CN105234389A - Method for preparing titanium-zirconium-molybdenum (TZM) alloy by mixing superfine powder through ultrasonic waves - Google Patents
Method for preparing titanium-zirconium-molybdenum (TZM) alloy by mixing superfine powder through ultrasonic waves Download PDFInfo
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Abstract
The invention discloses a method for preparing titanium-zirconium-molybdenum (TZM) alloy by mixing superfine powder through ultrasonic waves. The method comprises the steps that raw materials including titanium hydride powder and zirconium hydride powder with the particle size being 100 nm-5 [mu]m and carbon black powder with the particle size being 10 nm-200 nm are mixed through an ultrasonic wave technique, and the TZM alloy is prepared through a powder metallurgy method. Compared with the prior art, according to the method, the titanium hydride powder and the zirconium hydride powder with the particle size being about 100 nm-5 [mu]m and the carbon black powder with the particle size being about 10 nm-200 nm are mixed through the ultrasonic wave technique, particles in the alloy are distributed uniformly, the problems that strengthening phases in the alloy structure are distributed unevenly and a strengthening phase structure is large in size are solved fundamentally, accordingly chemical contents are reduced, and especially the problem that oxygen content is obviously high is solved; the yield of materials is increased.
Description
Technical field
The present invention relates to and adopt powder metallurgical technique to prepare refractory metal alloy method, particularly a kind of ultrasonic wave mixing superfines prepares the method for TZM molybdenum alloy.
Background technology
TZM alloy (Mo0.5Ti0.08Zr0.02C) is a kind of molybdenum alloy that current consumption is many, purposes is wide.TZM molybdenum alloy have elevated temperature strength high, heat-resisting, resistance to wear, cryogenic mechanics performance and good welding performance, high temperature hardness and rigidity large, heat conduction, the advantage such as conduct electricity very well, can be used for the thermal structure part that operating temperature is about 1400 DEG C, extensive use is obtained, as the sheath material etc. in the distribution valve body in die casting die material, rocket nozzle larynx lining, special engine, jet pipe in combustion chamber, nozzle, gas conduct pipe, thermionic energy converters in the field such as chemical industry, petroleum industry, metallurgical industry and metal-processing industry, aerospace industry and nuclear energy technology.The molybdenum processing industry being abroad representative with Austrian PLANSEE company has had large-scale production technology, and yield rate reaches 70%, and it is not interrupted the research and development to this alloy always, continues to excavate its performance potential, improves its quality, expands its purposes.
Domesticly in molybdenum plug, conventional TZM bar and sheet material etc., carry out fruitful research work with Xibei Inst. of Non-Ferrous Metals, Beijing Iron and Steel Research Geueral Inst, metal Suo Deng unit of the Chinese Academy of Sciences for representative, but be no matter the control in TZM chemical composition, or the international esbablished corporations such as the control aspect of material property and uniformity thereof and PLANSEE, CLIMAX (U.S.) difference of comparing is comparatively large, and particularly oxygen content is obviously higher to be mainly manifested in chemical composition; Hardening constituent skewness in alloy structure; Hardening constituent is organized bigger than normal.Existing problems in the sheet material being less than 0.5mm at rolling thickness; The horizontal forgeability of bar bad defects such as () easily cracking, batch uniformity of becoming a useful person is poor, and quality is unstable.
Summary of the invention
The object of the invention is to provide a kind of ultrasonic wave mixing superfines to prepare the method for TZM molybdenum alloy, utilize ultrasonic technology Homogeneous phase mixing nano level metal powder, preparation high-performance TZM molybdenum alloy.
