退火处理对V-5Cr-5Ti合金微观组织和硬度的影响-IngentaConnect.PDFVIP

32 / 2 11 3 V- 5Cr- 5Ti Effect of Annealing on the Microstructure and Hardness of V-5Cr-5T i Alloy , , , , ( , 6219 ) HUANG Shu-ke, ZHOU Dan-chen, LI Chang-an, LI Jing-min, LIU Bao ( Institute of M achinery M anufacturing T echnology , China A cademy of Engineering Physics, Mianyang 6219 , Sichuan, China) : V-5Cr-5T i , , , X ( XRD) , ( SEM) ( OM) , V-5Cr-5Ti , 7 ~ 1 , , , 9 1 ; 11 , , : V-5Cr-5Ti; ; ; ; + : T G 146. 4 13 : A : 1 1-4381( 2 11) 3- 32- 4 Abstract: T he variations of hardness and microstructure w ith annealing temperature of V-5Cr-5Ti a-l loy, and the effect of minor impurity elements were studied. T he annealing w as done in vacuum heat treatment furnace. T he tensile deform and hardness w ere tested using universal material testing ma- chine and V ickers hardness tester. T he phase structure w as identified using X-ray diffraction ( XRD) . The microstructure w as observed using scanning electronic microscope ( SEM) and optical microscope ( OM) . The results indicated that the hardness of deformed V-5Cr-5T i alloy is improved obviously. The hardness decreases with annealing temperature increasing from 7 to 1 , and reach minimum value at 9 and 1 . After oil-quenching at 11 , the hardness is not descending but to higher value, and the microstructure is non-homogeneous w here some grains grow up abnor- mally. Key words: V-5Cr-5T i; annealing; microstructure; hardness; precipitation , , , V, Cr, T i , ,