CN105555988A - 蠕变增强材料对耐热金属材料构件的扩散渗镀方法以及增强了蠕变强度的耐热金属材料构件 - Google Patents
蠕变增强材料对耐热金属材料构件的扩散渗镀方法以及增强了蠕变强度的耐热金属材料构件 Download PDFInfo
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Abstract
对使用耐热金属材料制造的耐热金属材料构件的表面涂布或喷镀含有选自B、W、Cr、Mo、Nb、V、Hf、Zr、Ti、Cu和Co中的一种或多种元素的蠕变增强材料,以与涂布或喷镀有所述蠕变增强材料的部分接触的方式,用耐热被覆构件包覆、固定该部分,通过将由所述耐热被覆构件包覆的所述耐热金属材料构件加热至1000℃以上的温度,从而对向外周方向热膨胀的耐热金属材料构件产生压缩力,能够在抑制耐热金属材料构件向外周方向的热膨胀的同时,使在耐热金属材料构件表面上的蠕变增强材料有效地向耐热金属材料构件的内部扩散渗镀。
Description
技术领域
本发明涉及蠕变增强材料对耐热金属材料构件的扩散渗镀方法以及利用该方法增强了蠕变强度的耐热金属材料构件。
背景技术
以往,作为增强耐热金属材料的蠕变特性的方法,开发了如下方法,即例如将与蠕变强度和/或疲劳强度有关的晶界强化材料涂布或喷镀以形成被膜,在预定温度加热预定时间的方法(日本专利第3793966号公报)等。
发明内容
发明所要解决的课题
本发明的目的在于,提供能够使增强蠕变强度的材料(以下,称为“蠕变增强材料”)向采用耐热金属材料制造的构件(以下,称为“耐热金属材料构件”)的内部有效地扩散渗镀的方法以及利用该方法增强了蠕变强度的耐热金属材料构件。
用于解决课题的方法
为了解决上述课题,本发明所涉及的蠕变增强材料对耐热金属材料构件的扩散渗镀方法以及利用该方法增强了蠕变强度的耐热金属材料构件具备后述构成。更具体地,本发明为以下等方案:
(1)一种蠕变增强材料对耐热金属材料构件的扩散渗镀方法,特征在于,包括:对耐热金属材料构件的表面涂布或喷镀蠕变增强材料,以与涂布或喷镀有所述蠕变增强材料的部分接触的方式用耐热被覆构件包覆、固定该部分,将由所述耐热被覆构件包覆后的所述耐热金属材料构件加热至1000℃以上的温度;所述蠕变增强材料含有选自B、W、Cr、Mo、Nb、V、Hf、Zr、Ti、Cu和Co中的1种或多种元素;
(2)上述(1)所述的方法,其特征在于,将由所述耐热被覆构件包覆的所述耐热金属材料构件加热至1000℃以上的温度后,进行冷却,再次加热至A1相变点以上的温度;
(3)增强了蠕变强度的耐热金属材料构件,其特征在于,通过对耐热金属材料构件的表面涂布或喷镀蠕变增强材料,以与涂布或喷镀有所述蠕变增强材料的部分接触的方式用耐热被覆构件包覆、固定该部分,将由所述耐热被覆构件包覆的所述耐热金属材料构件加热至1000℃以上的温度而得到,所述蠕变增强材料含有选自B、W、Cr、Mo、Nb、V、Hf、Zr、Ti、Cu和Co中的1种或多种元素;
(4)上述(3)所述的耐热金属材料构件,通过将由所述耐热被覆构件包覆的所述耐热金属材料构件加热至1000℃以上的温度后,进行冷却,再次加热至A1相变点以上的温度而得到。
发明效果
根据本发明,可提供能够使蠕变增强材料向耐热金属材料构件的内部有效地扩散渗镀的方法以及利用该方法增强了蠕变强度的耐热金属材料构件。
附图说明
图1为表示作为本发明的一个实施方式而说明的使蠕变增强材料向耐热金属材料构件内部扩散渗镀的方法的概略的图。
图2为表示作为本发明的一个实施方式而说明的图1的概略图的剖面的图。
具体实施方式
以下,针对本发明的优选的实施方式,参照附图而详细地说明。予以说明的是,通过本说明书的记载,本发明的目的、特征、优点以及其想法对于本领域技术人员而言是明确的,并根据本说明书的记载,如果是本领域技术人员就能够容易地再现本发明。以下所记载的发明的实施方式和附图等表示本发明的优选的实施方式,其为了例示或说明而显示,而并非将本发明限定于它们。基于本说明书的记载,可在本说明书中所公开的本发明的意图以及范围内进行各种修饰,这对于本领域技术人员而言是明确的。
图1为表示作为本发明的一个实施方式而说明的使蠕变增强材料向耐热金属材料构件内部扩散渗镀的方法的概略的图。图2为表示作为本发明的一个实施方式而说明的图1的概略图的剖面的图。予以说明的是,本实施方式中,作为耐热金属材料构件10,例举采用耐热金属材料而制造的、已经铺设的(包含修补后的材料)或者未使用的或劣化的高温管材而进行说明,但不限于此,耐热金属材料构件10也可以是采用耐热金属材料而制造的、已经铺设的(包含修补后的材料)或者未使用的或劣化的涡轮等其他高温用构件等。
如图1和图2所示,本发明所涉及的使蠕变增强材料向耐热金属材料构件10的内部扩散渗镀的方法中,首先,对耐热金属材料构件10的表面涂布或喷镀蠕变增强材料。然后,以与涂布或喷镀有蠕变增强材料的部分25接触的方式用耐热被覆构件30包覆该部分25,并固定耐热被覆构件30。接着,通过加热器40将由耐热被覆构件30包覆的耐热金属材料构件10在1000℃以上的温度加热预定时间。
如上所述,通过将涂布或喷镀有蠕变增强材料的耐热金属材料构件10用耐热被覆构件30包覆并加热至1000℃以上的温度,从而对向外周方向热膨胀的耐热金属材料构件产生压缩力,抑制耐热金属材料构件向外周方向的热膨胀,同时能够使在耐热金属材料构件10的表面的蠕变增强材料向耐热金属材料构件10的内部有效地扩散渗镀。因此,在耐热金属材料构件10为劣化构件或已经铺设的构件的情况下,可利用耐热金属材料构件10向外周方向的热膨胀力,有效地修补耐热金属材料构件10、其焊接部20中的蠕变空洞、龟裂,能够实现耐热金属材料构件10、其焊接部20的修复,进而能够在恢复耐热金属材料构件10、其焊接部20的组织,并实现耐热金属材料构件10、其焊接部20的组织强化。据此,能够提高蠕变强度以延长寿命至新材料以上。另一方面,在耐热金属材料构件10为未使用构件的情况下,能够实现耐热金属材料构件10、其焊接部20的组织强化,据此,能够提高蠕变强度以延长寿命至新材料以上。
本发明所涉及的使蠕变增强材料向耐热金属材料构件10的内部扩散渗镀的方法中,可在对耐热金属材料构件10表面涂布或喷镀蠕变增强材料之前,对所要涂布或喷镀蠕变增强材料的部分25进行蚀刻处理,或施加喷丸并进行蚀刻处理。通过这些处理,能够利用塑性变形对耐热金属材料构件10的表层进行加工硬化,或对耐热金属材料构件10的表面赋予压缩残余应力,或去除耐热金属材料构件10的表面的氧化膜。
此外,本发明所涉及的使蠕变增强材料向耐热金属材料构件10的内部扩散渗镀的方法中,可在通过加热器40将由耐热被覆构件30包覆的耐热金属材料构件10加热至1000℃以上的温度后,为了去除(减少)残余应力而进行应力消除、拉伸退火等处理。更具体地,还可以通过加热器40将由耐热被覆构件30包覆的耐热金属材料构件10加热至1000℃以上的温度后,先冷却至常温,再次在A1相变点以上的温度(优选为1000℃+10~100℃)加热预定时间(例如,几小时~24小时左右)。
