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 PDF

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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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less
alloy
directional solidification
based high
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CN1127795A (zh
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郭建亭
王淑荷
李英敖
张志亚
李辉
殷为民
胡壮麒
管恒荣
唐亚俊
谭明晖
赖万慧
郑启
陈全金
刘泽州
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Institute of Metal Research of CAS
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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

一种定向凝固优质铸造镍基高温合金
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。
CN95110023A 1995-01-26 1995-01-26 一种定向凝固优质铸造镍基高温合金 Expired - Fee Related CN1053708C (zh)

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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

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Publication number Priority date Publication date Assignee Title
JPS56108852A (en) * 1980-01-17 1981-08-28 Cannon Muskegon Corp Directional cast alloy for high temperature operation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56108852A (en) * 1980-01-17 1981-08-28 Cannon Muskegon Corp Directional cast alloy for high temperature operation

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