CN101311277A - Homogenization treatment process for high-temperature alloyed steel ingot - Google Patents
Homogenization treatment process for high-temperature alloyed steel ingot Download PDFInfo
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- CN101311277A CN101311277A CNA2007100229167A CN200710022916A CN101311277A CN 101311277 A CN101311277 A CN 101311277A CN A2007100229167 A CNA2007100229167 A CN A2007100229167A CN 200710022916 A CN200710022916 A CN 200710022916A CN 101311277 A CN101311277 A CN 101311277A
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Abstract
A homogenizing treatment method for high-temperature alloy ingots is annealing treatment in an annealing furnace. The method is characterized in that the temperature of the annealing treatment is between the temperature of 1180 to 1230 DEG C and the annealing lasts for twenty hours. The method of the invention adopts the technical proposal, so the method can effectively solve the problem of segregation between the phase Laves and the phase delta and improves the alloy segregation degree to the utmost extent.
Description
Technical field
The present invention relates to a kind of superalloy complete processing, especially a kind of homogenization treatment process for high-temperature alloyed steel ingot.
Background technology
The GH169 superalloy, be that a kind of niobium that contains reaches 5% iron nickel base alloy, because its composition characteristics, just determined the macrosegregation of this alloying element, the particularly segregation of Nb, and the restriction of speed of cooling, cause must form in the cooled as-cast structure of steel ingot Laves mutually with δ mutually, and the existence of Laves phase has caused the inductile of steel ingot in the alloy.Domestic at this research, and obtained certain achievement, as ingot shape, adopted 1120 ℃ * 24 hours or 1150 ℃ * 15 hours even processing for Φ 360, but basically eliminate Laves phase.Though eliminated the Laves phase, yet the alternate crystal grain band of quite serious thickness occurred, in the thin crystal zone δ of place phase dense distribution.In recent years, along with the development that aerospace brings, material is had higher requirement, particularly the heavy forging that the ingot shape of Φ more than 360 produced not only explicitly calls for the existence that does not allow the Laves phase, and requires homogeneous microstructure, and especially δ is evenly distributed mutually.
Summary of the invention
At above deficiency, the invention provides a kind of homogenization treatment process for high-temperature alloyed steel ingot, can effectively solve Laves phase and δ segregation problem mutually, improve alloy segregation degree to greatest extent.
In order to reach above purpose, the present invention by the following technical solutions, a kind of homogenization treatment process for high-temperature alloyed steel ingot promptly carries out anneal in annealing furnace, the temperature that it is characterized in that described anneal is the 1180-1230 degree, annealing time is 15-20 hour.
Because the present invention adopts above technical scheme, can effectively solve Laves phase and δ segregation problem mutually, improve alloy segregation degree to greatest extent.
Embodiment
The invention will be further described below in conjunction with embodiment
Embodiment 1
The GH169 superalloy is made and comprised following process, raw-material preparation, and--------esr becomes ingot shape Φ 300/320 or Φ 360/380 steel ingot, and--the steel ingot homogenizing is handled, and--hammer cogging becomes garden rod or square billet--UT (Ultrasonic Testing) check--puts in storage casting Φ 220 electrodes vacuum induction melting in the electrode surface grinding.
For the segregation problem that effectively solves, the present invention adopts following treatment process when making the GH169 alloyed steel ingot:
A) starting material are prepared:
A-1: raw material ratio (mass percent)
| Alloy designations | C | Cr | Co | Ni | Mo | Al | Ti | Nb |
| GH169 | 0.08 | 17 | 1.0 | 55 | 3.3 | 0.6 | 0.65 | 5.0 |
| Alloy designations | Cu | S | B | P | Fe | Si | Mn | Ng |
| GH169 | 0.30 | 0.015 | 0.006 | 0.015 | Surplus | 0.35 | 0.35 | 0.01 |
A-2: starting material clean, and cleaning way is, soak 8 (or 10,12) minute in 5% NaOH washing lotion, then with washing in the clear water.
B) vacuum induction melting--
Less than 1.0Pa, unloaded leak rate is less than 0.11Pa/ minute in vacuum tightness for the 500Kg vacuum induction furnace, melting under the normal temperature state.
