The basis of heat treatment of Wuhan Handern Steel
DATE：2020/5/7 8:20:56 / READ： / SOURCE：This station
The basis of heat treatment of Wuhan Handern Steel
The basic purpose of heat treatment is
1) Eliminate the defects in casting and forging blanks, improve the internal structure and process performance, and prepare for the organization of subsequent processes. www.handern.com Meltblown non-woven production line
2) Improve the mechanical properties of steel so as to give full play to the potential of steel and extend the service life of mechanical parts
According to different heating and cooling methods, commonly used heat treatment methods can be divided into the following types:
1. Overall heat treatment The heat treatment process of penetrating and heating the entire workpiece is called overall heat treatment. The overall heat treatment of steel is mainly annealing, normalizing, fire and tempering. Among them, annealing and normalizing are heat treatment processes performed in advance to adjust the original structure to ensure that the final heat treatment (quenching and tempering) of the workpiece becomes (and) the cutting quality surface. Fire and tempering as the final heat treatment is a heat treatment process to obtain the mechanical properties required for the use of steel parts. www.handern.com Meltblown non-woven production line
2. Surface heat treatment is a process of heat-treating only the surface to change the structure and performance of the workpiece surface. Surface fires are widely used in production, including induction fires, flame fires, laser flames, electronic flames, contact resistance heating flames, and electrolyte melting flames. www.handern.com Meltblown non-woven production line
3. Chemical heat treatment is a heat treatment that places the workpiece in an appropriate active medium for heating, heat preservation, and making one or several elements oil on its surface to change its chemical composition, organization, and performance. Commonly used chemical heat treatment methods are carbon, nitrogen, carbon-chlorinated, nitrocarburized, sulfur, sulfur-chlorinated, sulfur-chlorinated, boron, silicon, zinc, aluminum, chromium, vanadium, chromium-aluminum, aluminum, etc. www.handern.com Meltblown Nonwoven Fabric Production Line www.handern.com Meltblown Nonwoven Fabric Production Line
Second, the basic principles of heat treatment of Wuhan Modern Steel
Although there are many heat treatment methods, any heat treatment process consists of three stages: heating, heat preservation, and cooling. Figure 3-1 is a typical heat treatment process curve. Therefore, to understand the changes in the structure and properties of steel by various heat treatment methods, first of all, the changes of steel during heating (including heat preservation) and cooling should be studied. www.handern.com meltblown cloth equipment
Author：admin