Temperature-control solidification method for Ti55 cast high-temperature titanium alloy

A technology for high-temperature titanium alloy and alloy ingot, which is applied in the field of high-temperature titanium alloy casting melting and solidification, and the temperature-controlled solidification field of Ti55 casting high-temperature titanium alloy. Expansion, simple operation process, the effect of improving the yield

Active Publication Date: 2017-07-28
重庆两航金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies of shrinkage porosity, shrinkage cavities and poor apparent quality of titanium alloys after castin

Method used

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  • Temperature-control solidification method for Ti55 cast high-temperature titanium alloy
  • Temperature-control solidification method for Ti55 cast high-temperature titanium alloy
  • Temperature-control solidification method for Ti55 cast high-temperature titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The concrete process of this embodiment is:

[0038] Step 1, coat and hang the mold. Print out the designed cracking cup mold with 3D, paint and hang the mold and let it dry. When coating and hanging, 2 layers, 2 layers, 3 layers, and 1 layer are respectively coated on the surface layer, transition layer, back layer, and sealing layer of the mold; the coating material of the fabric is pure yttrium oxide, and the coated mold is obtained.

[0039] Step 2, dewaxing and roasting. Put the dried mold in an electric blast drying oven for dewaxing treatment: raise the temperature of the electric blast drying oven to 150°C; put the dried mold in the electric blast drying oven for 2 hours; after the heat preservation, the The electric blast drying oven continues to heat up to 170 ° C for 2 hours to complete the dewaxing of the mold and obtain the mold shell. Roast the dewaxed formwork in a high-temperature box furnace, specifically: raise the temperature of the high-temperatur...

Embodiment 2

[0045] A temperature-controlled solidification method for casting a high-temperature titanium alloy according to the present embodiment is carried out in the following steps:

[0046] Step 1, coat and hang the mold. Print out the designed cracking cup mold with 3D, paint and hang the mold and let it dry. When coating and hanging, 2 layers, 2 layers, 3 layers, and 1 layer are respectively coated on the surface layer, transition layer, back layer, and sealing layer of the mold; the coating material of the fabric is pure yttrium oxide, and the coated mold is obtained.

[0047] Step 2, dewaxing and roasting. Put the dried mold in an electric blast drying oven for dewaxing treatment: raise the temperature of the electric blast drying oven to 150°C; put the dried mold in the electric blast drying oven for 2 hours; after the heat preservation, the The electric blast drying oven continues to heat up to 170 ° C for 2 hours to complete the dewaxing of the mold and obtain the mold shel...

Embodiment 3

[0053] A temperature-controlled solidification method for casting a high-temperature titanium alloy according to the present embodiment is carried out in the following steps:

[0054] Step 1, coat and hang the mold. Print out the designed cracking cup mold with 3D, paint and hang the mold and let it dry. When coating and hanging, 2 layers, 2 layers, 3 layers, and 1 layer are respectively coated on the surface layer, transition layer, back layer, and sealing layer of the mold; the coating material of the fabric is pure yttrium oxide, and the coated mold is obtained.

[0055] Step 2, dewaxing and roasting. Put the dried mold in an electric blast drying oven for dewaxing treatment: raise the temperature of the electric blast drying oven to 150°C; put the dried mold in the electric blast drying oven for 2 hours; after the heat preservation, the The electric blast drying oven continues to heat up to 170 ° C for 2 hours to complete the dewaxing of the mold and obtain the mold shel...

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Abstract

The invention discloses a temperature-control solidification method for Ti55 cast high-temperature titanium alloy. The method comprises the steps that a mould shell is heated in vacuum to 600-950 DEG C, the temperature is kept constant for 1-2 h, then, pouring is carried out, the metal liquid cooling speed is controlled in the solidification process, heat preservation is kept for 15-60 min at 500-900 DEG C, furnace cooling is carried out, and therefore the purpose of eliminating cracks in a casting process is achieved. Meanwhile, the obtained casting is better in surface smoothness, the mold filling performance and structure compactness of the titanium alloy casting are improved, and the cracking and deformation problems in the casting process are effectively eliminated.

Description

technical field [0001] The invention belongs to the field of titanium alloy casting, and relates to a melting and solidification method for high-temperature titanium alloy casting, in particular to a temperature-controlled solidification method for Ti55 casting high-temperature titanium alloy. Background technique [0002] Due to the advantages of low density, high specific strength and corrosion resistance, titanium and titanium alloys have been widely used in aviation, aerospace, marine transportation, chemical metallurgy, medical treatment and other fields. High-temperature titanium alloys are developed to improve the thrust-to-weight ratio of aero-engines, including traditional high-temperature titanium alloys with solid solution strengthening as the main strengthening method and Ti-Al intermetallic compounds with orderly strengthening. The high-temperature titanium alloys mentioned in this paper Titanium alloy is near α titanium alloy, and its service temperature is 560...

Claims

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Application Information

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IPC IPC(8): B22D27/04B22D21/00
CPCB22D21/005B22D27/04
Inventor 寇宏超黄婷婷孙智刚王军唐斌李金山
Owner 重庆两航金属材料有限公司
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