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A kind of manufacturing method of titanium forged flange tee

A manufacturing method and block technology, which is applied in the field of titanium metal processing and the manufacture of titanium forged flange tees, can solve the problems of insufficient compression resistance of titanium welded tees, and achieve easy replacement and maintenance, uniform internal stress distribution, and easy use. Effect of life improvement

Active Publication Date: 2018-06-26
BAOJI YONGSHENGTAI TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a manufacturing method of titanium forged flange tee, which effectively solves the problem of insufficient compression resistance of titanium casting tee and titanium welding tee

Method used

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  • A kind of manufacturing method of titanium forged flange tee
  • A kind of manufacturing method of titanium forged flange tee

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] According to the capacity of the press tank, O grade sponge titanium is used as the raw material, and the oxygen bag is made of ≤0.07% iron and ≤0.2% oxygen;

[0074] The titanium sponge and the oxygen pack are placed in layers in the press tank, pressed under a 4500 press to form an electrode block, and then welded into an electrode by argon arc welding;

[0075] Place the obtained electrode in a vacuum electric arc furnace for secondary melting treatment to obtain titanium ingots. The first melting: use a crucible with a diameter of ф480~ф560mm, the arcing current is 2200A, the voltage is 27V, and the vacuum degree is 6.8E- 0. The melting current is 6000A, the voltage is 33V, the vacuum degree is 1.5E·1, the arc stability is 3, the cooling time is 2.5h, and the water temperature is below 60°C; the second melting: use a crucible with a diameter of ф560~ф640mm, The arc starting current is 2.2KA, the voltage is 27V, the vacuum degree is 6.8E-0, the melting current is 8KA...

Embodiment 2

[0082] According to the capacity of the press tank, O grade sponge titanium is used as the raw material, and the oxygen bag is made of ≤0.07% iron and ≤0.2% oxygen;

[0083] The titanium sponge and the oxygen pack are placed in layers in the press tank, pressed under a 4500 press to form an electrode block, and then welded into an electrode by argon arc welding;

[0084] Place the obtained electrode in a vacuum electric arc furnace for secondary melting treatment to obtain titanium ingots. The first melting: use a crucible with a diameter of ф480mm~ф560mm, the arcing current is 2800A, the voltage is 28V, and the vacuum degree is 4.3E- 0. The melting current is 7500A, the voltage is 34V, the vacuum degree is 1.5E·1, the arc stability is 6, the cooling time is 4h, and the water temperature is below 60°C; the second melting: use a crucible with a diameter of ф560mm~ф640mm, starting The arc current is 2.8KA, the voltage is 28V, the vacuum degree is 4.3E-0, the melting current is 1...

Embodiment 3

[0091] According to the capacity of the press tank, O grade sponge titanium is used as the raw material, and the oxygen bag is made of ≤0.07% iron and ≤0.2% oxygen;

[0092] The titanium sponge and the oxygen pack are placed in layers in the press tank, pressed under a 4500 press to form an electrode block, and then welded into an electrode by argon arc welding;

[0093] Place the obtained electrode in a vacuum electric arc furnace for secondary melting treatment to obtain titanium ingots. The first melting: use a crucible with a diameter of ф480mm~ф560mm, the arcing current is 3500A, the voltage is 30V, and the vacuum degree is 1.4E- 0. The melting current is 9000A, the voltage is 35V, the vacuum degree is 5.0E·0, the arc stability is 8, the cooling time is 5.5h, and the water temperature is below 60°C; the second melting: use a crucible with a diameter of ф560mm~ф640mm, The arc starting current is 3.5KA, the voltage is 30V, the vacuum degree is 1.4E-0, the melting current is...

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Abstract

The invention discloses a method for manufacturing a titanium-forge flange tee joint. The method comprises the following steps that (1) material preparation is conducted through matching of O-grade titanium sponge and an oxygen bag; (2) firstly, the titanium sponge and the oxygen bag are subjected to piezoelectric electrode treatment, so that an electrode block is obtained, and then an electrode is formed by welding; (3) the obtained electrode is placed in a vacuum electric-arc furnace for secondary smelting treatment, so that a titanium ingot is obtained; (4) heat preservation is conducted on the titanium ingot; (5) the titanium ingot is subjected to upsetting-drawing forging through an oil press, and a titanium square block is obtained after four-time upsetting, four-time drawing are conducted and two-time repeated heating treatment ; (6) the titanium square block is ground and checked, and thus a finished square block is obtained; (7) the finished square block checked to be qualified is machined, and thus a primarily-machined titanium-forge flange tee joint is obtained; and (8) the primarily-machined titanium-forge flange tee joint is subjected to external dimension checking, the diameter of a flange and the wire interval of a hole are checked in sequence, surface polishing treatment is conducted if the primarily-machined titanium-forged flange tee joint is flawless, and thus the titanium-forge flange tee joint is obtained. According to the method for manufacturing the titanium-forge flange tee joint provided by the invention, the problem that the compressive properties of a titanium-cast tee joint and a titanium-welded tee joint are insufficient is solved.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing methods, and relates to a titanium metal processing method, in particular to a manufacturing method of a titanium forged flange tee. Background technique [0002] Grade (TA 2 ) is industrial pure titanium, which is characterized by low strength but good plasticity, easy processing and forming, good stamping, welding, and cutting performance; in the atmosphere, sea water, wet chlorine gas, and oxidizing, neutral, and weakly reducing media It has good corrosion resistance and is mostly used in ships, petroleum and chemical fields. At normal temperature, a protective oxide film is easily formed on the surface of titanium metal, which is not corroded by water, acidic solution and alkaline solution, and has a particularly strong corrosion resistance to seawater. The installation of titanium pipes is mainly used in industrial sectors such as marine ships, petroleum, chemical and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J5/08C22B34/12
CPCB21J5/002B21J5/08C22B34/1227
Inventor 陈炳豊王荣生高鹏涛
Owner BAOJI YONGSHENGTAI TITANIUM IND
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