Manufacturing method of high-chrome cast iron alloy

Abstract

The invention discloses a manufacturing method of a high-chrome cast iron alloy. The method comprises the steps of: A, preparing materials; B, smelting, namely, pumping vacuum for a smelting furnace;and feeding the materials prepared in step A into the vacuum-pumped smelting furnace for smelting; C, pouring; D, cooling, namely, cooling a casting obtained in step C in an air cooling manner; then cooling in a water cooling manner; and condensing though a condensing device; E, annealing; and F, quenching. The method has the beneficial effects: the content of chrome is reasonably limited, and theratio of chrome to carbon is specifically limited, and meanwhile, other material components with proper ratio are selected, and the vacuum is pumped before smelting, so that solutions can be uniformly dissolved; in addition, the cooling performed after pouring is performed in three modes in a step-by-step manner, so that the casting quality is ensured, and the manufactured protecting board is high in hardness and intensity, and outstanding in toughness; the protecting board realizes the corrosion resisting performance, the impact resisting performance and other performances; and all requirements on the mechanical performances in the shot blasting process can be met.

Description

technical field [0001] The invention relates to a method for manufacturing a guard plate for a shot blasting chamber, in particular to a method for manufacturing a high-chromium cast iron alloy. Background technique [0002] The shot blasting machine uses a high-speed rotating shot blaster to spray the projectile at high speed, so that the projectile has a certain kinetic energy, and the high-speed linear motion projectile directly impacts on the surface of the workpiece to remove the rust on the surface of the workpiece, but the shot blasting machine is running During the shot blasting process, the projectile will bypass the workpiece and hit the chamber of the shot blasting machine. After a long time, the high-speed projectile will penetrate the chamber. Therefore, in the prior art, protective plates are often laid in the chamber of the shot blasting machine. There are many types of protective plates, generally high-chromium cast iron or manganese steel plates are used, bu...

AI Technical Summary

Problems solved by technology

[0002] The shot blasting machine uses a high-speed rotating shot blaster to spray the projectile at high speed, so that the projectile has a certain kinetic energy, and the high-speed linear motion projectile directly impacts on the surface of the workpiece to remove the rust on the surface of the workpiece, but the shot blasting machine is running During the shot blasting process, the projectile will bypass the workpiece and hit the chamber of the shot blasting machine. After a long time, the high-speed projectile will penetrate the chamber. Therefore, in the prior art, protective plates are often laid in the chamber of the shot blasting machine. There are many types of protective plates, generally high-chromium cast iron or manganese steel plates are used, but in the face of high-speed jet projectiles, the strength of the existing protective plates is still not good enough due to material problems, and the service life is not long. It will be replaced after a certain period of time, which will not only cause a waste of cost but also delay the construction period and affect production efficiency