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The stamping process and characteristics of stainless steel elbows.
Release time:
10 Jan,2022
Stainless steel elbows are used in different situations, thus they come in various shapes, and the processing methods for stainless steel elbows also vary. The main processing techniques for domestically produced stainless steel stamped elbow fittings include: conventional semi-continuous hot rolling, CSP continuous casting and rolling, medium plate mills, and coil mills.
Stainless steel elbows are used in different occasions, thus they come in various shapes, and the processing methods for stainless steel elbows also vary. The main processing techniques for domestically produced stainless steel stamped elbow fittings include: conventional semi-continuous hot rolling, CSP continuous casting and rolling, medium plate mills, and coil mills. Below are four processing techniques for stainless steel elbows:
A. Semi-Continuous Rolling Mill: This includes a 1-stand Steckel mill and a 5-stand finishing mill. In the semi-continuous rolling mill, the hot rolling experienced by the pipe in the finishing pass is basically constant from one end of the pipe to the other. The process characteristic is that the center segregation exists in the continuously cast thin slab, and the center segregation of the continuously cast thin slab is a key technical issue for further improving the quality of stainless steel stamped elbow fittings;
B. Steckel Mill: The Steckel mill includes a reciprocating roughing mill and a 4-roll reciprocating finishing mill. Two hot rolling mills are installed on the conveying line on both sides of the finishing mill. In the coil rolling mill, the thermal-mechanical history of the stainless steel stamped elbow fittings varies significantly along the entire length, especially in the production of micro stainless steel stamped elbow fittings, which will strongly affect the degree of recrystallization, grain growth, and precipitation, leading to drastic changes in the final structure and performance of the entire stainless steel elbow joint;
C. Medium and Heavy Plate Mill: Mainly produces wide and thick plates, used for producing LSAW pipes, which are widely used in high-pressure oil and gas transmission pipelines;
D. CSP Continuous Casting and Rolling: In the CSP production line, low-carbon manganese steel with niobium, vanadium, and titanium composite micro-alloying is used, combined with appropriate control of rolling, cooling, and coiling processes, which can improve the mechanical properties and microstructure of the fittings. It meets the technical requirements of modern X60 stainless steel stamped elbows and the development trend of modern stainless steel stamped elbow fittings.
Standards and Characteristics of Stainless Steel Elbow Production:
Generally, what we refer to as stainless steel elbows are mainly made of stainless steel, with a chromium content of at least 10.5% and a carbon content not exceeding 1.2%. When producing stainless steel elbows, the following relevant standards should be noted:
1. According to manufacturing standards, they can be divided into national standards, ship standards, electrical standards, water standards, American standards, German standards, Japanese standards, Russian standards, etc.
2. According to production methods, they can be divided into pushing, pressing, forging, casting, etc.
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The company's products mainly include three series and more than 100 varieties: main ceramic wear-resistant pipes, pipe fittings, bimetal surfacing wear-resistant pipes, elbows, elbows, tees, crosses, reducers, pipe caps, flanges, supports and hangers, waterproof sleeves, corrugated compensators, etc.
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