进而,本发明所涉及的使蠕变增强材料向耐热金属材料构件10的内部扩散渗镀的方法中,为了约束在将涂布或喷镀有蠕变增强材料的耐热金属材料构件10用耐热被覆构件30包覆并通过加热器40加热时所产生的、耐热金属材料构件10在长度方向上向外(耐热金属材料构件10的端部方向)的热膨胀,也可以例如利用2个夹具等,以夹着通过加热器40加热的部分的方式将未通过加热器40加热的部分的耐热金属材料构件10固定。
予以说明的是,在通过加热器40加热的部分相对于耐热金属材料构件10的整体小的情况下,通过加热器40加热的部分的、耐热金属材料构件10在长度方向上向外的热膨胀被未通过加热器40加热的部分约束,因此无需利用夹具等将未通过加热器40加热的部分的耐热金属材料构件10固定。
作为构件10的耐热金属材料,可举出例如0.3Mo钢、0.5Mo钢、0.5Cr-0.5Mo钢、1Cr-0.2Mo钢、1Cr-0.5Mo钢、1.25Cr-0.5Mo钢、2.25Cr-1Mo钢、5Cr-0.5Mo钢、7Cr-0.5Mo钢、9Cr-1Mo钢、0.3Cr-Mo-V钢、0.5Cr-Mo-V钢、9Cr-Mo-V钢、12Cr-Mo-V钢、1Cr-1.25Mo-0.25V钢、9Cr-1Mo-W钢、SUS304、SUS304L、SUS316、SUS316L、SUS316TI、SUS317、SUS321、SUS347H、SUS310S、Super304、SUS904L、NCF600、NCF601、NCF800、NCF800H等,但不限于这些,可应用在火力、原子能发电设备、其他高温工厂中所采用的构件的公知材料。
作为蠕变增强材料,只要是熔点为1000℃以上且通过加热至1000℃以上的温度而产生析出强化、固溶强化,从而能够使蠕变强度增强的元素,就没有特别限制,但根据耐热金属材料构件10的原材料,可包含例如从B(硼)、W(钨)、Cr(铬)、Mo(钼)、Nb(铌)、V(钒)、Hf(铪)、Zr(锆)、Ti(钛)、Cu(铜)和Co(钴)中适宜地选择的一种或多种元素。在将蠕变增强材料涂布于耐热金属材料构件10的表面的情况下,可直接使用蠕变增强材料的粉末,也可使用通过粘合剂、溶剂、粘接剂等制成液状或糊状的蠕变增强材料的涂布剂。此外,在将蠕变增强材料喷镀于耐热金属材料构件10的表面的情况下,例如,可使用蠕变增强材料粉末应用等离子体喷镀法等公知的喷镀方法。予以说明的是,关于对耐热金属材料构件10表面的蠕变增强材料的涂布或喷镀,可如本实施方式那样对耐热金属材料构件10的外周整体的表面进行,也可对耐热金属材料构件10的一部分表面进行。
关于耐热被覆构件30,只要由能够以与涂布或喷镀有蠕变增强材料的部分25接触的方式包覆该部分25、并抑制在加热至上述加热温度时产生的处于该部分25的耐热金属材料构件10向外周方向的热膨胀且能够几乎保持该部分25中的耐热金属材料构件10的形状的耐热材料构成,就没有特别限制,但优选由在上述加热温度以上的温度下,热膨胀率比耐热金属材料构件10低的材料构成。予以说明的是,在耐热被覆构件30由与耐热金属构件10相比热膨胀率为相同程度且是不同于耐热金属材料构件10的耐热材料、或热膨胀率比耐热金属材料构件10高的耐热材料构成的情况下,也可为了抑制在加热至上述加热温度时产生的耐热被覆构件30的热膨胀,通过在上述加热温度以上的温度下的热膨胀率比耐热金属材料构件10低的耐热材料构件来固定耐热被覆构件30的外周,保持耐热被覆构件30的形状。
