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A device for precise isostatic pressing of molybdenum thick-walled tube blank and homogeneous sintering method

A sintering method and isostatic pressing technology are applied in the field of molybdenum tube billet preparation devices, which can solve the problems of labor intensity and dust hazards of operators, long working hours of powder loading, etc., so as to avoid the leakage of pressure medium, uniform distribution, Effect of preventing abnormal grain growth

Active Publication Date: 2021-06-01
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At the same time, as the unit weight of molybdenum billets continues to increase, the uniformity of the billets with manual powder filling depends on the experience of the operator, and the working time for powder filling is longer, and the labor intensity and dust hazards of the operators are greater.

Method used

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  • A device for precise isostatic pressing of molybdenum thick-walled tube blank and homogeneous sintering method
  • A device for precise isostatic pressing of molybdenum thick-walled tube blank and homogeneous sintering method
  • A device for precise isostatic pressing of molybdenum thick-walled tube blank and homogeneous sintering method

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Experimental program
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Effect test

Embodiment 1

[0064] Next, a molybdenum thick-walled tube blank in the present invention is prepared by isostatic pressing and homogeneous sintering method Molybdenum tube blank.

[0065] Prepare molybdenum powder, Fsss particle size is 5.4μm, purity is 99.98%, bulk density is 1.04g / cm 3 ;

[0066] Through the isostatic pressing forming and sintering experiments of small-sized blanks, the isostatic pressing forming shrinkage of the wall thickness and height of this batch of molybdenum powder were 11% and 12%, respectively, and the sintering shrinkage of the wall thickness and height were both 13%. %, based on which the inner size of the rubber sleeve is calculated, and then the isostatic precise forming device is designed;

[0067] Assemble the isostatic precise forming device, set the quantitative distributor on the mandrel, and hoist it to the base bracket as a whole. The bottom of the steel sheath 1 is completely matched with the vibration platform 15. The steel mandrel 5 and the form...

Embodiment 2

[0074] Next, a molybdenum thick-walled tube blank in the present invention is prepared by isostatic pressing and homogeneous sintering method Molybdenum tube blank.

[0075] Prepare molybdenum powder, Fsss particle size: 2.45μm; bulk density: 1.47g / cm 3 ;

[0076] Through the isostatic pressing forming and sintering experiments of small-sized billets, the isostatic pressing forming shrinkage ratios of the wall thickness and height of this batch of molybdenum powder were respectively 11.5% and 11.5%, and the sintering shrinkage ratios of the wall thickness and height were respectively 12%, 11%, according to which the inner size of the rubber sleeve is calculated, and then the isostatic precise forming device is designed;

[0077]Assemble the isostatic precise forming device, set the quantitative distributor on the mandrel, and hoist it to the base bracket as a whole. The bottom of the steel sheath 1 is completely matched with the vibration platform 15. The steel mandrel 5 an...

Embodiment 3

[0084] Next, a molybdenum thick-walled tube blank in the present invention is prepared by isostatic pressing and homogeneous sintering method Molybdenum tube blank.

[0085] Prepare molybdenum powder, Fsss particle size: 3.8μm; bulk density: 1.08g / cm 3 ;

[0086] The molybdenum powder of this specification belongs to the conventional molybdenum powder, and the isostatic pressing shrinkage ratios of its wall thickness and height are 13% and 12.5% ​​respectively, and the sintering shrinkage ratios of wall thickness and height are both 12% and 11% respectively. The inner size of the rubber sleeve is designed to design an isostatic precise forming device.

[0087] Assemble the isostatic precise forming device, set the quantitative distributor on the mandrel, and hoist it to the base bracket as a whole. The bottom of the steel sheath 1 is completely matched with the vibration platform 15. The steel mandrel 5 and the forming device in the free state The rubber sleeve 4 is perpen...

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Abstract

The invention discloses a molybdenum thick-walled tube billet isostatic precise forming device, which comprises a rubber sleeve with a built-in steel mandrel, a tubular cavity is formed between the steel mandrel and the rubber sleeve, and one end of the tubular cavity is provided with a Rubber plug, the other end of the tubular cavity is connected to a steel base and a composite base composed of coated rubber. The coated rubber of the composite base fully covers the steel inner core as a whole. The tubular cavity is filled with molybdenum powder. The rubber plug and A shaped rubber plug is arranged between the molybdenum powder, and a steel sheath is connected outside the rubber sleeve, and the steel sheath is fixed on the base bracket. It can avoid the problem that the molybdenum powder at the junction of the all-steel base and the lower part of the molybdenum tube billet is pressed into a "wedge shape", thereby splitting the rubber sleeve and the leakage of the pressure medium. The invention also discloses a method for precise isostatic pressing and homogeneous sintering of molybdenum thick-walled tube blanks, which adopts the quantitative contour method of powder loading and the two-time sintering system of low heating rate and long and low temperature holding time, which can produce regular shape , Sintered thick-walled molybdenum tube billets with fine and uniform grains.

Description

technical field [0001] The invention belongs to the technical field of molybdenum tube blank preparation devices, and in particular relates to a molybdenum thick-walled tube blank isostatically pressed precise forming device, and also relates to a molybdenum thick-walled tube blank isostatically pressed precisely formed and homogeneous sintering method. Background technique [0002] In recent years, the rapid development of the electronics industry and the new energy field has made the trend of sputtering substrates to develop in the direction of large sizes more and more obvious, and the requirements for the size of molybdenum targets are also increasing. As the glass substrates of the 10th generation and 11th generation lines of Japan Sharp Company reach 2880×3130mm and 3000×3320mm respectively, the molybdenum planar target has higher and higher requirements for the width of the molybdenum plate rolling mill roll and its supporting equipment. The cost of equipment has incr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/03B22F3/04B22F3/093B22F3/00B22F3/10B22F5/12
Inventor 冯鹏发党晓明卜春阳张菊平张铁军段琳琳罗锋
Owner JINDUICHENG MOLYBDENUM CO LTD