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Method of roasting profiled shell for fine casting of titanium-based alloy investment pattern based on rapid prototyping

A titanium-based alloy and prototype technology, applied in the direction of casting mold, core, casting mold composition, etc., can solve the problems of bulging and cracking shells, running out of fire, etc., and achieve the effect of increased strength and uniform heating

Inactive Publication Date: 2011-12-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing shell roasting process based on rapid prototyping is easy to expand and burst the shell and thus lead to the problem of "fire escape", and provides a titanium-based alloy investment casting mold based on rapid prototyping Shell roasting method

Method used

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Examples

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specific Embodiment approach 1

[0008] Specific embodiment one: the roasting method of the titanium-based alloy investment casting mold shell based on rapid prototyping in this embodiment is carried out according to the following steps: 1. After the mold shell is dried, put the mold shell sprue cup downward into 200~500 In the roasting furnace at ℃, place the shell at 1 / 2~1 / 3 of the entire furnace cavity length away from the furnace door, open the furnace door by 1 / 5~1 / 2, and after roasting for 10~30min, blow in Gas, the gas supply time is 20~60min, then close the furnace door, raise the temperature to 800~1000℃, keep it warm for 1~3h, and cool the furnace to room temperature; , using a compressed air tube to extend into the bottom of the shell to remove the residual ash generated by roasting, that is, to realize the roasting of the shell for titanium-based alloy investment casting based on rapid prototype.

[0009] The shell preparation method in step 1 of this embodiment is as follows: the casting system u...

specific Embodiment approach 2

[0016] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the sprue cup of the mold shell is loaded downward into a roasting furnace at 300-400°C. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0017] Embodiment 3: This embodiment is different from Embodiment 1 in that: in step 1, the sprue cup of the mold shell is placed downwards into a roasting furnace at 350°C. Other steps and parameters are the same as those in the first embodiment.

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Abstract

The invention relates to a method of roasting a profiled shell for fine casting of a titanium-based alloy investment pattern based on rapid prototyping, which belongs to the method of roasting the profiled shell for casting of the investment pattern and solves the problem that the profiled shell can be easily burst in the existing profiled shell roasting process based on rapid prototyping, thereby causing fire running-out. The method comprises the following steps: 1, placing a profiled shell in a roasting furnace for treatment; and 2, placing the profiled shell upside down after processing the profiled shell according to Step 1, touching the peripheral edge of a pouring cup by hand, and extending a compressed air tube into the bottom end of the profiled shell to remove ash generated in roasting, thereby realizing the roasting of the profiled shell for fine casting of the titanium-based alloy investment pattern based on the rapid prototyping. The roasting method of the invention solvesthe problem of busting of the profiled shell, thereby avoiding the fire running-out during the casting process.

Description

technical field [0001] The invention relates to a roasting method of a mold shell for investment casting. Background technique [0002] Due to their excellent comprehensive properties, titanium and titanium alloys are widely used in military and civilian fields such as aviation, aerospace, ships, weapons, electronics, petroleum, chemical industry and medical treatment. At present, titanium alloys are mainly used in aerospace and military industries. According to statistics, the application of titanium in aerospace accounts for about 75% of the total output of titanium, including military aircraft, civil aircraft, aero-engines, spacecraft, fuel tanks, and artificial satellite housing connection seats. In recent years, the aviation industry has become more and more urgent for materials with high strength, high elastic modulus, low density and high temperature resistance, which has greatly promoted the rapid development of titanium manufacturing industry. The preparation of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/12
Inventor 陈玉勇孔凡涛赵而团肖树龙田竟陈艳飞
Owner HARBIN INST OF TECH
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