作为耐热被覆构件30的耐热材料,可举出例如氧化铝、氧化锆、氮化铝、碳化硅、氮化硅、堇青石、塞隆、锆英石、莫来石等陶瓷、Alloy903、Alloy909、HRA929等合金等。
耐热被覆构件30呈例如绳、板、夹具等的形状,关于它们的固定,例如,可通过将绳状、板状的耐热被覆构件30对涂布或喷镀有蠕变增强材料的部分25中的耐热金属材料构件10的外周来进行,也可通过将夹具状的耐热被覆构件30安装于涂布或喷镀有蠕变增强材料的部分25中的耐热金属材料构件10的外周来进行,还可通过利用夹具、螺栓等固定具将呈板等形状的耐热被覆构件30安装于涂布或喷镀有蠕变增强材料的部分25中的耐热金属材料构件10的外周来进行。予以说明的是,本实施方式中,耐热被覆构件30由具有2个略半圆弧剖面形状的金属配件构成,通过安装于这些金属配件的凸缘的螺栓构件35,以所述金属配件的内面与涂布或喷镀有蠕变增强材料部分25中的耐热金属材料构件10的外周接触的方式将耐热被覆构件30固定于耐热金属材料构件10的表面。所述螺栓构件35由例如与耐热被覆构件30相同的材料制造。
关于涂布或喷镀有蠕变增强材料的耐热金属材料构件10的加热温度,只要是1000℃以上的温度就没有特别限制,但优选在构件10的耐热金属材料和蠕变增强材料中A3相变点最高的成分的A3相变点以上的温度(优选为1000℃+10~100℃)加热预定时间(例如,几小时~24小时左右)。予以说明的是,本实施方式中,作为加热装置,使用了能够从涂布或喷镀有蠕变增强材料的耐热金属材料构件10的外周加热的高频加热加热器40,但只要能够对涂布或喷镀有蠕变增强材料的部分25中的耐热金属材料构件10进行加热,就没有特别限制。
通过以上的方法,使蠕变增强材料在耐热金属材料构件10的内部扩散渗镀的材料,如上所述其蠕变强度被增强,因此作为增强了蠕变强度的耐热金属材料构件有用。
符号说明
10耐热金属材料构件
20焊接部
25涂布或喷镀有蠕变增强材料的部分
30耐热被覆构件
35螺栓构件
40高频加热加热器
Claims (4)
1.一种蠕变增强材料对耐热金属材料构件的扩散渗镀方法,其特征在于,包括:
对耐热金属材料构件的表面涂布或喷镀蠕变增强材料,
以与涂布或喷镀有所述蠕变增强材料的部分接触的方式用耐热被覆构件包覆、固定该部分,
将由所述耐热被覆构件包覆的所述耐热金属材料构件加热至1000℃以上的温度;
所述蠕变增强材料含有选自B、W、Cr、Mo、Nb、V、Hf、Zr、Ti、Cu和Co中的一种或多种元素。
2.如权利要求1所述的方法,其特征在于,将由所述耐热被覆构件包覆的所述耐热金属材料构件加热至1000℃以上的温度后,进行冷却,再次加热至A1相变点以上的温度。
3.一种增强了蠕变强度的耐热金属材料构件,其特征在于,
通过对耐热金属材料构件的表面涂布或喷镀蠕变增强材料,
以与涂布或喷镀有所述蠕变增强材料的部分接触的方式用耐热被覆构件包覆、固定该部分,
将由所述耐热被覆构件包覆的所述耐热金属材料构件加热至1000℃以上的温度而得到,
所述蠕变增强材料含有选自B、W、Cr、Mo、Nb、V、Hf、Zr、Ti、Cu和Co中的一种或多种元素。
4.如权利要求3所述的耐热金属材料构件,通过将由所述耐热被覆构件包覆的所述耐热金属材料构件加热至1000℃以上的温度后,进行冷却,再次加热至A1相变点以上的温度而得到。
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