CN102321818A - Method for smelting cast nickel base alloy K417G return - Google Patents
Method for smelting cast nickel base alloy K417G return Download PDFInfo
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Abstract
The invention relates to a method for smelting cast nickel base alloy K417G return, belonging to the technical field of metallurgy. The method comprises the following steps of: (1) carrying out surface treatment on the return; (2) carrying out primary refining under vacuum condition, cooling for case hardening; heating, shaping a case and then pouring to obtain primary ingot; (3) when chemical composition of the primary ingot reaches the standard, carrying out secondary refining, and pouring after the case hardening; when the chemical composition of the primary ingot exceeds the standard, preparing material used for adjusting composition, heating and melting the primary ingot under the vacuum condition and carrying out the secondary refining, then adding the material used for adjusting the chemical composition, and then carrying out the case shaping and pouring after the case hardening again. The chemical composition and performance index of the ingot prepared by the method provided by the invention can reach the original standard of the cast nickel base alloy K417G, and production cost for preparing the alloy casting is reduced.
Description
Technical field
The invention belongs to metallurgical technology field, particularly a kind of melting method of cast Ni-base alloy K417G returns.
Background technology
Cast Ni-base alloy K417G is the manufacturing materials of engine blade, and this alloy has higher phase stability, and is lower than this alloy Co and Ti content with the K417 alloy phase; High this alloy phase stability under the condition that works long hours; Do not separate out the σ phase after 850 ℃ of long timeliness, not only have the advantage that the K417 alloy density is little, plasticity good, medium temperature intensity is high, and price is relatively cheap; Be suitable as the turbine blade and the turning vane of aircraft engine, in ground combustion machine, also be widely used.
Adopt cast Ni-base alloy K417G to produce in the process of foundry goods, the alloy more than 60% is a pouring and riser systems, and foundry goods prepares a large amount of waste casting of generation in the process, and the overall utilization of alloy is merely 20 ~ 30%; A large amount of noble metals in the alloy can not be utilized effectively, and how utilizing the returns of cast Ni-base alloy K417G and waste casting is present urgent problem.
Summary of the invention
The present invention provides a kind of melting method of cast Ni-base alloy K417G returns, utilizes cast Ni-base alloy K417G returns and waste casting as raw material, adjusts composition after the melting again, is smelted into performance and original K417G alloy phase product together.
Method of the present invention is carried out according to the following steps:
1, the returns that the K417G nickel-base casting alloy produced when preparing foundry goods carry out surperficial blast to be handled, and removes corrosion, formwork and the impurity on surface;
2, will pass through the returns that surperficial blast handles and place vacuum melting furnace; Under vacuum condition, be heated to 1530 ± 10 ℃; Treat returns fusing back 1530 ± 10 ℃ with vacuum condition under carry out refining first time 20 ~ 40min, stop to heat nature then and be cooled to the surperficial conjunctiva of molten metal liquid; The material of conjunctiva is heated to 1450 ± 10 ℃ towards film, and cast obtains a defective material ingot again;
3, analyze the chemical ingredients of a defective material ingot;
Be C 0.16 ~ 0.20% by weight percentage when the chemical ingredients of a defective material ingot meets, Al 5.1 ~ 5.5%, and Ti 4.4 ~ 4.6%; Cr 9.1 ~ 9.4%, and Co 9.8 ~ 10.5%, and Mo 2.8 ~ 3.05%; B 0.017 ~ 0.022%, V0.70 ~ 0.75%, and Zr 0.06 ~ 0.08%; When surplus is Ni and impurity, a defective material ingot is placed vacuum melting furnace, under vacuum condition, be heated to 1530 ± 10 ℃; Treat defective material ingot fusing back 1530 ± 10 ℃ with vacuum condition under carry out the refining second time 20 ~ 40min, be cooled to surperficial conjunctiva then naturally; The molten metal of conjunctiva is heated to 1450 ± 10 ℃ towards film, and cast obtains two defective material ingots, processes the K417G nickel-base casting alloy;
When the chemical ingredients of a defective material ingot exceeds above-mentioned scope, prepare C, Al, Ti, Cr, CrB, Co, Mo, AlV and/or Zr as regulating the composition materials, require adjusting composition materials and the mixed total composition of a defective material ingot to meet the mentioned component scope; One defective material ingot is placed vacuum melting furnace, under vacuum condition, is heated to 1530 ± 10 ℃, again 1530 ± 10 ℃ with vacuum condition under carry out the refining second time 20 ~ 40min; Refining finishes the back and is cooled to surperficial conjunctiva naturally, and heating adds and regulates the composition materials towards film under vacuum condition then; When molten intravital adjusting composition materials all after the fusing, be cooled to surface conjunctiva once more naturally, the molten metal of conjunctiva once more is heated to 1450 ± 10 ℃ towards film, cast acquisition two defective material ingots are processed the K417G nickel-base casting alloy again.
