CN101709387A - Method for smelting nickel-based high temperature recycled alloy K3030 - Google Patents
Method for smelting nickel-based high temperature recycled alloy K3030 Download PDFInfo
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Abstract
A method for smelting nickel-based high temperature recycled alloy K3030 belongs to the technical field of metallurgy and comprises the following steps: carrying out sandblasting on the recycled alloy and/or waste casting, carrying out refining under vacuum, and then pouring to obtain a primary material ingot; preparing nickel, chromium, titanium and/or carbon as the material for regulating compositions, carry out pouring after secondary refining under vacuum, or smelting the film after forming the film, adding the titanium and/or carbon in the materials for regulating the elemental compositions and then carrying out pouring after alloying. In the method, the recycled alloy or waste casting is re-smelted. The method effectively utilizes the recycled alloy K3030 and the waste casting, saves the expensive elements and plays a positive role in protecting the environment. The performances of the alloy castings prepared by the method are equivalent to the performances of the castings prepared by the new raw materials, thus meeting the requirements for the performances of the structural components of the engines.
Description
Technical field
The invention belongs to metallurgical technology field, particularly a kind of alloy melting method of nickel base superalloy K3030 returns.
Background technology
The K3030 alloy is the solution strengthening type superalloy of early-stage development, chemical ingredients is simple, have heat resistance and high-ductility preferably below 800 ℃, and have good anti-oxidant, a thermal fatigue resistance, be mainly used in the turbine engine combustion chamber components of working below 800 ℃ and require below 1100 ℃ anti-oxidant, bear other less heat preservation components of load, this alloy can adopt antivacuum induction melting or vacuum induction melting production, can adopt antivacuum remelting or vacuum remelting pouring cast part in the production process of foundry goods.Casting K3030 superalloy is 20～30% in the casting rate only than the effective rate of utilization of its alloy under the condition with higher, produces a large amount of returns in the castingprocesses.Especially the Ni in the superalloy, Cr etc. belong to the rare expensive element of country, are therefore guaranteeing that it is very necessary to utilize returns to prepare superalloy under functional quality and the safe and reliable prerequisite.
Summary of the invention
At above technical problem, the invention provides a kind of alloy melting method of nickel base superalloy K3030 returns, purpose is to be prepared into the K3030 alloy that can be used in preparation engine structure spare by with returns and/or waste casting melting again.
Method of the present invention is carried out according to the following steps:
1, obtain a defective material ingot:
Returns that produce when nickel base superalloy K3030 is prepared foundry goods and/or waste casting carry out blast to be handled, the surface-conditioning of returns and/or waste casting is clean, place vacuum induction furnace then, starting vacuum apparatus vacuumizes, behind vacuum tightness≤1.33Pa, send the electrofusion alloy, require vacuum tightness≤10.66Pa in the alloy melting process, alloy liquid is warming up to 1530～1600 ℃ carries out refining, require vacuum tightness≤1.33Pa in the refining process, refining time is 20～40min; Refining is cooled to alloy molten surface conjunctiva after finishing.Alloy liquation behind the conjunctiva is heated to 1500～1580 ℃, pours into a defective material ingot.
2, prepare secondary refining:
Analyze the chemical ingredients of a defective material ingot, when the chemical ingredients of a defective material ingot is Ti 0.25～0.32% by weight percentage, Cr20.5～21.0%, C 0.08～0.11%, when surplus is Ni, prepares to carry out secondary refining; When Ti, Cr in the defective material ingot and/or C exceed above-mentioned scope, prepare nickel, chromium, titanium and/or carbon as regulating the composition materials, make the composition of total material of regulating composition materials and a defective material ingot meet the mentioned component scope.
