When chromium – nickel austenitic stainless steel is heated to the temperature range of 450-800 C, corrosion often occurs along the grain boundary, which is called intergranular corrosion. Generally speaking, intergranular corrosion is actually carbon element precipitated from Cr23C6 in the metallographic structure of saturated austenite, resulting in poor austenite structure at grain boundaries. Therefore, it is […]
Factors to be paid attention to in the process of solid solution processing for stainless steel pipes
During the process of solid solution treatment, stainless steel pipes need to pay attention to the influence of protective atmosphere, temperature and cooling speed. The first is the light online solution treatment procedures, stainless steel pipe in the production process caused by rolling, drawing and welding heat effect, will lead to pipe structure and mechanical property will […]
What are the difficulties in the welding process of the duplex stainless steel 2205
There are some technological difficulties in the actual welding of duplex stainless steel 2205, but in fact, if we grasp 2205 of the related material characteristics, many problems will be solved when welding is processed. Here are the following aspects. First, compared with the first generation duplex stainless steel, 2205 has further increased the nitrogen content, […]
Passivation purpose and method of stainless steel pipe for water supply
Usually the stainless steel pipe as the water supply pipeline before, in the process there will be a passivation process, its purpose is to protect the formation of chromium oxide coating on the inner wall of stainless steel pipe with smooth surface, so that it can resist high temperature of liquid on the surface of stainless steel […]
Performance comparison between stainless steel pipe and other water supply pipe materials
At present, most of the water pipes are concealed and pipe wells. If the material selection is wrong, it is likely to cause huge losses. The common water supply materials include stainless steel pipes, copper pipes, galvanized pipes, composite pipes and plastic pipes. Next, we will compare these materials to see which material is the most suitable. […]
Surface treatment process of stainless steel pipeline
Improving the surface quality of stainless steel pipelines, including improving the surface morphology and structure, and reducing the number of layers, the common surface treatment methods at present are mechanical drawing, mechanical lapping, polishing and burning. Mechanical drawing The mechanical drawing is to increase the surface roughness of the pipeline by using the plug bolt precision […]
Operation process of stainless steel mirror polishing process
The polishing process of stainless steel mirror surface mainly consists of two main processes: grinding and light out. The following are the respective operation steps. Polish The goal of grinding the stainless steel welded pipe fitting is to remove the solder joints, to achieve the surface roughness of the R10um pipe fitting, so as to make the […]
Methods of preservation of stainless steel pipes that are not easy to be corroded
In fact, stainless steel pipes will not rust, but rust resistance is very high, so it is very difficult to rust, but if the storage method is not appropriate, the rust will happen. This paper will talk about how to keep it as long as possible to make the stainless steel pipe in the best condition. Choose […]
What are the production characteristics of stainless steel welded pipe
A stainless steel pipe with a diameter of less than 219mm is used in continuous roll forming, which is basically similar to that of a high frequency welded pipe. When the diameter of the tube is greater than 219mm, the pressure forming or spiral welding is used. The tube diameter is less than 4.76mm, and the tube […]
What are the production characteristics of stainless steel seamless steel pipes
There are four kinds of stainless steel seamless steel pipe production methods: hot rolling, hot extrusion, cold rolling and cold drawing. Their production characteristics from plastic deformation resistance, and spread, several aspects of this application and the sensitive degree of thermal conductivity and oxidation resistance of observation. The following are described in detail. Plasticity Martensitic stainless steel […]
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