A kind of preparation method of high temperature wear-resistant coating for automobile valve mold
A technology of high temperature resistance and gas valve, which is applied in the direction of coating, metal material coating technology, metal processing equipment, etc., can solve problems such as poor repair effect, achieve good wear resistance and heat resistance, reduce costs, and improve economy benefit effect
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Embodiment 1
[0022] A method for preparing a high-temperature wear-resistant coating for an automobile valve mold, comprising the following steps:
[0023] In an argon atmosphere, place a rotating electrode with a rotational speed of 700 r / min on the easy-wearing part of the surface of the automobile valve mold, with the rotating electrode as the positive pole and the automobile valve mold as the negative pole. The current density is 9×10 5 A / cm 2 The high-energy pulse discharge makes part of the electrode metal of the rotating electrode form a metallurgical bond with the easy-wear part on the surface of the automobile valve mold at 9000 ° C to obtain a high-temperature wear-resistant coating.
[0024] Among them, the rotating electrode is made of tungsten-based alloy, and the weight percentage composition of tungsten-based alloy is: 93% tungsten, 3% iron, 3% nickel, 0.3% tantalum oxide, 0.2% terbium oxide, 0.5% lanthanum oxide, each group The percentage by weight of a point is 100%. Th...
Embodiment 2
[0027] A method for preparing a high-temperature wear-resistant coating for an automobile valve mold, comprising the following steps:
[0028] In an argon atmosphere, place a rotating electrode with a rotational speed of 500 r / min on the easy-wearing part of the surface of the automobile valve mold. The rotating electrode is used as the positive pole and the automobile valve mold is used as the negative pole. The current density is 5×10 5 A / cm 2 The high-energy pulse discharge makes part of the electrode metal of the rotating electrode form a metallurgical bond with the easy-wear part on the surface of the automobile valve mold at 5000 ° C to obtain a high-temperature wear-resistant coating.
[0029] In this embodiment, the material of the rotating electrode and its preparation steps are the same as those in Embodiment 1.
Embodiment 3
[0031] A method for preparing a high-temperature wear-resistant coating for an automobile valve mold, comprising the following steps:
[0032] In an argon atmosphere, place a rotating electrode with a rotational speed of 1000 r / min on the easy-wearing part of the surface of the automobile valve mold, with the rotating electrode as the positive pole and the automobile valve mold as the negative pole. The current density is 10 6 A / cm 2 The high-energy pulse discharge makes part of the electrode metal of the rotating electrode form a metallurgical bond with the easy-wear part on the surface of the automobile valve mold at 10,000 ° C to obtain a high-temperature wear-resistant coating.
[0033] In this embodiment, the material of the rotating electrode and its preparation steps are the same as those in Embodiment 1.
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