3, secondary refining:
When the chromium component that do not need to regulate in the defective material ingot composition, one defective material ingot is placed vacuum induction furnace, starting vacuum apparatus vacuumizes, as vacuum tightness≤1.33Pa, secondary refining ℃ is carried out in feeding temperature-raising to 1530～1600, requires vacuum tightness≤10.66Pa in the alloy melting process, and the secondary refining time is 20～40min, control vacuum tightness≤1.33Pa in the refining process, secondary refining is cooled to alloy molten surface conjunctiva after finishing.When needs are regulated chromium component in the defective material ingot, nickel and/or chromium in one defective material ingot and the adjusting composition materials are placed vacuum induction furnace, starting vacuum apparatus vacuumizes, when vacuum tightness≤1.33Pa, secondary refining ℃ carries out in feeding temperature-raising to 1530～1600, require vacuum tightness≤10.66Pa in the alloy liquation melting process, the secondary refining time is 20～40min, controls vacuum tightness≤1.33Pa in the secondary refining process; Refining is cooled to alloy molten surface conjunctiva after finishing; When needs are regulated titanium in the defective material ingot and/or carbon, the alloy liquation of conjunctiva behind the secondary refining is heated to conjunctiva to be melted fully, under vacuum condition, carry out alloying, control vacuum tightness≤1.33Pa, and nickel, titanium and/or carbon in the elemental composition materials are regulated in adding, insulation 7～10min is cooled to alloy molten surface conjunctiva.
4, obtain the K3030 alloy:
When not needing to regulate titanium in the defective material ingot and carbon in the step 3, the alloy liquation that secondary refining is finished the back conjunctiva is heated to 1500～1580 ℃, controls vacuum tightness≤1.33Pa in the heat-processed, pours into returns K3030 alloy pig then; When needing to regulate titanium in the defective material ingot and/or carbon in the step 3, the alloy liquation of conjunctiva after the alloying is heated to 1500～1580 ℃, control vacuum tightness≤1.33Pa in the heat-processed, pour into returns K3030 alloy pig then.
Temperature when being cooled to conjunctiva in the aforesaid method is 1430 ± 20 ℃.
Method of the present invention is by carrying out melting again with returns or waste casting; This method has effectively been utilized returns, the waste casting of K3030, has saved expensive element, and active effect has been played in environment protection, and is identical with the cast properties that is prepared by new raw material by the alloy-steel casting of this method preparation, satisfies the performance requriements of engine structure spare; Be expected this alloy is further expanded in the production that is applied to other model engines or civilian goods combustion machine, can obtain bigger economic benefit.
Embodiment
The purity of the nickel that adopts in the embodiment of the invention, titanium, chromium, carbon is respectively Ni in the nickel element 〉=99.9%, Ti in the titanium elements 〉=99.7%, Cr in the chromium element 〉=99%, C in the carbon 〉=99.5%.
Dead head part returns and/or waste casting that the returns that adopt in the embodiment of the invention produce when preparing foundry goods for nickel base superalloy K3030.
Embodiment 1
The returns that produce when nickel base superalloy K3030 is cast carry out blast to be handled, the surface-conditioning of returns is clean, placing vacuum induction furnace to start vacuum apparatus then vacuumizes, when vacuum tightness≤1.33Pa, feeding temperature-raising to 1600 ℃ refining, control vacuum tightness≤10.66Pa in its interalloy liquation melting process, refining 20min controls vacuum tightness≤1.33Pa in the refining process; After finishing, the refining refining is cooled to alloy molten surface conjunctiva.The alloy liquation of conjunctiva is heated to 1580 ℃, pours into a defective material ingot.
The chemical ingredients of analyzing a defective material ingot is Ti 0.30% by weight percentage, and Cr 20.9%, and C 0.10%, and surplus is Ni.The composition range that the chemical ingredients of this material ingot all is positioned at requirement need not add the adjusting material.
One defective material ingot is placed vacuum induction furnace, starting vacuum apparatus vacuumizes, when vacuum tightness≤1.33Pa, feeding temperature-raising to 1550 ℃ carries out secondary refining, require vacuum tightness≤10.66Pa in the alloy liquation melting process, the secondary refining time is 30min, controls vacuum tightness≤1.33Pa in the secondary refining process; Secondary refining is cooled to alloy molten surface conjunctiva after finishing.
