Production method of novel nickel-base furnace tube

Abstract

The invention discloses a production method of a novel nickel-base furnace tube, which comprises the steps that ingredients are weighed according to the following weight percentage: 1%-1.6% of Si, 0.8%-1.6% of Mn, less than or equal to 0.03 of P, less than or equal to 0.02 of S, 28%-30% of Cr and 58%-61% of Ni; the weighed ingredients are put in an electromagnetic stirring medium-frequency induction furnace for smelting; after the alloy is wholly melted, a sample is taken, and the content of components is analyzed; the components are adjusted to be qualified before the furnace; the temperature is raised; slag is hit; a deoxidizing agent is added for deoxidization; when molten steel reaches the tapping temperature, microalloying treatment is conducted; and the molten steel is cast to form a centrifugal casting tube under argon shield by a centrifugal casting method. The electromagnetic stirring medium-frequency induction furnace conducts the smelting, the deoxidizing agent is added for deoxidization, and precipitate deoxidization and diffusion deoxidization are combined, so that the components of the molten steel are uniform, no oxidation exists, and a deoxidization effect is good. In addition, the centrifugal casting method is adopted, so that the production cost is saved, and the production efficiency is improved.

Description

[0001] technical field [0002] The invention belongs to the technical field of alloy smelting, and in particular relates to a production method for a novel nickel-based furnace tube used in a high-temperature device of a petrochemical system. [0003] Background technique [0004] At present, the radiant section furnace tube in the high temperature device of the petrochemical system needs to meet the requirements of high temperature (900°C-1100°C), high pressure, carburization resistance, and high temperature metal powdering resistance. Currently, the alloy material for the radiant section furnace tube is generally Inconel alloy690 rolling material is used, and there is no manufacturer of this material in our country, so it depends on imports in this respect, and the price is expensive. In addition, Inconel alloy690 rolling material has disadvantages such as poor high temperature performance and large thermal deformation. At present, there are no reports and introductions ...

AI Technical Summary

Problems solved by technology

[0004] At present, the radiant section furnace tube in the high temperature device of the petrochemical system needs to meet the requirements of high temperature (900°C-1100°C), high pressure, carburization resistance, and high temperature metal powdering resistance. Currently, the alloy material for the radiant section furnace tube is generally Inconel alloy690 rolling material is used, and there is no manufacturer of this material in my country, so it is all imported in this respect, and the price is expensive. In addition, Inconel alloy690 rolling material has disadvantages such as poor high temperature performance and large thermal deformation.

At present, there are no reports and introductions at home and abroad to produce furnace tubes equivalent to Inconel alloy690 by casting methods