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Manufacturing process of small-caliber hot rolling seamless steel tubes

A technology of seamless steel pipe and manufacturing process, applied in the direction of metal rolling, etc., can solve the problems of low yield rate, environmental pollution, high energy consumption of manufacturing process, etc., and achieve the effect of high yield rate and low environmental pollution

Inactive Publication Date: 2011-04-13
胡顺珍
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] The traditional manufacturing process of producing small-diameter seamless steel pipes below 76mm adopts piercing, pickling, and cold-drawing processes to produce small-diameter seamless steel pipes. This backward manufacturing process has high energy consumption, low yield, and pollutes the environment.

Method used

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  • Manufacturing process of small-caliber hot rolling seamless steel tubes
  • Manufacturing process of small-caliber hot rolling seamless steel tubes

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Embodiment Construction

[0020] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] like figure 1 As shown, the small-diameter hot-rolled seamless steel pipe manufacturing process provided by the present invention comprises the following steps:

[0022] Heating The tube blank is heated in a heating furnace;

[0023] The heating furnace can be an inclined bottom heating furnace, an annular heating furnace, or a walking heating furnace, and the heating temperature range is 1100-1280°C.

[0024] Piercing Set up a piercing machine to pierce and roll the heated tube blank;

[0025] The piercer can be a vertical fungus piercer or a Diesel vertical piercer.

[0026] In 5-stand continuous rolling, the...

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Abstract

The invention discloses a manufacturing process of a small-caliber hot rolling seamless steel tubes, which is used for solving the problems of high energy consumption, low finished product rate and environmental pollution of the traditional process for producing the small-caliber hot rolling seamless steel tubes through punching plus cold drawing. The manufacturing process of the small-caliber hot rolling seamless steel tubes comprises the following steps of: heating: heating tube blanks in a heating furnace; punching: punching the heated tube blanks by installing a puncher; five rack tandem rolling: previously punching punched hollow billets on a retained mandrel, and carrying out continuously extending rolling on the punched hollow billets through a continuously arranged five rack retained mandrel tube tandem rolling mill; three rack tube disassembly: disassembling pierced billets subjected to five tandem rolling from the retained mandrel to enter a next process-twenty-eight rack tension reducing process; twenty-eight rack tension reduction: placing the pierced billets subjected to the five tandem rolling into twenty-eight three-roller tension reducing racks for rolling so as to form hot finished steel tubes; and finishing: finishing the hot finished steel tubes to form finished steel tubes.

Description

technical field [0001] The invention relates to a small-diameter hot-rolled seamless steel pipe manufacturing process, which belongs to the technical field of metal rolling. Background technique [0002] The traditional manufacturing process of producing small-diameter seamless steel pipes below 76mm adopts piercing, pickling, and cold-drawing processes to produce small-diameter seamless steel pipes. This backward manufacturing process has high energy consumption, low yield, and pollutes the environment. Contents of the invention [0003] The purpose of the present invention is to provide a manufacturing process for producing small-diameter seamless steel pipes using the internationally advanced MIN-MPM continuous rolling technology with few stands and limited mandrel. [0004] In order to realize the purpose of the above invention, the present invention adopts the following technical scheme: the manufacturing process of producing small-diameter hot-rolled seamless steel p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B23/00
Inventor 胡顺珍王彦飞董丽君曹康乐解建波
Owner 胡顺珍
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