The alloy liquation of conjunctiva behind the secondary refining is heated to 1580 ℃, pours into returns K3030 alloy pig.
Temperature when being cooled to conjunctiva is 1430 ± 20 ℃.
The returns K3030 alloy pig that obtains is carried out performance test.Tensile strength 195MPa under 800 ℃ of hot conditionss, relative reduction in area is 42.0%, be 387.4h creep rupture life.The performance of virgin material K3030 alloy is respectively, tensile strength 200MPa under 800 ℃ of hot conditionss, and relative reduction in area is that be 350h the creep rupture life under 35%, 800 ℃, 44MPa.Standard-required 〉=100h creep rupture life under 800 ℃ of this alloys, the 44MPa.
Embodiment 2
The returns that produce when nickel base superalloy K3030 is cast carry out blast to be handled, the surface-conditioning of returns is clean, placing vacuum induction furnace to start vacuum apparatus then vacuumizes, as vacuum tightness≤1.33Pa, feeding temperature-raising to 1550 ℃, refining 30min controls vacuum tightness≤10.66Pa in its interalloy liquation melting process, controls vacuum tightness≤1.33Pa in the refining process; After finishing, the refining refining is cooled to alloy molten surface conjunctiva.The alloy liquation of conjunctiva is heated to 1550 ℃, pours into a defective material ingot.
The chemical ingredients of analyzing a defective material ingot is Ti 0.20% by weight percentage, and Cr 20.7%, and C 0.09%, and surplus is Ni.According to this chemical ingredients as seen, Ti surpasses composition range, needs to adjust addition element and regulates composition.Prepare titanium elements and regulate materials, calculate according to Ti 0.3%, other constituent content is Cr 20.68% behind the adding Ti element, and C 0.09% meets the composition range requirement.
One defective material ingot is placed vacuum induction furnace, starting vacuum apparatus vacuumizes, when vacuum tightness≤1.33Pa, feeding temperature-raising to 1530 ℃ carries out secondary refining, require vacuum tightness≤10.66Pa in the alloy liquation melting process, the secondary refining time is 40min, controls vacuum tightness≤1.33Pa in the secondary refining process; Secondary refining is cooled to alloy molten surface conjunctiva after finishing.
The alloy liquation of secondary refining conjunctiva is heated to conjunctiva melts fully and carry out alloying, require vacuum tightness≤1.33Pa in the heat-processed, and add titanium elements and regulate and use element, under the complete melted state of conjunctiva, be incubated 7min, be cooled to the alloy surface conjunctiva then.
Conjunctiva alloy liquation after the alloying is heated to 1550 ℃, pours into returns K3030 alloy pig.
The returns K3030 alloy pig that obtains is carried out performance test.Tensile strength 215MPa under 800 ℃ of hot conditionss, relative reduction in area is that be 378.52h the creep rupture life under 53.0%, 800 ℃, 44MPa.The performance of virgin material K3030 alloy is respectively, tensile strength 200MPa under 800 ℃ of hot conditionss, and relative reduction in area is that be 350h the creep rupture life under 35%, 800 ℃, 44MPa.Standard-required 〉=100h creep rupture life under 800 ℃ of this alloys, the 44MPa.
Embodiment 3
The returns that produce when nickel base superalloy K3030 is cast carry out blast to be handled, the surface-conditioning of returns is clean, placing vacuum induction furnace to start vacuum apparatus then vacuumizes, when vacuum tightness≤1.33Pa, feeding temperature-raising to 1530 ℃, refining 40min controls vacuum tightness≤10.66Pa in its interalloy liquation melting process, controls vacuum tightness≤1.33Pa in the refining process; After finishing, the refining refining is cooled to alloy molten surface conjunctiva.The alloy liquation of conjunctiva is heated to 1530 ℃, pours into a defective material ingot.