The composition of above-mentioned K417G nickel-base casting alloy is C 0.14 ~ 0.20% by weight percentage, and Al 4.9 ~ 5.7%, and Ti 4.2 ~ 4.7%; Cr 8.6 ~ 9.5%, and Co 9.2 ~ 11.0%, and Mo 2.55 ~ 3.50%; B 0.013 ~ 0.022%; V0.60 ~ 0.90%, Zr 0.05 ~ 0.09%, and surplus is Ni and inevitable impurity.
Be heated to 1530 ± 10 ℃ in the above-mentioned step 2, the control TRT is 95 ~ 140min.
Be heated to 1530 ± 10 ℃ in the above-mentioned step 3, the control TRT is 100 ~ 150min.
When under vacuum condition, being heated to 1530 ± 10 ℃ in the above-mentioned step 2, vacuum tightness≤10.66Pa; 1530 ± 10 ℃ with vacuum condition under when carrying out first time refining, vacuum tightness≤1.33Pa.
When under vacuum condition, being heated to 1530 ± 10 ℃ in the above-mentioned step 3, vacuum tightness≤10.66Pa; 1530 ± 10 ℃ with vacuum condition under when carrying out second time refining, vacuum tightness≤1.33Pa; Heating under vacuum condition towards film, when add regulating the composition materials again, control vacuum tightness≤1.33Pa.
Method of the present invention utilizes the returns of cast Ni-base alloy K417G as raw material; Alloy through twice melting and adding adjusting material component; The chemical ingredients of finish mix ingot, performance index all reach the standard of original cast Ni-base alloy K417G, and aspects such as middle tensile strength, creep rupture life and thermal fatigue property are suitable with virgin material; Utilize the returns of cast Ni-base alloy K417G and can reduce noble metal consumption in a large number, reduce the production cost of this alloy-steel casting of preparation as raw material.
Embodiment
The C that adopts in the embodiment of the invention meets the GB1426-1978 technological standard, and Al meets the GB/T1196-2002 technological standard, and Ti meets the GB/T3620.1-1994 technological standard; Cr meets the GB/T3211-1987 technological standard; CrB accord with Q/3B272-2006 technological standard, Co meets the YS/T255-2000 technological standard, and Mo meets the GB/T3462-1982 technological standard; AlV meets the GB5063-85 technological standard, and Zr meets the YS/T397-1994 technological standard.
The returns that cast Ni-base alloy K417G produces when the preparation foundry goods in the embodiment of the invention are meant gating system part and waste casting.
The cast Ni-base alloy K417G that processes in the embodiment of the invention is behind 900 ℃ of insulation 20min, and testing its tensile strength is 640 ~ 680MPa, and relative elongation is 6 ~ 10%, and relative reduction in area is 8 ~ 12%.
The impurity component of the cast Ni-base alloy K417G for preparing in the embodiment of the invention is Si≤0.2%, Mn≤0.2%, S≤0.010%, P≤0.015% by weight percentage; Fe≤1.0%, Pb≤0.0005%, Bi≤0.0001%; As≤0.005%, Sn≤0.002%, Sb≤0.1%.
