CN100390309C - Method of titanium or titanium alloy melting liquid deoxidizing purification - Google Patents
Method of titanium or titanium alloy melting liquid deoxidizing purification Download PDFInfo
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- CN100390309C CN100390309C CNB2006100307443A CN200610030744A CN100390309C CN 100390309 C CN100390309 C CN 100390309C CN B2006100307443 A CNB2006100307443 A CN B2006100307443A CN 200610030744 A CN200610030744 A CN 200610030744A CN 100390309 C CN100390309 C CN 100390309C
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- titanium
- titanium alloy
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- rare earth
- scavenging agent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to a method to deoxidize and purify titanium or titanium alloy. It adopts rare earth as element purifying agent to take deoxidizing and purification process to titanium or titanium alloy. The agent includes La 35-55wt%, Ce 25-35wt%, Nd 5-25wt%, Pr 8-10wt%, and Y 4-5wt%. The added quantity agent is 0.01-0.1% of the weight of titanium metal liquation. The titanium or titanium alloy is melted in vacuum middle frequency induction furnace lime crucible. When the temperature reaches to 1650-1720 degree centigrade, the agent would be added and quieting for 15-25 minutes and casting to gain the titanium or titanium alloy with low oxygen content.
Description
Technical field
The present invention relates to the method for a kind of titanium or titanium alloy melting liquid deoxidizing purification, belong to metal purification treatment process technical field.
Background technology
Because the fusing point height of titanium, and its chemical property is very active, when melting, almost all can react with used crucible refractory material such as zirconium white, magnesium oxide, silicon oxide etc., therefore is not suitable for using induction furnace melting.At present industrial, vacuum consumable electrode electric arc skull melting and the cooling of Forced water cooling copper crucible are often adopted in the melting of titanium or titanium alloy, on copper mould wall, solidify earlier a formation thin layer " scull " during melting, play protection titanium liquation, do not polluted and heat insulation effect by crucible material; Because the water jacketed copper crucible speed of cooling is very fast and form " scull " makes titanium melt temperature field inhomogeneous, add that titanium liquid is very short in the liquid hold-time, make that the casting composition after the cast is inhomogeneous, thereby influenced the performance of foundry goods; The energy consumption of this method is very big in addition.Someone proposes to come the melting titanium or titanium alloy with lime crucible, but after adopting the lime crucible melting, the oxygen level in the titanium liquid can increase, and influences its performance, the Control for Oxygen Content problem in the time of therefore must solving the lime crucible use.
Summary of the invention
The method that the purpose of this invention is to provide a kind of titanium or the titanium alloy melting liquid deoxidizing purification during melting in lime crucible.
The method of a kind of titanium of the present invention or titanium alloy melting liquid deoxidizing purification is characterized in that the scavenging agent that adds the rare earth element formation in titanium or titanium alloy melting liquid carries out purifying treatment.Scavenging agent is made up of proper amount of rare-earth element La, Ce, Nd, Pr and Y, and the weight percent of each moiety is as follows: La 35～55%, and Ce 25～35%, and Nd 5～25%, and Pr 8～10%, and Y 4～5%; The add-on of described rare earth element scavenging agent is 0.01～0.1% of titanium or a titanium alloy melting liquid weight; Adopt lime crucible melting titanium or titanium alloy in the vacuum medium frequency induction furnace, when smelting temperature reaches 1650～1720 ℃, add above-mentioned rare earth element scavenging agent, cast obtains extremely low titanium of oxygen level or titanium alloy melting liquid after calm 20～25 minutes.
In addition, the method of a kind of titanium or titanium alloy melting liquid deoxidizing purification, it is characterized in that the scavenging agent that adds the rare earth element formation in titanium or titanium alloy melting liquid carries out purifying treatment, scavenging agent is made up of proper amount of rare-earth element La, Ce and Nd, the weight percent of each moiety is as follows: La 50～60%, Ce 20～30%, and Nd 18～22%; The add-on of described rare earth element scavenging agent is 0.01～0.1% of titanium or a titanium alloy melting liquid weight; Adopt vacuum Medium frequency induction lime crucible melting titanium or titanium alloy, when smelting temperature reaches 1650～1720 ℃, add above-mentioned rare earth element scavenging agent, cast obtains extremely low titanium of oxygen level or titanium alloy melting liquid after calm 20～25 minutes.
The present invention has adopted the rare earth scavenging agent, utilize the chemically reactive of rare earth element, make the oxygen combination in itself and titanium or the titanium alloy melting liquid, form rare earth oxide, not only reduced the content of solubilised state oxygen in titanium or the titanium alloy melting liquid, thereby reduce the harm that lime crucible melting oxygenation brings for titanium or titanium alloy, improve the plasticity of titanium or titanium alloy.Simultaneously because these tiny rare earth metal phase disperses are distributed in the metal crystal boundary structure, refinement crystal grain, improved hot strength; In addition, the adding of rare earth element has also improved the defencive function of oxide film, has improved the performances such as tensile strength, impelling strength and erosion resistance of titanium or titanium alloy.
Embodiment
After now embodiments of the invention being described in.
Embodiment 1
Frequently use lime crucible melting Ti-Ni marmem in the induction furnace in a vacuum, when alloy melting reached 1650 ℃, the proportioning of pressing liquation weight 0.04% added the rare earth alloy scavenging agent; The weight percent of each moiety of rare earth alloy is: La 35%, and Ce 25%, and Nd 25%, and Pr 10%, and Y 5%; Under above-mentioned temperature of fusion, kept 20 minutes, then cast.After tested, titanium alloy liquid oxygen content is reduced to 290ppm from original 1200ppm, and its plasticity improves 20%, and hardness reduces by 5%.
Embodiment 2
Frequently use lime crucible melting Ti6Al4V alloy in the induction furnace in a vacuum, when alloy melting reached 1700 ℃, the proportioning of pressing liquation weight 0.08% added the rare earth alloy scavenging agent; The weight percent of each moiety of rare earth alloy is: La 45%, and Ce 35%, and Nd 5%, and Pr 10%, and Y 5%; Under above-mentioned temperature of fusion, kept 20 minutes, then cast.After tested, titanium alloy liquid oxygen content is reduced to 2000ppm from 3400ppm, and plasticity has improved 15%.
Embodiment 3
Frequently use the pure titanium of lime crucible melting in the induction furnace in a vacuum, when pure titanium was melted to 1720 ℃, the proportioning of pressing liquation weight 0.08% added the rare earth alloy scavenging agent; The weight percent of each moiety of rare earth alloy is: La55%, and Ce 25%, and Nd 20%; Under above-mentioned temperature of fusion, kept 20 minutes, then cast.After tested, titanium liquid oxygen content is reduced to 4000ppm from 5400ppm, and plasticity increases.
Claims (2)
1. the method for titanium or titanium alloy melting liquid deoxidizing purification is characterized in that adding the scavenging agent that rare earth element constitutes and carries out purifying treatment in titanium or titanium alloy melting liquid; Scavenging agent is made up of proper amount of rare-earth element La, Ce, Nd, Pr and Y, and the weight percent of each moiety is as follows: La 35～55%, and Ce 25～35%, and Nd 5～25%, and Pr 8～10%, and Y 4～5%; The add-on of described rare earth element scavenging agent is 0.01～0.1% of titanium or a titanium alloy melting liquid weight; Adopt lime crucible melting titanium or titanium alloy in the vacuum medium frequency induction furnace, when smelting temperature reaches 1650～1720 ℃, add above-mentioned rare earth element scavenging agent, cast obtains low titanium of oxygen level or titanium alloy melting liquid after calm 20～25 minutes.
2. the method for titanium or titanium alloy melting liquid deoxidizing purification is characterized in that adding the scavenging agent that rare earth element constitutes and carries out purifying treatment in titanium or titanium alloy melting liquid; Scavenging agent is made up of proper amount of rare-earth element La, Ce and Nd, and the weight percent of each moiety is as follows: La 50～60%, and Ce 20～30%, and Nd 18～22%; The add-on of described rare earth element scavenging agent is 0.01～0.1% of titanium or a titanium alloy melting liquid weight; Adopt lime crucible melting titanium or titanium alloy in the vacuum medium frequency induction furnace, when smelting temperature reaches 1650～1720 ℃, add above-mentioned rare earth element scavenging agent, pour into a mould after calm 20～25 minutes, obtain the titanium or the titanium alloy melting liquid of low oxygen content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100307443A CN100390309C (en) | 2006-09-01 | 2006-09-01 | Method of titanium or titanium alloy melting liquid deoxidizing purification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100307443A CN100390309C (en) | 2006-09-01 | 2006-09-01 | Method of titanium or titanium alloy melting liquid deoxidizing purification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1912155A CN1912155A (en) | 2007-02-14 |
| CN100390309C true CN100390309C (en) | 2008-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100307443A Expired - Fee Related CN100390309C (en) | 2006-09-01 | 2006-09-01 | Method of titanium or titanium alloy melting liquid deoxidizing purification |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103014374B (en) * | 2012-11-16 | 2014-05-14 | 云南钛业股份有限公司 | Process for establishing kish on smelting cold bed of EB (Electronic Beam) furnace |
| CN103084555B (en) * | 2012-12-21 | 2014-08-20 | 江苏中容铜业有限公司 | Processing method for high purity oxygen-free copper rod of intelligent high voltage switch cabinet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04120225A (en) * | 1990-09-07 | 1992-04-21 | Kobe Steel Ltd | Manufacture of ti-al series alloy |
| JPH0617159A (en) * | 1992-07-01 | 1994-01-25 | Mitsubishi Materials Corp | Production of low oxygen high purity ti material |
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2006
- 2006-09-01 CN CNB2006100307443A patent/CN100390309C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04120225A (en) * | 1990-09-07 | 1992-04-21 | Kobe Steel Ltd | Manufacture of ti-al series alloy |
| JPH0617159A (en) * | 1992-07-01 | 1994-01-25 | Mitsubishi Materials Corp | Production of low oxygen high purity ti material |
Non-Patent Citations (1)
| Title |
|---|
| 添加钇对TiAl合金组织和性能的影响. 杨志尚等.北京科技大学学报，第17卷第5期. 1995 * |
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| CN1912155A (en) | 2007-02-14 |
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Granted publication date: 20080528 Termination date: 20100901 |