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Narrow groove precision casting method special for blades

A technology of blades and narrow grooves, which is applied in the precision casting field of narrow grooves dedicated to blades, can solve the problems of complex blade surface shape, poor narrow groove forming effect, and easy damage to the mold, so as to reduce mold deformation, facilitate demoulding, reduce The effect of forging temperature

Inactive Publication Date: 2021-01-01
MAANSHAN FANGYUAN POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the forming effect of the narrow groove of the blade is poor, and because the surface shape of the blade is complex, it is difficult to demould, and it is particularly easy to damage the mold

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A precision casting method for narrow grooves dedicated to blades, the specific operation steps are as follows:

[0021] (1) Make the mold of the casting with beeswax, and then apply the refractory material to form the outer mold. After heating and baking, the wax mold is completely melted to form a shell of the casting mold;

[0022] (2) Inject beeswax into the obtained shell again, and fill the ceramic core with the required shape with ceramic slurry into the beeswax, heat and bake again until the wax mold is completely melted, so as to obtain a complete mold with narrow grooves. blade mold;

[0023] (3) Grinding and blasting the obtained blade mold to remove the burrs on the blade mold;

[0024] (4) Preheat the blade mold obtained in the above steps, fix the preheated impeller shell on the centrifugal casting machine, start the centrifugal casting machine, and control the rotational speed of the centrifugal casting machine to 1000r / min;

[0025] (5) Pour the nickel...

Embodiment 2

[0032] A precision casting method for narrow grooves dedicated to blades, the specific operation steps are as follows:

[0033] (1) Make the mold of the casting with beeswax, and then apply the refractory material to form the outer mold. After heating and baking, the wax mold is completely melted to form a shell of the casting mold;

[0034] (2) Inject beeswax into the obtained shell again, and fill the ceramic core with the required shape with ceramic slurry into the beeswax, heat and bake again until the wax mold is completely melted, so as to obtain a complete mold with narrow grooves. blade mold;

[0035] (3) Grinding and blasting the obtained blade mold to remove the burrs on the blade mold;

[0036] (4) Preheat the blade mold obtained in the above steps, fix the preheated impeller shell on the centrifugal casting machine, start the centrifugal casting machine, and control the rotational speed of the centrifugal casting machine to 800r / min;

[0037] (5) Pour the nickel-...

Embodiment 3

[0044] A precision casting method for narrow grooves dedicated to blades, the specific operation steps are as follows:

[0045] (1) Make the mold of the casting with beeswax, and then apply the refractory material to form the outer mold. After heating and baking, the wax mold is completely melted to form a shell of the casting mold;

[0046] (2) Inject beeswax into the obtained shell again, and fill the ceramic core with the required shape with ceramic slurry into the beeswax, heat and bake again until the wax mold is completely melted, so as to obtain a complete mold with narrow grooves. blade mold;

[0047] (3) Grinding and blasting the obtained blade mold to remove the burrs on the blade mold;

[0048] (4) Preheat the blade mold obtained in the above steps, fix the preheated impeller shell on the centrifugal casting machine, start the centrifugal casting machine, and control the rotational speed of the centrifugal casting machine to 1500r / min;

[0049] (5) Pour the nickel...

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Abstract

The invention discloses a narrow groove precision casting method special for blades. The precision casting method comprises the following specific operation steps that (1) a blade mold shell is manufactured; (2) a narrow groove of the blade mold is manufactured; (3) grinding and sand blasting are conducted, and burrs on the blade mold are removed; (4) centrifugal machine casting is conducted; (5)casting and mold filling are conducted; (6) cooling and solidifying are conducted; and (7) molding and demolding are conducted. According to the method, the shell of the casting mold is firstly manufactured through the dewaxing method, beeswax is added again, a ceramic core is added into the beeswax to form the narrow groove, and the adopted ceramic core is the best inner core material cast through the dewaxing method and can still keep stable when metal is cast; and a hydrogen element is added in the centrifugal casting mold filling process, so that the whole mold can be filled with a nickelmatrix high-temperature alloy, a blade can be better formed, sand holes are not formed in the cast blade, meanwhile, the forging temperature is reduced, the mold deformation and the mold abrasion degree are reduced, and demolding is better facilitated.

Description

technical field [0001] The invention relates to the technical field of precision casting of blades, in particular to a precision casting method for narrow slots dedicated to blades. Background technique [0002] Turbine blades are an important component of the turbine section in a gas turbine engine. The high-speed rotating blades are responsible for sucking the high-temperature and high-pressure airflow into the combustor to maintain the engine's work. At the same time, in order to improve the efficiency of the turbine, the surface shape of the turbine blade is usually designed as a twisted narrow groove with a variable cross-section and a complex shape. Therefore, the precise geometric modeling of turbine blades has become a necessary prerequisite for turbine machining. [0003] In the prior art, the forming effect of the narrow groove of the blade is poor, and because the surface shape of the blade is complicated, demoulding is difficult, and the mold is particularly eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C9/22B22D13/00
CPCB22C9/04B22C9/22B22D13/00
Inventor 朱玉亮董金山郑有为何芳
Owner MAANSHAN FANGYUAN POWER TECH
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