CN103586391A - Extrusion forming method for blade made of GH2787 high-temperature alloy - Google Patents
Extrusion forming method for blade made of GH2787 high-temperature alloy Download PDFInfo
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- CN103586391A CN103586391A CN201310563941.1A CN201310563941A CN103586391A CN 103586391 A CN103586391 A CN 103586391A CN 201310563941 A CN201310563941 A CN 201310563941A CN 103586391 A CN103586391 A CN 103586391A
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Abstract
The invention discloses an extrusion forming method for a blade made of GH2787 high-temperature alloy. The extrusion forming method comprises the first step of heating a billet electric furnace to 1000-1050+/-10 DEG C, keeping the temperature for 3 minutes and performing direct extrusion forming on the blade, wherein according to the deformation amount of the blade, the head of the blade is 20%-30%, and the extrusion ratio of the body of the blade is 5-7; the second step of clearing the surface of a forge piece in a grit-blasting mode, the third step of performing vibrating finishing, clearing the surface of the forge piece and improving the roughness and light integrity of the surface of the forge piece, and the fourth step of performing solution treatment and aging treatment on the forge piece, wherein the temperature of the solution treatment is 940+/-10 DEG C and is kept for 1-2 hours, then air cooling is performed on the forge piece, the temperature of the aging treatment is 780+/-10 DEG C and is kept for 16 hours, and finally air cooling is performed on the forge piece. Compared with a traditional precision forging forming technology, the extrusion forming method has the advantages that four sets of tool design and manufacture are saved, the costs of the tool manufacture are saved by close to RMB 80,000 yuan, and meanwhile the preparation time of the blade is shortened; due to the facts that the forge piece of the blade is designed by adopting the method of adding allowance in equal proportion, and the allowance for machining the single surface of the blade is only 0.3+/-0.2mm, the use rate of the material is enhanced.
Description
Technical field
The present invention relates to high-temperature alloy blades precision forging technical field, is a kind of process of blade extrusion molding specifically.
Background technology
Material is that the feature of the high-temperature alloy forging blade of GH2787 is that large listrium, blade profile are thin, front and rear edge thickness is little, the alloying level of blade material is high, in addition the subsequent handling of blade accessory processing is cold roll milling technology, to the allowance of forging, dimensional accuracy and table and quality requirement is all very high, these factors have all increased the difficulty that blade forging is shaped, so blade forging is shaped to adopt new technology, could meet the needs that blade is shaped.According to grasped data, state's intra vane is all to adopt the first base technical process of forging and molding again, and frock quantity is many, and the manufacturing cycle is long, and cost is high.
Summary of the invention
For solving the problems of the technologies described above, the object of the invention is to test by important parameters such as alloy forging molding technology and Forge Heating parameter, deflections, determined advanced technologies route and the one group of technological parameter that can realize direct extrusion modling; By mould design and manufacture and detection means, guarantee blade profile degree of precision simultaneously, realized high-temperature alloy blades finish forge.Concrete technical scheme is as follows:
Be a high-temperature alloy blades extrusion forming method of GH2787, comprise the following steps:
(1) blank shape adopts plate, for being conducive to metal flow at the side of blank rounding;
(2) blank blast rear surface applies lubricant;
(3) by blank heating by electric cooker to 1000-1050 ℃ ± 10 ℃, insulation 3min; Direct extrusion molding on high energy rate forging hammer, deflection: head 20% one 30%, blade extrusion ratio is 5-7;
(4) in extrusion process, to mould surface spraying colloidal graphite mixed with water; In high energy rate forging hammer extrusion process, due to the impact of fuel factor, can make part temperature rising 50-70 ℃, consider that extruding blade blank is little, the temperature drop of coming out of the stove is very fast, and 20-30 ℃ generally raises, therefore, push blade on high energy rate forging hammer, the heating turbidity of blank is than the low 30-40 ℃ of traditional die forging temperature.
