Electric smelting forming method of hydrogenation reactor barrel

Abstract

The invention mainly aims at providing a forming method of a hydrogenation reactor barrel. The method is efficient, low in cost and good in mechanical property. The method comprises the steps that an electric smelting head and a base material are connected to two electrodes of a power source, and in the forming process, metal raw material wires are conveyed to the surface of the base material through a conveying mechanism and the electric smelting head; under accumulation protection of granular auxiliary materials, an electric arc is generated between the raw material wires and the base material, and a molten slag pool is formed by stacking and laying the auxiliary materials on the smelting portion; current flows through the raw material wires and the molten auxiliary material slag pool to form resistance heat and electric slag heat; under the effect of three component high-energy heat sources of electric arc heat, the resistance heat and the electric slag heat, the raw material wires are molten; a local molten pool is formed on the surface of the base material, and the raw material wires and the auxiliary materials are continuously conveyed; according to layered section data of a forming component, a computer is adopted to control relative movement of the electric smelting head and the base material; and the aim that the molten pools are rapidly cooled, solidified and stacked layer by layer on the base material is achieved, and finally the hydrogenation reactor barrel is formed.

Description

technical field [0001] The invention relates to an electric melting forming method for a cylinder body of a hydrogenation reactor. Background technique [0002] The hydrogenation reactor is the core equipment of various hydrogenation processes or hydrogenation units. The working conditions are harsh, the technology is difficult, the manufacturing technology is high, and the cost is expensive. Especially because of the particularity of the operating conditions of the hydrogenation unit, the reactor is exposed to high-temperature hydrogen corrosion, hydrogen embrittlement, temper brittle damage of chromium-molybdenum steel, and even Under the influence of multiple damage factors such as polysulfuric acid stress corrosion cracking and hydrogen-induced peeling of the surfacing layer of austenitic stainless steel, it is easy to be damaged and even scrapped. Preventing these destructive damages not only requires correct design, but also has a lot to do with material selection and...

AI Technical Summary

Problems solved by technology

[0004] Although this method is widely used in industrial production, due to the complex process and the difficulty in controlling the chemical and mechanical properties, it also results in poor quality stability, uneven heat treatment phase structure, high scrap rate, and low utilization rate of forged structural materials. When the wall thickness is thinner, its manufacturing cost is relatively high

From the final grain measurement results, it is generally only about 4-6 grades. In addition, the hydrogenation reactor is limited by the limitations of steel ingot smelting and forging technology, and the method of segmented material forging and tailor welding is adopted. It is also because the increase of welds severely splits the continuous direction of mechanical fibers, which greatly affects the mechanical properties of materials and the safety of container equipment. It is also very easy to cause delays in manufacturing schedules and increase costs.

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