CN104801645B - Forging method for high-temperature alloy GH3617M forged pieces - Google Patents
Forging method for high-temperature alloy GH3617M forged pieces Download PDFInfo
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Abstract
The invention relates to a forging method for high-temperature alloy GH3617M forged pieces. According to the forging method, by heating and heat-insulating processes of three stages, the internal and external temperature of a cast ingot can be uniform through staged heating, temperature difference is reduced, and crystal grains are prevented from being coarse and bulky; the grain size of the forged pieces obtained by using the method provided by the invention is not coarser than a level 4, and coarse and fine inclusions of the forged pieces do not exceed a level 2; through three forging stages, after solution annealing, the forged pieces have the characteristics that the room-temperature yield property is not lower than 320Mpa, the room-temperature tensile property is 700-980Mpa, the elongation percentage is not lower than 35%, the end face shrinkage ratio is not lower than 35%, the impact property is not lower than 120J, the hardness HBW is 200-250, the high-temperature instantaneous mechanical properties and high-temperature endurance strength are greatly improved, and thus, the use requirements of a gas turbine are effectively met.
Description
Technical field
The present invention relates to forging field, more particularly, to a kind of forging method of gh3617m high temperature alloy forging.
Background technology
Gh3617m is a kind of ageing strengthening type ni-base wrought superalloy of high-alloying, is usually used in manufacturing gas turbine,
Gas turbine is a kind of advanced complicated cooler power plant equipment, is typical new and high technology intensive product, for a long time
China is under one's control in the key technology of gas turbine, and current gas turbine forging generally adopts ingot casting in casting process
In forging to delivery gauge after direct drawing out, lead to crystallite dimension because ingot casting exists after a large amount of as cast condition arborescent structures and homogenization
Excessive the problems such as (include shrinkage cavity, loose), after so pulling out ingot casting, grain size is unable to reach requirement, so that after being unfavorable for
Continuous cogging forging and molding, bulk deformation is not enough, and forging crystallite dimension cannot meet, and room-temperature mechanical property is relatively low, simultaneously high temperature wink
When mechanical property, creep rupture strength nor meet gas turbine using will.
Content of the invention
The applicant is directed to above-mentioned existing issue, has carried out Improvement, provides a kind of gh3617m high temperature alloy forging
Forging method, can effectively improve forging crystallite dimension using the inventive method, and its grain size is not coarser than 4 grades, the thick system of forging and
It is carefully that field trash is less than 2 grades, effectively completely organize the use demand of gas turbine.
The technical solution adopted in the present invention is as follows:
A kind of forging method of gh3617m high temperature alloy forging, comprises the following steps:
The first step: the first heating period: ingot casting is put into and is warming up to 850～900 DEG C after heating furnace, be incubated 5～6h；
Second step: the second heating period: first step gained ingot casting is placed again in heating furnace being warming up to 1160～1180
DEG C, it is incubated 2～3h；
3rd step: forge for the first time: second step gained ingot casting is carried out first time jumping-up, then by after first time jumping-up
Ingot casting carries out pulling out for the first time and chamfered edge is to desired size；
4th step: forge for second: the ingot casting after the 3rd step pulling is carried out second jumping-up, then by second jumping-up
Ingot casting afterwards carry out second pulling and round as a ball to desired size；
5th step: the 4th step gained ingot casting rapid water is cooled to room temperature；
6th step: by the rising head of the 5th step gained ingot casting and mouth of a river excision；
7th step: excise the test piece of 19～20mm respectively at the two ends of the 6th step gained ingot casting and check that grain size satisfaction will
Ask；
8th step: the 3rd heating period: the 7th step gained ingot casting is put into and after heating furnace, is warming up to 850～900 DEG C, insulation
5～6h, then by heating after ingot casting be placed again in heating furnace being warming up to 1160～1180 DEG C, insulation 2～3h after forge to
Final size.
Its further technical scheme is:
First time forging with second forging process in, when ingot casting final forging temperature be less than 900～950 DEG C when, need by
Ingot casting is placed in insulation 2～3h in heating furnace；
Not higher than 300 DEG C of temperature before heating furnace put in the first heating period by described ingot casting；
Deflection when described ingot casting took out from heating furnace when three heating periods is not less than 25%.
