CN1053708C - 一种定向凝固优质铸造镍基高温合金 - Google Patents
一种定向凝固优质铸造镍基高温合金 Download PDFInfo
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- CN1053708C CN1053708C CN95110023A CN95110023A CN1053708C CN 1053708 C CN1053708 C CN 1053708C CN 95110023 A CN95110023 A CN 95110023A CN 95110023 A CN95110023 A CN 95110023A CN 1053708 C CN1053708 C CN 1053708C
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- 239000000956 alloy Substances 0.000 title claims abstract description 21
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 6
- 238000007711 solidification Methods 0.000 title claims abstract description 6
- 230000008023 solidification Effects 0.000 title claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 title abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 5
- 229910000601 superalloy Inorganic materials 0.000 claims description 5
- 239000007769 metal material Substances 0.000 abstract description 2
- 229910052727 yttrium Inorganic materials 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 2
- 229910052787 antimony Inorganic materials 0.000 abstract 1
- 229910052785 arsenic Inorganic materials 0.000 abstract 1
- 229910052797 bismuth Inorganic materials 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 229910052745 lead Inorganic materials 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 238000010248 power generation Methods 0.000 abstract 1
- 229910052718 tin Inorganic materials 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 102220493430 Putative uncharacterized protein encoded by MIR7-3HG_K17Q_mutation Human genes 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
本发明涉及金属材料,具体地说是一种优质铸造镍基高温合金。采用化学成份为C,0.01~0.30%;Cr,8~10%;Al,4~6%;Ti,3.5~5.5%;Mo,2~4%;Co,8~12%;V,0.3~1.2%;B,0.005~0.030%;Y,0.00~0.50%;Ni,余;S≤0.008%;P≤0.005%;Fe≤0.5%;Si≤0.2%;Mn≤0.2%;Pb≤0.0005%;As≤0.001%;Sb≤0.001%;Bi≤0.0005%;Sn≤0.001%(均为重量百分比)的合金材料。本定向凝固优质铸造镍基高温合金,可以满足航空、航天、舰船和发电等燃气涡轮用高温零部件的需求。
Description
本发明涉及金属材料,具体地说是一种优质铸造镍基高温合金。
用于制造航空发动机涡轮叶片的高温合金,通常是选用成份为C,0.18;Cr,10;Co,15,Al,5.5;Ti,4.5/5;Mo,3;V,0.5/1;Zr,0.05/1;B,0.001/0.002(均为重量%)的IN100合金和成份为C,0.18;Cr,9.5,Co,10;Al,5.5:Ti,4.65;Mo,2.5;V,0.95;Zr,0.06;B,0.015(均为重量%)的K17G合金。上述这两种合金均为普通铸造合金,在铸态下使用具有等轴晶粒组织,持久强度较低,不能满足更高性能航空发动机涡轮叶片的要求。同时,成份中均未对微量杂质元素提出更严格的要求。
本发明的目的是针对上述存在的缺点,提供一种具有良好定向凝固工艺性能,防止热裂纹出现,持久强度高的高温合金。
本发明的技术要点,化学成份为C,0.01~0.30%;Cr,8~10%;Al,4~6%;Ti,3.5~5.5%;Mo,2≈4%;Co,8~12%;V,0.3~1.2%;B,0.005~0.030%;Y,0.00~0.50%;Ni,余;S≤0.008%;P≤0.005%;Fe≤0.5%;Si≤0.2%;Mn≤0.2%;Pb≤0.0005%;As≤0.001%;Sb≤0.001%;Bi≤0.0005%;Sn≤0.001%(均为重量百分比)的合金材料,采用钢液温度为1480~1550℃;模壳温度1450~1550℃;抽拉速度6~9mm/min;温度梯度50~100℃/cm,及经制度为1150~1250℃,保温1~8小时,空冷;900~1000℃,保温8~16小时并空冷热处理制成。
本发明与同类型合金IN100和K17G比较,不含有合金元素Zr,有利于改善定向凝固性能,防止热裂纹出现,加入了稀土元素钇,以改善合金的横向性能,采用定向凝固工艺制成定向结晶零件,消除了有害的横向晶界,可明显提高蠕变持久性能。与IN100和K17G合金比较,合金不是铸态使用,而是热处理状态使用。本定向凝固优质铸造镍基高温合金,可以满足航空、航天、舰船和发电等燃气涡轮用高温零部件的需求。
