METHOD FOR PREPARING SINTERED METAL MATRIX DIAMOND SAW BLADE USED FOR CUTTING QFN PACKAGING DEVICE

摘要

The invention provides a method for preparing a sintered metal matrix diamond saw blade used for cutting a QFN packaging device which comprises the following steps: preparing metal matrix by using metal powder and inorganic filler; wet-mixing and stirring the metal matrix; adding diamond grains to obtain a mixed material with evenly distributed diamond grains; preforming the mixed material through cold pressing; preparing a sintered metal matrix diamond saw blade blank through hot-pressing sintering; and finally machine-shaping the sintered metal matrix diamond saw blade blank to meet the dimensional requirements. The firm interface metallurgical bond is formed between the metal matrix and the diamond grains by means of the hot-pressing sintering process, which enhances the holding force of the metal matrix on the diamond grains, and enables abrasive grains not easy to fall off untimely in the cutting process, thus prolonging the service life of the sintered metal matrix diamond saw blade.