Method for manufacturing pure titanium seamless tubes

A manufacturing method and seamless pipe technology, applied in the direction of roll speed control, metal rolling, etc., can solve the problems of difficulty in meeting the needs of large-scale industrial production, long manufacturing process, large consumption of metal and tools and molds, etc., and meet the requirements of large-scale production. Industrial production, good product quality, good surface quality effect

Active Publication Date: 2010-05-19
PANGANG GROUP SICHUAN CHANGCHENG SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the method of manufacturing pure titanium pipe mainly adopts extrusion+cold rolling method. The process technology of this method is easy to master, but the process flow of extrusion method is more, especially the production process of ingot billet is long, which is difficult for billet. Peeling and drilling the center guide hole, the loss is large, the general extrusion yield is only 75%, the production efficiency is low, the cost is high, the investment is large, the consumption of metal and tools is large, and it is difficult to meet the needs of large-scale industrial production.

Method used

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  • Method for manufacturing pure titanium seamless tubes

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Embodiment 1

[0039] A method for manufacturing a pure titanium seamless pipe, comprising the following steps:

[0040] a. Preparation of tube billets and rods: smelting sponge titanium (grade 1 or grade 2 sponge titanium) in a vacuum consumable electric arc furnace into finished titanium ingots, and then forging (rolling) into tube blanks and rods, tube blank rods The diameter of the material is φ50~φ130mm;

[0041] b. Machining of tube billets and bars: Saw the tube billets and bars (using a grinder, etc.) to grow a billet with a length of 650-4500mm; then use a horizontal centering machine for centering, and the centering hole range is φ18±0.5~ φ30±0.5mm; then use a peeling locomotive to lighten the surface defects of the blank;

[0042] c. Cross-rolling piercing: heat the billet to 700-980°C, use a two-roll cross-rolling unit to perforate 1-2 times, use molybdenum plugs or water-cooled plugs, the inclination angle of the piercing rolls is 8°, and the number of roll rotations is 40-90 b...

Embodiment 2

[0049] A method for manufacturing a pure titanium seamless pipe, comprising the following steps:

[0050] a. Preparation of tube billets and rods: smelting sponge titanium (grade 1 or grade 2 sponge titanium) in a vacuum consumable electric arc furnace into finished titanium ingots, and then forging (rolling) into tube blanks and rods, tube blank rods The diameter of the material is φ90mm;

[0051] b. Machining of tube billets and bars: Saw the tube billets and bars (using a grinder, etc.) to grow a billet with a length of 650-4500mm; then use a horizontal centering machine for centering, and the centering hole range is φ18±0.5~ φ30±0.5mm; then use a peeling locomotive to lighten the surface defects of the blank;

[0052] c. Cross-rolling piercing: heat the billet to 700-980°C, use a two-roll cross-rolling unit to perforate 1-2 times, use molybdenum plugs or water-cooled plugs, the inclination angle of the piercing rolls is 8°, and the number of roll rotations is 40-90 basis ...

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Abstract

The invention relates to a method for manufacturing pure titanium seamless tubes. The method is characterized by comprising the following steps of: preparing tube blank bars; machining the tube blank bars; diagonally rolling and punching holes: heating blank to 700 to 980 DEG C, punching holes once or twice by utilizing a two-roll diagonally rolling mill group, wherein molybdenum mandrels or water-cooled mandrels are utilized, the inclined angle of punching roll is 8 degrees, the number of revolutions of the roll is 40 to 90 basic speed to 195 r / min; preparing the pierced billet after punching hole, wherein the specifications of the pierced billet are that the outside diameter is phi 72 to phi 125mm,the wall thickness is 5 to 20mm, and the length is; carrying out cold rolling; and carrying out heat treatment on finished product, detecting performance and entering warehouse. The invention has the characteristics of high production efficiency, low production cost, high material yield, short production period, low device investment, better product quality, and the like. The produced pure titanium seamless tubes have good quality, the mechanical properties accord with state requirements, and the pure titanium seamless tubes can meet the need for large-scale industrial production.

Description

technical field [0001] The invention belongs to the manufacture of titanium metal pipes, and relates to a method for manufacturing pure titanium seamless pipes. It is mainly suitable for the production of pure titanium seamless pipes by skew rolling piercing + cold rolling. Background technique [0002] Titanium and titanium alloys are emerging structural and functional materials, which have many advantages such as high specific gravity to strength ratio, small thermal expansion coefficient, good corrosion resistance, high temperature performance, low temperature toughness and low temperature superconductivity. In recent years, it has been widely used in civil fields such as aerospace, military industry, chemical industry, petroleum, marine, sports, etc. It is called the "third metal" after iron and aluminum, also known as "space metal", " Ocean Metal". [0003] With the development of my country's economy, petroleum, chemical and other fields have also successively used p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21B19/06B21B37/46
Inventor 王怀柳周茂华李守军刘刚王远明邝素军石军李洪东
Owner PANGANG GROUP SICHUAN CHANGCHENG SPECIAL STEEL
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