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Vacuum solid type cast penetrated method for preparing particle reinforced metal-base surface composite material

A surface composite material, vacuum solid technology, applied in the field of wear-resistant and anti-wear material preparation, can solve the problems of easy occurrence of pores or inclusions, poor surface quality of castings, inability to produce parts, etc. The effect of capability, high surface quality and dimensional accuracy

Inactive Publication Date: 2007-10-17
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the existence of ordinary infiltration process, centrifugal infiltration process, V method infiltration process and solid infiltration process, the surface quality of castings is poor, the dimensional accuracy is low, defects such as pores or inclusions are prone to occur, and parts with complex structures cannot be produced and other shortcomings, the present invention provides a vacuum full mold infiltration method for preparing particle reinforced metal matrix surface composites

Method used

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  • Vacuum solid type cast penetrated method for preparing particle reinforced metal-base surface composite material
  • Vacuum solid type cast penetrated method for preparing particle reinforced metal-base surface composite material
  • Vacuum solid type cast penetrated method for preparing particle reinforced metal-base surface composite material

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Embodiment 1

[0034] (1) Preparation of refractory coating: the composition ratio of the coating is: 98 grams of quartz sand, 3.8 grams of sodium bentonite, 2.3 grams of white latex, Na 2 CO 3 0.10 grams, 0.48 grams of carboxymethyl cellulose, 0.04 grams of sodium dodecylbenzene sulfonate, 0.02 grams of n-octanol, the air permeability of the mixed paint at 1000 ° C is 2.120 cm 4 / g.min, the intensity is 17.65g / mm.

[0035](2) Preparation of vaporized pattern (EPS): draw the required part pattern on the foam plastic sheet, including the runner, sprue and inner runner pattern. The wire is cut, and the electric heating wire is 800W electric furnace wire. The current during cutting is controlled at 72A, and the voltage is controlled at 11V to obtain a rectangular shape with a size of 80×40×30mm. It is 30×30×140mm, and the inner runner is 15×15×30mm.

[0036] (3) Preparation and fixation of the preset body: 80 grams of tungsten carbide particles with a particle size of 40 to 60 mesh and 20 g...

Embodiment 2

[0043] (1) Preparation of refractory coating: the composition ratio of the coating is: 104 grams of quartz sand, 4.2 grams of sodium bentonite, 2.8 grams of white latex, Na 2 CO 3 0.13 grams, 0.52 grams of carboxymethyl cellulose, 0.06 grams of sodium dodecylbenzene sulfonate, 0.03 grams of n-octanol, the air permeability of the mixed paint at 1000 ° C is 2.65 cm 4 / g.min, the strength is 19.16g / mm.

[0044] (2) Preparation of vaporization pattern (EPS):

[0045] Make a vaporized mold, the size of the mold is 80×40×30mm, and the added volume is 12cm 3 Place the foam beads in the mold, and then use the foaming method in the prior art to directly prepare a vaporized pattern of 80×40×30 mm.

[0046] (3) Preparation and fixation of the preset body: 60 grams of tungsten carbide particles with a particle size of 40 to 60 mesh and 40 grams of high-carbon ferrochrome particles with a particle size of 60 to 80 mesh are mixed with a binder. Aqueous vinyl alcohol solution (PVA), the...

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Abstract

The invention relates to a v-epc cast-penetrating process for manufacturing metallic matrix surface composites with particle reinforced. According to structure of parts, foam material is cut or directly produced to a vaporable mode by foaming technology; reinforced particle is prepared into a precast block corresponding to a hard wearing surface shape required by the composites; the precast block is fixed on a surface of the foam material mode required to be alloyed; then embedding the mode into dry sand and pouring molten metal in a state of negative pressure after consolidating, wherein the negative pressure generated by vacuumizing can pump out gas generated by evaporating the foam plastic and gelatinize during pouring, meanwhile cavity filling performance of the molten metal can be increased by vacuum sealing technology to facilitate the molten metal infiltrating in the particle, thereby, a thicker and more compact composite layer can be obtained, and the prepared metallic matrix surface composites with tungsten carbide particle reinforced has higher surface quality and volume fraction of a strengthening body, more even strengthening body distribution as well as excellent impact wear resistance. The method of the invention is applicable to composite cast with low requirement, as well as to composite cast in complex shape with high technology requirement.

Description

technical field [0001] The invention relates to a method for preparing a particle-reinforced metal matrix surface composite material in vacuum full-form infiltration, in particular to a method for preparing a tungsten carbide particle-reinforced metal-matrix surface composite material that is resistant to impact and wear by vacuum full-form infiltration (V-EPC) The method belongs to the technical field of preparation of wear-resistant and wear-resistant materials. Background technique [0002] The development of modern industry has higher and higher requirements on the wear resistance of materials. Mining machinery, engineering machinery, agricultural machinery and various crushing and grinding machinery are used in metallurgy, mining, building materials, electric power, chemical industry, coal and agriculture. , The wearing parts of these mechanical equipment are subject to the wear and tear of various materials and grinding bodies such as sand, ore, soil, etc., and consume...

Claims

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Application Information

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IPC IPC(8): B22D23/04
Inventor 蒋业华周荣李祖来卢德宏周荣锋黎振华张玉勤
Owner KUNMING UNIV OF SCI & TECH
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