Aging of a cast 35Cr-45Ni heat resistant alloy

被引：65

作者：

Sustaita-Torres, Ireri A. ^{[2
,3
]}

Haro-Rodriguez, Sergio ^{[2
]}

Guerrero-Mata, Martha P. ^{[3
]}

de la Garza, Maribel ^{[3
]}

Valdes, Eduardo ^{[4
]}

Deschaux-Beaume, Frederic ^{[5
]}

Colas, Rafael ^{[1
,3
]}

机构：

[1] Univ Autonoma Nuevo Leon, Ctr Innovac Invest & Desarrolo Ingn & Tecnol, Apodaca 66690, Mexico

[2] Univ Autonoma Zacatecas, Unidad Acad Ingn, Zacatecas 98000, Mexico

[3] Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, San Nicolas De Los Garza 66450, Mexico

[4] Inst Tecnol Saltillo, Saltillo 25280, Coahuila, Mexico

[5] Univ Montpellier 2, Mech & Civil Engn Labs, IUT Nimes, F-30907 Nimes, France

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2012年 / 133卷 / 2-3期

关键词：

Precipitation; Heat resisting cast alloys; Aging; Microstructural evolution; AUSTENITIC STAINLESS-STEELS; NB; MICROSTRUCTURE; CREEP; PRECIPITATION; ADDITIONS; HK-40; TUBES; TI;

D O I：

10.1016/j.matchemphys.2012.02.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructural evolution during aging and its effect on the mechanical properties of a centrifugally cast 35Cr-45Ni heat resistant alloy was studied by means of optical and electron microscopy, and by mechanical testing in samples aged in air at 750 degrees C for a period of time of up to 1000 h. The as-cast microstructure consisted of an austenitic matrix and a network of two types of primary carbides that were identified as NbC and M7C3 by their light and dark tones when viewed in backscattered electron mode in a scanning electron microscope. Aging promoted the occurrence of different phenomena such as the transformation of primary M7C3 to M23C6 carbides, precipitation of secondary M23C6 carbides and the transformation of NbC to Nb3Ni2Si. It was found that aging promoted an increase in Vickers microhardness of more than 50%, the increment in tensile strength of around 20% and the reduction in ductility of close to 70%. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：1018 / 1023

页数：6

共 26 条

[1]

ASTM International, 2009, E8 ASTM, DOI [10.1520/E0008_E0008M-09, DOI 10.1520/E0008_E0008M-09]

[2] ROLE OF NB IN MODIFYING THE MICROSTRUCTURE OF HEAT-RESISTANT CAST HP STEEL [J].

BARBABELA, GD ;

DEALMEIDA, LH ;

DASILVEIRA, TL ;

LEMAY, I .

MATERIALS CHARACTERIZATION, 1991, 26 (03) :193-197

[3]

de Almeida L.H., 1996, UNDERSTANDING MICROS, V24, P193

[4] Microstructural characterization of modified 25Cr-35Ni centrifugally cast steel furnace tubes [J].

de Almeida, LH ;

Ribeiro, AF ;

Le May, I .

MATERIALS CHARACTERIZATION, 2002, 49 (03) :219-229

[5] Method for predicting risk of cracking during weld repair of heat resistant cast steels [J].

Duchosal, A. ;

Deschaux-Beaume, F. ;

Bordreuil, C. ;

Fras, G. ;

Lours, P. .

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2008, 13 (02) :126-135

[6]

EBERT HW, 1976, WELD J, V55, P939

[7] Microstructural factors that determine the weldability of a high Cr-high SiHK 40 alloy [J].

Haro, S ;

López, D ;

Velasco, A ;

Viramontes, R .

MATERIALS CHEMISTRY AND PHYSICS, 2000, 66 (01) :90-96

[8]

HOU WT, 1985, MATER SCI TECH SER, V1, P385

[9]

HOU WT, 1985, MATER SCI TECH SER, V1, P390

[10]

IBANEZ RAP, 1993, MATER CHARACT, V30, P243, DOI 10.1016/1044-5803(93)90071-3

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