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Stainless steel elbows are used in different occasions, so they have various shapes, and the processing methods of stainless steel elbows are also different. The main processing technology methods of domestic stainless steel stamping elbow pipe fittings: conventional semi-continuous hot rolling, CSP continuous casting and rolling , medium plate unit and coil unit. The following is an introduction to the four processing techniques for stainless steel elbows:

A. Semi-continuous rolling mill: including 1-stand steckel rolling mill and 5-stand finishing mill. On a semi-continuous rolling mill, the hot rolling experienced by the tube in the finishing pass is substantially constant from one end of the tube to the other. The technological feature is that there is central segregation in the continuous casting thin slab, and the central segregation of the continuous casting thin slab is a key technical problem to further improve the quality of stainless steel stamping elbow pipe fittings;

B. Steckel rolling mill: Steckel rolling mill includes a reciprocating rough rolling mill and a 4-high reciprocating finishing mill. Two hot coil rolling mills are installed on the conveying lines on both sides of the finishing mill. On the coil rolling mill, the thermomechanical history of stainless steel stamping elbow pipe fittings changes significantly over the entire length, especially in the production of micro stainless steel stamping elbow pipe fittings, which will strongly affect the degree of recrystallization, grain growth and Precipitation, and lead to drastic changes in the final microstructure and properties throughout the length of the stainless steel stamping elbow fitting;

C. Medium and heavy plate unit: mainly produces wide and thick plates, which are used in the production of LSAW pipes, and LSAW pipes are widely used in the trunk line of oil and gas high-pressure transmission;

D. CSP continuous casting and rolling: In the CSP production line, the low-carbon manganese steel containing niobium, vanadium and titanium composite microalloying is adopted with appropriate controlled rolling, controlled cooling and coiling process, which can improve the mechanical properties and microstructure of the pipe fittings. It meets the technical requirements of modern X60 stainless steel stamping elbows and the development trend of modern stainless steel stamping elbow pipe fittings.

Stainless steel elbow production standards and characteristics

Usually, what we call stainless steel elbows are mainly made of stainless steel, and its stainless steel material has a chromium content of at least 10.5%, and steel with a carbon content of no more than 1.2% is the standard. When producing stainless steel elbows, attention should be paid The following relevant standards:

1. According to the manufacturing standard, it can be divided into national standard, ship standard, electric standard, water standard, American standard, German standard, Japanese standard, Russian standard and so on.

2. According to the production method, it can be divided into pushing, pressing, forging, casting, etc.