TiCp/EPS lost foam manufacturing technology and steel matrix composite casting technology by means of TiCp/EPS lost foam

A preparation process and technology of lost foam, which is applied in the field of lost foam casting of composite materials in the field of metal forming. It can solve the problems that the thickness of the wear-resistant layer cannot be made too thick, the thickness of the coating is difficult to control accurately, and the size of the parts cannot be controlled. Operational complexity, improving the comprehensive mechanical properties of the product, and benefiting the effect of saving energy and reducing consumption

Active Publication Date: 2019-03-15
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the paint is applied on the pattern, the size of the parts cannot be controlled due to the difficulty in accurately controlling the thickness of the paint, which brings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A TiCp / EPS lost foam preparation process, comprising the following process steps:

[0071] Step 1: Mixing preparation: TiC surface is coated with Ni powder, weigh 10 parts of TiC particles, 2 parts of rare earth powder, 87 parts of EPS beads, 1 part of binder, and weigh the TiC particles, rare earth Mix the powder, EPS beads and binder evenly. Wherein, the particle size of the TiC particles is 600 mesh, and the rare earth powder is rare earth magnesium powder.

[0072] Step 2: Preheat the mold so that the mold temperature reaches 100°C.

[0073] Step 3: Use compressed air to fill the mixed material into the mold, and pass steam into the mold with a steam temperature of 120°C; control the pressure inside the mold at 0.18MPa, and carry out the pressure-holding operation, and set the pressure-holding time to 1min.

[0074] Step 4: After the pressure holding operation is completed, release hot steam and spray water on the back of the mold to cool the mold to 47°C. After t...

Embodiment 2

[0082]A TiCp / EPS lost foam preparation process, comprising the following process steps:

[0083] Step 1: Preparation of mixture: Coat the surface of TiC with Ni powder, weigh 5 parts of TiC particles, 2 parts of rare earth powder, 90 parts of EPS beads, and 3 parts of binder by volume, and weigh the TiC particles, rare earth Powder, EPS beads, and binder are mixed evenly. Wherein, the particle size of the TiC particles is 800 mesh, and the rare earth powder is rare earth magnesium powder.

[0084] Step 2: Preheat the mold so that the mold temperature reaches 100°C.

[0085] Step 3: Use compressed air to fill the mixed material into the mold, and pass steam into the mold with a steam temperature of 125°C; control the pressure inside the mold at 0.23MPa, and perform a pressure-holding operation, and set the pressure-holding time to 5min.

[0086] Step 4: After the pressure holding operation is completed, release hot steam and spray water on the back of the mold to cool the mol...

Embodiment 3

[0094] A TiCp / EPS lost foam preparation process, comprising the following process steps:

[0095] Step 1: Mixing preparation: Ni powder is coated on the surface of TiC, 8 parts of TiC particles, 1 part of rare earth powder, 89 parts of EPS beads, 2 parts of binder are weighed by volume, and the weighed TiC particles, rare earth Powder, EPS beads, and binder are mixed evenly. Wherein, the particle size of the TiC particles is 1000 mesh, and the rare earth powder is rare earth magnesium powder.

[0096] Step 2: Preheat the mold so that the mold temperature reaches 100°C.

[0097] Step 3: Use compressed air to fill the mixed material into the mold, and pass steam into the mold with a steam temperature of 110°C; control the pressure inside the mold at 0.25MPa, and carry out the pressure-holding operation, and set the pressure-holding time to 7min.

[0098] Step 4: After the pressure holding operation is completed, release hot steam, spray water on the back of the mold to cool th...

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Abstract

The invention discloses a TiCp/EPS lost foam manufacturing technology and a steel matrix composite casting technology by means of a TiCp/EPS lost foam and relates to the technical field of composite lost foam casting in the metal forming field. The casting technology comprises manufacturing of a TiCp/EPS composite lost foam pattern, pattern coating material smearing, drying, a steel matrix composite lost foam negative pressure casting technology process, a pouring technology, a heat treatment technology and the like. TiC particles and a matrix are firmly combined, the TiC particles are evenlydispersed, the comprehensive mechanical property of a product is improved, and large-sized TiC reinforced steel matrix composite part in complicated shapes can be manufactured by means of lost foam casting.

Description

technical field [0001] The invention relates to the technical field of composite material lost foam casting in the field of metal forming, in particular to a TiCp / EPS lost foam casting forming process. Background technique [0002] TiC not only takes into account the strong corrosion resistance, oxidation resistance, high temperature stability and good electrical conductivity of the ceramic, so it can replace the expensive and complicated yttrium oxide and zirconia TiC because of its high melting point and high microhardness , high fracture toughness, low density and good thermal and chemical stability and many other excellent physical and chemical properties, and become one of the most suitable ceramics for reinforcing steel matrix composites. The research also shows that the wettability of TiC and steel is good, and the thermal expansion of TiC and steel matrix is ​​well matched, ensuring the excellent comprehensive mechanical properties of high hardness and high toughness...

Claims

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Application Information

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IPC IPC(8): B22C7/02B22C9/04B22D18/04B22D27/20
CPCB22C7/02B22C9/046B22D18/04B22D27/20
Inventor 谭建波
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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