Methods and advantages and disadvantages of galvanizing of die steel materials
First, the principle of galvanizing mold steel materials
Galvanizing is the coating of a layer of zinc metal on the surface of a metal material to prevent its oxidation and corrosion. The principle of galvanizing of mold steel materials is to use zinc metal to react with the surface of steel to form a zinc-ferroalloy layer or zinc-iron compound layer. This layer can effectively isolate the contact between the steel and the outside air, water and other substances, so as to prevent the corrosion of the steel.
Second, the method of galvanizing the mold steel material
Hot-dip galvanizing
Hot-dip galvanizing is a commonly used galvanizing treatment. In this method, the mold steel material is immersed in molten zinc preheated to a suitable temperature, so that a zinc layer is formed on the surface of the steel. Hot-dip galvanizing can provide a relatively uniform galvanized layer with good adhesion and wear resistance. However, since hot-dip galvanizing requires high-temperature treatment, it may cause changes in the size, hardness, and other properties of the mold material.
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Electrogalvanized
Electrogalvanizing is the use of electrolysis to plating a layer of zinc on the surface of the mold steel material. This method is easy to operate and can control the thickness of the galvanized layer. Compared with hot-dip galvanizing, the treatment temperature of electro-galvanizing is lower, and it has less impact on the performance of the mold material. However, the coating quality of electrogalvanizing may be affected by factors such as current density, plating solution composition, etc., and the process parameters need to be strictly controlled.
Hot-dip galvanized
Hot-dip galvanizing is the immersion of mold steel material in molten zinc for galvanizing. This method is suitable for larger size die steel materials and can obtain a thicker galvanized layer. However, hot-dip galvanizing may produce defects such as bubbles and sparks, and corresponding treatment measures are required.
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merit
(1) Good anti-corrosion performance: the appropriate galvanizing method is used to treat the mold steel material, which can effectively prevent the oxidation and corrosion of the steel and prolong the service life of the mold.
(2) Reduce the coefficient of friction: the surface of the mold steel material becomes smoother and smoother after galvanizing, which reduces the friction resistance between the mold and other materials, and improves the work efficiency of the mold.
(3) Beautiful and durable: The galvanized layer not only has an aesthetically pleasing metallic luster, but also can enhance the wear resistance and hardness of the die steel material.
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shortcoming
(1) High processing cost: The galvanizing treatment of die steel materials requires certain equipment and technology, and the cost is high.
(2) Increased processing difficulty: The formation of zinc layer will change the size of the mold steel material and increase the difficulty of processing.
(3) Impact on the environment: The galvanizing process will produce a certain amount of waste water and waste gas, which needs to be treated with corresponding environmental protection measures.