实施例1
1)定向工艺:模壳温度1480℃,钢液温度1500℃,抽拉速度7mm/min,温度梯度80℃/cm。
2)合金成份:C,0.16;Cr,8.86;Co,9.99;Mo,3.18;V,0.74;B,0.017;Al,5.38;Ti,4.70;Ni,余;P<0.0009;Si<0.005;S<0.003;Mn,0.10;Pb<0.0005;As<0.001;Sb<0.001;Bi<0.0005;Sn<0.001;(均为重量%)
3)热处理:1220℃,4h,空冷+980℃,16h,空冷
4)力学性能
瞬时拉伸性能
σb(MPa) σ0.2(MPa)δ(%) φ(%)
室温 1209.0 775.0 18 19
900℃ 787.0 661.0 32 43
持久性能
τ(h) δ(%) ψ(%)
760℃,725MPa 116.0 21.0 24.0
980℃,216MPa 74.0 35.0 45.0
实施例2
1)定向工艺:模壳温度1500℃,钢液温度1510℃,抽拉速度6mm/min,温度梯度70℃/cm。
2)合金成份:C,0.17;Cr,8.91;Co,9.85;Mo,3.05;V,0.65;B,0.018:Al,5.49;Ti,4.44;Ni,余;P,0.005:S,0.006;Si,0.092;Y,0.028;Pb<0.0005;As<0.001;Sb<0.001;Bi<0.0005;Sn<0.001;(均为重量%)
3)热处理1220℃,2h,空冷+980℃,16h,空冷
4)力学性能:
瞬时拉伸性能
σb(MPa) σ0.2(MPa) δ(%) ψ(%)室温 1012 777 10.0 15.0900℃ 774 671 35.0 47.0 持久性能
τ(h) δ(%) ψ(%)760℃,725MPa 163.0 20.0 23.5980℃,216MPa 68.0 23.1 40.0比较例
1.与同类型合金IN731和国内K17G比较,持久性能大幅度提高
τ(h) δ(%) ψ(%)DZ17G 760℃,725MPa 116~163 21.0 24.0K17G 760℃,686MPa 56 3.9DZ17G 980℃,216MPa 68~74 23.1~35.0 45.0~47.0℃K17G 980℃,200MPa 43.4 5.6
从上述数据可以清楚看出,DZ17G在同样温度而应力比K17G合金要大的条件下,持久时间和持久塑性均明显改善了。
2.与同类型合金IN731和国内K17Q比较,室温和高温瞬时拉伸塑性有明显改善
σb(MPa) σ0.2(MPa) δ(%) ψ(%)室温 DZ17G 1012~1209 775~777 10~18 15~19
K17G 1037 823 11.2 14.1900℃ DZ17G 774~787 661~671 32~35 43~47
K17G 762 635 9.3 12.9
Claims (1)
1.一种定向凝固优质铸造镍基高温合金,其特征是采用化学成份为C,0.01~0.30%;Cr,8~10%;Al,4~6%;Ti,3.5~5.5%;Mo,2~4%;Co,8~12%;V,0.3~1.2%;B,0.005~0.030%;Y,0.00~0.50%;Ni,余;S≤0.008%;P≤0.005%;Fe≤0.5%;Si≤0.2%;Mn≤0.2%;Pb≤0.0005%;As≤0.001%;Sb≤0.001%;Bi≤0.0005%;Sn≤0.001%(均为重量百分比)的合金材料。
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CN95110023A CN1053708C (zh) | 1995-01-26 | 1995-01-26 | 一种定向凝固优质铸造镍基高温合金 |
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CN95110023A CN1053708C (zh) | 1995-01-26 | 1995-01-26 | 一种定向凝固优质铸造镍基高温合金 |
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CN1127795A CN1127795A (zh) | 1996-07-31 |
CN1053708C true CN1053708C (zh) | 2000-06-21 |
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CN101121977B (zh) * | 2006-08-09 | 2010-05-12 | 中国科学院金属研究所 | 一种定向凝固镍基高温合金及其热处理工艺 |
CN100543164C (zh) * | 2007-04-25 | 2009-09-23 | 中国科学院金属研究所 | 一种定向凝固抗热腐蚀镍基铸造高温合金及其制备方法 |
CN103276331A (zh) * | 2013-05-06 | 2013-09-04 | 无锡山发精铸科技有限公司 | 一种消除镍基涡轮叶片缩松缺陷的方法 |
CN105438637A (zh) * | 2015-12-24 | 2016-03-30 | 常熟市新冶机械制造有限公司 | 摩根线材打捆机 |
Citations (1)
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JPS56108852A (en) * | 1980-01-17 | 1981-08-28 | Cannon Muskegon Corp | Directional cast alloy for high temperature operation |
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JPS56108852A (en) * | 1980-01-17 | 1981-08-28 | Cannon Muskegon Corp | Directional cast alloy for high temperature operation |
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