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Al2O3-TiC/Al2O3-TiC-CaF2 self-lubricating laminated ceramic drawing die and preparation method thereof

An al2o3-tic-caf2, al2o3-tic technology, applied in the field of preparation of the laminated ceramic mold, can solve the problems of high friction coefficient and poor toughness, and achieve high hardness and strength, improved toughness, and compact structure.

Inactive Publication Date: 2013-10-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor toughness of ceramic materials and the high friction coefficient (0.8~1.0) under dry friction conditions limit its wide application.

Method used

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  • Al2O3-TiC/Al2O3-TiC-CaF2 self-lubricating laminated ceramic drawing die and preparation method thereof
  • Al2O3-TiC/Al2O3-TiC-CaF2 self-lubricating laminated ceramic drawing die and preparation method thereof
  • Al2O3-TiC/Al2O3-TiC-CaF2 self-lubricating laminated ceramic drawing die and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Al of the present invention 2 O 3 -TiC / Al 2 O 3 -TiC-CaF 2 The self-lubricating laminated ceramic drawing die has an aperture size of F4mm, which is prepared by a composite lamination-vacuum hot pressing sintering method in the early stage, and a two-step process of die hole grinding and processing in the later stage.

[0032] The early stage composite laminate-vacuum hot pressing sintering process is:

[0033] According to the principle of physical and chemical compatibility, the Al 2 O 3 -TiC layer ceramic powder and bonding metal powder in accordance with Al 2 O 3 :TiC:Mo:Ni=45:50:0.5:4.5 (Vol.%) to obtain Al after mixed ball milling 2 O 3 -TiC ceramic powder. Al 2 O 3 -TiC-CaF 2 Ceramic powder is also made of Al 2 O 3 Powder, TiC powder and CaF 2 Powder according to Al 2 O 3 :TiC: CaF 2 =30:60:10 (Vol.%) is obtained after mixing and ball milling. Taking full account of the contact between the metal wire and the mold in the actual drawing process, the Al 2 O 3 -TiC layer ...

Embodiment 2

[0039] It is basically the same as embodiment 1, and the difference lies in:

[0040] The die hole size of the mold is different, the die hole size is F1mm;

[0041] The post-processing process is different, the post-processing is through the EDM perforation-inner hole grinding process;

[0042] Ben Al 2 O 3 -TiC / Al 2 O 3 -TiC-CaF 2 The density of the self-lubricating laminated ceramic drawing die is 4.42g / cm 3 , The theoretical density is 4.53g / cm 3 , The hardness is 20.1GPa, and the mold has self-lubricating characteristics during the drawing process.

Embodiment 3

[0044] It is basically the same as embodiment 1, and the difference lies in:

[0045] Different laminated structure design, Al 2 O 3 -TiC layer ceramic powder and Al 2 O 3 -TiC-CaF 2 The layered ceramic powder is designed in a laminated structure with a volume ratio of 12:2:1:2:1:2:20 from bottom to top in the graphite mold, and the unit volume thickness is 0.5mm.

[0046] Ben Al 2 O 3 -TiC / Al 2 O 3 -TiC-CaF 2 The density of the self-lubricating laminated ceramic drawing die is 4.40g / cm 3 , The theoretical density is 4.56g / cm 3 , The hardness is 20.4GPa, and the mold has self-lubricating characteristics during the drawing process.

[0047] In summary, the Al prepared by the manufacturing method of the present invention 2 O 3 -TiC / Al 2 O 3 -TiC-CaF 2 The self-lubricating laminated ceramic drawing die not only has the characteristics of high hardness, high strength and good toughness, but also has self-lubricating properties.

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Abstract

The invention relates to a drawing die and particularly relates to an Al2O3-TiC / Al2O3-TiC-CaF2 self-lubricating laminated ceramic drawing die and also relates to a preparation method of the laminated ceramic drawing die. The technical scheme is as follows: the Al2O3-TiC / Al2O3-TiC-CaF2 self-lubricating laminated ceramic drawing die mainly comprises an Al2O3-TiC layer ceramic material and an Al2O3-TiC-CaF2 layer ceramic material, wherein the Al2O3-TiC layer ceramic material comprises the following components according to the volume ratio: 45% of aluminum oxide, 50% of titanium carbide, 0.5% of molybdenum, 4.5% of nickel and trace magnesium oxide and yttrium oxide; the Al2O3-TiC-CaF2 layer ceramic material comprises the following components according to the volume ratio: 30% of aluminum oxide, 60% of titanium carbide and 10% of calcium fluoride. The Al2O3-TiC layer ceramic material and the Al2O3-TiC-CaF2 layer ceramic material are laminated according to the design requirements of different wire processing sizes for the ceramic drawing die, and the ceramic die obtained after sintering retains higher hardness and strength, meanwhile, the toughness of the die is improved, and in addition, the whole die has a self-lubricating characteristic in the drawing process, so that the wear reducing and resisting effects are remarkable.

Description

technical field [0001] The present invention relates to a kind of drawing die, especially a kind of Al 2 o 3 -TiC / Al 2 o 3 -TiC-CaF 2 A self-lubricating laminated ceramic drawing die, and the invention also relates to a preparation method of the laminated ceramic die. Background technique [0002] Drawing is a plastic processing method to obtain a product with the same cross-sectional size and shape as the die hole by applying a pulling force to the metal blank to pass through the die hole of the die. Drawing is the main production method of metal wire and wire. This processing and production method can maximize the utilization rate of materials, and at the same time can obtain better metal mechanical properties and higher dimensional accuracy and surface quality. During the drawing process, the working area and the sizing area of ​​the drawing die are in continuous contact with the processed wire, resulting in severe sliding friction, and the contact area is in a stat...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/622
Inventor 杨学锋宋培龙王子然王守仁王砚军杨丽颖孙宾乔阳
Owner UNIV OF JINAN
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