How can we improve the hardness of baking screws

In one piece, the things that need to have, there are many, must be to meet a variety of conditions, in order to produce, or flow into the market, we must be to do it to pass the quality can be, car slot screw is one of them, then how to bake paint screw hardness method?

     Hardness is a measure of the degree of hardness and softness of metal materials. The most commonly used method for determining hardness in production is the indentation hardness method, which is used in a certain geometry of the indenter under a certain load into the surface of the metal material being tested, according to the degree of indentation to determine its hardness value. Commonly used methods are Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV) methods.

    Baked screws as metal products, also have the corresponding hardness value. The hardness of screws mainly refers to the surface hardness of screws. The general surface hardness of screws is mainly the hardness from the stress after cold piercing or baking beating/turning. For the internal of the screw, there is no hardness requirement, only the mechanical property requirement. Such as tensile strength, yield strength and impact toughness.

    If you want to improve the hardness of baked screws, the best way is to harden the screws. Increase the hardness of the process are mainly carburizing, heating, surface cold work hardening. The most commonly used is the heating treatment.

    So is it the higher the hardness of the baked screws the better? Of course not. The hardness and toughness of the screw is inversely proportional. Hardness is high, the toughness of the screw will be lower, easy to break; conversely, the screw hardness is low, the tooth pattern is easy to slip wire. A screw that fully meets the requirements of the assembly is actually full of material technology, appearance design and processing skills of the wisdom.