Target and process for utilizing same to plate film on aluminum or aluminum alloy substrate

Abstract

The invention relates to a process for plating a film on an aluminum or aluminum alloy substrate. The method comprises the following steps of: pretreating the surface of a substrate; preparing a target from the following components in percentage by weight: 0.06-0.10 percent of carbon, 9.0-9.5 percent of nickel, 17.5-18.0 percent of chromium, 1.80-2.20 percent of manganese, 0.80-1.20 percent of silicon, 0.01-0.05 percent of sulphur, 0.043-0.048 percent of phosphorus, 2.38-2.42 percent of molybdenum, 0.0001-0.0005 percent of tungsten, 0.08-0.12 percent of copper, 0.04-0.08 percent of vitriol and the balance of iron; loading the target into vacuum sputtering equipment; and finally, plating the target on the surface of the substrate by adopting a vacuum magnetic control cathode sputtering method, wherein before sputtering is carried out, the vacuum degree in a furnace is 3.0-4mTorr, the argon quantity used during sputtering is 25-60R, direct current is used for bombarding, the voltage is 180-200V, and the current is 10-15A. The process not only achieves the purpose of environmental protection but also meets the requirement on quality.

Description

technical field [0001] The invention relates to a target material and a process method for coating a film on an aluminum or aluminum alloy base material by using the target material, especially for the coating application of an automobile wheel hub. Background technique [0002] With the sharp increase in the global sales of automotive wheels, the wheel market is paying more and more attention to the coating quality and pre-treatment requirements of the wheels. Among them, the metal film agent (also known as the target material) is one of the very important agents in the workpiece pretreatment process. In the current metal surface treatment chemical market, the best coating agent for aluminum or aluminum alloy products is only chromic acid, but chromic acid itself is a high-polluting substance of heavy metals, which is contrary to the environmental protection requirements of today's society. Secondly, chromic acid will also cause the residue of the chemical agent in the pre...

AI Technical Summary

Problems solved by technology

In the current metal surface treatment chemical market, the best coating agent for aluminum or aluminum alloy products is only chromic acid, but chromic acid itself is a heavy metal pollution substance, which is contrary to the environmental protection requirements of today's society

Secondly, chromic acid will also cause the residue of chemicals in the pretreatment process of the wheel hub, which will cause poor adhesion of the paint film in the subsequent coating process of the wheel hub and affect the product quality.

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