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A kind of casting process method of graphite type titanium alloy casting

A casting process and titanium alloy technology, applied in the field of titanium alloy casting, can solve the problems of reducing the quality of casting products, turbulent flow of molten metal, and flow marks on the surface of castings, achieving good equipment adaptability, convenient production and operation, and slowing down the drop flow. Effect

Active Publication Date: 2020-10-16
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional gravity casting is a casting process in which the molten metal flows into the machined graphite mold in a static state through its own gravity. Due to the structure of the casting, the design of the runner will inevitably cause turbulent flow of the molten metal in the cavity due to the large height drop, which will cause the surface of the casting to Flow marks are formed, and the large drop will also cause the molten metal to solidify too quickly, resulting in uneven solidification, which cannot achieve sequential solidification and form shrinkage cavity defects; centrifugal casting is to rotate the graphite mold by mechanical means, and the molten metal is directly poured into the rotating graphite The casting mold makes it fast filling, reduces the heat energy loss during the casting process, and reduces the difference in superheat, thereby reducing the formation of shrinkage cavities. At the same time, centrifugal casting can also refine the grains and improve the quality of castings. As the centrifugal force increases, the linear velocity of the molten metal in the mold increases compared to the linear velocity of gravity casting. The impact of the molten metal on the inner wall of the graphite cavity may cause defects in graphite slag inclusions inside the casting, and the acceleration of the flow velocity may also cause graphite The more serious turbulent flow of molten metal in the cavity will cause flow marks on the surface of the casting and reduce the quality of the casting

Method used

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  • A kind of casting process method of graphite type titanium alloy casting
  • A kind of casting process method of graphite type titanium alloy casting
  • A kind of casting process method of graphite type titanium alloy casting

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Experimental program
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Effect test

Embodiment 1

[0046] A casting process method for a graphite-type titanium alloy casting, comprising the steps of:

[0047] (1) According to the graphite-type titanium alloy casting (take the optical backplane casting customized by a customer as an example, the casting is a plate-shaped casting with uniform wall thickness, the outline size is: 1030×341×60, the wall thickness is 22mm, figure 1 ), select different casting inclination angles, and build the sprue on the basis of the selected casting inclination angle. Among them, the main sprue of the casting is located at the level of the top surface, which is convenient for the sprue cup to overlap, and the ratio of the cross-sectional area of ​​the casting system Main sprue: horizontal sprue: ingate = 1:2:3, the main sprue is ￠80, and the ingate is set at the thick and large part of the casting, and the casting plan with the corresponding casting inclination angle is obtained; using Huazhu CAE The simulation software performs numerical simul...

Embodiment 2

[0051] A casting process method for a graphite-type titanium alloy casting, comprising the steps of:

[0052] (1) According to the three-dimensional digital model of a graphite-type titanium alloy casting, different casting inclination angles are selected, and the sprue is erected on the basis of the selected casting inclination angle to obtain a casting plan for the corresponding casting inclination angle; use Huazhu CAE simulation software Carry out numerical simulation on the casting plan. When the simulation result shows that the single size of the shrinkage cavity defect in the casting is less than 1.5mm, and the number of defects in each 100mm×100mm×100mm space volume is less than 5, it is determined as the best casting plan, and then the best casting angle is obtained. (45°); Then divide the digital model with the sprue set up on the basis of the best casting angle;

[0053] (2) According to the numerical control programming, program the digital model after the parting ...

Embodiment 3

[0056] A casting process method for a graphite-type titanium alloy casting, comprising the steps of:

[0057] (1) According to the three-dimensional digital model of a graphite-type titanium alloy casting, different casting inclination angles are selected, and the sprue is erected on the basis of the selected casting inclination angle to obtain a casting plan for the corresponding casting inclination angle; use Huazhu CAE simulation software Carry out numerical simulation on the casting plan. When the simulation result shows that the single size of the shrinkage cavity defect in the casting is less than 1.5mm, and the number of defects in each 100mm×100mm×100mm space volume is less than 5, it is determined as the best casting plan, and then the best casting angle is obtained. (35°); Then divide the digital model with the sprue set up on the basis of the best casting angle;

[0058] (2) According to the numerical control programming, program the digital model after the parting ...

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Abstract

The invention relates to the field of titanium alloy casting, in particular to a casting process method for a graphite-type titanium alloy casting. According to the three-dimensional digital model of the graphite-type titanium alloy casting, the present invention obtains the optimal casting angle by means of Huazhu CAE simulation software; Processed into graphite theoretical casting molds, after degassing treatment, the graphite theoretical casting molds are spliced ​​and grouped, and vacuum inclined centrifugal casting is carried out to obtain graphite-type titanium alloy castings. The invention can effectively slow down the drop flow of titanium liquid, so that the titanium liquid can achieve the purpose of sequential solidification, and through the feeding of centrifugal force, the casting can eliminate its internal shrinkage cavity defects, and at the same time can reduce the flow mark defects on the casting surface, and the overall improvement of titanium Improve the product quality of alloy castings, reduce subsequent repair welding and repair, shorten the product production cycle and reduce production costs.

Description

technical field [0001] The invention relates to the field of titanium alloy casting, in particular to a casting process method for a graphite-type titanium alloy casting. Background technique [0002] There are currently two relatively mature production methods for machining graphite-type titanium alloy castings, one is gravity casting (static casting), and the other is centrifugal casting. [0003] Conventional gravity casting is a casting process in which the molten metal flows into the machined graphite mold in a static state through its own gravity. Due to the structure of the casting, the design of the runner will inevitably cause turbulent flow of the molten metal in the cavity due to the large height drop, which will cause the surface of the casting to Flow marks are formed, and the large drop will also cause the molten metal to solidify too quickly, resulting in uneven solidification, which cannot achieve sequential solidification and form shrinkage cavity defects; c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D13/00B22D27/15
CPCB22D13/00B22D27/15
Inventor 贾国成孙宏喆乔海滨
Owner LUOYANG SUNRUI TI PRECISION CASTING
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