CN103276332A - Manufacturing method for improving cast K4169 high-temperature alloy welding quality - Google Patents
Manufacturing method for improving cast K4169 high-temperature alloy welding quality Download PDFInfo
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- CN103276332A CN103276332A CN2013101748994A CN201310174899A CN103276332A CN 103276332 A CN103276332 A CN 103276332A CN 2013101748994 A CN2013101748994 A CN 2013101748994A CN 201310174899 A CN201310174899 A CN 201310174899A CN 103276332 A CN103276332 A CN 103276332A
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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
The present invention relates to the welding field of aircraft engine large thin-wall casing base part, particularly a kind of manufacture method that improves as cast condition K4169 superalloy welding quality.
Background technology
As cast condition K4169 superalloy is widely used at present as the cast material of aircraft engine large thin-wall casing, but because this material is in welding process, welding crack appears easily, cause the rejected region repair welding repeatedly of foundry goods, both influenced the progress of production scientific research, the production development efficient that reduces again.In the production triturating of new machine large thin-wall casing turbine rear housing, find, when repair welding was carried out at the casting defect position, the qualification rate of repair welding was very low, and increasing along with the repair welding number of times, the welding quality at indivedual positions obviously descends, and has had a strong impact on the progress of production scientific research.
Summary of the invention
The objective of the invention is for the welding quality that promotes foundry goods, reduce welding times, enhance productivity, the spy provides a kind of manufacture method that improves as cast condition K4169 superalloy welding quality.
The invention provides a kind of manufacture method that improves as cast condition K4169 superalloy welding quality, it is characterized in that: the manufacture method of described raising as cast condition K4169 superalloy welding quality, as cast condition K4169 superalloy foundry goods needs to carry out homogenizing and solution treatment and ageing treatment before welding, parameter is as follows:
Homogenizing is handled: Heating temperature is 1000～1200 ℃; Soaking time 0.5～3 hour; The type of cooling is equivalent to the cooling of air cooling speed for filling protective gas;
Solution treatment: Heating temperature is 950～1000 ℃; Soaking time is 1 hour; The type of cooling is chilled to 750～760 ℃ with 400-600 ℃/h stove, air cooling for filling protective gas;
Ageing treatment: 720 ℃ of Heating temperatures; Soaking time 8 hours; The type of cooling is chilled to 610～630 ℃ for filling protective gas with 40-60 ℃ of/hour speed stove, is incubated 8 hours, air cooling;
After foundry goods was handled through homogenizing, weave construction was hexahedral centroid structure austenite structure, and the phenomenon of component segregation reduces, and the harmful item parts in the composition is added in the matrix, and it is even that global tissue is tending towards; Foundry goods is through after the solution treatment, and performance is further promoted; Ageing treatment is to carry out after foundry goods processing, and purpose is the use properties that further promotes alloy by the precipitated phase of superalloy.
Its strengthening phase of K4169 alloy of as cast condition is mainly formed by the Ni3Nb precipitated phase, and especially under the timeliness state, the Ni3Nb that disperse distributes becomes γ to reach the high temperature endurance performance that γ ' phase has greatly improved alloy at room temperature intensity and alloy mutually, thisly represents with the A3B form.As the Ni in the alloy, Nb element during with the form combination of A2B, AB, every performance index of alloy obviously reduce, this harmful phase, both the Laves phase constitution of being called as mutually.This tissue not only reduces the performance of alloy, and easily facilitates the generation of alloy internal fissure, the welding property of the foundry goods that deteriorates significantly.By improving casting technique, improve casting technological parameter and can not eliminate the Laves phase constitution effectively, but this tissue comprises hot isostatic pressing by the method for vacuum heat treatment, then effectively reduces the content of this tissue.The theory and practice proof through pyroprocessing, under the condition of cooling off fast, can effectively reduce the Laves phase constitution in the alloy at as cast condition K4169 superalloy then, and the welding property for alloy promotes and can be improved greatly like this.