(5) cleaning, blast cleaning forging surface;
(6) vibration finishing, cleaning forging surface, improves roughness and the polishing on forging surface;
(7) heat treatment, forging carries out solid solution and adds Ageing Treatment, and solid solubility temperature is 940 ℃ ± 10 ℃, insulation 1h mono-2h, air cooling, aging temp is 780 ℃ ± 10 ℃, insulation 16h, air cooling.
In described step (1), the side of described blank (intersection that refers to three faces) rounding SR3-SR5.
The lubricant Main Ingredients and Appearance of described step (2) is by weight: glass lubricant 57%, and china clay 3%, industrial metasilicate 5%, 1), ball milling surplus is water, process for preparation:, glass lubricant and china clay are carried out to ball milling, the time is no less than 12 hours; 2), filter, with 200 mesh sieve, filter the lubricant of milled; 3) adjust concentration, water regulates concentration; 4) add industrial metasilicate to stir; Described lubricant also can adopt the product of ，Ru Beijing, commercially available prod Shou Liang scientific & technical corporation.
Described in described step (4), the compound method of colloidal graphite mixed with water is by weight: forge aquadag and add pure water, in 1:6 ratio, stir, the lubricant of mixing is put into fluid reservoir, pressurization 0.25-0.3MPa.
Advantage of the present invention is: 1) adopt lubricant provided by the invention and colloidal graphite mixed with water, the present invention compares with traditional Near Shape Forging Technology, not only saves 4 cover Fixture Design and manufactures, saves frock manufacturing expense, has shortened the lead time of blade simultaneously.2) blade forging design adopts equal proportion to place the method for surplus, and single-sided process surplus only has 0.3mm ± 0, and 2mm has improved the utilization rate of material.
Accompanying drawing explanation
Fig. 1 is the structural representation of extrusion die;
Fig. 2 is the top view of Fig. 1;
In figure, 1 is drift, and 2 is former.
The specific embodiment
Technical scheme of the present invention comprises following part;
1) forging heating technique: high temperature alloy is in heating process repeatedly, and the easily ablated and dilution of the alloying elements such as the carbon on forging top layer, boron, even brings out the alligatoring of forging surface layer grain, causes drawing secondary plasticity and impact toughness decreased, and high-temperature and durable obviously reduces.Want to obtain desirable structure property, simultaneously finish forge blade will strictly be controlled because of the less effects on surface oxidation of surplus and element dilution, must study the heating cycle of forging.By a large amount of engineer testings, determine and adopt heating by electric cooker, in high energy rate forging hammer extrusion process, produce fuel factor, make part temperature rising 50-70 ℃, consider that extruding blade blank is little, the temperature drop of coming out of the stove is very fast, the 20-30 ℃ that generally raises, therefore, on high energy rate forging hammer, push blade, the heating-up temperature of blank is than the low 30-40 ℃ of traditional die forging temperature.
Blade forging removing surface, optimisation technique: in order to obtain finish forge blade, each of forging forming is manufactured link to be needed to control, and the defect occurring is cleared up, and carries out surface corrosion and vibration finishing intensive treatment simultaneously.
Blade forging design adopts equal proportion to place the method for surplus, and single-sided process surplus only has 0.3mm ± 0, and 2mm has improved the utilization rate of material, and single-piece blade forging is saved material consumption 0-5 kilogram.
Blade precision forging process process route and smithing technological parameter have been determined, having optimized distortion heating-up temperature is 1000-1050 ℃ ± 10 ℃, the combination property of forging is even more ideal, mirco structure is equiax crystal, by the deformation temperature that blade forging is shaped, the control of deflection, and the Technology for Heating Processing scheme matching with it solves optimization and the structural homogenity problem of leaf tissue, performance.
