A kind of high impact toughness titanium alloy and the method for using titanium alloy to prepare seamless pipe

A technology of seamless pipes and titanium alloys, applied in metal rolling, metal processing equipment, manufacturing tools, etc., can solve the problems of high room temperature deformation resistance, slow application of titanium alloy tubing, etc., without affecting impact toughness and elongation. , Solve the problem of galvanic corrosion and enhance the effect of wear resistance

Active Publication Date: 2022-03-11
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the application of titanium alloy tubing in China is slow, and due to the high deformation resistance of titanium alloy at room temperature, the processing of titanium alloy seamless pipes with a certain length and wall thickness and excellent mechanical properties is difficult.

Method used

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  • A kind of high impact toughness titanium alloy and the method for using titanium alloy to prepare seamless pipe
  • A kind of high impact toughness titanium alloy and the method for using titanium alloy to prepare seamless pipe
  • A kind of high impact toughness titanium alloy and the method for using titanium alloy to prepare seamless pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Step 1, ingot preparation: 铌 中 合, MO block, pure sponge Zr, nail nails, sponge Ti by mixing, pressed electrode, vacuum self-consuming twice smelting Alloy ingots, alloy phase vary from 973 ° C.

[0039] Step 2, the billet preparation: 1150 ° C Seduch forging, 3-4 fire, 960 ° C, two fire, rehabilitation, rendering, φ600 bar blank.

[0040]Step three, oblique rolling perforation: After heating the rod to 950 ° C, the holding time was 420 min, then the shocked rolling perforation was carried out, and the billet of φ630 was prepared.

[0041] Step 4, hot rolling and fixed diameter: heat rolling after the diaphragm inversion, hot rolling, spraying boron sand inside the tube as a lubricant, and the deformation amount is controlled at 50-70%. Then be reduced diameter, and the extraction ratio is 20-30% during the reduction ratio, the thickness thickening is about 10% of the wall thickness of the heat rolling, and the maximum length of φ508 × 21 is prepared. Can reach 10m.

[0042...

Embodiment 2

[0045] Step 1, ingot preparation: 铌 中 合, MO block, pure sponge Zr, nail nails, sponge Ti by mixing, pressed electrode, vacuum self-consuming twice smelting Alloy ingots, alloy phase vary from 988 ° C.

[0046] Step 2, the billet was prepared: 1150 ° C Seduch forging, 3-4 fires, 960 ° C, two fire, rehabilitation, rendering, φ350 bar blank.

[0047] Step three, oblique rolling perforation: After heating the rod to 1000 ° C, the holding time is 200 min, then the oblique rolling perforation, the billet of φ360 is prepared.

[0048] Step 4, hot rolling and fixed diameter: heat rolling after the diaphragm in the punch, spraying borax in the pipe inside the tube, and the amount of deformation is controlled at 50-70%. Then, the diameter is reduced, and the extraction ratio is 20-30%, the reduction ratio is 20-30%, and the wall thickness thickens is about 10% of the wall thickness of the hot rolling, and the tube of φ219 × 12.7 can be prepared. More than 20m or more.

[0049] Step 5, heat...

Embodiment 3

[0052] Step 1, ingot preparation: 铌 中 合, MO block, pure sponge Zr, nail nails, sponge Ti by mixing, pressed electrode, vacuum self-consuming twice smelting Alloy ingots, alloy phase vary from 983 ° C.

[0053] Step 2, the billet preparation: 1150 ° C Seduch forging, 3-4 fire elsewed, 950 ° C two fire replacement rear processed φ350 bar blank.

[0054] Step three, oblique rolling perforation: The rod was heated to 1250 ° C for insulation, and the holding time was 90 min, then the tube blanks of φ159 were prepared by the oblique rolling perforation.

[0055] Step 4, hot rolling and fixed diameter: heat rolling after the diaphragm inversion, hot rolling, spraying boron sand inside the tube as a lubricant, and the deformation amount is controlled at 50-70%. Then be reduced diameter, and the extraction ratio is 20-30% during the reduction ratio, the thickness thickening is about 10% of the wall thickness of the heat rolling, and the maximum length of the tube of φ42 × 4.85 is prepared...

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Abstract

The invention discloses a titanium alloy with high impact toughness, the chemical composition requirements of which are Al 4.0-9.0%, Mo 0.5-5.0%, Zr 1-5%, Nb 1-5%, Fe 0.2-2.0%, and the balance is Ti and impurities. The method of using this high impact toughness titanium alloy to prepare seamless pipes is as follows: weigh aluminum-niobium master alloy, molybdenum block, pure sponge zirconium, iron nails, and sponge titanium according to the chemical composition requirements and mix them, press them into electrode rods, and then put Put it into a vacuum consumable electric arc furnace for secondary melting to obtain titanium alloy ingots; open the titanium alloy ingots for forging at 1150 ° C, and re-forge at 970 ~ 1020 ° C to obtain billets; then heat the billets to 950 ~ 1200°C; cross-rolling and piercing the billet to obtain a tube billet; hot-rolling the billet by using the waste heat after cross-rolling and piercing, and then performing fixed diameter reduction to obtain a pipe; heat treatment, straightening, sawing, inspection, and storage of the pipe . The seamless pipe prepared by using the titanium alloy in the invention has high strength, high plasticity, high low-temperature impact toughness and good corrosion resistance, and meets the application requirements of harsh working conditions of oil and gas wells.

Description

Technical field [0001] The present invention relates to the field of aluminum alloy material and seamless pipe, which is specifically a method of high impact toughness titanium alloy and a method of preparing seamless pipe using titanium alloys. Background technique [0002] Titanium and titanium alloy density are small, higher than strong, corrosion resistance, good resistance, and excellent anti-fatigue and creep properties, have huge application potential in the petrochemical industry. The titanium alloy pipe is widely used in the petrochemical industry due to its good corrosion resistance, especially sea-to-resistant corrosion and biological corrosion. SY / T6896.3-2016 Item 3: Titanium Alloy Tubes: Titanium Alloy Tubes The manufacturing process requirements for titanium alloy tubes are as follows: The titanium alloy tubing should be made of seamless titanium alloy tube. Low-cost preparation technology for petrochemical titanium alloy seamless pipes has always been research h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/03C22F1/18C22F1/02B21J1/06B21J1/04B21B37/56B21D3/00B21D37/16
CPCC22C14/00C22C1/03C22F1/183C22F1/02B21J1/06B21J1/04B21B37/56B21D3/00B21D37/16B21B2265/10
Inventor 宋德军陶欢李冲杨胜利
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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