By as cast condition K4169 superalloy rejected region is adopted local heat treatment, the mode of cooling off is fast then improved the as-cast structure of rejected region, thereby has promoted the welding quality of rejected region.Because the local heating temperature of foundry goods is not higher than foundry goods homogenizing treatment temp, also to pass through solution treatment after the foundry goods welding, therefore adopt this technology to the not influence of total quality of foundry goods, but then have great importance for the welding quality that promotes foundry goods.
Before not adopting this technology, to the solder yield less than 50% of foundry goods thin-wall regions rejected region, when the welding more than three times, the solder yield less than 30% of most solder joints in order to promote welding effect, has to enlarge defect area sometimes.
Advantage of the present invention:
The manufacture method of raising as cast condition K4169 superalloy welding quality of the present invention, because foundry goods thin-wall regions rejected region has been carried out partial heat treatment, therefore the qualification rate of welding improves greatly.Solder yield reaches more than 75%, has shortened process lead time greatly.Foundry goods also has the secondary solution heat treatment in operation afterwards, in foundry goods processing also effective thermal treatment of back, so adopt method that partial heat treatment improves welding property that the performance of foundry goods is not had detrimentally affect.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and the embodiments:
Fig. 1 is the sample welding synoptic diagram.
Embodiment
Embodiment 1
Present embodiment provides a kind of manufacture method that improves as cast condition K4169 superalloy welding quality, it is characterized in that: the manufacture method of described raising as cast condition K4169 superalloy welding quality, as cast condition K4169 superalloy foundry goods needs to carry out homogenizing and solution treatment and ageing treatment before welding, parameter is as follows:
Homogenizing is handled: Heating temperature is 1020 ℃; Soaking time 0.5 hour; The type of cooling is equivalent to the cooling of air cooling speed for filling protective gas;
Solution treatment: Heating temperature is 950 ℃; Soaking time is 1 hour; The type of cooling is chilled to 750 ℃ with 400 ℃/h stove, air cooling for filling protective gas;
Ageing treatment: 720 ℃ of Heating temperatures; Soaking time 8 hours; The type of cooling is chilled to 610 ℃ for filling protective gas with 40 ℃ of/hour speed stoves, is incubated 8 hours, air cooling;
After foundry goods was handled through homogenizing, weave construction was hexahedral centroid structure austenite structure, and the phenomenon of component segregation reduces, and the harmful item parts in the composition is added in the matrix, and it is even that global tissue is tending towards; Foundry goods is through after the solution treatment, and performance is further promoted; Ageing treatment is to carry out after foundry goods processing, and purpose is the use properties that further promotes alloy by the precipitated phase of superalloy.
Its strengthening phase of K4169 alloy of as cast condition is mainly formed by the Ni3Nb precipitated phase, and especially under the timeliness state, the Ni3Nb that disperse distributes becomes γ to reach the high temperature endurance performance that γ ' phase has greatly improved alloy at room temperature intensity and alloy mutually, thisly represents with the A3B form.As the Ni in the alloy, Nb element during with the form combination of A2B, AB, every performance index of alloy obviously reduce, this harmful phase, both the Laves phase constitution of being called as mutually.This tissue not only reduces the performance of alloy, and easily facilitates the generation of alloy internal fissure, the welding property of the foundry goods that deteriorates significantly.By improving casting technique, improve casting technological parameter and can not eliminate the Laves phase constitution effectively, but this tissue comprises hot isostatic pressing by the method for vacuum heat treatment, then effectively reduces the content of this tissue.The theory and practice proof through pyroprocessing, under the condition of cooling off fast, can effectively reduce the Laves phase constitution in the alloy at as cast condition K4169 superalloy then, and the welding property for alloy promotes and can be improved greatly like this.
