High-nitrogen pressure smelting system

Abstract

The invention discloses a high-nitrogen pressure smelting system which comprises a shell, a furnace cover, a smelting device with a cooling function and a feeding device. An air inlet is formed in the upper portion of the side wall of the shell, an air outlet is formed in the lower portion of the side wall of the shell, and a mounting opening is formed in the top of the shell. The furnace cover is arranged on the shell and is used for blocking or opening the mounting opening of the shell. The smelting device with the cooling function is located in the shell. The feeding device is arranged on the furnace cover and used for feeding materials into the smelting device. The high-nitrogen pressure smelting system has the beneficial effects that the design is reasonable, the preparation technology is simple, and the high-nitrogen pressure smelting system is suitable for research and application of a high-temperature alloy nitriding technology.

Description

technical field [0001] This application relates to a high nitrogen pressure smelting system. Background technique [0002] At present, new superalloys are considered to be the most promising research direction. The service temperature of most superalloys is below 900°C. When the service temperature exceeds 900°C, the strength of the age-hardening alloy will drop sharply because the precipitates no longer have thermal stability or thermodynamic stability. The service temperature of solid solution alloys is slightly higher than 1000 ° C, so in the temperature range of 800 ~ 1100 ° C, other strengthening mechanisms must be used to increase the service temperature of superalloys: such as ODS alloys. [0003] For the most widely studied high-temperature nickel-based alloys, nitriding the nickel-based alloys under high nitrogen pressure can significantly improve the hardness, corrosion resistance and wear resistance of the alloy. After thermomechanical treatment, nitrides are fo...

AI Technical Summary

Problems solved by technology

[0005] At present, the nitriding smelting systems on the market generally have the shortcomings of insufficient air exhaust before nitriding, imperfect cooling systems, and uncontrollable material addition, which are not conducive to nitriding smelting of high-temperature alloys.

There are deficiencies in the carburizing or nitriding process of superalloys, which often lead to the performance of the prepared alloys not meeting the requirements

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