The chemical ingredients of analyzing a defective material ingot is Ti 0.31% by weight percentage, and Cr 20%, and C 0.09%, and surplus is Ni.According to this chemical ingredients as seen, Cr surpasses composition range, needs to adjust to add to regulate material.Prepare the chromium element and regulate materials, calculate according to Cr 21%, other constituent content is Ti 0.30% behind the adding Cr element, and C 0.089% meets the composition range requirement.
One defective material ingot and elemental chromium are placed vacuum induction furnace, starting vacuum apparatus vacuumizes, when vacuum tightness≤1.33Pa, feeding temperature-raising to 1600 ℃ carries out secondary refining, require vacuum tightness≤10.66Pa in the alloy liquation melting process, the secondary refining time is 20min, controls vacuum tightness≤1.33Pa in the secondary refining process; Secondary refining is cooled to alloy molten surface conjunctiva after finishing.
Conjunctiva alloy liquation behind the secondary refining is heated to 1530 ℃, pours into returns K3030 alloy pig.
The returns K3030 alloy pig that obtains is carried out performance test.Tensile strength 230MPa under 800 ℃ of hot conditionss, relative reduction in area is that be 387.24h the creep rupture life under 45.0%, 800 ℃, 44MPa.The performance of virgin material K3030 alloy is respectively, tensile strength 200MPa under 800 ℃ of hot conditionss, and relative reduction in area is that be 350h the creep rupture life under 35%, 800 ℃, 44MPa.Standard-required 〉=100h creep rupture life under 800 ℃ of this alloys, the 44MPa.
Embodiment 4
Returns that produce when nickel base superalloy K3030 is cast and waste casting carry out blast to be handled, the surface-conditioning of returns and waste casting is clean, placing vacuum induction furnace to start vacuum apparatus then vacuumizes, as vacuum tightness≤1.33Pa, feeding temperature-raising to 1570 ℃, refining 35min controls vacuum tightness≤10.66Pa in its interalloy liquation melting process, controls vacuum tightness≤1.33Pa in the refining process; After finishing, the refining refining is cooled to alloy molten surface conjunctiva.The alloy liquation of conjunctiva is heated to 1570 ℃, pours into a defective material ingot.
The chemical ingredients of analyzing a defective material ingot is Ti 0.31% by weight percentage, and Cr 20.5%, and C 0.12%, and surplus is Ni.According to this chemical ingredients as seen, C surpasses composition range, needs to adjust to add to regulate material.Prepare nickel, chromium, element adjusting materials, calculate according to C 0.1%, other constituent content is Ti 0.25% behind the adding nickel element, Cr17.08% chromium exceeds composition range, and titanium also exceeds setting range behind the adjustment chromium, and therefore composition is adjusted into Ti 0.3% the most at last, Cr 21.0%, and C 0.1%.
One defective material ingot and elemental chromium are placed vacuum induction furnace, starting vacuum apparatus vacuumizes, as vacuum tightness≤1.33Pa, feeding temperature-raising to 1570 ℃ carries out secondary refining, require vacuum tightness≤10.66Pa in the alloy liquation melting process, the secondary refining time is 25min, controls vacuum tightness≤1.33Pa in the secondary refining process; Secondary refining is cooled to alloy molten surface conjunctiva after finishing.
The alloy liquation of conjunctiva is heated to conjunctiva melts fully and carry out alloying, require vacuum tightness≤1.33Pa in the heat-processed, and add and regulate titanium and carbon in the materials, insulation 10min is cooled to the alloy surface conjunctiva then;
Conjunctiva alloy liquation after the alloying is heated to 1560 ℃, pours into returns K3030 alloy pig.
The returns K3030 alloy pig that obtains is carried out performance test.Tensile strength 215MPa under 800 ℃ of hot conditionss, relative reduction in area is that be 170.4h the creep rupture life under 51.0%, 800 ℃, 44MPa.The performance of virgin material K3030 alloy is respectively, tensile strength 200MPa under 800 ℃ of hot conditionss, and relative reduction in area is that be 350h the creep rupture life under 35%, 800 ℃, 44MPa.Standard-required 〉=100h creep rupture life under 800 ℃ of this alloys, the 44MPa.
