Heat treatment is a method of changing the physical properties of metals by heating and cooling. Heat treatment can improve the microstructure of steel so as to meet the physical requirements. Toughness, hardness and wear resistance are obtained by heat treatment. To obtain these properties, heat treatment, such as hardening, tempering, annealing and surface hardening, are required.
Quenching is also known as quenching is the uniform heating of the metal to the appropriate temperature, and then quickly immersed in water or oil in the cold, or in the air or cooling zone cooling, so that the metal required hardness.
Tempering - hardened steel parts will become brittle, and the stress caused by quenching quenching, the steel parts by tapping and fracture. In order to eliminate the brittleness, the tempering process can be used. Tempering is to re heating the steel to the appropriate temperature or color, and then to be cold. Although the hardness of the steel is slightly reduced, the toughness of the steel is increased and the brittleness of the steel is reduced.
Annealing annealing is an effective method to eliminate the internal stress of steel parts and to. Annealing is to heat the steel to a higher than the critical temperature, and then put in dry ash, lime, asbestos or closed in the furnace, so that it slowly cooling.
Hardness is the ability of a material to resist foreign objects. The most common steel hardness test method is to use file on the edge file eraser, presented by the surface scratch depth to determine its hardness level. This method is called the test method is not very scientific. The hardness tester is very accurate, it is a common method of hardness test.
Forging is the use of hammering to make the metal into a certain shape < < > >, when the steel parts to the forging temperature, can be engaged in forging, bending, drawing, forming and other operations. Most of the steel is very easy to forge when heated to bright cherry red. Can increase the hardness of steel commonly used method is quenching.
We have excellent products, perfect service, reliable reputation, for your career success to help, we sincerely welcome all colleagues to discuss business!