Abstract: A thermal spraying device includes an electric arc spraying device, a rotatable worktable, spraying tools, wire placing racks and a master controller. The electric arc spraying device is arranged at a periphery of a rotatable worktable, the spraying tools are arranged on the rotatable worktable in a circumference direction, and each of the spraying tools is driven to rotate by a motor. The wire placing racks are arranged at an outside of the rotatable worktable, and each of the wire placing racks corresponds to one electric arc spraying device. The master controller is connected to the rotatable worktable to control the rotatable worktable. Compared with a handheld electric arc spraying gun, the spraying efficiency and the stability of the spraying quality are improved. A thermal spraying device having the electric arc spraying device is further provided.

Abstract: A cylinder liner with high strength and wear resistance and a manufacturing method thereof. The composition (% by mass) of the cylinder liner is as follows: C: 3.0-3.3%, Si: 2.0-2.3%, P: 0.3-0.6%, S: <0.1%, Mn: 0.3-0.6%, Mo: 0.1-0.3%, Nb: 0.08-0.15%, and the balance Fe. The structure of the cylinder liner is phosphorus-containing acicular ferrite and carbon-rich austenite, wherein the phosphide eutectic is no less than 3%. The cylinder liner has a hardness of HRC38-43, Rm>400 MPa, high strength and good wear resistance, solves the problem of pearlite cylinder liner with low wear resistance and cast bainite with bad corrosion resistance.

Abstract: A cylinder liner with high strength and wear resistance and a manufacturing method thereof. The composition (% by mass) of the cylinder liner is as follows: C: 3.0-3.3%, Si: 2.0-2.3%, P: 0.3-0.6%, S: <0.1%, Mn: 0.3-0.6%, Mo: 0.1-0.3%, Nb: 0.08-0.15%, and the balance Fe. The structure of the cylinder liner is phosphorus-containing acicular ferrite and carbon-rich austenite, wherein the phosphide eutectic is no less than 3%. The cylinder liner has a hardness of HRC38-43, Rm>400 MPa, high strength and good wear resistance, solves the problem of pearlite cylinder liner with low wear resistance and cast bainite with bad corrosion resistance.