Role of Electroless Plating in the Production of W-Cu EDM Electrodes

چکیده مقاله

Tungsten copper W Cu electrodes have been used widely to machine die steel and tungsten carbide work pieces owing to high thermal conductivity of Cu, and the better spark erosion resistance, low thermal expansion coefficient and high melting temperature of W In present study, tungsten particles with average size of 8μm were used to electroless coating of Ni and Ni P The compacting pressure and sintering temperature were adjusted for powder to attain the desired skeleton density forproducing W 15Cu Then the skeletons were infiltrated with oxygen free copper at 1300 C in hydrogen As coated powder and compacts were characterized by EDS analysis, scanning electron microscopy SEM and optical microscopy Also measurement of density and electrical resistivity were performed Results showed, infiltration process improves in case of coated powders and higher values in density are observed In case of coated powders, relative density and electrical resistivity of compacts increase as the amount of Ni in coating increases to about 1%Wt In higher values of Ni relative density is approximately constant, but electrical resistivity increases as the amount of additive and P in composition increases

کلیدواژه‌ها

نویسندگان

M Amirjan

M Sc Student Malek e Ashtar university of Technology

N Parvin

Assistant Professor – Amir Kabir university of Technology

K Zangene

Assistant Professor Malek e Ashtar university of Technology

Amirjan, M and Parvin, N and Zangene, K,1386,Role of Electroless Plating in the Production of W-Cu EDM Electrodes,02nd Tehran International Congress on Manufacturing Engineering (TICME2007),Tehran

ارائه‌شده در

مجموعه مقالات دومین کنفرانس بین المللی و هشتمین کنفرانس ملی مهندسی ساخت و تولید10 اسفند 1386 · تهران