Research shows that the mechanical and pitting corrosion properties of A106 B American standard seamless steel pipes with different tempering temperatures are also quite different. The same type and quantity of precipitation at different temperatures is an important reason that affects the corrosion ability and impact toughness. The strengthening and toughening mechanism of A106 B American standard seamless pipe steel under sub-temperature heat treatment is compared with the mechanical properties of 40Cr steel after conventional heat treatment. The results show that A106B American standard seamless pipe under sub-temperature heat can improve the impact toughness of 40Cr steel. , Reduce the ductile-brittle transition temperature of 40Cr steel and inhibit the brittleness of tempering of 40Cr steel.
In the process of using A106 B American standard seamless steel pipes, you must know different materials, then A106B American standard seamless steel pipes have different properties. In the process of using A106B American standard seamless steel pipes, you want better To use it, it is necessary to be able to understand the quality of its A106B American standard seamless steel pipe for different materials and so on. The general A106B American standard seamless steel pipe has good compactness, corrosion resistance and so on during use.
A106B seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, and extruded pipes according to different production methods.
1. Hot-rolled seamless tubes are generally produced on automatic tube rolling mills. The solid tube is inspected and cleaned of surface defects, cut to the required length, centered on the perforated end of the tube, and then sent to the heating furnace for heating and piercing on the punching machine. When the perforation continuously rotates and advances at the same time, under the action of the roller and the plug, a cavity is gradually formed inside the tube blank, which is called a capillary tube. And then sent to the automatic rolling mill to continue rolling. Finally, the entire wall thickness is uniformed by the whole machine, and the diameter is sizing by the sizing machine to meet the specifications. The use of continuous tube rolling mills to produce hot-rolled a106b seamless steel tubes is a more advanced method.
2. If you want to obtain seamless pipes with smaller size and better quality, cold rolling, cold drawing or a combination of the two methods must be used. Cold rolling is usually carried out on a two-high rolling mill. The steel pipe is rolled in an annular pass formed by a variable cross-section circular hole groove and a stationary tapered plug. Cold drawing is usually performed on a single-chain or double-chain cold drawing machine of 0.5-100T.
3. In the extrusion method, the heated tube blank is placed in a closed extrusion cylinder, and the perforated rod and the extrusion rod move together to extrude the extruded part from the smaller die hole. This method can produce steel pipes with smaller diameters.
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