CRH train is famous for its high speed and punctuality. To reduce the body weight, its carriage is mainly made of aluminum alloy and stainless steel. Abrasive product for cutting and polishing soft metal is hugely demanded in the manufacturing process. The special cutting disc for soft metal should prevent slow cutting or unable cutting by air hole blocking in the metalworking process, maximize the friction and sharpness. We specially customized the right cutting disc after research, sampling and testing on the required work piece, lowering the cost greatly compared with that of diamond blade.