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Process of preparing high-chromium alloy supper 13-Cr seamless steel tubes through CPE (cross-roll piercing and elongation) hot rolling mill

A technology of seamless steel pipe and high chromium alloy, which is applied in the field of metal rolling to achieve the effect of small deformation resistance, fast deformation speed and guaranteed product quality

Active Publication Date: 2014-04-23
JIANGSU CHANGBAO STEELTUBE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a process for preparing high-chromium alloy super 13Cr seamless steel pipes by a hot rolling CPE unit. This process controls the temperature in the process so that the steel pipes are The deformation resistance is small, the deformation speed is fast, and the inner surface is not easy to form defects, thus ensuring the product quality of the steel pipe

Method used

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  • Process of preparing high-chromium alloy supper 13-Cr seamless steel tubes through CPE (cross-roll piercing and elongation) hot rolling mill
  • Process of preparing high-chromium alloy supper 13-Cr seamless steel tubes through CPE (cross-roll piercing and elongation) hot rolling mill
  • Process of preparing high-chromium alloy supper 13-Cr seamless steel tubes through CPE (cross-roll piercing and elongation) hot rolling mill

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Embodiment Construction

[0024] In order to make the content of the present invention easier to be understood clearly, the following further describes the present invention in detail based on specific embodiments in conjunction with the accompanying drawings.

[0025] The finished steel pipe specifications of this embodiment: φ88.9×6.45×10000-11500mm;

[0026] Tube billet specifications: φ125×1630mm;

[0027] Billet material: 13Cr;

[0028] The general steps of the manufacturing process are: bright tube → pickling and grinding → tube blank material cutting → cold centering → tube blank preheating → ring furnace heating → tube blank perforation → capillary necking → tube jacking → loose rod → stripping →Hot sawing→Reheating→Tension reduction→Cooling bed cooling→Table inspection→Flaw detection→Packing and storage.

[0029] A process for preparing a high-chromium alloy super 13Cr seamless steel pipe by a hot-rolling CPE unit. The process steps are as follows:

[0030] a) Provide a tube blank;

[0031] b) After pick...

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Abstract

The invention discloses a process of preparing high-chromium alloy super 13-Cr seamless steel tubes through a CPE hot rolling mill. The process comprises the steps of a), providing a tube blank; b) performing acid pickling and coping on the tube blank and then fracturing the tube blank to form a plurality of split tube blanks; c), performing cold centering on the split tube blanks; d), preheating the cold-centered split tube blanks and performing thermal preservation for a certain time; e) heating the preheated split tube blanks, performing thermal preservation for a certain time, and then performing soaking treatment on the split tube blanks and performing thermal preservation for a certain time, wherein the heating environmental temperature is controlled to be 800-900 DEG C, and the soaking environmental temperature is controlled to be 1200-1010 DEG C; f), punching the split tube blanks processed in the step e) through a punching machine to obtain tube billets, controlling the temperature of the punched tube billets to be 1230-1240 DEG C, and then reducing the tube billets. According to the process of preparing high-chromium alloy super 13-Cr seamless steel tubes through the CPE hot rolling mill, the temperature during the process is controlled, so that the steel tubes have small deformation resistance and high deformation speed and can avoid internal surface flaws during the preparation process, and further the product quality of the steel tubes can be guaranteed.

Description

Technical field [0001] The invention relates to a process for preparing a high-chromium alloy super 13Cr seamless steel pipe by a hot rolling CPE unit, which belongs to the technical field of metal rolling. Background technique [0002] At present, the hot rolling mill forming process of the existing high-chromium alloy super 13Cr stainless steel tubing has always been blank for the hot rolling CPE mill forming process. And for this steel type, there are problems such as large deformation resistance, slow deformation speed during the forming process of other types of hot rolling mills, high temperature control accuracy requirements during the rolling process, and easy formation of internal surface defects. Summary of the invention [0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a process for preparing high-chromium alloy super 13Cr seamless steel pipes by a hot rolling CPE unit. The process controls ...

Claims

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Application Information

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IPC IPC(8): B21B23/00B21B37/78
Inventor 许才斌王剑平李中福薛灿明李珺
Owner JIANGSU CHANGBAO STEELTUBE CO LTD
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