By as cast condition K4169 superalloy rejected region is adopted local heat treatment, the mode of cooling off is fast then improved the as-cast structure of rejected region, thereby has promoted the welding quality of rejected region.Because the local heating temperature of foundry goods is not higher than foundry goods homogenizing treatment temp, also to pass through solution treatment after the foundry goods welding, therefore adopt this technology to the not influence of total quality of foundry goods, but then have great importance for the welding quality that promotes foundry goods.As shown in Figure 1, the weld does not have any metallurgical imperfection.
Embodiment 2
Present embodiment provides a kind of manufacture method that improves as cast condition K4169 superalloy welding quality, it is characterized in that: the manufacture method of described raising as cast condition K4169 superalloy welding quality, as cast condition K4169 superalloy foundry goods needs to carry out homogenizing and solution treatment and ageing treatment before welding, parameter is as follows:
Homogenizing is handled: Heating temperature is 1000 ℃; Soaking time 2 hours; The type of cooling is equivalent to the cooling of air cooling speed for filling protective gas;
Solution treatment: Heating temperature is 955 ℃; Soaking time is 1 hour; The type of cooling is chilled to 755 ℃ with 500 ℃/h stove, air cooling for filling protective gas;
Ageing treatment: 720 ℃ of Heating temperatures; Soaking time 8 hours; The type of cooling is chilled to 620 ℃ for filling protective gas with 50 ℃ of/hour speed stoves, is incubated 8 hours, air cooling;
After foundry goods was handled through homogenizing, weave construction was hexahedral centroid structure austenite structure, and the phenomenon of component segregation reduces, and the harmful item parts in the composition is added in the matrix, and it is even that global tissue is tending towards; Foundry goods is through after the solution treatment, and performance is further promoted; Ageing treatment is to carry out after foundry goods processing, further promotes the use properties of alloy by the precipitated phase of superalloy.
By as cast condition K4169 superalloy rejected region is adopted local heat treatment, the mode of cooling off is fast then improved the as-cast structure of rejected region, thereby has promoted the welding quality of rejected region.Because the local heating temperature of foundry goods is not higher than foundry goods homogenizing treatment temp, also to pass through solution treatment after the foundry goods welding, therefore adopt this technology to the not influence of total quality of foundry goods, but then have great importance for the welding quality that promotes foundry goods.
Embodiment 3
Present embodiment provides a kind of manufacture method that improves as cast condition K4169 superalloy welding quality, it is characterized in that: the manufacture method of described raising as cast condition K4169 superalloy welding quality, as cast condition K4169 superalloy foundry goods needs to carry out homogenizing and solution treatment and ageing treatment before welding, parameter is as follows:
Homogenizing is handled: Heating temperature is 1200 ℃; Soaking time 3 hours; The type of cooling is equivalent to the cooling of air cooling speed for filling protective gas;
Solution treatment: Heating temperature is 1000 ℃; Soaking time is 1 hour; The type of cooling is chilled to 760 ℃ with 600 ℃/h stove, air cooling for filling protective gas;
Ageing treatment: 720 ℃ of Heating temperatures; Soaking time 8 hours; The type of cooling is chilled to 630 ℃ for filling protective gas with 60 ℃ of/hour speed stoves, is incubated 8 hours, air cooling;
After foundry goods was handled through homogenizing, weave construction was hexahedral centroid structure austenite structure, and the phenomenon of component segregation reduces, and the harmful item parts in the composition is added in the matrix, and it is even that global tissue is tending towards; Foundry goods is through after the solution treatment, and performance is further promoted; Ageing treatment is to carry out after foundry goods processing, and purpose is the use properties that further promotes alloy by the precipitated phase of superalloy.
By as cast condition K4169 superalloy rejected region is adopted local heat treatment, the mode of cooling off is fast then improved the as-cast structure of rejected region, thereby has promoted the welding quality of rejected region.Because the local heating temperature of foundry goods is not higher than foundry goods homogenizing treatment temp, also to pass through solution treatment after the foundry goods welding, therefore adopt this technology to the not influence of total quality of foundry goods, but then have great importance for the welding quality that promotes foundry goods.
