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Semi-continuous fine grain high-temperature master alloy casting process

A high-temperature master alloy and casting process technology, applied in the field of metal materials, can solve problems such as coarse grains and poor surface quality, and achieve the effect of smooth surface, low cost and easy control

Inactive Publication Date: 2018-04-20
江苏奇纳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of poor surface quality and coarse crystal grains existing in existing high-temperature master alloys, the present invention adopts high-temperature casting, electromagnetic stirring, and paste solidification to produce high-quality high-temperature master alloys. The process is simple and low in cost, and is suitable for Industrial production

Method used

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  • Semi-continuous fine grain high-temperature master alloy casting process
  • Semi-continuous fine grain high-temperature master alloy casting process
  • Semi-continuous fine grain high-temperature master alloy casting process

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Step 1: Melting K418 high-temperature master alloy in a 1000KG vacuum induction furnace, the melting point of K418 is 1320°C, the controlled refining temperature is 1580°C, the casting temperature is 1460°C, and the superheat is 140°C;

[0035] Step 2: Place multiple sets of metal or ceramic modules 3 on the mobile trolley, place the mobile trolley 2 between the parallel electromagnetic stirrers 1, move the modules to the middle of the electromagnetic stirrer 1 through the mobile trolley 2, and place the modules at the bottom The use of thermal insulation materials prevents heat loss and rapid temperature drop;

[0036] Step 3: Cast the high-temperature master alloy obtained in Step 1 into a mold set, the baking temperature of the metal mold set is 400°C, and start the electromagnetic stirring system;

[0037] Step 4, stir with the electromagnetic stirrer 1 according to the set stirring process parameters, the stirring parameters are: stirring current 400A, stirring fre...

Embodiment 2

[0040] Step 1: Melting K213 high-temperature master alloy in a 500KG vacuum induction furnace, the melting point of K213 is 1340°C, the controlled refining temperature is 1600°C, the casting temperature is 1480°C, and the superheat is 150°C;

[0041] Step 2: Place multiple sets of metal or ceramic modules 3 on the mobile trolley, place the mobile trolley 2 between the parallel electromagnetic stirrers 1, move the modules to the middle of the electromagnetic stirrer 1 through the mobile trolley 2, and place the modules at the bottom The use of thermal insulation materials prevents heat loss and rapid temperature drop;

[0042] Step 3: Cast the high-temperature master alloy obtained in Step 1 into a mold set, the baking temperature of the metal mold set is 650°C, and start the electromagnetic stirring system;

[0043] Step 4: Stir with the electromagnetic stirrer 1 according to the set stirring process parameters, the stirring parameters are: stirring current 250A, stirring freq...

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Abstract

The invention belongs to the technical field of metal materials, and in particular relates to a casting process of a semi-continuous fine-grained high-temperature master alloy; the invention discloses a casting process of a semi-continuous fine-grained high-temperature master alloy, which comprises the following steps: Step 1, preparing an overheated high-temperature master alloy Alloy melts, induction melting high temperature alloys under vacuum conditions, so that the pouring superheat is 100 ℃ ~ 150 ℃; step 2, put multiple groups of metal or ceramic modules on the mobile trolley, and place the mobile trolley on a parallel electromagnetic stirrer In between, the module is moved to the middle of the electromagnetic stirrer by moving the trolley, and the bottom of the module is made of heat insulating material to prevent heat loss and rapid temperature drop; step 3, cast the high-temperature master alloy obtained in step 1 into the module, and start electromagnetic stirring system; step 4, stir with an electromagnetic stirrer according to the set stirring process parameters, stop stirring after the alloy is completely solidified, move the mold car, and start pouring the next mold group.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a semi-continuous fine-grain high-temperature master alloy casting process. Background technique [0002] With the emergence of rapid solidification furnaces, the rapid solidification method is currently adopted in turbo casting in the automotive turbine industry, and the requirements for high-temperature master alloys are getting higher and higher. One is to require good surface quality. The traditional method is to reduce the shrinkage cavity problem in the metal center. Low-temperature casting is adopted, resulting in insufficient surface filling, rough surface, and large waste of material surface processing; the second is to require small grains. Due to Due to the genetic characteristics of liquid metal, the turbine made by the rapid solidification furnace will inherit the microstructure characteristics of the master alloy. Too coarse structure will cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/02
CPCB22D27/02
Inventor 彭伟平李硕金开锋周志坚
Owner 江苏奇纳新材料科技有限公司
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