The main forming step of blade and technological parameter:
(1) blank shape adopts plate, for being conducive to metal flow at the side of blank rounding;
(2) blank blast rear surface applies lubricant;
(3) by 1000-1050 ℃ ± 10 ℃ of blank heating by electric cookers, insulation 3min; Direct extrusion molding on high energy rate forging hammer, deflection: head 20% one 30%, blade extrusion ratio is 5-7; (4) in extrusion process, to mould surface spraying colloidal graphite mixed with water; In high energy rate forging hammer extrusion process, due to the impact of fuel factor, can make part temperature rising 50-70 ℃, consider that extruding blade blank is little, the temperature drop of coming out of the stove is very fast, and 20-30 ℃ generally raises, therefore, push blade on high energy rate forging hammer, the heating-up temperature of blank is than the low 30-40 ℃ of traditional die forging temperature.
(5) cleaning, blast cleaning forging surface;
(6) vibration finishing, cleaning forging surface, improves roughness and the polishing on forging surface;
(7) heat treatment, forging carries out solid solution and adds Ageing Treatment, and solid solubility temperature is 940 ℃ ± 10 ℃, insulation 1h mono-2h, air cooling, aging temp is 780 ℃ ± 10 ℃, insulation 16h, air cooling.
In described step (1), the side rounding SR3-SR5 of described blank.The lubricant Main Ingredients and Appearance of described step (2) is by weight: glass lubricant 57%, and china clay 3%, industrial metasilicate 5%, 1), ball milling surplus is water, process for preparation:, glass lubricant and china clay are carried out to ball milling, the time is no less than 12 hours; 2), filter, with 200 mesh sieve, filter the lubricant of milled; 3) adjust concentration, water regulates concentration; 4) add industrial metasilicate to stir; Described lubricant also can adopt the product of ，Ru Beijing, commercially available prod Shou Liang scientific & technical corporation.
Described in described step (4), the compound method of colloidal graphite mixed with water is by weight: make aquadag and add pure water, in 1:6 ratio, stir, the lubricant of mixing is put into fluid reservoir, pressurization 0.25-0.3MPa.
The present invention compared with the prior art, has optimized technological process:
Stainless steel, titanium being closed to the extensive flow process adopting of box blade both at home and abroad is at present: cylindrical blank, and---extrusion modling cylinder blade------------------trimming is paid the square tenon of pier nose moulding in mould correction for whole shaping tenon and blade for preformed tenon and blade by heat treatment---physics and chemistry detection---eventually inspection.
Fine forge piece technological process of the present invention is: flatten blank, and---directly extrusion modling blade------pay in cleaning by heat treatment---physics and chemistry detection---eventually inspection.The present invention is owing to adopting foregoing moulding technique, " extrusion modling cylinder blade---the square tenon of pier nose moulding---preformed tenon and blade---whole shaping tenon and blade---trimming " five processes is merged into " directly extrusion modling blade " procedure, therefore shortened flow process, also reduce quadruplet frock, reduced material consumption simultaneously.
Extrusion die design: mould forms (seeing circle 1) by former 2 and drift 1, and former adopts high-abrasive material 4Cr5W2VSi, and drift material is W18Cr4V.The forging of extrusion modling is without burr, and the burr mill of datum level is clean, and it is qualified that upper measuring tool detects.
Claims (4)
1. the high-temperature alloy blades extrusion forming method that material is GH2787, is characterized in that comprising the following steps:
(1) blank shape adopts plate, for being conducive to metal flow at the side of blank rounding;
(2) blank blast rear surface applies lubricant;
(3) by blank heating by electric cooker to 1000-1050 ℃ ± 10 ℃, insulation 3min; Direct extrusion molding on high energy rate forging hammer, deflection: head 20% one 30%, blade extrusion ratio is 5-7;
(4) in extrusion process, to mould surface spraying colloidal graphite mixed with water;
(5) cleaning, blast cleaning forging surface;
(6) vibration finishing, cleaning forging surface, improves roughness and the polishing on forging surface;
(7) heat treatment, forging carries out solid solution and adds Ageing Treatment, and solid solubility temperature is 940 ℃ ± 10 ℃, insulation 1h mono-2h, air cooling, aging temp is 780 ℃ ± 10 ℃, insulation 16h, air cooling.