Claims (3)
1. manufacture method that improves as cast condition K4169 superalloy welding quality, it is characterized in that: the manufacture method of described raising as cast condition K4169 superalloy welding quality, as cast condition K4169 superalloy foundry goods needs to carry out homogenizing and solution treatment and ageing treatment before welding, parameter is as follows:
Homogenizing is handled: Heating temperature is 1000～1200 ℃; Soaking time 0.5～3 hour; The type of cooling is equivalent to the cooling of air cooling speed for filling protective gas;
Solution treatment: Heating temperature is 950～1000 ℃; Soaking time is 1 hour; The type of cooling is chilled to 750～760 ℃ with 400-600 ℃/h stove, air cooling for filling protective gas;
Ageing treatment: 720 ℃ of Heating temperatures; Soaking time 8 hours; The type of cooling is chilled to 610～630 ℃ for filling protective gas with 40-60 ℃ of/hour speed stove, is incubated 8 hours, air cooling;
After foundry goods was handled through homogenizing, weave construction was hexahedral centroid structure austenite structure, and the phenomenon of component segregation reduces, and the harmful item parts in the composition is added in the matrix, and it is even that global tissue is tending towards; Foundry goods is through after the solution treatment, and performance is further promoted; Ageing treatment is to carry out after foundry goods processing, and purpose is the use properties that further promotes alloy by the precipitated phase of superalloy.
2. according to the manufacture method of the described raising as cast condition of claim 1 K4169 superalloy welding quality, it is characterized in that: described homogenizing is handled: Heating temperature is 1095 ℃.
3. according to the manufacture method of the described raising as cast condition of claim 1 K4169 superalloy welding quality, it is characterized in that: described solution treatment: Heating temperature is 955 ℃.
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Cited By (5)
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| CN103614678A (en) * | 2013-11-18 | 2014-03-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for solving ellipse deformation of K4169 high-temperature alloy large thin-walled annular casting |
| CN105925849A (en) * | 2016-05-04 | 2016-09-07 | 中国第重型机械股份公司 | Control method for nickel-based alloy forgings for 700-DEG C ultra-supercritical steam turbine rotor |
| CN106425021A (en) * | 2016-05-13 | 2017-02-22 | 上海万泽精密铸造有限公司 | Welding repair process suitable for cast nickel-base superalloy casting |
| CN107604278A (en) * | 2017-10-11 | 2018-01-19 | 南通聚星铸锻有限公司 | A kind of technique for controlling high temperature alloy product heat treatment cooling velocity |
| WO2018188398A1 (en) * | 2017-04-13 | 2018-10-18 | 中国石油大学(华东) | Nickel-based material brazing joint component and method for use in mechanical property homogenization |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614678A (en) * | 2013-11-18 | 2014-03-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for solving ellipse deformation of K4169 high-temperature alloy large thin-walled annular casting |
| CN103614678B (en) * | 2013-11-18 | 2015-05-27 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for solving ellipse deformation of K4169 high-temperature alloy large thin-walled annular casting |
| CN105925849A (en) * | 2016-05-04 | 2016-09-07 | 中国第重型机械股份公司 | Control method for nickel-based alloy forgings for 700-DEG C ultra-supercritical steam turbine rotor |
| CN106425021A (en) * | 2016-05-13 | 2017-02-22 | 上海万泽精密铸造有限公司 | Welding repair process suitable for cast nickel-base superalloy casting |
| WO2018188398A1 (en) * | 2017-04-13 | 2018-10-18 | 中国石油大学(华东) | Nickel-based material brazing joint component and method for use in mechanical property homogenization |
| US10858724B2 (en) | 2017-04-13 | 2020-12-08 | China University Of Petroleum (East China) | Method for homogenizing the compositions and mechanical performances of nickel-based material brazed joints |
| CN107604278A (en) * | 2017-10-11 | 2018-01-19 | 南通聚星铸锻有限公司 | A kind of technique for controlling high temperature alloy product heat treatment cooling velocity |
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Application publication date: 20130904 |