High-speed hack blade is a commonly used metal cutting tool with high hardness. This article will introduce in detail the hardness principle, hardness testing method, the significance of hardness value and the method of improving the hardness of high-speed steel saw blade, hoping to help readers.
- The hardness principle of high-speed steel saw blade The hardness of high-speed steel saw blade refers to its ability to resist scratches, which is usually evaluated by graphite scale. The hardness of high-speed steel mainly depends on its microstructure and composition, among which the content and distribution of hard carbides have an important impact on the hardness. Generally speaking, the higher the content of tungsten carbide and molybdenum carbide in high-speed steel, the higher the hardness.
- Hardness test method of high-speed steel saw blade
Rockwell hardness testing method The Rockwell hardness testing method is a commonly used hardness testing method, and it is also applicable for the hardness testing of high-speed steel saw blades. This test method applies a certain load to the surface of the specimen and then measures the size of the imprint, judging the hardness value according to the standard table.
Brinell hardness test method The Brinell hardness test method is another commonly used hardness testing method that can also be used for hardness testing of high-speed steel saw blades. This test method involves applying a certain load to the specimen with a steel ball or diamond cone, and then measuring the size of the imprint, judging its hardness value according to a standard table.
High-speed hacksaw blades
- The significance of the hardness value of the high-speed steel saw blade The hardness value of the high-speed steel saw blade can reflect its wear resistance and cutting performance. Normally, the higher the hardness value, the better the cutting performance of the saw blade, but the wear resistance is relatively poor; Conversely, the lower the hardness value, the better the wear resistance of the saw blade, but the less cutting performance it has. Therefore, when actually choosing to use high-speed steel saw blades, it is necessary to comprehensively consider the hardness value and other performance indicators according to the specific cutting materials and requirements.
Fourth, the method of improving the hardness of high-speed steel saw blade
Improve the content and distribution of carbides Carbides are the main factor in improving the hardness of high-speed steel saw blades, and by adjusting the alloy ratio and manufacturing process, the content of carbides can be increased and distributed as evenly as possible in the steel, thereby improving the hardness.
Reasonable control of quenching process Quenching is a key process link in the manufacture of high-speed steel saw blades, and reasonable control of quenching temperature, time and cooling rate and other factors can effectively improve the hardness. Reasonable quenching process conditions can make the carbide of the high-speed steel saw blade dissolve quickly, produce a uniform and fine martensitic structure, thereby improving the hardness and strength.
By using chemical heat treatment, surface sputtering coating, surface carburizing and other methods, a layer of film with higher hardness can be formed on the surface of the high-speed steel saw blade or the surface carbon content can be increased, so as to improve the overall hardness of the saw blade.
Optimize the annealing process In the manufacturing process of high-speed steel saw blades, a proper annealing process can improve the internal stress and grain structure of the material, reduce the presence of impurities and defects, and thus improve the hardness and toughness.
The use of advanced process equipment With the help of modern advanced process equipment such as high temperature and high pressure and high-speed processing, the overall hardness and working efficiency of high-speed steel saw blades can be improved.
The above is an introduction to the hardness of high-speed steel saw blades, by understanding the hardness principle, test methods, the significance of hardness values and ways to improve the hardness of high-speed steel saw blades, we can better choose and use high-speed steel saw blades to improve work efficiency and cutting quality.