2. high-temperature alloy blades extrusion forming method according to claim 1, is characterized in that: in described step (1), and the side rounding SR3-SR5 of described blank.
3. high-temperature alloy blades extrusion forming method according to claim 1, it is characterized in that: the lubricant Main Ingredients and Appearance of described step (2) by weight: glass lubricant 57%, china clay 3%, industrial metasilicate 5%, surplus is water, 1), ball milling process for preparation:, glass lubricant and china clay are carried out to ball milling, the time is no less than 12 hours; 2), filter, with 200 mesh sieve, filter the lubricant of milled; 3) adjust concentration, water regulates concentration; 4) add industrial metasilicate to stir.
4. high-temperature alloy blades extrusion forming method according to claim 1, it is characterized in that: described in described step (4), the compound method of colloidal graphite mixed with water is by weight: forge aquadag and add pure water, in 1:6 ratio, stir, the lubricant of mixing is put into fluid reservoir, pressurization 0.25-0.3MPa.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104741873A (en) * | 2015-01-30 | 2015-07-01 | 深圳市江为五金螺丝有限公司 | Numerical control extrusion process |
| CN105195541A (en) * | 2015-10-13 | 2015-12-30 | 北京科技大学 | GH4738 alloy fine-grain blank manufacturing method for supercritical power station steam turbine blade |
| CN105290285A (en) * | 2015-11-20 | 2016-02-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Manufacturing method for directly forming blade forging piece through extrusion |
| CN105441654A (en) * | 2015-11-20 | 2016-03-30 | 沈阳黎明航空发动机(集团)有限责任公司 | Precise cold-rolling manufacturing method for GH2787 alloy blade |
| CN105798214A (en) * | 2014-12-30 | 2016-07-27 | 天津重型装备工程研究有限公司 | Method for forming turbine blade through round bar multi-directional die forging |
| CN106636592A (en) * | 2016-11-07 | 2017-05-10 | 成都发动机（集团）有限公司 | Method for refining GH2787 forging grains |
| CN107363202A (en) * | 2017-06-30 | 2017-11-21 | 陕西宏远航空锻造有限责任公司 | A kind of forming method of the small surplus blade of nickel base superalloy |
| CN113414332A (en) * | 2021-06-21 | 2021-09-21 | 四川捷贝通能源科技有限公司 | Fully soluble slip tooth material and preparation method and application thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798214A (en) * | 2014-12-30 | 2016-07-27 | 天津重型装备工程研究有限公司 | Method for forming turbine blade through round bar multi-directional die forging |
| CN104741873A (en) * | 2015-01-30 | 2015-07-01 | 深圳市江为五金螺丝有限公司 | Numerical control extrusion process |
| CN105195541A (en) * | 2015-10-13 | 2015-12-30 | 北京科技大学 | GH4738 alloy fine-grain blank manufacturing method for supercritical power station steam turbine blade |
| CN105290285A (en) * | 2015-11-20 | 2016-02-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Manufacturing method for directly forming blade forging piece through extrusion |
| CN105441654A (en) * | 2015-11-20 | 2016-03-30 | 沈阳黎明航空发动机(集团)有限责任公司 | Precise cold-rolling manufacturing method for GH2787 alloy blade |
| CN106636592A (en) * | 2016-11-07 | 2017-05-10 | 成都发动机（集团）有限公司 | Method for refining GH2787 forging grains |
| CN107363202A (en) * | 2017-06-30 | 2017-11-21 | 陕西宏远航空锻造有限责任公司 | A kind of forming method of the small surplus blade of nickel base superalloy |
| CN113414332A (en) * | 2021-06-21 | 2021-09-21 | 四川捷贝通能源科技有限公司 | Fully soluble slip tooth material and preparation method and application thereof |
| CN113414332B (en) * | 2021-06-21 | 2022-05-13 | 四川捷贝通能源科技有限公司 | Fully soluble slip tooth material and preparation method and application thereof |
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| CN103586391B (en) | 2015-07-15 |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |