海洋环境用新型高强耐蚀GH4925合金的显微组织和力学性能
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- 英文论文题名：Microstructures and Mechanical Properties of a New Corrosion-resistant Alloy GH4925 with High Strength for Marine Environments
- 论文作者：石照夏 ; 颜晓峰 ; 周江波 ; 赵明汉 ; 段春华
- 英文论文作者：Shi Zhaoxia ; Yan Xiaofeng ; Zhou Jiangbo ; Zhao Minghan ; Duan Chunhua ; High Temperature Materials Research Division ; Central Iron and Steel Research Institute ; Special Materials Devision ; Pangang Group Jiangyou Changcheng Special Steel Co. ; Ltd.
- 年：2015
- 作者机构：钢铁研究总院高温材料研究所;攀钢集团江油长城特钢特种材料事业部;
- 论文关键词：高强耐蚀GH4925合金 ; 显微组织 ; 力学性能 ; 海洋环境
- 英文论文关键词：corrosion-resistant alloy GH4925 with high strength ; microstructures ; mechanical properties ; marine environments
- 会议召开时间：2015-05-20
- 会议录名称：第十三届中国高温合金年会论文集
- 英文会议录名称：Proceedings of the 13th China Superalloys Conference
- 语种：中文
- 分类号：TG133.4
- 学会代码：ZGJS
- 会议名称：第十三届中国高温合金年会
- 会议地点：中国北京
- 主办单位：中国金属学会高温材料分会
- 学会名称：中国金属学会
- 页数：5
- 文件大小：2456k
- 原文格式：O
- 会议级别：全国
摘要
研究了海洋环境用新型高强耐蚀GH4925合金在不同成分及热处理条件下的显微组织及力学性能。结果表明:经固溶+两级时效处理后,合金的析出相主要为球状γ′相、MC型碳化物、σ相及M_(23)C_6型碳化物;C、Al、Ti含量较高时,合金具有较高的强度和韧性,而塑性较低。采用735℃/炉冷+615℃/空冷的时效制度,有利于合金获得较高的强度以及良好的塑韧性。
The microstructures and mechanical properties of a new corrosion-resistant alloy GH4925 with high strength for marine environments of different chemical compositions and heat treated conditions were studied in this paper.The results show that the main precipitations of the alloy after solution annealing and two-stage age hardening treatment are spherical γ'phase,MC-type carbide,σ phase and M_(23)C_6-type carbide.Alloy with higher contents of C,Al and Ti has higher strength and toughness but lower ductility.The following age hardening treatment is preferably used to obtain the combination of higher strength and excellent ductility and toughness:aged at 735℃,hold,then FC to 6151,hold,AC.
The microstructures and mechanical properties of a new corrosion-resistant alloy GH4925 with high strength for marine environments of different chemical compositions and heat treated conditions were studied in this paper.The results show that the main precipitations of the alloy after solution annealing and two-stage age hardening treatment are spherical γ'phase,MC-type carbide,σ phase and M_(23)C_6-type carbide.Alloy with higher contents of C,Al and Ti has higher strength and toughness but lower ductility.The following age hardening treatment is preferably used to obtain the combination of higher strength and excellent ductility and toughness:aged at 735℃,hold,then FC to 6151,hold,AC.
引文
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[8]崔雨生,刘丽,等.铝和钛含量对镍基铸造高温合金性能的影响[J].钢铁研究学报,2003,15(7):244~248.
[9]李阳,李莎,等.固溶处理对GH4700镍基合金管组织及力学性能的影响[J].特殊钢,2013,34(3):64~66.
[10]SHARGHI-MOSHTAGHIN R,ASGARI S.The influence of thermal exposure on theγ'precipitates characteristics and tensile behavior of superalloy IN-738LC[J].Journal of Materials Processing Technology,2004,147(343~350):343~350.
[11]谢锡善,倪克仕,等.铁基高温合金中μ相和σ相引起的晶界脆化[J].金属学报,1981,17(1):1~9.
[2]郭婧,耿志宇,等.镍基耐蚀825合金的组织特征及热力学计算[J].稀有金属材料与工程,2012,41(11):1929~1934.
[3]Ganesan P,Clatworthy E F,et al.Development of a time-temperature-transformation diagram for alloy 925[J].Corrosion,1988,44(11):827~835.
[4]Mcoy S A,Puckett B C,et al.High performance age hardenable nickel alloys solve problems in sour oil and gas service[J].Edited by WARD J E,Corrotherm International Ltd.
[5]Lemke T F,Harris J A.High-alloy materials for offshore applications[C]//Offshore Technology Conference,Houston,Texas,1983:71~72.
[6]Mannan S,Hibner E,et al.Physical metallurgy of alloys718,725,725 HS,925 for service in aggressive corrosive environments[J].Corrosion 2003,Paper No.03126;1~12.
[7]Hibner E L,Shoemaker L.A new generation of high strength,corrosion-resistant superalloy products for marine fasteners and hardware-a summary report[J].Corrosion2004,Paper No.04287:1~17.
[8]崔雨生,刘丽,等.铝和钛含量对镍基铸造高温合金性能的影响[J].钢铁研究学报,2003,15(7):244~248.
[9]李阳,李莎,等.固溶处理对GH4700镍基合金管组织及力学性能的影响[J].特殊钢,2013,34(3):64~66.
[10]SHARGHI-MOSHTAGHIN R,ASGARI S.The influence of thermal exposure on theγ'precipitates characteristics and tensile behavior of superalloy IN-738LC[J].Journal of Materials Processing Technology,2004,147(343~350):343~350.
[11]谢锡善,倪克仕,等.铁基高温合金中μ相和σ相引起的晶界脆化[J].金属学报,1981,17(1):1~9.