CN101966585A - Molybdenum blank preparing method - Google Patents
Molybdenum blank preparing method Download PDFInfo
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- CN101966585A CN101966585A CN 201010532720 CN201010532720A CN101966585A CN 101966585 A CN101966585 A CN 101966585A CN 201010532720 CN201010532720 CN 201010532720 CN 201010532720 A CN201010532720 A CN 201010532720A CN 101966585 A CN101966585 A CN 101966585A
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- molybdenum
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Abstract
The invention discloses a molybdenum blank preparing method, and relates to a method for preparing a pure molybdenum blank with the grain number of 5,000 to 20,000/mm<2> and the grain size of 300 to 800nm. The molybdenum blank preparing method is characterized in that: in the preparation process, submicron-scale molybdenum powder with the granularity of 0.5 to 1um is taken as a raw material and is pretreated, molded and sintered into a molybdenum blank. In the molybdenum blank preparing method, the molybdenum powder is taken as a raw material, and the molybdenum blank with fine grains can be prepared by reducing sintering temperature and shortening the sintering time, and has the density of 9.8 to 10.0, the grain number of 5,000 to 20,000/mm<2> and the grain size of 300 to 800nm. The submicron-scale molybdenum powder is taken as the raw material for preparing the molybdenum blank with fine grains, special requirements on production equipment are absent, and the method is suitable for industrial production.
Description
Technical field
A kind of molybdenum base preparation method relates to 5000～20000/mm of a kind of number of die
2, crystallite dimension is in the preparation method of 300～800nm pure molybdenum blank.
Background technology
The preparation method of molybdenum base normally adopts powder metallurgy method, and it is raw material that preparation process adopts molybdenum powder, makes the molybdenum base through preliminary treatment, moulding, sintering.The granularity of molybdenum powder and distribution influence very big to the density of sintered article and the size of crystal grain.At present, the molybdenum powder granularity of industrial employing generally between 2～5um, is difficult to satisfy the production number of die and can reaches 5000～20000/mm
2, crystallite dimension is at the needs of 300～800nm molybdenum base.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provides a kind of preparation number of die at 5000～20000/mm
2, crystallite dimension is in the preparation method of 300～800nm pure molybdenum blank.
The objective of the invention is to be achieved through the following technical solutions.
A kind of molybdenum base preparation method is characterized in that the submicron molybdenum powder that its preparation process employing granularity is 0.5～1um is a raw material, makes the molybdenum base through preliminary treatment, moulding, sintering.
A kind of molybdenum base preparation method of the present invention is characterized in that the submicron molybdenum powder of 0.5～1um carried out 3～5 hours batch mixing preliminary treatment, to improve the apparent density of molybdenum powder.
A kind of molybdenum base preparation method of the present invention is characterized in that its pressing pressure is 150～200MPa, and sintering temperature is 500 ℃, insulation 60～120min, 800 ℃, insulation 60～120min, 1250 ℃, insulation 60～120min, 1500～1700 ℃ of insulation 240～420min.
A kind of molybdenum base preparation method of the present invention adopts submicron molybdenum powder and cryogenic activating sintering fine grain molybdenum plate base.With 0.5～1um molybdenum powder is raw material, can prepare compact grained molybdenum base by preliminary treatment in early stage, reduction sintering temperature and sintering time, and the density of molybdenum base is between 9.8～10.0, and number of die is at 5000～20000/mm
2, crystallite dimension is at 300～800nm.Prepare compact grained molybdenum plate base with this molybdenum powder, can reduce sintering temperature and sintering time, production equipment is not had specific (special) requirements, be fit to suitability for industrialized production.
The specific embodiment
A kind of molybdenum base preparation method, the submicron molybdenum powder that its preparation process employing granularity is 0.5～1um is a raw material, makes by preliminary treatment, compacting, sintering; Pressing pressure of its compacting burning process is 150～200MPa, and sintering temperature is 500 ℃, insulation 60～120min, 800 ℃, insulation 60～120min, 1250 ℃, insulation 60～120min; 1500～1700 ℃ of insulation 240～420min.
During operation, be raw material, at first will suppress again behind the abundant batch mixing of molybdenum powder that sintering is prepared fine grain molybdenum plate base with the molybdenum powder of 0.5～1um submicron order.Preparation technology comprises the following steps: that (1) requires on forcing press molybdenum powder to be pressed into the molybdenum base of certain specification size with granularity at the submicron molybdenum powder of the 0.5～1um batch mixer batch mixing 3～5 hours (2) of packing into according to blank, pressing pressure is 150～200MPa (3) blank sintering, sintering temperature is 500 ℃, the insulation 60～120min, 800 ℃, the insulation 60～120min, 1250 ℃, the insulation 60～120min; 1500～1700 ℃ of insulation 240～420min.The density of the molybdenum base of making is between 9.8～10.0, and number of die is at 5000～20000/mm
2, crystallite dimension is at 300～800nm.