Claims (3)
1. the alloy melting method of nickel base superalloy K3030 returns, it is characterized in that carrying out according to the following steps: returns that (1) produces when nickel base superalloy K3030 is prepared foundry goods and/or waste casting carry out blast to be handled, the surface-conditioning of returns and/or waste casting is clean, place vacuum induction furnace then, starting vacuum apparatus vacuumizes, behind vacuum tightness≤1.33Pa, send the electrofusion alloy, alloy liquid is warming up to 1530～1600 ℃ carries out refining, require vacuum tightness≤1.33Pa in the refining process, refining time is 20～40min; Refining is cooled to alloy molten surface conjunctiva after finishing; Alloy liquation behind the conjunctiva is heated to 1500～1580 ℃, pours into a defective material ingot; (2) analyze the chemical ingredients of a defective material ingot, when the chemical ingredients of a defective material ingot by weight percentage at Ti 0.25～0.32%, Cr 20.5～21.0%, C 0.08～0.11%, surplus is in the Ni scope time, prepares to carry out secondary refining; When Ti, Cr in the defective material ingot and/or C exceed above-mentioned scope, prepare nickel, chromium, titanium and/or carbon as regulating the composition materials, make the composition of total material of regulating composition materials and a defective material ingot meet the mentioned component scope; (3) when the chromium component that do not need to regulate in the defective material ingot composition, one defective material ingot is placed vacuum induction furnace, starting vacuum apparatus vacuumizes, as vacuum tightness≤1.33Pa, secondary refining ℃ carries out in feeding temperature-raising to 1530～1600, the secondary refining time is 20～40min, controls vacuum tightness≤1.33Pa in the refining process, and secondary refining is cooled to alloy molten surface conjunctiva after finishing; When needs are regulated nickel in the defective material ingot, chromium component, nickel and/or chromium in one defective material ingot and the adjusting composition materials are placed vacuum induction furnace, starting vacuum apparatus vacuumizes, when vacuum tightness≤1.33Pa, secondary refining ℃ carries out in feeding temperature-raising to 1530～1600, the secondary refining time is 20～40min, controls vacuum tightness≤1.33Pa in the secondary refining process; Secondary refining is cooled to alloy molten surface conjunctiva after finishing; When needs are regulated titanium in the defective material ingot and/or carbon, the alloy liquation of conjunctiva behind the secondary refining is heated to conjunctiva to be melted fully, under vacuum condition, carry out alloying, control vacuum tightness≤1.33Pa, and titanium and/or carbon in the elemental composition materials are regulated in adding, insulation 7～10min is cooled to alloy molten surface conjunctiva; (4) when not needing to regulate titanium in the defective material ingot and carbon in the step 3, the alloy liquation that secondary refining is finished the back conjunctiva is heated to 1500～1580 ℃, controls vacuum tightness≤1.33Pa in the heat-processed, pours into returns K3030 alloy pig then; When needing to regulate titanium in the defective material ingot and/or carbon in the step 3, the alloy liquation of conjunctiva after the alloying is heated to 1500～1580 ℃, control vacuum tightness≤1.33Pa in the heat-processed, pour into returns K3030 alloy pig then.
2. the alloy melting method of a kind of nickel base superalloy K3030 returns according to claim 1 is characterized in that sending the electrofusion alloy in the described step (1), requires vacuum tightness≤10.66Pa in the alloy melting process.
3. the alloy melting method of a kind of nickel base superalloy K3030 returns according to claim 1, it is characterized in that feeding temperature-raising to 1530 in the described step (3)～1600 ℃ carries out secondary refining, requires vacuum tightness≤10.66Pa in the alloy liquation melting process.
