ASIMCO Shuanghuan Piston Ring obtains Chinese patent for invention  [ China ]

ASIMCO Shuanghuan Piston Ring Co., Ltd. (Yizheng), a subsidiary of ASIMCO Technologies, announced that its multilayer, multi-element composite hard PVD coating technology for piston rings has obtained a Chinese patent for invention. The technology uses multi-arc ion vacuum coating to form evaporated PVD layers on steel or cast iron piston rings. PVD coated piston rings achieve lower friction co...