Embodiment 1
With 0.5～1um submicron molybdenum powder abundant batch mixing 5 hours in batch mixer, get 1000 gram molybdenum powder compression mouldings on hydraulic press, pressing pressure is 100MPa.Blank is fired in intermediate frequency furnace, and sintering temperature is 500 ℃, insulation 120min, 800 ℃, insulation 120min, 1250 ℃, insulation 120min, 1500 ℃ of insulation 120min, 1700 insulation 300min.The density of the molybdenum base that obtains is 9.95g/cm
3, number of die is at 10000/mm
2, crystallite dimension is at 700nm
Embodiment 2
With 0.5～1um submicron molybdenum powder abundant batch mixing 5 hours in batch mixer, get 1000 gram molybdenum powder compression mouldings on hydraulic press, pressing pressure is 100MPa.Blank is fired in intermediate frequency furnace, and sintering temperature is 500 ℃, insulation 120min, 800 ℃, insulation 120min, 1250 ℃, insulation 120min, 1500 ℃ of insulation 120min, 1600 insulation 120min.The density of the molybdenum base that obtains is 9.90g/cm
3, number of die is at 16000/mm
2, crystallite dimension is at 500nm.
Embodiment 3
With 0.5～1um submicron molybdenum powder abundant batch mixing 5 hours in batch mixer, to get 1000 gram molybdenum powders and be pressed into molybdenum bar waiting on the static pressure, pressing pressure is 120MPa.Blank is fired in intermediate frequency furnace, and sintering temperature is 500 ℃, insulation 120min, 800 ℃, insulation 120min, 1250 ℃, insulation 120min, 1500 ℃ of insulation 120min, 1700 insulation 240min.The density of the molybdenum base that obtains is 9.96g/cm
3, number of die is at 12000/mm
2, crystallite dimension is at 680nm.
Claims (3)
1. a molybdenum base preparation method is characterized in that the submicron molybdenum powder that its preparation process employing granularity is 0.5～1um is a raw material, adopts preliminary treatment, compacting sintering to make.
2. according to a kind of molybdenum base preparation method of claim 1, it is characterized in that its submicron molybdenum powder with 0.5～1um carries out 3～5 hours batch mixing preliminary treatment, to improve the apparent density of molybdenum powder.
3. according to a kind of molybdenum base preparation method of claim 1, it is characterized in that its pressing pressure is 150～200MPa, sintering temperature is 500 ℃, insulation 60～120min; 800 ℃, insulation 60～120min; 1250 ℃, insulation 60～120min; 1500～1700 ℃, insulation 240～420min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010532720 CN101966585A (en) | 2010-11-01 | 2010-11-01 | Molybdenum blank preparing method |
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| CN 201010532720 CN101966585A (en) | 2010-11-01 | 2010-11-01 | Molybdenum blank preparing method |
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| CN101966585A true CN101966585A (en) | 2011-02-09 |
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| CN 201010532720 Pending CN101966585A (en) | 2010-11-01 | 2010-11-01 | Molybdenum blank preparing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157795A (en) * | 2013-03-26 | 2013-06-19 | 金堆城钼业股份有限公司 | Preparation method of large-scale molybdenum plate blank |
| CN103658652A (en) * | 2012-09-24 | 2014-03-26 | 上海六晶金属科技有限公司 | Method for sintering pure molybdenum metal sheet green pressing |
| CN104070166A (en) * | 2014-07-10 | 2014-10-01 | 青岛裕华电子科技有限公司 | Production method for sintering molybdenum blank in low temperature activated mode |
| CN108543947A (en) * | 2018-05-11 | 2018-09-18 | 成都联虹钼业有限公司 | A kind of preparation method of molybdenum base |
| CN108746630A (en) * | 2018-06-25 | 2018-11-06 | 长春中科昊融新材料研究有限公司 | Reduce the method that sintering temperature prepares metal injection moulding feeding |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038230A (en) * | 1988-06-09 | 1989-12-27 | 天津大学冶金分校 | Low-temperature sintering high pure and ultra-fine crystal grain molybdenum base technology |
-
2010
- 2010-11-01 CN CN 201010532720 patent/CN101966585A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038230A (en) * | 1988-06-09 | 1989-12-27 | 天津大学冶金分校 | Low-temperature sintering high pure and ultra-fine crystal grain molybdenum base technology |
Non-Patent Citations (1)
| Title |
|---|
| > 20100930 黄永章等 一种高抗拉强度纯钼棒的制备和组织研究 第684-688页 3 第34卷, 第5期 2 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658652A (en) * | 2012-09-24 | 2014-03-26 | 上海六晶金属科技有限公司 | Method for sintering pure molybdenum metal sheet green pressing |
| CN103157795A (en) * | 2013-03-26 | 2013-06-19 | 金堆城钼业股份有限公司 | Preparation method of large-scale molybdenum plate blank |
| CN103157795B (en) * | 2013-03-26 | 2014-12-24 | 金堆城钼业股份有限公司 | Preparation method of large-scale molybdenum plate blank |
| CN104070166A (en) * | 2014-07-10 | 2014-10-01 | 青岛裕华电子科技有限公司 | Production method for sintering molybdenum blank in low temperature activated mode |
| CN108543947A (en) * | 2018-05-11 | 2018-09-18 | 成都联虹钼业有限公司 | A kind of preparation method of molybdenum base |
| CN108746630A (en) * | 2018-06-25 | 2018-11-06 | 长春中科昊融新材料研究有限公司 | Reduce the method that sintering temperature prepares metal injection moulding feeding |
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Application publication date: 20110209 |