Screws fracture, how hydrogen embrittlement is generated

In the production of car slot screws, often encounter large and small problems, businessmen have become accustomed to the problems encountered, the timely processing, then the screws Screw fracture, hydrogen embrittlement is how to produce it! Let me tell you the following.

    1. Prevent excess hydrogen from being brought in. In the process of metal smelting to reduce the relative humidity, a variety of additives and ingot mold to stop baking adhere to dry.

    2. Dehydrogen disposal. Slow down the cooling rate of the ingot so that the hydrogen has enough time to escape, or put the steel in a vacuum furnace to anneal the hydrogen.

    3. Add appropriate alloying elements to the steel to form a diffuse dispersion of the second phase, as the irreversible trap of hydrogen, so that the active hydrogen content in the material is relatively reduced, thereby reducing the tendency of hydrogen embrittlement of the material.

    4. When pickling or electroplating, add corrosion inhibitor to the acid or electrolyte, so that a large number of hydrogen atoms generated in the solution can be separated from each other on the metal surface to form hydrogen molecules and escape directly from the solution to prevent hydrogen atoms from entering the metal interior.