CN103586391B - 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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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 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 the process that a kind of blade pinches is shaped specifically.
Background technology
Material is that the feature of the high-temperature alloy forging blade of GH2787 is large listrium, blade profile is 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 all increase the difficulty that blade forging is shaped, so blade forging is shaped to adopt new technology could meet the needs of blade shaping.According to grasped data, state's intra vane is all the technical process adopting first base 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 be tested by important parameters such as alloy forging molding technology and Forge Heating parameter, deflections, determining and can realize directly extruded advanced technologies route and one group of technological parameter; Ensure that blade profile degree of precision by mould design and manufacture and detection means simultaneously, realize high-temperature alloy blades finish forge.Concrete technical scheme is as follows:
Material is a high-temperature alloy blades extrusion forming method of GH2787, comprises the following steps:
(1) blank shape adopts plate, for being conducive to the side rounding of metal flow at blank;
(2) blank blast rear surface coating lubricant;
(3) by blank heating by electric cooker to 1000-1050 DEG C, 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, Part temperature can be made to raise 50-70 DEG C, consider that extruding blade blank is little, temperature drop of coming out of the stove is very fast, general rising 20-30 DEG C, therefore, high energy rate forging hammer extrudes blade, the heating turbidity 30-40 DEG C lower than traditional die forging temperature of blank.
(5) clear up, 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 DEG C ± 10 DEG C, insulation lh mono-2h, air cooling, and aging temp is 780 DEG C ± 10 DEG C, insulation 16h, air cooling.
In described step (1), side (referring to the intersection in three faces) the rounding SR3-SR5 of described blank.
The lubricant Main Ingredients and Appearance of described step (2) is 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 ball milling, and the time is no less than 12 hours; 2), filter, filter the lubricant of milled by 200 mesh sieve; 3) degree of thickening, water use regulation concentration; 4) add industrial metasilicate to stir; Described lubricant also can adopt commercially available prod, as the product of Beijing Shou Liang scientific & technical corporation.
Described in described step (4), the compound method of colloidal graphite mixed with water is by weight: forging aquadag adds pure water, stirs, the lubricant mixed is put into fluid reservoir in 1:6 ratio, pressurization 0.25-0.3MPa.
Advantage of the present invention is: 1) adopt lubricant provided by the invention and colloidal graphite mixed with water, and the present invention, compared with traditional Near Shape Forging Technology, not only saves 4 cover Fixture Design and manufactures, saves frock manufacturing expense, shorten 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 ± 0.2mm, improves 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.
Detailed description of the invention
Technical scheme of the present invention comprises with lower part;
1) forging heating technique: high temperature alloy is in heating process repeatedly, and the alloying element easily ablated and dilution such as carbon, boron on forging top layer, even bring out the alligatoring of forging surface layer grain, cause drawing secondary plasticity and impact toughness decreased, high-temperature and durable obviously reduces.Want to obtain desirable structure property, finish forge blade will strictly control because of the less effects on surface oxidation of surplus and element dilution simultaneously, must study the heating cycle of forging.By a large amount of engineer testings, determine to adopt heating by electric cooker, due in high energy rate forging hammer extrusion process, produce fuel factor, make Part temperature raise 50-70 DEG C, consider that extruding blade blank is little, temperature drop of coming out of the stove is very fast, general rising 20-30 DEG C, therefore, high energy rate forging hammer extrudes blade, the heating-up temperature 30-40 DEG C lower than traditional die forging temperature of blank.
Blade forging removing surface, optimisation technique: in order to obtain finish forge blade, each manufacture link of forging forming needs to control, and clears up, carry out surface corrosion and vibration finishing intensive treatment simultaneously to the defect occurred.
Blade forging design adopts equal proportion to place the method for surplus, and single-sided process surplus only has 0.3mm ± 0.2mm, improves the utilization rate of material, and material consumption 0-5 kilogram saved by single piece vanes forging.
Determine blade precision forging process process route and smithing technological parameter, optimizing distortion heating-up temperature is 1000-1050 DEG C, the combination property of forging is even more ideal, mirco structure is equiax crystal, by the control of the deformation temperature that is shaped to blade forging, deflection, and the Technology for Heating Processing scheme matched with it solves leaf tissue, the optimization of performance and even tissue sex chromosome mosaicism.
The main forming step of blade and technological parameter:
(1) blank shape adopts plate, for being conducive to the side rounding of metal flow at blank;
(2) blank blast rear surface coating lubricant;
(3) by blank heating by electric cooker 1000-1050 DEG C, 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, Part temperature can be made to raise 50-70 DEG C, consider that extruding blade blank is little, temperature drop of coming out of the stove is very fast, general rising 20-30 DEG C, therefore, high energy rate forging hammer extrudes blade, the heating-up temperature 30-40 DEG C lower than traditional die forging temperature of blank.