For achieving the above object, the present invention implements according to following technical scheme:
Ultrasonic wave mixing superfines prepares a method for TZM molybdenum alloy, comprises the following steps:
1) in Mo1 powder, add granularity be the titantium hydride of 100nm-5 μm and zircoium hydride powder and granularity is that the carbon black powders of 10nm-200nm obtains mixed-powder, in described mixed-powder, weight ratio shared by titantium hydride is 0.4 ~ 0.55%, shared by zircoium hydride powder, weight ratio is 0.06 ~ 0.12%, and weight ratio shared by carbon black is 0.01 ~ 0.04%;
2) adopt ultrasonic wave to be pre-mixed above-mentioned mixed-powder, incorporation time is 5 minutes; The V-type batch mixer adopting short time wet mixing and powerful mixing to combine again stirs, and ball material weight ratio is 1:1, and mixing time is 12 hours;
3) above-mentioned mixed-powder adopts isostatic pressing method compacting blank, and pressure is 1.8 ~ 3t/cm2,0.5 ~ 2 minute dwell time;
4) blank of above-mentioned compacting is sintered in a vacuum furnace, sintering temperature 1800 ~ 2000 DEG C, temperature retention time 2 ~ 8 hours;
5) adopt conventional method forging, rolling TZM molybdenum alloy bar material, sheet material, it is 1400 ~ 1600 DEG C that cogging temperature controls, and carries out the process that eliminates stress when processing capacity is 50 ~ 90%.
Compared with prior art, the present invention adopts particle to be 100nm to the titantium hydride of about 5 μm and zircoium hydride powder, particle is the carbon black powders of about 10nm to 200nm, employing ultrasonic technology mixes, make even particle distribution in alloy, fundamentally solve hardening constituent skewness in alloy structure; Hardening constituent organizes problem bigger than normal, and then reduces the chemical composition problem that particularly oxygen content is obviously higher, improves the yield rate of material.
Accompanying drawing explanation
Fig. 1 is the stereoscan photograph of the mixed-powder that V-type batch mixer of the present invention stirs.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, is used for explaining the present invention in this illustrative examples of inventing and explanation, but not as a limitation of the invention.
A kind of ultrasonic wave mixing superfines prepares the method for TZM molybdenum alloy, employing granularity is titantium hydride and the zircoium hydride powder of 100nm-5 μm, granularity is the carbon black powders of 10nm-200nm, adopts ultrasonic technology to mix above raw material, prepares TZM molybdenum alloy with powder metallurgy process.Specific embodiment is as follows:
Embodiment 1
Select molybdenum powder (Mo1) 20 kilograms, titantium hydride 100 grams, zircoium hydride 12 grams, carbon black 4 grams, ultrasonic technology is adopted to be pre-mixed above raw material 5 minutes, the V-type batch mixer adopting short time wet mixing and powerful mixing to combine stirs, ball material mass ratio 1:1, incorporation time 6 hours, the stereoscan photograph of mixed-powder is now as shown in Figure 1; Adopt isostatic pressed compacting blank, pressure 2t/cm2,1 minute dwell time, sintering is above in a vacuum furnace suppresses blank, sintering temperature 1900 DEG C, temperature retention time 2 hours; Adopt conventional method forging, rolling TZM molybdenum alloy bar material, sheet material, cogging temperature 1500 DEG C, carries out the process that eliminates stress when processing capacity is 80%.
Embodiment 2
Select molybdenum powder (Mo1) 100 kilograms, titantium hydride 500 grams, zircoium hydride 100 grams, carbon black 50 grams, ultrasonic technology is adopted to be pre-mixed above raw material 10 minutes, the V-type batch mixer adopting short time wet mixing and powerful mixing to combine stirs, ball material mass ratio 1:1, incorporation time 18 hours, the stereoscan photograph of mixed-powder is now as shown in Figure 1; Adopt isostatic pressed compacting blank, pressure 2.5t/cm2,2 minutes dwell times, sintering is above in a vacuum furnace suppresses blank, sintering temperature 2000 DEG C, temperature retention time 6 hours; Adopt conventional method forging, rolling TZM molybdenum alloy bar material, sheet material, cogging temperature 1600 DEG C, carries out the process that eliminates stress when processing capacity is 70%.
By the chemical composition of the TZM molybdenum alloy prepared of the present invention as table 1, mechanical behavior under high temperature is as shown in table 2.
Table 1TZM alloy composition compares, wt%
The mechanical behavior under high temperature of table 2TZM sheet alloy (thickness 0.10mm)
Summary, even particle distribution in the ZTM molybdenum alloy that the present invention prepares, fundamentally solves hardening constituent skewness in alloy structure; Hardening constituent organizes problem bigger than normal.And then reduce the chemical composition problem that particularly oxygen content is obviously higher, improve the yield rate of material.
Technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, the technology distortion that every technical scheme according to the present invention is made, and all falls within protection scope of the present invention.
Claims (1)
1. ultrasonic wave mixing superfines prepares a method for TZM molybdenum alloy, it is characterized in that, comprises the following steps:
1) in Mo1 powder, add granularity be the titantium hydride of 100nm-5 μm and zircoium hydride powder and granularity is that the carbon black powders of 10nm-200nm obtains mixed-powder, in described mixed-powder, weight ratio shared by titantium hydride is 0.4 ~ 0.55%, shared by zircoium hydride powder, weight ratio is 0.06 ~ 0.12%, and weight ratio shared by carbon black is 0.01 ~ 0.04%;
2) adopt ultrasonic wave to be pre-mixed above-mentioned mixed-powder, incorporation time is 5 minutes; The V-type batch mixer adopting short time wet mixing and powerful mixing to combine again stirs, and ball material weight ratio is 1:1, and mixing time is 12 hours;
3) above-mentioned mixed-powder adopts isostatic pressing method compacting blank, and pressure is 1.8 ~ 3t/cm
2, 0.5 ~ 2 minute dwell time;
4) blank of above-mentioned compacting is sintered in a vacuum furnace, sintering temperature 1800 ~ 2000 DEG C, temperature retention time 2 ~ 8 hours;
5) adopt conventional method forging, rolling TZM molybdenum alloy bar material, sheet material, it is 1400 ~ 1600 DEG C that cogging temperature controls, and carries out the process that eliminates stress when processing capacity is 50 ~ 90%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951639A (en) * | 2022-05-10 | 2022-08-30 | 厦门虹鹭钨钼工业有限公司 | High-density fine-grain structure molybdenum alloy plug and preparation method thereof |
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| US5435829A (en) * | 1992-10-29 | 1995-07-25 | H. C. Starck Gmbh & Co. Kg | Molybdenum powder mixture for TZM |
| CN1962911A (en) * | 2006-12-15 | 2007-05-16 | 西部金属材料股份有限公司 | Process for preparing molybdenum alloy TZM by powder metallurgy |
| CN101656160A (en) * | 2009-09-11 | 2010-02-24 | 昆明理工大学 | Preparing method of silver-base metal acid-salt electrical-contact composite material |
| CN102041404A (en) * | 2009-10-23 | 2011-05-04 | 西安格美金属材料有限公司 | Method for preparing low-oxygen titanium-zirconium-molybdenum (TZM) alloy and application |
| CN102839310A (en) * | 2012-08-16 | 2012-12-26 | 西安建筑科技大学 | Ultrasound humidification mixing method for preparing high-strength high-tenacity molybdenum alloy |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5435829A (en) * | 1992-10-29 | 1995-07-25 | H. C. Starck Gmbh & Co. Kg | Molybdenum powder mixture for TZM |
| CN1962911A (en) * | 2006-12-15 | 2007-05-16 | 西部金属材料股份有限公司 | Process for preparing molybdenum alloy TZM by powder metallurgy |
| CN101656160A (en) * | 2009-09-11 | 2010-02-24 | 昆明理工大学 | Preparing method of silver-base metal acid-salt electrical-contact composite material |
| CN102041404A (en) * | 2009-10-23 | 2011-05-04 | 西安格美金属材料有限公司 | Method for preparing low-oxygen titanium-zirconium-molybdenum (TZM) alloy and application |
| CN102839310A (en) * | 2012-08-16 | 2012-12-26 | 西安建筑科技大学 | Ultrasound humidification mixing method for preparing high-strength high-tenacity molybdenum alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951639A (en) * | 2022-05-10 | 2022-08-30 | 厦门虹鹭钨钼工业有限公司 | High-density fine-grain structure molybdenum alloy plug and preparation method thereof |
| CN114951639B (en) * | 2022-05-10 | 2023-11-14 | 厦门虹鹭钨钼工业有限公司 | High-density fine-grain structure molybdenum alloy plug and preparation method thereof |
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Application publication date: 20160113 |