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laser Powder Deposition of a Fe-Ni-Cr Superalloy:Analysis of Microstructure Formation and Mechanical Properties

稀有金属材料与工程 2011年第S4期40卷 283-287页

作者： huang jian,nie pulin,{2.,{3.,li zhuguo,wu yixiong shanghai key laboratory of materials laser processing and modification,school of materials Science and Engineering,shanghai jiao tong university,shanghai 2.02.0,china shanghai jiao {2. Univ Shanghai Key Lab Mat Laser Proc & Modificat Sch Mat Sci & Engn Shanghai 200240 Peoples R China

laser powder deposition (LPD) is a very promising repair technique for gas turbine components,which injects the melted powder into the surface of the part and forms the clad with designed *** this paper Fe-Ni-Cr powder is deposited by LPD,and heat treatment is subsequently employed for optimizing the microstructure and improving the mechanical properties of the as-deposited *** microstructure of the as-deposited clad consists of Nb bearing Laves phase and γ austenite *** phase γ'' can be precipitated by post heat treatment for increasing the mechanical *** the existence of Laves phase weakens the mechanical properties of the clad,even inducing the hot ***,DTA results show liquation reaction of Laves phase is as high as 1141 ℃.The solution treatment under 980 ℃ hardly dissolves the Laves *** is needed to control the precipitation of Laves phase by further work.

关键词： Fe-Ni-Cr superalloy laser powder deposition (LPD) strengthening phase Laves phase

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Investigation on High Power Diode laser Cladding of Ni-Fe-Cr Based Alloy Coatings

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稀有金属材料与工程 2012年第S1期41卷 199-202页

作者： zhang yaocheng jian, {2. {3. liu honggang li zhuguo wu yixiong shanghai jiao {2. Univ Shanghai Key Lab Mat Laser Proc & Modificat Shanghai 200240 Peoples R China

Appropriate laser cladding processing parameters for a Ni-Fe-Cr based alloy coating with good qua{2.ty were studied using 3.5 kW diode *** characterization of the coating was investigated,and the influence of each parameter was *** mechanical properties and wear resistance of the coating were compared with the corresponding chemical composition wrought and cast *** results showed that a coating with aspect ratio about 3.dilution ratio 8%-10%and wetting angle 3.o-50°could be formed with the laser power 12.0-1500 W,travel{2.ng speed 8-10 mm/s,powder feed rate 16-18 g/min and shield gas flow 15 l/*** tensile strength of the coating reached 953.MPa which was higher than that of wrought material 918 MPa and cast material 83. *** microhardness of multi-layer coating was higher than that of single layer *** wear resistance of the coating was at the same level with the wrought and cast materials.

关键词： Ni-Fe-Cr based alloy coating processing parameter mechanical property

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