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The Preparation and Study of Interface Structure of Mo2FeB2 Cermets-steel Cladding Materials

Author: RaoXiaoLin
Tutor: PanYingJun
School: Wuhan University of Science and Technology
Course: Plasma Physics
Keywords: Vacuum liquid phase sintering Mold Cermet Cladding material
CLC: TG174.453
Type: Master's thesis
Year: 2010
Downloads: 51
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Abstract


Sustained and rapid development of high-tech and industrial modernization , machinery and equipment components to withstand the harsh conditions of work of high-speed , high-temperature , high-pressure , heavy-duty , corrosion media . The destruction of the parts from the surface , and the surface of the partial destruction of the entire part failure . Physical and chemical properties of the metal material surface hardness , wear resistance , corrosion resistance , heat resistance and oxidation resistance , etc. have a decisive role. Cladding material with a very small amount of material from the role played by the expensive materials , while dramatically reducing the cost of the product , to improve product quality , and extend the service life , the purpose of saving resources and energy . This article using vacuum liquid phase sintering and Casting prepared Mo2FeB2 metal ceramic - steel cladding material by metallographic observation , microhardness test , SEM and EDS analysis , focus on the organization of the interface of the cladding material obtained by these two methods structure, while analysis of the impact of the heat treatment of vacuum liquid phase sintering the cermet prepared Mo2FeB2 - steel cladding material microstructure , and the related mechanism . The main conclusions are : ( 1 ) vacuum liquid phase sintering method and the method of casting can be prepared interface to combine good Mo2FeB2 cermet - steel cladding material ; ( 2 ) vacuum liquid phase sintering prepared Mo2FeB2 metal ceramic - steel cladding material ( 3 ) the ceramics of the casting prepared Mo2FeB2 metal - steel cladding materials interface , when the heating rate of 6 ~ 10 ℃ / min, the final sintering temperature is 1240 ℃ , get Mo2FeB2 cermet - steel cladding material microstructure and properties ; organization coarse grain wide transition layer between the the steel and Mo2FeB2 cermet embedded metallurgical combine ; ( 4 ) twice normalizing a normalized quenching can improve the vacuum liquid phase sintering the prepared Mo2FeB2 cermet - organization of steel cladding material , the refinement of the crystal grains of steel , improve the microhardness of the coating and the steel , to reduce the width of the transition layer .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Corrosion control and protection > Metal surface protection technology > Inorganic complex layer of protection > Ceramic stratified
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