Beneficial effects of the present invention are as follows:
The inventive method passes through heating and the insulating process of three phases, can make ingot casting internal and external temperature by heating stage by stage
Uniformly, reduce the temperature difference, prevent energy thick, be not coarser than 4 grades using the grain size of the inventive method gained forging, the thick system of forging
It is carefully that field trash is less than 2 grades, room temperature yield after three forging stages make the solution annealing after forging solution annealing
Energy >=320mpa, room temperature tensile performance 700～980mpa, elongation percentage >=35%, end face shrinkage factor >=35%, impact property >=
120j, hardness hbw200～250, its high-temperature instantaneous mechanical property, creep rupture strength greatly improve, and effectively meet gas turbine
Use requirement.
Brief description
Fig. 1 is the forging technology flow chart of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described.
Embodiment 1:
As shown in figure 1, the first step: the first heating period: choose not higher than 300 DEG C of temperature, weight is the ingot casting of 2000kg
Put into heating furnace, be warming up to 850 DEG C by power, be incubated 6h.
Second step: the second heating period: the ingot casting that first step gained temperature is 850 DEG C is placed again in heating furnace, presses
Power is warming up to 1180 DEG C, is incubated 2h.
3rd step: forge for the first time: second step gained temperature is high for 1180 DEG C, a size of φ 500*1220mm(diameter *
Degree) ingot casting hold up and carry out first time jumping-up to φ 660*700(diameter * height), as shown in a, b schematic diagram in Fig. 1,
Then the ingot casting after first time jumping-up is carried out pulling out (as shown in c figure in Fig. 1) for the first time and chamfered edge is to 450*1170(length and width *
High).
4th step: forge for second: as shown in d figure in Fig. 1, the ingot casting after the 3rd step pulling is carried out second jumping-up extremely
620*615(length and width * are high), as shown in e figure in Fig. 1, then the ingot casting after second jumping-up is carried out second pulling round as a ball
To φ 430*1600(diameter * height).
5th step: the 4th step gained ingot casting rapid water is cooled to room temperature.
6th step: by the rising head of the 5th step gained ingot casting and mouth of a river excision.
7th step: excise the test piece of 19～20mm at the two ends of the 6th step gained ingot casting respectively, heating furnace is put in test piece
In be warming up to 1150 DEG C after quick water-cooled, then center of circle detection grain size, examination at the edge of two panels test piece, 1/2 radius respectively
Piece grain size >=4 grade just can enter the 8th step operation, if test piece is not reaching to 4 grades, needs for forging to return to the 4th step and change
Forging, until grain size completely organizes requirement.
8th step: the 3rd heating period: the 7th step gained ingot casting is put into and after heating furnace, is warming up to 850～900 DEG C, insulation
5～6h, then by heating after ingot casting be placed again in heating furnace being warming up to 1160～1180 DEG C, insulation 2～3h after forge to
Final size.
In the forging of above-mentioned first time with second forging process, when ingot casting final forging temperature is less than 900～950 DEG C, need
Ingot casting is placed in insulation 2～3h in heating furnace.The deflection when taking out from heating furnace the 3rd heating period for the ingot casting is more than
25%.
Can be met claimed below using the forging that the inventive method obtains:
The grain size of forging is not coarser than 4 grades, the thick system of forging and be carefully that field trash is less than 2 grades, room temperature after solution annealing
Yield behavior >=320mpa, room temperature tensile performance 700～980mpa, elongation percentage >=35%, end face shrinkage factor >=35%, impact property
>=120j, hardness hbw200～250.
The high-temperature instantaneous mechanical property of forging is as shown in table 1 below:
The creep rupture strength of forging is as shown in table 2 below:
Above description is explanation of the invention, is not the restriction to invention, limited range of the present invention is referring to right
Require, in the case of the basic structure without prejudice to the present invention, the present invention can make any type of modification.