Embodiment 1
The returns that the K417G nickel-base casting alloy is produced when preparing foundry goods carry out surperficial blast processing, remove corrosion, formwork and the impurity on surface;
The returns that will pass through surperficial blast processing place vacuum melting furnace; Under vacuum tightness≤10.66Pa condition, be heated to 1530 ± 10 ℃; The control TRT is 140min; After treating the fusing of whole returns, 1530 ± 10 ℃ with vacuum tightness≤1.33Pa condition under carry out refining first time 20min, stop to heat nature then and be cooled to the surperficial conjunctiva of molten metal liquid; The material of conjunctiva is heated to 1450 ± 10 ℃ towards film, pours into a mould then and obtain a defective material ingot;
The chemical ingredients of analyzing a defective material ingot is C 0.14% by weight percentage, Al5.4%, and Ti 4.1%, and Cr 9.1%; Co 9.95%, and Mo 2.95%, and B 0.016, V0.55%; Zr 0.04%, and surplus is Ni and impurity, prepares C, Ti, CrB, VAl and Zr as regulating the composition materials, requires adjusting composition materials and the mixed total composition of a defective material ingot to meet and is C 0.16 ~ 0.20% by weight percentage; Al 5.1 ~ 5.5%, and Ti 4.4 ~ 4.6%, and Cr 9.1 ~ 9.4%, and Co 9.8 ~ 10.5%; Mo 2.8 ~ 3.05%, and B 0.017 ~ 0.022%, V0.70 ~ 0.75%, and Zr 0.06 ~ 0.08%; Surplus is the composition range of Ni and impurity, then a defective material ingot is placed vacuum melting furnace, under vacuum tightness≤10.66Pa condition, is heated to 1530 ± 10 ℃, and the control TRT is 100min; Treat defective material ingot fusing back 1530 ± 10 ℃ with vacuum tightness≤1.33Pa condition under carry out refining second time 30min, be cooled to molten metal surface conjunctiva again naturally, under vacuum tightness≤1.33Pa condition, heat then towards film, again adding adjusting composition materials; When molten intravital adjusting composition materials all after the fusing, be cooled to surface conjunctiva once more naturally, the molten metal of conjunctiva once more is heated to 1450 ± 10 ℃ towards film, again cast acquisition two defective material ingots; Process the K417G nickel-base casting alloy, composition is C 0.18% by weight percentage, and Al 5.5%, and Ti 4.5%; Cr 9.2%, and Co 9.9%, and Mo 2.94%, and B 0.020%; V0.71%, Zr 0.07%, and surplus is Ni and inevitable impurity;
Behind 900 ℃ of insulation 20min, testing its tensile strength is 640MPa with the cast Ni-base alloy K417G that processes, and relative elongation is 6%, and relative reduction in area is 12%;
The cast Ni-base alloy K417G that processes is processed the sample of diameter 5mm, under proof stress 235MPa and 950 ℃ of conditions of test temperature (unit elongation no requirement (NR)) carry out high-temperature long-lasting performance test, record time >=40min.
Embodiment 2
The returns that the K417G nickel-base casting alloy is produced when preparing foundry goods carry out surperficial blast processing, remove corrosion, formwork and the impurity on surface;
The returns that will pass through surperficial blast processing place vacuum melting furnace; Under vacuum tightness≤10.66Pa condition; Be heated to 1530 ± 10 ℃ earlier; Treat whole returns fusing back 1530 ± 10 ℃ with vacuum tightness≤1.33Pa condition under carry out refining first time 40min, stop to heat nature then and be cooled to the surperficial conjunctiva of molten metal liquid; The material of conjunctiva is heated to 1450 ± 10 ℃ towards film, and the control TRT is 120min, pours into a mould then to obtain a defective material ingot;
The chemical ingredients of analyzing a defective material ingot is C 0.18% by weight percentage, and Al 3.9%, and Ti 4.6%, and Cr 9.2%; Co8.8%, Mo 2.1%, and B 0.022%, V0.73%; Zr 0.07%, and surplus is Ni and impurity, prepares Al, Co and Mo as regulating the composition materials, requires adjusting composition materials and the mixed total composition of a defective material ingot to meet and is C 0.16 ~ 0.20% by weight percentage; Al 5.1 ~ 5.5%, and Ti 4.4 ~ 4.6%, and Cr 9.1 ~ 9.4%, and Co 9.8 ~ 10.5%; Mo 2.8 ~ 3.05%, and B 0.017 ~ 0.022%, V0.70 ~ 0.75%, and Zr 0.06 ~ 0.08%; Surplus is the composition range of Ni and impurity, then a defective material ingot is placed vacuum melting furnace, under vacuum tightness≤10.66Pa condition, is heated to 1530 ± 10 ℃, and the control TRT is 120min; One defective material ingot fusing back 1530 ± 10 ℃ with vacuum tightness≤1.33Pa condition under carry out refining second time 30min, be cooled to molten metal surface conjunctiva again naturally, under vacuum tightness≤1.33Pa condition, heat then towards film, again adding adjusting composition materials; When molten intravital adjusting composition materials all after the fusing, be cooled to surface conjunctiva once more naturally, the molten metal of conjunctiva once more is heated to 1450 ± 10 ℃ towards film, again cast acquisition two defective material ingots; Process the K417G nickel-base casting alloy, composition is C 0.17% by weight percentage, and Al 5.3%, and Ti 4.5%; Cr 8.7%, and Co 10.4%, and Mo 3.00%, and B 0.021%; V0.70%, Zr 0.06%, and surplus is Ni and inevitable impurity;
Behind 900 ℃ of insulation 20min, testing its tensile strength is 655MPa with the cast Ni-base alloy K417G that processes, and relative elongation is 7%, and relative reduction in area is 10%;
The cast Ni-base alloy K417G that processes is processed the sample of diameter 5mm, under proof stress 315MPa and 900 ℃ of conditions of test temperature (unit elongation no requirement (NR)) carry out high-temperature long-lasting performance test, record time >=70min.
