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Manufacturing method for improving cast K4169 high-temperature alloy welding quality

A high-temperature alloy and welding quality technology, which is applied in the manufacturing field of improving the welding quality of cast K4169 superalloy, can solve the problems of affecting the progress of production and scientific research, the decline of welding quality, and the low pass rate of repair welding, so as to shorten the production and development cycle, The effect of improving the pass rate and improving the welding performance

Inactive Publication Date: 2013-09-04
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The as-cast K4169 superalloy is currently being widely used as a casting material for large thin-walled casings of aero-engines. However, due to the fact that this material is prone to welding cracks during the welding process, the defect parts of the casting are repaired repeatedly, which affects the production. The progress of scientific research, and the reduced production and development efficiency
In the process of production and development of the large thin-walled casing and turbine rear casing of the new machine, it was found that when repair welding is performed on the defective parts of the casting, the qualified rate of repair welding is very low, and with the increase in the number of repair welding times, the welding quality of individual parts Significant decline, seriously affecting the progress of production and scientific research

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  • Manufacturing method for improving cast K4169 high-temperature alloy welding quality

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Embodiment 1

[0017] This embodiment provides a manufacturing method for improving the welding quality of the as-cast K4169 superalloy, which is characterized in that: in the manufacturing method for improving the welding quality of the as-cast K4169 superalloy, the as-cast K4169 superalloy casting needs to be uniformly welded before welding. Chemical and solution treatment and aging treatment, the parameters are as follows:

[0018] Homogenization treatment: the heating temperature is 1020°C; the holding time is 0.5 hours; the cooling method is to fill with protective gas, which is equivalent to air cooling speed cooling;

[0019] Solution treatment: the heating temperature is 950°C; the holding time is 1 hour; the cooling method is filled with protective gas, cooled to 750°C by furnace at 400°C / h, and air-cooled;

[0020] Aging treatment: heating temperature 720°C; holding time 8 hours; cooling method is filled with protective gas, furnace cooled to 610°C at a rate of 40°C / hour, kept for ...

Embodiment 2

[0025] This embodiment provides a manufacturing method for improving the welding quality of the as-cast K4169 superalloy, which is characterized in that: in the manufacturing method for improving the welding quality of the as-cast K4169 superalloy, the as-cast K4169 superalloy casting needs to be uniformly welded before welding. Chemical and solution treatment and aging treatment, the parameters are as follows:

[0026] Homogenization treatment: the heating temperature is 1000°C; the holding time is 2 hours; the cooling method is to fill with protective gas, which is equivalent to air cooling;

[0027] Solution treatment: the heating temperature is 955°C; the holding time is 1 hour; the cooling method is filled with protective gas, cooled to 755°C by furnace at 500°C / h, and air-cooled;

[0028] Aging treatment: heating temperature 720°C; holding time 8 hours; cooling method is filled with protective gas, furnace cooled to 620°C at a rate of 50°C / hour, kept for 8 hours, and air...

Embodiment 3

[0032] This embodiment provides a manufacturing method for improving the welding quality of the as-cast K4169 superalloy, which is characterized in that: in the manufacturing method for improving the welding quality of the as-cast K4169 superalloy, the as-cast K4169 superalloy casting needs to be uniformly welded before welding. Chemical and solution treatment and aging treatment, the parameters are as follows:

[0033] Homogenization treatment: the heating temperature is 1200°C; the holding time is 3 hours; the cooling method is to fill with protective gas, which is equivalent to the cooling speed of air cooling;

[0034] Solution treatment: the heating temperature is 1000°C; the holding time is 1 hour; the cooling method is to fill with protective gas, cool in a furnace at 600°C / h to 760°C, and then air cool;

[0035] Aging treatment: heating temperature 720°C; holding time 8 hours; cooling method is filled with protective gas, furnace cooled to 630°C at a rate of 60°C / hour,...

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Abstract

The invention relates to a manufacturing method for improving the cast K4169 high-temperature alloy welding quality. The method is characterized in that a cast K4169 high-temperature alloy casting adopted by the manufacturing method for improving the cast K4169 high-temperature alloy welding quality needs to be subjected to homogenization and solid solution treatment and aging treatment before welding, wherein parameters are as follows: homogenization treatment: the heating temperature is 1000-1200 DEG C; the insulating time is 0.5-3 hours; the cooling mode is filling of protective gasses, which has the same effect with that of air cooling velocity cooling; solid solution treatment: the heating temperature is 950-1000 DEG C; the insulating time is 1 hour; the cooling mode comprises filling of protective gasses, furnace cooling to be 750-760 DEG C and air cooling; and aging treatment: the heating temperature is 720 DEG C; the insulating time takes 8 hours; and the cooling mode comprises filling of protective gasses, furnace cooling to be 610-630 DEG C, insulating for 8 hours and air cooling. The method has the advantages that the welding acceptability is greatly improved and reaches above 75%, and the production and development periods are greatly shortened.

Description

technical field [0001] The invention relates to the field of welding of large thin-walled casing parts of aero-engines, in particular to a manufacturing method for improving the welding quality of cast K4169 superalloy. Background technique [0002] The as-cast K4169 superalloy is currently being widely used as a casting material for large thin-walled casings of aero-engines. However, due to the fact that this material is prone to welding cracks during the welding process, the defect parts of the casting are repaired repeatedly, which affects the production. The progress of scientific research has also reduced the efficiency of production and development. In the process of production and development of the large thin-walled casing and turbine rear casing of the new machine, it was found that when repair welding is performed on the defective parts of the casting, the qualified rate of repair welding is very low, and with the increase in the number of repair welding times, the...

Claims

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Application Information

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IPC IPC(8): C22F1/10
Inventor 费晶王铁军白素春孙长波张春涛
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION