Abstract: A multi-mode switchable car includes a car body, a bogie, a wheel assembly, a steering driving module, a steering locking structure and a locking sensing structure. The car body is provided with a control module, and multiple wheel driving programs are preset. The bogie is rotatably connected to the car body. The wheel assembly includes a hub motor connected to the bogie or the car body and a wheel-type component detachably connected to the hub motor, wheel forms are switchable by connecting different wheel-type components to the hub motor. The steering driving module drives the bogie. The steering locking structure locks the bogie when located in a locking position. The locking sensing structure acquires a position of the steering locking structure and is electrically connected with the control module, and the control module switches the wheel driving programs according to position information acquired by the locking sensing structure.

Abstract: A method for producing a silicon steel normalizing substrate comprises steelmaking, hot rolling and normalizing steps. A normalizing furnace is used in the normalizing step, and along a moving direction of strip steel, the normalizing furnace sequentially comprises: a preheating section, a nonoxidizing heating section, a furnace throat, furnace sections for subsequent normalizing processing, and a delivery seal chamber. Furnace pressures of the normalizing furnace are distributed as follows: the furnace pressure of a downstream furnace section adjacent to the furnace throat along the moving direction of the strip steel is the highest, the furnace pressure decreases gradually from the furnace section with the highest furnace pressure to a furnace section in an inlet direction of the normalizing furnace, and the furnace pressure decreases gradually from the furnace section with the highest furnace pressure to a furnace section in an outlet direction of the normalizing furnace.

Abstract: A cold-rolling method for preventing fracture of high-silicon strip steel, characterized in that the high-silicon strip steel has a Si content ?2.3 wt %, and at the beginning of cold-rolling, the temperature of inlet strip steel is above 45° C.; during the cold-rolling process, an emulsion liquid is sputtered to the strip steel, a flow rate of the emulsion liquid is 3500 L/min at the inlet in rolling direction, a flow rate of the emulsion liquid is 1500-4000 L/min at an outlet in the rolling direction, and the temperature of the strip steel is maintained above 45° C. under the precondition to guarantee technological lubrication. The cold-rolling method of the invention might prevent fracture of a head portion and a tail portion of the strip steel, raise the rate of finished products, and increase production efficiency.

Abstract: A method for producing a silicon steel normalizing substrate comprises steelmaking, hot rolling and normalizing steps. A normalizing furnace is used in the normalizing step, and along a moving direction of strip steel, the normalizing furnace sequentially comprises: a preheating section, a nonoxidizing heating section, a furnace throat, furnace sections for subsequent normalizing processing, and a delivery seal chamber. Furnace pressures of the normalizing furnace are distributed as follows: the furnace pressure of a downstream furnace section adjacent to the furnace throat along the moving direction of the strip steel is the highest, the furnace pressure decreases gradually from the furnace section with the highest furnace pressure to a furnace section in an inlet direction of the normalizing furnace, and the furnace pressure decreases gradually from the furnace section with the highest furnace pressure to a furnace section in an outlet direction of the normalizing furnace.

Abstract: A cold-rolling method for preventing fracture of high-silicon strip steel, characterized in that the high-silicon strip steel has a Si content ?2.3 wt %, and at the beginning of cold-rolling, the temperature of inlet strip steel is above 45° C.; during the cold-rolling process, an emulsion liquid is sputtered to the strip steel, a flow rate of the emulsion liquid is 3500 L/min at the inlet in rolling direction, a flow rate of the emulsion liquid is 1500-4000 L/min at an outlet in the rolling direction, and the temperature of the strip steel is maintained above 45° C. under the precondition to guarantee technological lubrication. The cold-rolling method of the invention might prevent fracture of a head portion and a tail portion of the strip steel, raise the rate of finished products, and increase production efficiency.