Manufacturing process and welding method of wear-resistant and impact-resistant shakeout pipe

Abstract

The invention discloses a manufacturing method and a welding method for a wear-resistant shock-resistant shakeout pipe. A unique carburizing quenching processing technology is employed and comprises: heating steel to 900-950 DEG C along with the temperature of a furnace, drawing in methane or ethane environment, performing carburizing processing for 5-7 h, and employing oil cooling and water cooling for alternative cooling. The invention also disclosed the welding method for the wear-resistant shock-resistant shakeout pipe. A steel-shot accumulation zone is additionally arranged at the bottom of the shakeout pipe and has the depth of 50-100 mm, when steel shots flows downwards through a steel-shot inlet pipe, the steel shots directly impact accumulated steel shots at the steel-shot accumulation zone, so that the impact force to the pipe wall is reduced. The manufacturing method and the welding method for the wear-resistant shock-resistant shakeout pipe are capable of improving the hardness and wear resistance of the shakeout pipes, also welding stress is removed, so that weld joints are firm and not easy to crack, also impact force to the bend position of the shakeout pipe is reduced, and the service life of the shakeout pipe is prolonged.

Description

technical field [0001] The invention belongs to the field of material surface processing, and relates to a sand-out pipe for a shot blasting machine, in particular to a manufacturing process and a welding method for a wear-resistant and impact-resistant sand-out pipe. Background technique [0002] At present, the existing shakeout pipes are generally made by direct bending of a steel pipe. Since this kind of product uses ordinary steel, after bending and stretching, the material of the bent part is stretched and thinner than other parts, and when the steel sand When it flows down, it also directly impacts the bent part of the shakeout pipe, which causes serious wear and tear on the bent part and is easily damaged. Once the bent part is damaged, the shakeout pipe is often directly scrapped and cannot be used again, resulting in great waste. [0003] If the method of directly bending the steel pipe is not used, but the two ends of the thickened curved steel pipe are welded to ...

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Problems solved by technology

[0002] At present, the existing shakeout pipes are generally made by direct bending of a steel pipe. Since this kind of product uses ordinary steel, after bending and stretching, the material of the bent part is stretched and thinner than other parts, and when the steel sand When it flows down, it also directly impacts the bent part of the shakeout pipe, which causes serious wear and tear on the bent part and is easy to be damaged. Once the bent part is damaged, the shakeout pipe is often scrapped directly and cannot be used again, resulting in great waste

[0003] If the method of directly bending the steel pipe is not used, but the two ends of the thickened curved steel pipe are welded to the straight steel pipe separately, due to the deterioration of the material properties caused by welding in the traditional welding process, the original performance of the weldment or the welding seam will be affected. Due to the joint action of welding stress or other brittle factors, cracks and pores are generated, which are easy to break and fall off during use, and high temperature and a large amount of harmful gas are generated during the welding process, which is neither energy-saving nor environmentally friendly. Injuries caused by staff, endangering health

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