C) casting Φ 220 electrodes--in the vacuum mold chamber of vacuum oven, pour into a mould
D) electrode surface grinds--
The purpose that electrode surface grinds is in order to remove the oxide compound of electrode surface, with the polishing of self-control grinding machine.Voltage 380V, 4 motors, every 11KW
E) esr becomes ingot shape Φ 360/380 steel ingot:
| The switch gear | Crystallizer | Secondary voltage (V) | Open circuit voltage (V) | Auxiliary electrode | The quantity of slag (Kg) |
| 5 | Φ360/380 | 55 | 51 | Φ220 | 42 |
F) the steel ingot homogenizing is handled--
Homogenizing is handled the operating voltage 380V of electric furnace in 6 meters annealing furnaces, power 280KW (concrete processing mode and data see Table).
G) hammer cogging becomes garden rod or square billet
H) UT (Ultrasonic Testing) check
I) warehouse-in
Setting and representing the value of segregation degree is K, and main element (Nb and Ti) segregation is carried out even processing and result of a sample test data such as following table one to steel ingot:
Table one: homogenizing processing mode and segregation data sheet
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.
Claims (2)
1, a kind of homogenization treatment process for high-temperature alloyed steel ingot promptly carries out anneal in annealing furnace, the temperature that it is characterized in that described anneal is the 1180-1230 degree, and annealing time is 15-20 hour.
2, homogenization treatment process for high-temperature alloyed steel ingot according to claim 1 is characterized in that: the temperature of described anneal is the 1190-1210 degree, and annealing time is 15-20 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100229167A CN101311277A (en) | 2007-05-25 | 2007-05-25 | Homogenization treatment process for high-temperature alloyed steel ingot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100229167A CN101311277A (en) | 2007-05-25 | 2007-05-25 | Homogenization treatment process for high-temperature alloyed steel ingot |
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| CN101311277A true CN101311277A (en) | 2008-11-26 |
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| CNA2007100229167A Pending CN101311277A (en) | 2007-05-25 | 2007-05-25 | Homogenization treatment process for high-temperature alloyed steel ingot |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014523A (en) * | 2013-01-22 | 2013-04-03 | 宁夏东方钽业股份有限公司 | Base material for high-temperature alloy and method for manufacturing base material |
| CN103234989A (en) * | 2013-04-18 | 2013-08-07 | 武汉大学 | Method for determining Laves phase content in steel |
| CN103276333A (en) * | 2013-06-07 | 2013-09-04 | 北京科技大学 | GH4738 nickel base superalloy casting ingot homogenization treatment method |
| CN111719039A (en) * | 2019-03-22 | 2020-09-29 | 上海电气电站设备有限公司 | FeCoNiAlNb high-temperature alloy homogenization treatment method |
| CN111809128A (en) * | 2020-06-06 | 2020-10-23 | 北京钢研高纳科技股份有限公司 | Method for rapidly dissolving and deforming Laves phase in high-temperature alloy ingot by pulse current |
-
2007
- 2007-05-25 CN CNA2007100229167A patent/CN101311277A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014523A (en) * | 2013-01-22 | 2013-04-03 | 宁夏东方钽业股份有限公司 | Base material for high-temperature alloy and method for manufacturing base material |
| US9309584B2 (en) | 2013-01-22 | 2016-04-12 | Ningxia Orient Tantalum Industry Co., Ltd. | Base material for high temperature alloy and manufacture method thereof |
| CN103234989A (en) * | 2013-04-18 | 2013-08-07 | 武汉大学 | Method for determining Laves phase content in steel |
| CN103276333A (en) * | 2013-06-07 | 2013-09-04 | 北京科技大学 | GH4738 nickel base superalloy casting ingot homogenization treatment method |
| CN103276333B (en) * | 2013-06-07 | 2015-07-22 | 中国石油天然气集团公司 | GH4738 nickel base superalloy casting ingot homogenization treatment method |
| CN111719039A (en) * | 2019-03-22 | 2020-09-29 | 上海电气电站设备有限公司 | FeCoNiAlNb high-temperature alloy homogenization treatment method |
| CN111809128A (en) * | 2020-06-06 | 2020-10-23 | 北京钢研高纳科技股份有限公司 | Method for rapidly dissolving and deforming Laves phase in high-temperature alloy ingot by pulse current |
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Open date: 20081126 |