Production method of titanium alloy large-diameter square thin-wall pipe

A technology of thin-walled pipes and production methods, applied in metal processing equipment, forming tools, coatings, etc., can solve the problems of high requirements for hot rolling process equipment and inapplicability of cold rolling and cold drawing processes, and meet equipment requirements and operation requirements Simple, reduce energy consumption, improve the effect of finished product rate

Active Publication Date: 2021-08-13
索罗曼(常州)合金新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide the production method of titanium alloy large-diameter square thin-walled pipe
[0005] The technical problem to be solved in the present invention: In view of the shortcomings of the two main processes of the existing square tube forming, that is, the hot rolling process requires high equipment, and the cold rolling and cold drawing process is not suitable for large-diameter tubes, it is necessary to develop a titanium alloy large-diameter square tube. Thin-walled pipe production method

Method used

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  • Production method of titanium alloy large-diameter square thin-wall pipe
  • Production method of titanium alloy large-diameter square thin-wall pipe
  • Production method of titanium alloy large-diameter square thin-wall pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The anti-oxidation coating is prepared by the following steps:

[0032] Step S1, weighing the following raw materials in parts by weight: SiO 2 10 parts, MgO 5 parts, SiC 5 parts, ZrO 2 2 parts, 1 part of CaO, 5 parts of ceramic micropowder;

[0033] Step S2, the SiO 2 , MgO, SiC, ZrO 2 , CaO and ceramic micropowder are mixed evenly and ground finely, and filtered through a 200-mesh filter screen to obtain the base material;

[0034] Step S3, mix 31.2g of graphite powder, 23.4g of potassium persulfate, 23.1g of phosphorus pentoxide and 110.5mL of concentrated sulfuric acid with a mass fraction of 98%, and react in a water bath at 80°C for 4.5h. After cooling to room temperature, use Diluted with deionized water, washed 3 times with deionized water, and dried in an oven at 70°C for 3 hours to obtain pre-oxidized graphite powder;

[0035] Step S4, add 35.6g of pre-oxidized graphite powder into 1.2L of concentrated sulfuric acid with a mass fraction of 98%, add 150....

Embodiment 2

[0039] The anti-oxidation coating is prepared by the following steps:

[0040] Step S1, weighing the following raw materials in parts by weight: SiO 2 12 parts, MgO 5 parts, SiC 6 parts, ZrO 2 2 parts, 2 parts of CaO, 5 parts of ceramic micropowder;

[0041] Step S2, the SiO 2 , MgO, SiC, ZrO 2 , CaO and ceramic micropowder are mixed evenly and ground finely, filtered through a 250-mesh filter to obtain the base material;

[0042] In step S3, mix 32.5g of graphite powder, 24.2g of potassium persulfate, 23.5g of phosphorus pentoxide and 111.6mL of concentrated sulfuric acid with a mass fraction of 98%, and react in a water bath at 80°C for 4.5h. After cooling to room temperature, use Diluted with deionized water, washed 3 times with deionized water, dried in an oven at 75°C for 3 hours to obtain pre-oxidized graphite powder;

[0043] Step S4, add 35.8g of pre-oxidized graphite powder into 1.25L of concentrated sulfuric acid with a mass fraction of 98%, add 150.8g of 0.5m...

Embodiment 3

[0047] The anti-oxidation coating is prepared by the following steps:

[0048] Step S1, weighing the following raw materials in parts by weight: SiO 2 15 parts, MgO 6 parts, SiC 8 parts, ZrO 2 3 parts, 3 parts of CaO, 6 parts of ceramic micropowder;

[0049] Step S2, the SiO 2 , MgO, SiC, ZrO 2 , CaO and ceramic micropowder are mixed evenly and ground finely, and filtered through a 300-mesh filter screen to obtain the base material;

[0050] Step S3, mix 33.1g of graphite powder, 25.6g of potassium persulfate, 24.5g of phosphorus pentoxide and 112.4mL of concentrated sulfuric acid with a mass fraction of 98%, and react in a water bath at 80°C for 4.5h. After cooling to room temperature, use Diluted with deionized water, washed 3 times with deionized water, and dried in an oven at 80°C for 4 hours to obtain pre-oxidized graphite powder;

[0051] Step S4, add 36.8g of pre-oxidized graphite powder to 1.3L of concentrated sulfuric acid with a mass fraction of 98%, add 151.1...

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Abstract

The invention discloses a production method of a titanium alloy large-diameter square thin-wall pipe, and belongs to the technical field of material processing. The production method comprises a first step of preheating and fixing a die and smearing a lubricant on the surface of the die, and a second step of brushing an anti-oxidation coating on the surface of a titanium alloy circular pipe blank, heating to 800 DEG C, putting the heated titanium alloy circular pipe blank into the die, pressing a press into a male die pressing rod downwards, pushing a left male die and a right male die to move towards the two sides respectively, and expanding a circular pipe into a square pipe, thereby obtaining the titanium alloy large-diameter square thin-wall pipe. According to the method, a die bulging process is adopted for forming the titanium alloy circular pipe into the square pipe, the productivity is considerable, the equipment requirement and the operation requirement are much simpler, through die testing, the pipe diameter of the square pipe produced through the process can reach 300 mm, the product tolerance is within + / -0.5 mm, sizing cutting is not needed during one-pipe forming, and the effects of increasing the yield and reducing energy consumption are also achieved.

Description

technical field [0001] The invention belongs to the technical field of material processing and relates to a production method of a titanium alloy large-diameter square thin-walled pipe. Background technique [0002] Titanium alloy has the advantages of low density, high specific strength, corrosion resistance, and non-magnetic properties. It has broad application prospects in the fields of aviation, aerospace, chemical industry, weapons, ships, automobiles, construction, and medical treatment. It is known as the metal of the 21st century. Material, has the reputation of "space metal", "ocean metal" and "third metal". Therefore, TA16, TA18, TA10, TC4 and other titanium alloys are processed into pipes of various specifications, which are used in aviation, chemical industry, ships and other fields. [0003] At present, the production of titanium alloy square tubes (non-welded tubes) is less, and there is no relatively mature process. In the production process of steel square t...

Claims

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Application Information

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IPC IPC(8): B21D39/20B21D37/18B21D37/10B21D37/16C09D1/00C09D7/61C09D7/62
CPCB21D39/20B21D37/18B21D37/10B21D37/16C09D1/00C09D7/61C09D7/62
Inventor 陈修琳张雷钱超鹏
Owner 索罗曼(常州)合金新材料有限公司
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