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Process for thin-wall hot-rolled seamless steel tube in double mandrel two-roll rotary rolling production

A technology of seamless steel pipes and double mandrel rods, applied in metal rolling, manufacturing tools, metal rolling, etc., can solve the problems of seamless steel pipe production and manufacturing capacity, low quality, irregular radial structure cracking and deformation, and production efficiency Low-level problems, to achieve the effect of improving production efficiency and quality, prolonging wear life, and improving precision

Inactive Publication Date: 2017-06-13
CHANGGE YIMING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the low production efficiency, high energy consumption, low yield, serious environmental pollution, small amount of wall reduction, and only medium-thick-wall seamless steel pipes in the prior art. Seam steel pipes are prone to irregular rolling cracks and deformations in the radial structure, and the production capacity and quality of seamless steel pipes are low. However, to provide a seamless steel pipe that can be rolled at a higher temperature after piercing, the steel pipe structure is not easy to appear Cracking, seamless steel pipe production efficiency, high quality, low production cost, a double-mandrel two-roll cross-rolling production process for thin-walled hot-rolled seamless steel pipes

Method used

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  • Process for thin-wall hot-rolled seamless steel tube in double mandrel two-roll rotary rolling production
  • Process for thin-wall hot-rolled seamless steel tube in double mandrel two-roll rotary rolling production
  • Process for thin-wall hot-rolled seamless steel tube in double mandrel two-roll rotary rolling production

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Effect test

Embodiment 1

[0045] Such as Figure 1 to Figure 4 Shown, a kind of technology of thin-walled hot-rolled seamless steel pipe in the production of double-mandrel two-roll cross-rolling, comprises the following steps:

[0046] Step 1), heating, heating the tube billet to above 1200°C in the tube billet heating furnace;

[0047] Step 2), piercing, the heated tube blank is pierced by the piercing unit to make a capillary tube;

[0048] Step 3), material transfer and secondary heating, the capillary tube made by the piercing unit is sent into the secondary heating furnace through the material transfer mechanism, and advances at a speed of 0.5m / s-1.5m / s in the secondary heating furnace. Carry out secondary heating and soaking, and the temperature after secondary heating is 900°C; the secondary heating furnace is a long straight furnace, which adopts gas heating or electric heating, and there are multiple sets of V-shaped straight lines in the secondary heating furnace. wheel, and powered by mot...

Embodiment 2

[0058] Such as Figure 1 to Figure 4 Shown, a kind of technology of thin-walled hot-rolled seamless steel pipe in the production of double-mandrel two-roll cross-rolling, comprises the following steps:

[0059] Step 1), heating, heating the tube billet to above 1200°C in the tube billet heating furnace;

[0060] Step 2), piercing, the heated tube blank is pierced by the piercing unit to make a capillary tube;

[0061] Step 3), material transfer and secondary heating, the capillary tube made by the piercing unit is sent into the secondary heating furnace through the material transfer mechanism, and advances in the secondary heating furnace at a speed of 0.5m-1.5m per second for the secondary heating. Secondary heating and soaking, the temperature of the secondary heating is heated to 950°C. The secondary heating furnace is a long straight furnace, which adopts gas heating or electric heating. There are multiple sets of V-shaped wheels arranged in a straight line in the seconda...

Embodiment 3

[0071] Such as Figure 1 to Figure 4 Shown, a kind of technology of thin-walled hot-rolled seamless steel pipe in the production of double-mandrel two-roll cross-rolling, comprises the following steps:

[0072] Step 1), heating, heating the tube billet to above 1200°C in the tube billet heating furnace;

[0073] Step 2), piercing, the heated tube blank is pierced by the piercing unit to make a capillary tube;

[0074] Step 3), material transfer and secondary heating, the capillary tube made by the piercing unit is sent into the secondary heating furnace through the material transfer mechanism, and advances in the secondary heating furnace at a speed of 0.5m-1.5m per second for the secondary heating. Secondary heating and soaking, the temperature of the secondary heating is heated to 1000°C. The secondary heating furnace is a long straight furnace, which adopts gas heating or electric heating. There are multiple sets of V-shaped wheels arranged in a straight line in the second...

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Abstract

The invention relates to the technical field of production and processing of seamless steel pipes, and in particular relates to a process for a thin-wall hot-rolled seamless steel tube in double mandrel two-roll rotary rolling production, the thin-wall hot-rolled seamless steel tube is capable of performing two-roll rotary rolling at a high remaining temperature after perforation, the seamless steel tube has the advantages of high production efficiency, high quality and low production cost, a perforated hollow billet is secondarily heated, then a mandril passes through the hollow billet in advance, while the mandril passes through the hollow billet in advance, a lubricant is sprayed, the mandril sprayed with the lubricant passes through the hollow billet, then enters a two-roll rotary rolling set for rolling, a rolled pierced billet enters a three-time heating furnace for three times of heating, after the three times of heating, a hot finished tube is formed by reducing, sizing and shaping, and a finished tube formed by cooling of the hot finished tube is straightened, copped, inspected, packed, labeled, and stored to form a commercial tube, roll burst of the horizontal tissue of the seamless steel tube rolled by the process is not easy to produce, black threads are not easy to produce, the outer diameter sizes of the front end and the back end are improved by 25%, and the accuracy is increased by 20%.

Description

technical field [0001] The invention relates to the technical field of production and processing of seamless steel pipes, in particular to a seamless steel pipe that can be cross-rolled by two rolls at a relatively high temperature after piercing. The seamless steel pipe has high production efficiency, high quality and low production cost. The process of thin-walled hot-rolled seamless steel pipes in the production of mandrel two-roll cross-rolling. Background technique [0002] The production of seamless steel pipes in my country ranks among the top in the world and has become a big country in the production of seamless steel pipes. The country has various types of seamless steel pipe hot-rolled cold-rolled and cold-drawn units, especially the production of medium and thin-walled seamless steel pipes basically relies on traditional cold-rolling techniques. The cold-drawing production process has low production efficiency, high energy consumption, low yield, and pickling wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21B19/02B21B25/00
CPCB21B19/02B21B25/00B21C37/06
Inventor 王国亮翦铁明
Owner CHANGGE YIMING MACHINERY
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