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Vacuum coating machine and the surface treatment of high-speed steel

2020-03-23 17:33  Times of view:

Vacuum coating machine manufacturers: With the development of technology, people on the basis of the old process oxide (black), and the like on the plating and nitriding has developed a number of novel surface strengthening and protection methods. Vacuum coating equipment manufacturers: various conventional surface hardening heat treatment and prevention methods are applied in the high speed steel tooling. By nature and surface modification layer and the substrate binding properties of the process, which can be divided into infiltration methods, plating, chemical conversion film surface is formed shallow quench hardening four categories.

1) infiltration. Vacuum coating, vacuum coating equipment manufacturer: atomic heterogeneous element to the workpiece surface is transmitted through the absorption medium, by incorporating the elements have some solubility in the iron matrix and the concentration gradient is established with the interior surface, the diffusion path is formed from outside to inside gradually saturated infiltrated elements, there is a continuously varying concentration of the transition layer and the composition layer between saturated region unchanged. This combination of surface modification layer and the substrate is referred to as "metallurgical bond", various surface treatment method is combined with the most solid, such as nitriding and carburizing.

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2) coating method. Vacuum coating, vacuum coating equipment manufacturers: high performance coated material layer on the surface by vacuum deposition, ion plating, spraying or the like. Now used most hardness, wear resistance, and reduce wear on both the superior chemical resistance of the protective TiN, TiC and diamond plating ion plating. Similar to the conventional electroless plated layer using a physical method of binding the coating and the substrate coating is substantially belong to the non-metallurgical bond at temperatures below 560 ℃, if the workpiece surface prior to plating dirty, or at other non-active state, or when the coating is too thick, it is easy to fall off occurs.

3) open into a chemical conversion coating method. Through the medium of an element and a steel element (usually iron) covering the surface chemistry of the compound layer, and media elements involved in the compound solubility in iron is extremely small, it is impossible to establish the concentration of solute at the surface gradient, thus metamorphic layer and the substrate in the presence and composition neither obvious structural transition zone, and are non-binding and substrate metallurgy. This method generally named "of" is defined as oxide, phosphate and the like.

4) Surface Shallow hardened method. Vacuum coating, vacuum coating equipment manufacturers: This is a category for application in recent years in the laser hardening tool of high speed steel and separated. Deep surface hardening (flame, induction heating) very few applications in high-speed steel tools. High-energy, micro light spot on the tool hardened quenching and tempering has been completed, the selected portion of the scan, the position can be obtained and a secondary hardening depth are all controlled shallow surface hardening layer.

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