is also a stable carbide. It is a balanced tissue at room temperature.
The heat treatment method of high-temperature tempering after quenching is called quenching and tempering treatment.
High-temperature tempering refers to tempering between 500-650°C. Quenching and tempering can make the performance of steel, the material can be adjusted to a large extent, its strength, plasticity and toughness are better, and has good comprehensive mechanical properties. After tempering treatment, tempered cordite is obtained. Tempered sorbite is formed by martensite during tempering, which can be distinguished by magnification of more than 500~600 times under optical metallographic microscope, which is a composite structure of carbide (including cementite) chondrules distributed in the ferrite matrix. It is also a tempering tissue of martensite, a mixture of ferrite and granular carbides. At this time, the ferrite has basically no carbon supersaturation, and the carbide is also a stable carbide. It is a balanced tissue at room temperature.
Carburizing heat treatment
Carburizing is generally for steel, steel carburizing is the steel in the carburizing medium heating and insulation, so that the carbon atoms penetrate into the surface of the steel, so that the carbon concentration on the surface of the surface changes, so as to obtain a heat treatment process with a certain surface carbon content and a certain concentration gradient.
The purpose of carburizing is to make machine parts obtain high surface hardness, wear resistance and high contact fatigue strength and bending fatigue strength.
Carburizing is divided into three types: solid carburizing, liquid carburizing and gas carburizing according to the different aggregation states of the permeating agent