Embodiment 3
The returns that the K417G nickel-base casting alloy is produced when preparing foundry goods carry out surperficial blast processing, remove corrosion, formwork and the impurity on surface;
The returns that will pass through surperficial blast processing place vacuum melting furnace; Under vacuum tightness≤10.66Pa condition; Be heated to 1530 ± 10 ℃ earlier; Treat whole returns fusing back 1530 ± 10 ℃ with vacuum tightness≤1.33Pa condition under carry out refining first time 30min, stop to heat nature then and be cooled to the surperficial conjunctiva of molten metal liquid; The material of conjunctiva is heated to 1450 ± 10 ℃ towards film, and the control TRT is 100min, pours into a mould then to obtain a defective material ingot;
The chemical ingredients of analyzing a defective material ingot is C 0.19% by weight percentage, and Al 4.8%, and Ti 3.9%, and Cr 9.3%; Co8.9%, Mo 3.05%, and B 0.019, V0.75%; Zr 0.08%, and surplus is Ni and impurity, prepares Al, Ti and Co as regulating the composition materials, requires adjusting composition materials and the mixed total composition of a defective material ingot to meet and is C 0.16 ~ 0.20% by weight percentage; Al 5.1 ~ 5.5%, and Ti 4.4 ~ 4.6%, and Cr 9.1 ~ 9.4%, and Co 9.8 ~ 10.5%; Mo 2.8 ~ 3.05%, and B 0.017 ~ 0.022%, V0.70 ~ 0.75%, and Zr 0.06 ~ 0.08%; Surplus is the composition range of Ni and impurity, then a defective material ingot is placed vacuum melting furnace, under vacuum tightness≤10.66Pa condition, is heated to 1530 ± 10 ℃, and the control TRT is 140min; One defective material ingot fusing back 1530 ± 10 ℃ with vacuum tightness≤1.33Pa condition under carry out refining second time 20min, be cooled to molten metal surface conjunctiva again naturally, under vacuum tightness≤1.33Pa condition, heat then towards film, again adding adjusting composition materials; When molten intravital adjusting composition materials all after the fusing, be cooled to surface conjunctiva once more naturally, the molten metal of conjunctiva once more is heated to 1450 ± 10 ℃ towards film, again cast acquisition two defective material ingots; Process the K417G nickel-base casting alloy, composition is C 0.18% by weight percentage, and Al 5.5%, and Ti 4.5%; Cr 9.2%, and Co 10.3%, and Mo 3.0%, and B 0.018%; V0.74%, Zr 0.07%, and surplus is Ni and inevitable impurity;
Behind 900 ℃ of insulation 20min, testing its tensile strength is 663MPa with the cast Ni-base alloy K417G that processes, and relative elongation is 8%, and relative reduction in area is 9%;
The cast Ni-base alloy K417G that processes is processed the sample of diameter 5mm, and (unit elongation requires >=2%) carried out high-temperature long-lasting performance test under proof stress 647MPa and 760 ℃ of conditions of test temperature, records time >=23min.