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Cited By (12)
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| CN101994019A (en) * | 2010-10-22 | 2011-03-30 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing nickel-based alloy by stepwise adding carbon in melting process |
| CN102312113A (en) * | 2011-09-28 | 2012-01-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Melting method of high chromium K4648 nickel-based casting alloy revert |
| CN102321818A (en) * | 2011-09-28 | 2012-01-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for smelting cast nickel base alloy K417G return |
| CN102560165A (en) * | 2010-12-29 | 2012-07-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for smelting K417G alloy by using K417 alloy returns |
| CN102719681A (en) * | 2012-07-16 | 2012-10-10 | 沈阳金纳新材料股份有限公司 | Decarbonization method of nickel or nickel alloy recovery smelting |
| CN102965535A (en) * | 2012-11-15 | 2013-03-13 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing alloy K414 from return scraps of cast high-temperature alloy K414 |
| CN105420524A (en) * | 2015-11-11 | 2016-03-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing K424 cast superalloy through K417G and DZ417G alloy returns |
| CN106756439A (en) * | 2016-12-05 | 2017-05-31 | 安徽永川电气设备有限公司 | A kind of low chrome casting switch cubicle condensation tube preparation method |
| CN109097673A (en) * | 2018-07-23 | 2018-12-28 | 江苏美特林科特殊合金股份有限公司 | The method for preparing high temperature alloy using W, Mo, Ti, Zr leftover pieces |
| CN113512654A (en) * | 2021-06-02 | 2021-10-19 | 北京工业大学 | Short-process recycling method for return materials |
| CN113913631A (en) * | 2021-10-13 | 2022-01-11 | 沈阳科金特种材料有限公司 | Method for smelting return material of GH3039 material for combustion engine |
| CN113930617A (en) * | 2021-10-20 | 2022-01-14 | 成都先进金属材料产业技术研究院股份有限公司 | Recovery method of GH5188 cobalt-based high-temperature alloy return material |
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- 2009-11-27 CN CN200910220237XA patent/CN101709387B/en not_active Expired - Fee Related
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| CN101994019B (en) * | 2010-10-22 | 2012-06-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing nickel-based alloy by stepwise adding carbon in melting process |
| CN101994019A (en) * | 2010-10-22 | 2011-03-30 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing nickel-based alloy by stepwise adding carbon in melting process |
| CN102560165B (en) * | 2010-12-29 | 2013-10-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for smelting K417G alloy by using K417 alloy returns |
| CN102560165A (en) * | 2010-12-29 | 2012-07-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for smelting K417G alloy by using K417 alloy returns |
| CN102312113A (en) * | 2011-09-28 | 2012-01-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Melting method of high chromium K4648 nickel-based casting alloy revert |
| CN102321818A (en) * | 2011-09-28 | 2012-01-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for smelting cast nickel base alloy K417G return |
| CN102719681A (en) * | 2012-07-16 | 2012-10-10 | 沈阳金纳新材料股份有限公司 | Decarbonization method of nickel or nickel alloy recovery smelting |
| CN102965535A (en) * | 2012-11-15 | 2013-03-13 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing alloy K414 from return scraps of cast high-temperature alloy K414 |
| CN102965535B (en) * | 2012-11-15 | 2014-12-10 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing alloy K414 from return scraps of cast high-temperature alloy K414 |
| CN105420524A (en) * | 2015-11-11 | 2016-03-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing K424 cast superalloy through K417G and DZ417G alloy returns |
| CN106756439A (en) * | 2016-12-05 | 2017-05-31 | 安徽永川电气设备有限公司 | A kind of low chrome casting switch cubicle condensation tube preparation method |
| CN109097673A (en) * | 2018-07-23 | 2018-12-28 | 江苏美特林科特殊合金股份有限公司 | The method for preparing high temperature alloy using W, Mo, Ti, Zr leftover pieces |
| CN113512654A (en) * | 2021-06-02 | 2021-10-19 | 北京工业大学 | Short-process recycling method for return materials |
| CN113913631A (en) * | 2021-10-13 | 2022-01-11 | 沈阳科金特种材料有限公司 | Method for smelting return material of GH3039 material for combustion engine |
| CN113930617A (en) * | 2021-10-20 | 2022-01-14 | 成都先进金属材料产业技术研究院股份有限公司 | Recovery method of GH5188 cobalt-based high-temperature alloy return material |
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