The present invention mainly relates to the technical field of extruding, rolling and drawing metal wire or rod, in particular to a method for rolling metal wire or rod with assistance of combined static magnetic field, characterized in that, a combined static magnetic field is applied before and during extrusion and pulling of a metal wire or rod. A specific method is: providing, in a moving direction of a metal wire or rod, a gradient static magnetic field generated by a combination of a permanent magnet and a steady electromagnet; and after a raw material for rolling the metal wire or rod is processed by the gradient static magnetic field, performing rolling extrusion and pulling on the material. For multiple passes of rolling extrusion and pulling, the static magnetic field processing is performed before each pass of rolling. By means of the method, the deformation resistance of the material is significantly reduced, defects of rolling are decreased, the size accuracy and uniformity of finished products is high, and the mechanical properties, especially strength and toughness, of the material are enhanced, thereby realizing the reinforcement of both the strength and toughness of the material.

The present invention mainly relates to the technical field of extruding, rolling and drawing metal wire or rod, in particular to a method for rolling metal wire or rod with assistance of combined static magnetic field, characterized in that, a combined static magnetic field is applied before and during extrusion and pulling of a metal wire or rod. A specific method is: providing, in a moving direction of a metal wire or rod, a gradient static magnetic field generated by a combination of a permanent magnet and a steady electromagnet; and after a raw material for rolling the metal wire or rod is processed by the gradient static magnetic field, performing rolling extrusion and pulling on the material. For multiple passes of rolling extrusion and pulling, the static magnetic field processing is performed before each pass of rolling. By means of the method, the deformation resistance of the material is significantly reduced, defects of rolling are decreased, the size accuracy and uniformity of finished products is high, and the mechanical properties, especially strength and toughness, of the material are enhanced, thereby realizing the reinforcement of both the strength and toughness of the material.

A manufacturing method of precision machine tool bearing with high precision stability includes the procedures: (1) microstructural stabilization of bearing body: by cold ring rolling, two liquid quenching, ultrasonic assisted multiple cryo-tempering treatment and stress ageing treatment, the bearing body with high microstructure stability can be obtained; (2) precision machining; (3) internal stress relaxation of bearing body: after precision machining, by executing magnetic treatment on the bearing body, bearing ring with high microstructure stability and low internal stresses can be obtained; and (4) bearing assembly: finally precision machine tool bearing with high precision stability can be obtained. Considering that the critical factors affecting the precision stability of bearing is the degree of microstructure stability and internal stresses, by improving the microstructure stability and reducing residual stress in multistage manufacture phase, precision stability of precision machine tool bearing should be promoted.