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个人中心收藏查看我的收藏0有用+10Nimonic90播报讨论上传视频时效强化钴镍基变形高温合金Nimonic90（中国牌号GH90，美国UNS No7090）是一种时效强化钴镍基变形高温合金，以钴、镍为主基体，含铬、钛、铝等强化元素，部分资料中归类为镍基合金 [2]。该合金属于高温合金类别，主要应用于航空航天领域，适用于制造涡轮发动机叶片、涡轮盘及高温紧固件等关键部件 [1]。该合金在815–870℃高温环境下具有优异的抗拉强度、抗蠕变能力及抗氧化性，同时耐腐蚀性良好，冷热交变疲劳强度高。其强化相主要为γ'-Ni3(Ti,Al)析出物，碳化物在晶界呈链状分布。加工时需控制锻造温度在1050–950℃区间以防止开裂，晶粒度与变形程度关联紧密，可采用惰性气体保护焊及闪光对焊工艺。典型应用场景包括航空发动机高温结构件与弹性元件制造。中文名Nimonic90
美    国：UNS No7090
英    国：Nimonic90
中    国：GH90

目录
1各国名称2特性3化学成份4物理性能5力学性能6金相组织结构7工艺要求
各国名称
播报编辑美国：UNS No7090英国：Nimonic90中国：GH90
特性
播报编辑该合金是时效强化钴镍基变形高温合金，该合金在815～870℃有较高的抗拉强度和抗蠕变能力、良好的抗氧化性和耐腐蚀、在冷热反复交替作用下有较高的疲劳强度以及良好的成形性和焊接性。用于涡轮发动机涡轮盘、叶片、高温紧固件、卡箍、密封圈及弹性元件等。
化学成份
播报编辑合金牌号%镍Ni钴Co铬Cr铁Fe锆Zr硼B碳C锰Mn硅Si硫S磷P铜Cu铝Al钛TiGH90最小余量15.018.0---------1.02.0最大21.021.01.50.150.020.130.40.80.0150.020.22.03.0
物理性能
播报编辑密度g/cm3熔点℃热导率λ/(W/m·℃)比热容J/kg·℃弹性模量GPa剪切模量GPa电阻率μΩ·m泊松比线膨胀系数a/10-6℃-18.2140021.76(100℃)-225---12.71(20~100℃)
力学性能
播报编辑(在20℃检测机械性能的最小值)热处理方式抗拉强度σb/MPa屈服强度σp0.2/MPa延伸率σ5 /%布氏硬度HBS固溶处理8205908-
金相组织结构
播报编辑该合金主要强化相是γ'-Ni3(Ti、Al),在晶内以大小不同的方形颗料关析出，在晶界上也可以见到这种形状的γ'相，碳化物在晶界上呈不连续的链状析出。
工艺要求
播报编辑1、合金在锻造时易产生内裂，允许重锤打击。钢锭装炉温度不高于700℃，低温区域先预热20-30分钟，最终加热温度1150℃-1180℃，开锻温度不低于1050℃，终锻温度不低于950℃。 　2、该合金的晶粒度平均尺寸与锻件的变形程度、终锻温度密切相关。3、合金在固溶状态可进行惰性气体保护钨极电弧焊及闪光对焊。新手上路成长任务编辑入门编辑规则本人编辑我有疑问内容质疑在线客服官方贴吧意见反馈投诉建议举报不良信息未通过词条申诉投诉侵权信息封禁查询与解封©2025 Baidu 使用百度前必读 | 百科协议 | 隐私政策 | 百度百科合作平台 | 京ICP证030173号 京公网安备11000002000001号window.PAGE_DATA= {"lemmaId":1590830,"lemmaTitle":"Nimonic90","lemmaDesc":"时效强化钴镍基变形高温合金","lemmaType":0,"uid":157679342,"uname":"shexin001","createTime":1313645727,"updateTime":1750136688,"isDefault":0,"isDeleted":0,"rank":1,"extData":{"isBaikeV6":1,"isFrontV6":1,"isSapp":0,"isWaitForPersonal":false,"kpdClassify":[{"id":337502,"name":"工业产品"}],"lemmaId":6312209,"lemma_id":6312209,"newEditor":1,"origAuditArea":90,"origCommandNo":13001003,"pass_count":16,"subLemmaId":6409115,"uip":"10.99.204.212","updateTime":1750136689,"wapEdit":0},"extFlag":0,"versionId":647135152,"versionUid":6863170617,"versionUname":"熵增青年","versionCreateTime":1750136684,"catalog":[{"level":1,"title":"各国名称","index":"1","uuid":"gnanw8a2n6","height":28},{"level":1,"title":"特性","index":"2","uuid":"gnanw80gcp","height":28},{"level":1,"title":"化学成份","index":"3","uuid":"gnanw80gfu","height":28},{"level":1,"title":"物理性能","index":"4","uuid":"gnanw80nm0","height":28},{"level":1,"title":"力学性能","index":"5","uuid":"gnanw8a66d","height":28},{"level":1,"title":"金相组织结构","index":"6","uuid":"gnanw80tdl","height":28},{"level":1,"title":"工艺要求","index":"7","uuid":"gnanw80tg3","height":28}],"abstract":[],"abstractAlbum":{"content":[{"albumId":1,"src":"6609c93d70cf3bc7f7b5a849d900baa1cc112ad9","width":750,"height":496,"uuid":"wap12ad9"}],"desc":"概述图册","total":1,"coverPic":{"albumId":1,"url":"https://bkimg.cdn.bcebos.com/pic/6609c93d70cf3bc7f7b5a849d900baa1cc112ad9?x-bce-process=image/resize,m_lfit,w_536,limit_1/quality,Q_70","src":"6609c93d70cf3bc7f7b5a849d900baa1cc112ad9","origSrc":"6609c93d70cf3bc7f7b5a849d900baa1cc112ad9","width":750,"height":496,"uuid":"wap12ad9"},"wapPic":{"src":"6609c93d70cf3bc7f7b5a849d900baa1cc112ad9","origSrc":"6609c93d70cf3bc7f7b5a849d900baa1cc112ad9","width":750,"height":496,"uuid":"h2q7djue2f"}},"reference":[{"type":1,"title":"【时效强化钴镍基变形高温合金Nimonic90镍基合金GH90耐热钢】图片","site":"中国供应商网","publishDate":"2025-05-26","index":1,"uuid":"i2i8vo8vd9","encodeUrl":"533aYdO6cr3_z3kATPKMz6nxZiqWYI6subzVUeFzzqIPmGapB43rFIs66dk-sPRpWxvCs9cxN4VNz7z_AkNEgfcOKaloHg"},{"type":1,"title":"【供应供应Nimonic90 时效强化型镍基变形高温合金图片】供应供应Nimonic90 时效强化型镍基变形高温合金图片大全 - 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