Melting and casting method of titanium-containing metal

A titanium metal and titanium alloy technology, applied in the field of smelting and casting of titanium-containing metals, can solve the problems of composition deviation, high vacuum degree, high technical threshold, etc., achieve high composition accuracy and uniformity, high mechanical properties, and improve batching efficiency Effect

Active Publication Date: 2020-12-18
BAIMTEC MATERIAL CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The traditional VISM disseminated material smelting process either cannot obtain enough metal for casting through one smelting, which has no practical significance for industrial production, or uses multiple smelting to obtain alloy ingots with uniform composition, which cannot shorten the process and save energy consumption
[0006] High-energy beam melting technologies such as electron beam (EB) and plasma beam (PB) can shorten the manufacturing process, but the high vacuum degree of the electron beam furnace will cause the aluminum element in the titanium-aluminum alloy to volatilize and burn, resulting in a serious deviation of the composition, so it cannot Smelting Titanium Aluminum Alloy
Although the plasma beam furnace can realize the smelting of titanium-aluminum alloy, its high-efficiency working gas is generally helium, and the cost is relatively high
In addition, electron beam furnaces and plasma beam furnaces have high investment costs and high technical thresholds, which are not conducive to the reduction of alloy costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The smelting and casting method of embodiment 1 ZTA2 pure titanium

[0030] The smelting of pure titanium only needs to simply calculate the oxygen content to add titanium dioxide, there is no problem with the uniformity of the alloy composition, and there is no need to calculate according to the patent algorithm, so this embodiment focuses on the smelting part.

[0031] Ingredients calculation: electrode weight W = 22.000kg, sponge titanium oxygen content O Ti %=0.11%, ZTA2 Alloy O ZTA2 % = 0.20%; the amount of oxygen required: W O =W×(O ZTA2 %-O Ti %)=22.000kg×(0.20%-0.11%)=0.0198kg, oxygen package: W TiO2 =W O ÷40%=0.0495kg, amount of titanium sponge: W Ti =W-W TiO2 =22.000kg-0.0495kg=21.950kg.

[0032] Alloy package system: Weigh 49.5g of analytically pure titanium dioxide, wrap it in aluminum foil and weigh it as a cigar-shaped packet.

[0033] Electrode pressing: Weigh 21.950kg of titanium sponge, pour about half of it into the lower mold of the press fir...

Embodiment 2

[0037] The smelting and casting method of embodiment 2 ZTC4 titanium alloy

[0038] The nominal composition of the ZTC4 alloy is the same as that of the TC4 alloy, the nominal composition weight percentage Al% is 5.50% to 6.75%, V% is 3.50% to 4.50%, and O% is less than 0.20%. Among them, only Al is a high-vapor-pressure volatilization burning loss element.

[0039] Ingredients calculation:

[0040] The target ingredients are: E Al % = 6.50%, E V % = 4.25%, E O % = 0.18%, E Ti % = the rest; the master alloy used is aluminum vanadium alloy AlV55, where A Al % = 45.82%, A V %=54.16%; the aluminum element used is aluminum grain and aluminum strip; the oxygen additive used is titanium dioxide O TiO2 %=40%; Sponge titanium oxygen content O Ti %=0.12%; electrode weight is W b =22.000kg; first set the Al burning loss compensation as K%=0.50% according to the experience, and calculate the condensed shell compensation amount as W according to the electrode diameter 185mm, the ...

Embodiment 34822

[0073] Example 3 Melting of 4822 titanium-aluminum alloy

[0074] 4822 titanium aluminum alloy is an intermetallic compound composed of Ti-48Al-2Cr-2Nb in atomic ratio, the weight percentage is Al%=33.35%, Cr%=2.68%, Nb%=4.79%, Ti%=balance=59.18% . In this embodiment, only Al is the burning loss element, and its proportion is larger, and the burning loss is also more, and there are two main elements, Al and Ti.

[0075] Batching calculation: target composition is: Al%=33.35%, Cr%=2.68%, Nb%=4.79%, Ti%=surplus=59.18%, raw material is 00 grade sponge titanium, AlNb60 master alloy (A Al % = 39.25%, A Nb %=60.70%), chromium powder, aluminum grain, aluminum foil. It is estimated that the given Al burnout coefficient K=2.50%. According to the electrode diameter of 180mm, the average thickness of the solidification shell of 5mm and the density of the alloy 4822 to be smelted 3.97g / ml, the calculation of the solidification shell compensation is W STiAl =0.505kg, the total amount ...

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Abstract

The invention relates to a smelting and casting method for titanium-contained metal. The method comprises the following steps that ingredient calculation is calculated, and specifically, ingredient calculation is carried out according to the component content requirement of an alloy and the component content in all raw materials; an alloy bag is made, specifically, according to an ingredient calculation result, a required intermediate alloy and required elementary substances are weighed, and the alloy bag is made; electrode pressing is conducted, specifically, a main raw material is used for being wrapped around the alloy bag and is pressed into an electrode, and the end, close to the electrode, of the alloy bag can be exposed; induction smelting is carried out, specifically, the pressed electrode is baked in a furnace, and is inductively smelted into a titanium-containing metal liquid according to the matched vacuum and / or argon filling condition and an induction power loading curve;and casting is conducted, specifically, the superheat degree of the smelted titanium-contained metal liquid is improved, and the metal liquid is cast to form the titanium-contained metal. According tothe smelting and casting method for the titanium-contained metal, the smelting process flow of the titanium-contained metal can be shortened, an alloy ingot with high uniformity and high mechanical property can be obtained through single smelting, and the direct casting can be conducted through single smelting.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a method for smelting and casting titanium-containing metals. Background technique [0002] Titanium and titanium alloys have the advantages of corrosion resistance, high specific strength, good heat resistance, and non-magnetic properties, and are widely used in aerospace, chemical, marine engineering and other fields. Titanium-aluminum intermetallic compounds, also known as titanium-aluminum alloys or titanium-aluminum-based alloys, have the characteristics of high specific strength, specific modulus, high-temperature strength, stiffness, and good creep and oxidation resistance. The application targets are aeroengines, aerospace engines, and gas turbines. Temperature-resistant components used in power systems such as internal combustion engines and internal combustion engines below 750 °C. The smelting of both belongs to the titanium smelting industry, and their melts h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C14/00
CPCC22C1/03C22C14/00
Inventor 张强纪志军潘焕丹赵瑞斌南海
Owner BAIMTEC MATERIAL CO LTD
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