(5) clear up, 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 DEG C ± 10 DEG C, insulation lh mono-2h, air cooling, and aging temp is 780 DEG C ± 10 DEG C, 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%, china clay 3%, industrial metasilicate 5%, surplus is water, 1), ball milling process for preparation:, glass lubricant and china clay are carried out ball milling, and the time is no less than 12 hours; 2), filter, filter the lubricant of milled by 200 mesh sieve; 3) degree of thickening, water use regulation concentration; 4) add industrial metasilicate to stir; Described lubricant also can adopt commercially available prod, as the product of Beijing 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, stirs, the lubricant mixed is put into fluid reservoir in 1:6 ratio, pressurization 0.25-0.3MPa.
The present invention compared with the prior art, optimizes technological process:
The flow process that box blade extensively adopts is closed to stainless steel, titanium be both at home and abroad at present:---------------------heat treatment---Physico-chemical tests---examines payment to trimming to the shaping square tenon of pier nose to extruded cylinder blade to cylindrical blank eventually in mould correction for whole shaping tenon and blade for preformed tenon and blade.
Fine forge piece technological process of the present invention is: flatten blank, and---------heat treatment---Physico-chemical tests---examines payment to direct extruded blade eventually in cleaning.The present invention is owing to adopting foregoing moulding technique, " extruded cylinder blade---the shaping square tenon of pier nose---preformed tenon and blade---whole shaping tenon and blade---trimming " five processes is merged into " direct extruded blade " procedure, therefore flow process is shortened, also reduce four cover frocks, reduce material consumption simultaneously.
Extrusion die designs: mould is made up of (see Fig. 1) former 2 and drift l, and former adopts high-abrasive material 4Cr5W2VSi, and drift material is W18Cr4V.Extruded forging is without burr, and by clean for the burr of datum level mill, it is qualified that upper measuring tool detects.
Claims (2)
1. material is a high-temperature alloy blades extrusion forming method of GH2787, it is characterized in that comprising the following steps:
(1) blank shape adopts plate, for being conducive to the side rounding of metal flow at blank;
(2) blank blast rear surface coating lubricant;
(3) by blank heating by electric cooker to 1000-1050 DEG C, 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) clear up, 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 DEG C ± 10 DEG C, insulation lh mono-2h, air cooling, and aging temp is 780 DEG C ± 10 DEG C, insulation 16h, air cooling;
The lubricant Main Ingredients and Appearance of described step (2) is 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 ball milling, and the time is no less than 12 hours; 2), filter, filter the lubricant of milled by 200 mesh sieve; 3) degree of thickening, water use regulation concentration; 4) add industrial metasilicate to stir.
2. 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: forging aquadag adds pure water, stir in 1:6 ratio, the lubricant mixed is put into fluid reservoir, pressurization 0.25-0.3MPa.
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| CN201310563941.1A CN103586391B (en) | 2013-11-11 | 2013-11-11 | Extrusion forming method for blade made of GH2787 high-temperature alloy |
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| CN201310563941.1A CN103586391B (en) | 2013-11-11 | 2013-11-11 | Extrusion forming method for blade made of GH2787 high-temperature alloy |
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| CN103586391B true CN103586391B (en) | 2015-07-15 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798214B (en) * | 2014-12-30 | 2017-11-07 | 天津重型装备工程研究有限公司 | A kind of method that round bar multi-ram forging shapes turbine blade |
| 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 |
| CN105195541B (en) * | 2015-10-13 | 2017-07-18 | 北京科技大学 | Overcritical power station steam turbine blade GH4738 alloy fine grain base preparation methods |
| 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 |
| 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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| CA601232A (en) * | 1960-07-05 | H. Kent Nelson | Manufacture by extrusion of turbine engine blades | |
| CN1807660A (en) * | 2006-02-09 | 2006-07-26 | 沈阳黎明航空发动机(集团)有限责任公司 | GH696 alloy vane ausform forming process |
| CN102310154A (en) * | 2011-09-20 | 2012-01-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Die in alloy blade precision forging process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05163505A (en) * | 1991-12-11 | 1993-06-29 | Kobe Steel Ltd | Method for forming powdery superalloy |
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Patent Citations (3)
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| CA601232A (en) * | 1960-07-05 | H. Kent Nelson | Manufacture by extrusion of turbine engine blades | |
| CN1807660A (en) * | 2006-02-09 | 2006-07-26 | 沈阳黎明航空发动机(集团)有限责任公司 | GH696 alloy vane ausform forming process |
| CN102310154A (en) * | 2011-09-20 | 2012-01-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Die in alloy blade precision forging process |
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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 |