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Method for forging blank heated by salt bath furnace

A salt-bath furnace and billet technology, which is applied in heat treatment baths, manufacturing tools, heat treatment equipment, etc., can solve problems such as uneven heating, high processing costs, and high energy consumption in production, and achieve stable and refined grain structure and smooth surface of billets. Good quality, good forging lubricity

Inactive Publication Date: 2008-04-30
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the heating of forging blanks used in aviation parts is generally carried out in electric furnaces. There are ordinary box-type electric furnaces and rotary hearth furnaces with better heat preservation effects. However, the principle of heating blanks in electric furnaces is well known, which is heat radiation conduction, so there must be The problem of long heating time and uneven heating leads to the disadvantages of large production energy consumption, low production efficiency and high production cost
At the same time, in order to improve the fluidity of the metal during the forging process, reduce the oxidation during the heating process and the wear of the mold, generally when forging superalloys, a series of treatments must be performed on the blank before heating: such as blowing the surface Sanding, degreasing, preparation of glass lubricant, billet preheating, coating of glass lubricant, and sand blowing after forging to remove the glass lubricant on the surface. The process is complex and requires extremely high levels of lubricant preparation and coating. , so that the processing cost increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0009] When the furnace temperature reaches 1130°C, the billets to be heated are fed into the furnace one by one until it is full, and the time is counted from the time when the first billet enters the furnace, and the first billet is taken out after the heating time of the first billet reaches 5 minutes Put it on a platform with a heating device, transfer it to the forging equipment for 5 seconds, and transfer it to the forging equipment for forging. At the same time, add another billet, calculate the time, cycle, heat, and forge in this way, and wait for the first batch of billets to enter the furnace for forging After the completion, the second batch is continued; repeat the above steps, first turn off the power of the furnace when the furnace is stopped, and put the starting electrode with a special tool before the molten salt hardens.

example 2

[0011] When the furnace temperature reaches 1140°C, the billets to be heated are fed into the furnace one by one until it is full, and the time is calculated from the time when the first billet enters the furnace, and the first billet is taken out after the heating time of the first billet reaches 4 minutes Put it on a platform with a heating device, transfer it to the forging equipment for 6 seconds, and then add another billet, calculate the time, cycle, heat and forge in this way, and wait for the first batch of billets to enter the furnace for forging After the completion, the second batch is continued; repeat the above steps, first turn off the power of the furnace when the furnace is stopped, and put the starting electrode with a special tool before the molten salt hardens.

example 3

[0013] When the furnace temperature reaches 1150°C, the billets to be heated are fed into the furnace one by one until it is full, and the time is counted from the time when the first billet enters the furnace, and the first billet is taken out after the heating time of the first billet reaches 3 minutes Put it on a platform with a heating device, transfer it to the forging equipment for 7 seconds, and transfer it to the forging equipment for forging. At the same time, add another billet, calculate the time, cycle, heat, and forge in this way, and wait for the first batch of billets to enter the furnace for forging After the completion, the second batch is continued; repeat the above steps, first turn off the power of the furnace when the furnace is stopped, and put the starting electrode with a special tool before the molten salt hardens.

[0014] Among them, the barium salt is industrial pure salt with a purity of more than 95%; the iron-silicon deoxidizer is industrial iron-...

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PUM

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Abstract

A method for heating forging billets through a salt bath furnace. The invention comprises the steps of empty furnace starting, and salt bath furnace desoxidantion, heating and furnace stopping, after desoxidantion and slag removal, when the furnace temperature reaches 1130 to 1150 DEG C, billets to be heated are fed into the furnace one by one, until the furnace is filled up, the time is calculated from the time when the first bullet is fed into the furnace, after the first billet is heated for 3 to 5 minutes, the first billet is taken out to position on a platform with a heating device, the transfer time is 5 to 7 seconds, the billet is transferred on a forging device to perform forging, simultaneously another billet is fed, to calculate time, the heating and the forging are performed in the circulation, and after the first batch of billets fed into the furnace are forged, the second batch of billets are fed in; the steps are repeated, and after the melted salt is hardened, a special-purpose tool used for a starting electrode is arranged in . The invention has the advantages that the heating speed is quick, and the forging lubricating property is good.

Description

technical field [0001] The invention belongs to the field of metal heating, in particular to the technology of heating a forging blank by using a salt bath furnace. Background technique [0002] At present, the heating of forging blanks used in aviation parts is generally carried out in electric furnaces. There are ordinary box-type electric furnaces and rotary hearth furnaces with better heat preservation effects. However, the principle of heating blanks in electric furnaces is well known, which is heat radiation conduction, so there must be The problem of long heating time and uneven heating leads to the disadvantages of large production energy consumption, low production efficiency and high production cost. At the same time, in order to improve the fluidity of the metal during the forging process, reduce the oxidation during the heating process and the wear of the mold, generally when forging superalloys, a series of treatments must be performed on the blank before heatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/46
Inventor 崔树森郑渠英李深亮邵勇韩立夫邰清安牛玉华陈立新
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION