| 摘要 |
<p>Producing single- or multilayered coating on an extrusion die present as a substrate body made of a heat-resistant steel material, by chemical vapor deposition, comprises providing the substrate body made of the steel material, preferably hot work tool steel, which is provided for cooperating with ductile extruded metal, introducing a first reaction gas containing a metal, preferably titanium, into a reactor for providing coating metal, which accommodates the substrate body, and introducing a second reaction gas containing carbon compound into the reactor for providing carbon for the coating. Producing single- or multilayered coating on an extrusion die present as a substrate body made of a heat-resistant and/or permanently heat resistant steel material by chemical vapor deposition, comprises (a) providing the substrate body made of the steel material, preferably hot work tool steel, which is provided for cooperating with ductile extruded metal and are permanently heat-resistant at an extrusion temperature of 400-950[deg] C, preferably 500-640[deg] C, (b) introducing a first reaction gas containing a metal, preferably titanium, into a reactor for providing a coating metal, which accommodates the substrate body, and (c) introducing a second reaction gas containing a carbon compound into the reactor for providing carbon for the coating. The first and/or the second reaction gas or an additional reaction gas provides nitrogen for the coating. The chemical vapor deposition-coating process is carried out using the reaction gases at an average temperature of 700-950[deg] C, preferably 800-900[deg] C for producing the coating, such that the ratio, preferably weight- and/or atomic percent ratio of carbon and nitrogen in at least one layer of the coating is greater than 1, preferably greater than 2, and/or at least one layer of the coating has a columnar and/or stalk-like structure with multiple structural portions, preferably column-like structural portions, that are aligned adjacent to one another, parallel to one another and aligned perpendicularly to the surface of the substrate.</p> |
