半连不锈钢AISI 304的等离子膏剂渗硼处理课程毕业设计外文文献翻译.doc

Plasma paste boroniding treatment of the stainless steel AISI 304 1.Introduction AA3003 alloys in recent years, the development of surface treatment process has been extensive research to improve the application of stainless steel under high temperature and pressure wear and oxidation resistance. Stainless steel surface treatment methods available, including nitrogen [2], carburizing, plasma coating, boron penetration In particular, the boride is boron penetration and diffusion into the surface of the boride layer (hardness (HV) between in 1300-2100) of the surface treatment. Boride layer has excellent heat resistance and corrosion resistance, and boride have been applied to improve the valve, burners, nozzles and other surface properties, when they are exposed to high temperature and pressure when in the water and oil. Recently, however, improved technology such as plasma Boronizing infiltration process has been extensively studied, because the traditional boronizing process, such as the official salt-bath and gas nitriding boron-boron will appear, such as environmental pollution, toxic, explosive nature of the problem. Plasma boronizing has many advantages over traditional boronizing process. For example, expect a high energy efficiency as a source of high-energy plasma to be used in plasma boronizing process, and distortion can be minimized, because the processing temperature is relatively lower than the traditional process. However, plasma boronizing process also has its own limitations. BZH6 and BC13 gas was used as a boron source gas, but gas is relatively expensive and toxic, explosive. In a vacuum chamber by boron chloride corrosion is another serious problem for the plasma boronizing. In this study, as the development of a solution to the problem mentioned above and more in the process of boron penetration in one attempt, involving the use of amorphous boron and borax (Na2B4O7) cream is a simple process of plasma Pasty boronizing methods have been designed,