Claims (4)
1. a kind of forging method of gh3617m high temperature alloy forging is it is characterised in that comprise the following steps:
The first step: the first heating period: ingot casting is put into and is warming up to 850～900 DEG C after heating furnace, be incubated 5～6h；
Second step: the second heating period: first step gained ingot casting is placed again in heating furnace being warming up to 1160～1180 DEG C, protects
Warm 2～3h；
3rd step: forge for the first time: second step gained ingot casting is carried out first time jumping-up, then by the ingot casting after first time jumping-up
Carry out pulling out for the first time and chamfered edge is to desired size；
4th step: forge for second: the ingot casting after the 3rd step pulling is carried out second jumping-up, then by after second jumping-up
Ingot casting carry out second pulling and round as a ball to desired size；
5th step: the 4th step gained ingot casting rapid water is cooled to room temperature；
6th step: by the rising head of the 5th step gained ingot casting and mouth of a river excision；
7th step: excise the test piece of 19～20mm respectively at the two ends of the 6th step gained ingot casting and check that grain size meets requirement,
If test piece grain size >=4 grade enter the 8th step operation, if test piece is not reaching to 4 grades, need for forging to return to the 4th step,
Until grain size meets requiring；
8th step: the 3rd heating period: the 7th step gained ingot casting is put into and after heating furnace, is warming up to 850～900 DEG C, insulation 5～
Then ingot casting after heating is placed again in heating furnace being warming up to 1160～1180 DEG C by 6h, forges to final after insulation 2～3h
Size.
2. as claimed in claim 1 a kind of forging method of gh3617m high temperature alloy forging it is characterised in that: for the first time
In forging and second forging process, when ingot casting final forging temperature is less than 900～950 DEG C, need ingot casting is placed in heating furnace
Insulation 2～3h.
3. as claimed in claim 1 a kind of forging method of gh3617m high temperature alloy forging it is characterised in that: described ingot casting
Not higher than 300 DEG C of temperature before heating furnace is put in the first heating period.
4. as claimed in claim 1 a kind of forging method of gh3617m high temperature alloy forging it is characterised in that: described ingot casting
Deflection when taking out from heating furnace when three heating periods is not less than 25%.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105331912B (en) * | 2015-11-27 | 2017-10-03 | 西部超导材料科技股份有限公司 | A kind of GH4169 high temperature alloys bar and preparation method thereof |
| CN105648373B (en) * | 2016-04-08 | 2018-04-27 | 中国第一重型机械股份公司 | 700 DEG C of 617 nickel-base alloy rotor forgings of extra-supercritical unit forge crystal grain control method |
| CN107838343A (en) * | 2016-12-01 | 2018-03-27 | 贵州安大航空锻造有限责任公司 | Titanium alloy rustless steel double-metal ring parts rolling forming method |
| CN110373620B (en) * | 2019-09-03 | 2020-11-03 | 钢铁研究总院 | Method for improving hot working performance of high gamma' phase volume fraction nickel-based precipitation strengthening type superalloy |
| CN110747418B (en) * | 2019-12-05 | 2020-11-24 | 北京钢研高纳科技股份有限公司 | GH4738 alloy, homogenizing method thereof, turbine disc forging and gas turbine |
| CN111235503A (en) * | 2020-02-27 | 2020-06-05 | 无锡派克新材料科技股份有限公司 | Quality improvement and material saving method for nickel-based coarse-grained high-temperature alloy |
| CN111230015A (en) * | 2020-02-27 | 2020-06-05 | 无锡派克新材料科技股份有限公司 | High-temperature alloy grain refinement method |
| CN111659894B (en) * | 2020-06-19 | 2022-06-21 | 北京钢研高纳科技股份有限公司 | Preparation method of powder high-temperature alloy bar and disc |
| CN114378234B (en) * | 2021-09-07 | 2023-11-03 | 江西宝顺昌特种合金制造有限公司 | NS3303 corrosion-resistant alloy and forging method thereof |
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| JPS5877526A (en) * | 1981-10-31 | 1983-05-10 | Sumitomo Metal Ind Ltd | Production of unnormalized high-strength forging |
| CN1058757C (en) * | 1996-05-09 | 2000-11-22 | 沈阳黎明发动机制造公司 | Method for nickel-base high-temp. alloy forging and bar acquiring uniform superfine crystalline grain |
| CN1435287A (en) * | 2002-01-29 | 2003-08-13 | 贵州安大航空锻造有限责任公司 | Process for whole forging large long-shaft high-temp. alloy forge piece |
| CN100500881C (en) * | 2007-03-05 | 2009-06-17 | 贵州安大航空锻造有限责任公司 | Process of making ring fine crystal blank of GH4169 alloy for near constant temperature forging |
| CN102357633B (en) * | 2011-09-27 | 2013-11-06 | 上海宏钢电站设备铸锻有限公司 | Method for manufacturing nickel-based high-temperature alloy forge piece |
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