High-strength thin-wall stainless steel hexagonal seamless tube and manufacturing method thereof
A manufacturing method, hexagonal technology, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of relatively single, limited range of deformation setting, limited room for adjustment of performance index specification parameters, etc., and achieve high strength , high dimensional accuracy, and high surface finish
Active Publication Date: 2021-04-23
JIANGSU YINHUAN PRECISION STEEL TUBE CO LTD
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Problems solved by technology
In this way, only cold rolling deformation is used in the round tube stage, which is relatively simple, and there is limited room for adjustment of performance indicators and specifications. Finally, the cold-rolled special-shaped tube is formed by one-time multi-roll cold rolling. The upper deformation is not uniform, so the deformation setting is limited by the material, especially for materials with high cold hardening strength such as stainless steel, the setting range of the deformation is more limited, resulting in limited strength performance of the final product
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Embodiment 1
[0031] This embodiment provides as figure 1 As shown, the obtained wall thickness is 3±0.05mm, the inner side distance is 109±0.10mm, it is a thin-walled seamless pipe, the surface roughness after molding is ≤0.8μm, the material grade is TP304, and the tensile strength at room temperature is 1100-1250Mpa The thin-walled stainless steel hexagonal seamless tube with a closed regular hexagonal cross-sectional area, high surface finish, high dimensional accuracy, and high strength includes the following steps:
[0032] Step 1: Process the intermediate product according to the specification of TP304 blank pipe blank, after at least 2 times of cold rolling and at least 1 time of cold drawing deformation and heat treatment, process to the specification of Φ168×8mm before the last intermediate product round pipe, the amount of cold rolling deformation The setting is 50~70%, the cold drawing deformation is set at 20~30%, the heat treatment process temperature range is 1050~1150°C, and ...
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Abstract
The invention discloses a high-strength thin-wall stainless steel hexagonal seamless tube and a preparation method thereof. The hexagonal seamless tube is formed by conducting multi-pass cold rolling or cold drawing deformation and heat treatment on a tube blank raw material and then conducting two-step multi-roll precision cold rolling forming, the cross sectional area of each position of the formed hexagonal seamless tube is in a closed regular hexagon shape, and the wall thickness is 1.0 millimeter-3. 5 millimeters; the inner opposite side distance is 40 millimeters-120 millimeters, the surface roughness of the formed hexagonal seamless tube is smaller than or equal to 0.8 micrometer, the wall thickness tolerance is + / -0.05 millimeter, and the inner opposite side distance tolerance is + / -0.10 millimeter. The hexagonal seamless tube has the advantages of being high in surface smoothness and high in size precision, and the high-strength thin-wall stainless steel hexagonal seamless tube with flexible and variable specifications of intermediate round tubes and high surface smoothness, high dimensional precision and high strength of finished special-shaped tubes is prepared.
Description
technical field [0001] The invention relates to a stainless steel hexagonal seamless pipe and a manufacturing method thereof, in particular to a high-strength thin-walled stainless steel hexagonal seamless pipe and a manufacturing method thereof. Background technique [0002] Special-shaped seamless pipes, especially hexagonal special-shaped seamless pipes, are widely used in many fields due to their special cross-sectional shapes. Especially in recent years, with the development of nuclear energy technology, in some special parts, hexagonal special-shaped seamless pipe has its unique advantages. Due to the particularity of the use environment, higher and higher requirements are put forward for the surface finish, dimensional accuracy and strength of the pipe. [0003] Traditional stainless steel and alloy hexagonal seamless tubes are usually manufactured by machining or cold drawing, which is difficult to meet the requirements of high surface finish, high dimensional accur...
Claims
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Login to View More IPC IPC(8): B21B19/10B21C1/22B21B15/00
Inventor 曾凡博吴青松高佩汤云飞
Owner JIANGSU YINHUAN PRECISION STEEL TUBE CO LTD