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Cast forming method of small titanium alloy or titanium-aluminum alloy complicated casting

A titanium-aluminum alloy and casting forming technology, which is applied in the casting field of titanium alloy or titanium-aluminum alloy castings, can solve the problems of incapable of casting forming shape, low material utilization rate, complicated centrifugal casting method and process, etc. Low cost and wide application range

Inactive Publication Date: 2011-04-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that the gravity casting of the existing titanium alloy components is difficult to make the mold filling smoothly, the centrifugal casting method is complex in process, the material utilization rate is low, and the metal mold bottom leakage vacuum suction casting method cannot cast thin-walled parts with complex shapes. To solve the technical problems, a method for casting and forming of small titanium alloy or titanium aluminum alloy complex castings is provided

Method used

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  • Cast forming method of small titanium alloy or titanium-aluminum alloy complicated casting
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  • Cast forming method of small titanium alloy or titanium-aluminum alloy complicated casting

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specific Embodiment approach 1

[0008] Specific implementation mode one: (see attached figure 1 and figure 2 ) The casting method of a small-sized titanium alloy or titanium-aluminum alloy complex casting of the present embodiment is carried out according to the following steps: 1. The gas-permeable shell 8 of titanium alloy or titanium-aluminum alloy casting is prepared by the method of investment casting in the prior art ; Two, prepare the bottom leakage type vacuum suction casting container 7, this container 7 is made up of cavity 7-2 and loam cake 7-1, has ventilation hole 7-3 on the side wall of cavity body 7-2, loam cake 7 -1 has a gate 7-5, and the upper surface of the upper cover 7-1 has an annular sealing groove 7-4, and the gate 7-5 is located in the ring of the sealing groove 7-4; 3. Prepare step 1 The molded shell 8 is fixed in the container 7 prepared in step 2 with an air-permeable filler 9, the container loam cake 7-1 is covered, the sealing ring 5 is installed in the sealing groove 7-4 of t...

specific Embodiment approach 2

[0010] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, when using the investment casting method to prepare the shell 8 of titanium alloy or titanium aluminum alloy casting, the particle size of the surface sand is 80 mesh to 100 mesh. mesh, the particle size of the second layer sand is 20 mesh to 40 mesh, and the particle size of the back layer sand is 8 mesh to 20 mesh. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Specific embodiment three: the difference between this embodiment and specific embodiment one is: when using investment casting method to prepare the shell 8 of titanium alloy or titanium aluminum alloy casting in step one, the grain size of surface sand is 90 mesh, two The particle size of the layer sand is 30 mesh, and the particle size of the back layer sand is 16 mesh. Others are the same as in the first embodiment.

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Abstract

The invention relates to a cast forming method of a small titanium alloy or titanium-aluminum alloy complicated casting, belonging to the casting method of the titanium alloy or titanium-aluminum alloy casting and solving the technical problems that the gravity casting of the traditional titanium alloy member is difficult in smooth mold filling, the centrifugal casting method has complicated process, the material utilization rate is low and the metal bottom-drain type vacuum suction casting method cannot be used for casting and forming thin-walled parts with complicated shapes. The method comprises the steps of: 1. preparing a ventilating shell; 2. preparing a bottom drain type vacuum suction casting container; 3. fixing the shell in the container, fixing the container in a suction casting chamber of a smelting furnace; 4. carrying out electric arc melting on the titanium alloy or titanium-aluminum alloy raw materials to obtain a button ingot; 5. turning the button ingot to a suction casting crucible for smelting to obtain overheating melt; and 6. suction-casting and mold-filling, and cooling to finally obtain the casting. The yield by the method is not less than 90 percent; and the method is a simple near net shape forming method, can be used for preparing a titanium and titanium-aluminum alloy blade, a worm wheel, artware and other small complicated castings.

Description

technical field [0001] The invention relates to a casting method of a titanium alloy or a titanium-aluminum alloy casting. Background technique [0002] Titanium is not a rare metal, and ranks fourth among the most abundant structural metals, second only to aluminum, iron, and magnesium. However, because the price of producing pure titanium is very high, the price of titanium alloys is very high. With the decline of the cost of sponge titanium, the price of titanium alloys has decreased, the continuous development of new titanium alloy materials and the increase of titanium varieties, the application of titanium in military and civilian industries has gradually increased. Casting is an important method for preparing titanium alloy components. The casting methods of titanium alloy mainly include gravity casting, centrifugal casting, investment casting, and anti-gravity low-pressure casting. In civilian products, such as automobile exhaust valves, engine valves, watch casing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/06B22C9/04B22D21/06
Inventor 苏彦庆骆良顺刘卫强董福宇叶喜葱郭景杰李新中傅恒志
Owner HARBIN INST OF TECH
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