Nitriding equipment and process based on high valve stability

Abstract

The invention relates to the field of valve nitridation, in particular to a nitridation device and process based on valve high stability. The nitridation device based on the valve high stability comprises a first conveyor belt, a polishing mechanism, a machine frame, a gas storage tank, a drying stove and a reactor, wherein the gas storage tank, the drying stove and the reactor are sequentially arranged on the machine frame. The nitridation process based on the valve high stability includes the following steps that firstly, a valve is sent into the drying stove through the first conveyor beltto be baked, and nitrogen is heated at the same time; secondly, when the valve is baked to 290 DEG C to 310 DEG C and the nitrogen is heated to 390 DEG C to 410 DEG C, the valve and the nitrogen are sent into the reactor to be subjected to nitridation treatment; thirdly, after nitridation treatment is conducted for 35 min to 45 min, the valve is sent onto a second conveyor belt; and fourthly, thevalve is polished through the polishing mechanism. When the technical scheme is adopted, dark dirt on the surface of the valve can be removed while the stability of the valve is improved.

Description

technical field [0001] The invention relates to the field of valve nitriding, in particular to nitriding equipment based on high valve stability and a process thereof. Background technique [0002] The function of the valve is to input air into the engine and discharge the exhaust gas after combustion. The valve includes the valve stem and the valve head; due to the high temperature in the engine, the valve must have certain wear resistance, fatigue resistance and corrosion resistance. performance and high temperature resistance. [0003] Nitriding treatment refers to the chemical heat treatment process that makes nitrogen atoms penetrate into the surface layer of the workpiece. When nitriding the valve, the valve is usually placed in the nitriding equipment to contact with nitrogen gas, so that nitrogen atoms can penetrate into the surface layer of the valve. After nitriding The valve has a certain stability in terms of wear resistance, fatigue resistance, corrosion resist...

AI Technical Summary

Problems solved by technology

[0003] Nitriding treatment refers to the chemical heat treatment process that makes nitrogen atoms penetrate into the surface layer of the workpiece. When nitriding the valve, the valve is usually placed in the nitriding equipment to contact with nitrogen gas, so that nitrogen atoms can penetrate into the surface layer of the valve. After nitriding The valve has a certain stability in terms of wear resistance, fatigue resistance, corrosion resistance and high temperature resistance, but it is found that the nitriding effect of the valve is not good during the inspection process, and the stability performance has not reached the best level

Moreover, after the valve is nitrided, a large amount of black scale will adhere to the surface of the valve, which is difficult to remove and directly affects the cleanliness of the finished valve.

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