SUH660 high-temperature alloy fastening piece and production process

Abstract

The invention relates to an SUH660 high-temperature alloy fastening piece and a production process. The SUH660 high-temperature alloy fastening piece is prepared from the components in percentage by weight: less than or equal to 0.08 percent of carbon C, less than or equal to 1 percent of silicon Si, less than or equal to 2 percent of manganese Mn, less than or equal to 0.03 percent of sulphur S,less than or equal to 0.040 percent of phosphorus P, 13.5 percent to 16.0 percent of chromium Cr, 24 percent to 27 percent of nickel Ni, 1 percent to 1.5 percent of molybdenum Mo, 0.1 percent to 0.5 percent of vanadium V, 0.001 percent to 0.01 percent of boron B, 1.9 percent to 2.35 percent of titanium Ti, and less than or equal to 0.35 percent of aluminum Al. The invention provides the productionprocess of the SUH660 high-temperature alloy fastening piece. The alloy fastening piece produced through the process not only has strength and hardness which are not possessed by a common fastening piece, but also has favorable plasticity, toughness and corrosion resistance and excellent tensile strength, fatigue strength and delayed fracture resistance, is not easy to fracture, break or lose efficacy in the manufacturing and use process in the related areas, and can further keep normal work under the high-temperature environment with the maximum temperature being 650 DEG C, so that the service life is prolonged greatly.

Description

technical field [0001] The invention relates to a SUH660 superalloy fastener and a production process. Background technique [0002] With the continuous advancement of my country's revitalization of the equipment manufacturing industry, the speed of industrial upgrading is accelerating, and the integration of my country's fastener industry with the economies of other countries is accelerating. high demands. my country's fastener manufacturing has accumulated certain experience in metal materials, heat treatment, metal surface protection, assembly methods, etc., but there are not many technological innovations, and there is a big gap compared with foreign fastener counterparts. With the development of automobile industry, high-speed railway, large-scale construction, aerospace and other fields, higher requirements are put forward for the performance of fasteners. In the future, fasteners will be high-strength, high-performance, energy-saving and environmentally friendly, and ...

AI Technical Summary

Problems solved by technology

[0003] However, at present, SUH660 material, because it can still maintain good mechanical properties below 650°C, is mostly used in the production of automotive fasteners and aviation fasteners, but the processing technology is hot heading or turning forming, and the material utilization rate is not high. Low efficiency and harsh production environment