Embodiment 4
The returns that the K417G nickel-base casting alloy is produced when preparing foundry goods carry out surperficial blast processing, remove corrosion, formwork and the impurity on surface;
To pass through returning of surperficial blast processing and place vacuum melting furnace; Under vacuum tightness≤10.66Pa condition; Be heated to 1530 ± 10 ℃ earlier; Treat whole returns and waste casting fusing back 1530 ± 10 ℃ with vacuum tightness≤1.33Pa condition under carry out refining first time 30min, stop to heat nature then and be cooled to the surperficial conjunctiva of molten metal liquid; The material of conjunctiva is heated to 1450 ± 10 ℃ towards film, and the control TRT is 95min, pours into a mould then to obtain a defective material ingot;
The chemical ingredients of analyzing a defective material ingot is C 0.19% by weight percentage, and Al 5.4%, and Ti 4.6%, and Cr 9.4%; Co 10.5%, and Mo 2.8%, and B 0.017%, V0.75%; Zr 0.06%, and surplus is Ni and impurity, and a defective material ingot is placed vacuum melting furnace; Under vacuum tightness≤10.66Pa condition, be heated to 1530 ± 10 ℃, the control TRT is 150min, treats that defective material ingot fusing back carries out refining second time 40min under 1530 ± 10 ℃ and vacuum tightness≤1.33Pa condition;
Melt after the refining for the second time is cooled to surperficial conjunctiva naturally; Be heated to 1450 ± 10 ℃ then towards film, cast obtains two defective material ingots then, processes the K417G nickel-base casting alloy, and composition is C 0.18% by weight percentage; Al 5.5%, and Ti 4.6%, and Cr 9.3%; Co 11.2%, and Mo 2.55%, and B 0.016%; V0.75%, Zr 0.06%, and surplus is Ni and inevitable impurity;
Behind 900 ℃ of insulation 20min, testing its tensile strength is 679MPa with the cast Ni-base alloy K417G that processes, and relative elongation is 10%, and relative reduction in area is 8%.
Claims (6)
1. the melting method of cast Ni-base alloy K417G returns is characterized in that carrying out according to the following steps:
(1) returns that the K417G nickel-base casting alloy produced when preparing foundry goods carry out surperficial blast to be handled, and removes corrosion, formwork and the impurity on surface;
(2) will pass through the returns that surperficial blast handles and place vacuum melting furnace; Under vacuum condition, be heated to 1530 ± 10 ℃; Treat returns fusing back 1530 ± 10 ℃ with vacuum condition under carry out refining first time 20 ~ 40min, stop to heat nature then and be cooled to the surperficial conjunctiva of molten metal liquid; The material of conjunctiva is heated to 1450 ± 10 ℃ towards film, and cast obtains a defective material ingot again;
(3) chemical ingredients of analysis one defective material ingot;
Be C 0.16 ~ 0.20% by weight percentage when the chemical ingredients of a defective material ingot meets, Al 5.1 ~ 5.5%, and Ti 4.4 ~ 4.6%; Cr 9.1 ~ 9.4%, and Co 9.8 ~ 10.5%, and Mo 2.8 ~ 3.05%; B 0.017 ~ 0.022%, V0.70 ~ 0.75%, and Zr 0.06 ~ 0.08%; When surplus is Ni and impurity, a defective material ingot is placed vacuum melting furnace, under vacuum condition, be heated to 1530 ± 10 ℃; Treat defective material ingot fusing back 1530 ± 10 ℃ with vacuum condition under carry out the refining second time 20 ~ 40min, be cooled to surperficial conjunctiva then naturally; The molten metal of conjunctiva is heated to 1450 ± 10 ℃ towards film, and cast obtains two defective material ingots, processes the K417G nickel-base casting alloy;
When the chemical ingredients of a defective material ingot exceeds above-mentioned scope, prepare C, Al, Ti, Cr, CrB, Co, Mo, AlV and/or Zr as regulating the composition materials, require adjusting composition materials and the mixed total composition of a defective material ingot to meet the mentioned component scope; One defective material ingot is placed vacuum melting furnace, under vacuum condition, is heated to 1530 ± 10 ℃, again 1530 ± 10 ℃ with vacuum condition under carry out the refining second time 20 ~ 40min; Refining finishes the back and is cooled to surperficial conjunctiva naturally, and heating adds and regulates the composition materials towards film under vacuum condition then; When molten intravital adjusting composition materials all after the fusing, be cooled to surface conjunctiva once more naturally, the molten metal of conjunctiva once more is heated to 1450 ± 10 ℃ towards film, cast acquisition two defective material ingots are processed the K417G nickel-base casting alloy again.
2. the melting method of a kind of cast Ni-base alloy K417G returns according to claim 1 is characterized in that the composition of described K417G nickel-base casting alloy is C 0.14 ~ 0.20% by weight percentage, and Al 4.9 ~ 5.7%; Ti 4.2 ~ 4.7%, and Cr 8.6 ~ 9.5%, and Co 9.2 ~ 11.0%; Mo 2.55 ~ 3.50%, and B 0.013 ~ 0.022%, V0.60 ~ 0.90%; Zr 0.05 ~ 0.09%, and surplus is Ni and inevitable impurity.
