Production technology of stainless steel tube

Abstract

A production process for stainless steel pipes, characterized in that it includes the following steps: cutting the steel into steel coils of different thicknesses according to the preparation requirements, and inspecting the steel coils; loosening the screws of the fixing plate of the feeding rack and taking off the fixing plate, Turn the loading rack expander to the "shrink" position, then use the crane to send the steel coil to the material rack, turn the expander to the "expand" position, fix the steel coil, and install the loading rack fixing plate And lock the screw, the brake chain of the material rack must be properly tightened; the present invention adopts different methods for cutting according to the thickness of the steel, and uses different welding torches according to the thickness of the steel, and controls the air flow of the welding torch to make the welding temperature balanced and the welding effect Good, the molding effect is good, the quality of the product is greatly improved, the defective rate of the product is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of stainless steel pipe processing, in particular to a production process of stainless steel pipes. Background technique [0002] In the domestic market, stainless steel pipes are generally divided into two types, medium and low-grade general-purpose pipes and high-grade special-purpose pipes. The production process of low- and medium-grade precision welded stainless steel pipes is traditional, and its main improvement direction is to meet domestic quality standards as much as possible. High-grade precision welded stainless steel pipes have high requirements on the performance of pipes. According to different usage conditions, specific performance needs to meet the requirements of international standards. Therefore, continuous innovation and continuous progress must be made in the preparation process in order to adapt to the ever-improving international standards. However, the manufacturing process of stai...

AI Technical Summary

Problems solved by technology

However, the manufacturing process of stainless steel pipes is a collection of multiple steps as a whole. The effect of improving a certain process is limited, and the semi-finished products after each step have corresponding standards. Being able to do better in every link is the main goal of improving the preparation process of stainless steel pipes

In the traditional process, the degree of attention to polishing is not enough, and the pipe blank is not aware of the importance of the quality of the final product; in terms of cold rolling, the traditional process has the problems of large bending deformation, low pass rate and large hardness fluctuation range after heat treatment , if you want to obtain high hardness and require heat treatment to have small bending deformation, you must use milder cooling methods, such as hot bath step quenching, air cooling quenching, etc., but the hardness does not meet the requirements of HRC60 ~ 62

In the traditional process, (pickling uses the hydrofluoric acid and nitric acid solution of the pickling waste tank, mainly through corrosion and peeling to achieve the purpose of degreasing, which will not only degrease the surface of the steel pipe, but also cause corrosion on the surface of the steel pipe. This reduces the corrosion resistance of steel pipes. This is an extremely unreasonable way, and there are shortcomings such as over-pickling and under-pickling. Each pool of the pickling process needs a special person to take care of its process time.

) The traditional process of cleaning the inner wall of the pipe only uses a high-pressure water gun for simple flushing, which has a poor cleaning effect, wastes water resources, and is inefficient