3. the melting method of a kind of cast Ni-base alloy K417G returns according to claim 1 is characterized in that be heated to 1530 ± 10 ℃ described in the step (2), and the control TRT is 95 ~ 140min.
4. the melting method of a kind of cast Ni-base alloy K417G returns according to claim 1 is characterized in that said in the step (3) is heated to 1530 ± 10 ℃, and the control TRT is 100 ~ 150min.
5. the melting method of a kind of cast Ni-base alloy K417G returns according to claim 1, it is characterized in that described in the step (2) under vacuum condition, be heated to 1530 ± 10 ℃ the time, vacuum tightness≤10.66Pa; 1530 ± 10 ℃ with vacuum condition under when carrying out first time refining, vacuum tightness≤1.33Pa.
6. the melting method of a kind of cast Ni-base alloy K417G returns according to claim 1, it is characterized in that described in the step (3) under vacuum condition, be heated to 1530 ± 10 ℃ the time, vacuum tightness≤10.66Pa; 1530 ± 10 ℃ with vacuum condition under when carrying out second time refining, vacuum tightness≤1.33Pa; Described under vacuum condition, the heating towards film adds when regulating the composition materials control vacuum tightness≤1.33Pa again.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103556004A (en) * | 2013-11-11 | 2014-02-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing K438 alloy by adopting K438 alloy return material |
| CN103952578A (en) * | 2014-05-04 | 2014-07-30 | 江苏兴达高温合金科技有限公司 | K419 master alloy smelting process |
| CN103993185A (en) * | 2014-05-04 | 2014-08-20 | 江苏兴达高温合金科技有限公司 | Haynes C-276 alloy smelting technology |
| CN104451266A (en) * | 2014-10-28 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing K417G alloy by partially using DZ417G return scraps |
| CN111590034A (en) * | 2020-06-05 | 2020-08-28 | 山东瑞泰新材料科技有限公司 | Pouring method of nickel-based alloy casting |
| CN113667878A (en) * | 2021-08-23 | 2021-11-19 | 中航上大高温合金材料股份有限公司 | Smelting method of GH907 alloy |
| CN113667861A (en) * | 2021-08-23 | 2021-11-19 | 中航上大高温合金材料股份有限公司 | Smelting method of GH3625 alloy |
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| CN101709387A (en) * | 2009-11-27 | 2010-05-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for smelting nickel-based high temperature recycled alloy K3030 |
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| CN101709387A (en) * | 2009-11-27 | 2010-05-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for smelting nickel-based high temperature recycled alloy K3030 |
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| CN103556004A (en) * | 2013-11-11 | 2014-02-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing K438 alloy by adopting K438 alloy return material |
| CN103556004B (en) * | 2013-11-11 | 2015-10-21 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of K438 of employing revert prepares the preparation method of K438 alloy |
| CN103952578A (en) * | 2014-05-04 | 2014-07-30 | 江苏兴达高温合金科技有限公司 | K419 master alloy smelting process |
| CN103993185A (en) * | 2014-05-04 | 2014-08-20 | 江苏兴达高温合金科技有限公司 | Haynes C-276 alloy smelting technology |
| CN103993185B (en) * | 2014-05-04 | 2016-01-20 | 江苏兴达高温合金科技有限公司 | A kind of Kazakhstan C-276 alloy smelting technique |
| CN103952578B (en) * | 2014-05-04 | 2016-02-10 | 江苏兴达高温合金科技有限公司 | A kind of K491 mother alloy smelting technology |
| CN104451266A (en) * | 2014-10-28 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing K417G alloy by partially using DZ417G return scraps |
| CN111590034A (en) * | 2020-06-05 | 2020-08-28 | 山东瑞泰新材料科技有限公司 | Pouring method of nickel-based alloy casting |
| CN113667878A (en) * | 2021-08-23 | 2021-11-19 | 中航上大高温合金材料股份有限公司 | Smelting method of GH907 alloy |
| CN113667861A (en) * | 2021-08-23 | 2021-11-19 | 中航上大高温合金材料股份有限公司 | Smelting method of GH3625 alloy |
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Application publication date: 20120118 |