Abstract: An exemplary metallic cover (20) includes a bottom base (21) and a plurality of side walls (22, 23, 24, 25). The side walls extend from bottom base. The bottom base and each of the side walls are connected by an edge structure (26). The metallic cover is made of a metallic material that has a yield strength in the range from about 80 MPa to about 150 MPa, an elongation ratio in the range from about 15% to about 28%, and a hardness in the range from about 45 HV0.2 to about 70 HV0.2. A method for making the metallic cover is also provided.

Abstract: A method for fabricating a composition of Zr-rich bulk amorphous alloy includes providing a weld member and a base, both made of Zr-rich bulk amorphous alloy, and welding the weld portion of the weld member to the base by a pulsed laser in a protective gas environment. A maximum power of the pulsed laser exceeds or equals 3.5 kW, and a welding rate exceeds 2 mm/sec.

Abstract: A method of surface grinding a Zr-rich bulk amorphous alloy article includes providing a substrate; providing a first surface grinder for rough surface grinding; and providing a second surface grinder for finish surface grinding. During the rough surface grinding, the rotating speed is in the range from 20 r/min to 30 r/min, the grinding time period is from 3 minutes to 12 minutes, and the grinding pressure is from 1 kg/cm2 to 2 kg/cm2, and a first pump circularly conveys a first lubricant to a first rotating abrasive wheel. During the finish surface grinding, the rotating speed is in the range from 30 r/min to 40 r/min, the grinding time period is from 5 minutes to 7 minutes, and the grinding pressure is from 1 kg/cm2 to 2 kg/cm2, and a second pump circularly conveys a second lubricant to a second rotating abrasive wheel.

Abstract: A method of surface grinding a Zr-rich bulk amorphous alloy article includes providing a substrate; providing a first surface grinder for rough surface grinding; and providing a second surface grinder for finish surface grinding. During the rough surface grinding, the rotating speed is in the range from 20 r/min to 30 r/min, the grinding time period is from 3 minutes to 12 minutes, and the grinding pressure is from 1 kg/cm2 to 2 kg/cm2, and a first pump circularly conveys a first lubricant to a first rotating abrasive wheel. During the finish surface grinding, the rotating speed is in the range from 30 r/min to 40 r/min, the grinding time period is from 5 minutes to 7 minutes, and the grinding pressure is from 1 kg/cm2 to 2 kg/cm2, and a second pump circularly conveys a second lubricant to a second rotating abrasive wheel.

Abstract: A method of cutting bulk amorphous alloy includes: positioning a target cutting path of the bulk amorphous alloy in an atmosphere of an inert gas; cutting the target cutting path to form a cut surface using a pulsed laser; and removing a plurality of burrs located on the cut surface produced during the cut.

Abstract: A method for fabricating a composition of Zr-rich bulk amorphous alloy includes providing a weld member and a base, both made of Zr-rich bulk amorphous alloy, and welding the weld portion of the weld member to the base by a pulsed laser in a protective gas environment. A maximum power of the pulsed laser exceeds or equals 3.5 kW, and a welding rate exceeds 2 mm/sec.

Abstract: An exemplary screen printing device includes a blade, a rotatable connecting element, a lower baffle, and an adjusting element. The rotatable connecting element is fixed to the blade. The lower baffle rotatably connects with the rotatable connecting element. The lower baffle and the blade cooperatively define a chamber for receiving ink therebetween. The adjusting element is connected to the rotatable connecting element. The adjusting element is capable of making the lower baffle rotate thereby opening a bottom of the chamber.

Abstract: An exemplary screen printing device includes a blade, a rotatable connecting element, a lower baffle, and an adjusting element. The rotatable connecting element is fixed to the blade. The lower baffle rotatably connects with the rotatable connecting element. The lower baffle and the blade cooperatively define a chamber for receiving ink therebetween. The adjusting element is connected to the rotatable connecting element. The adjusting element is capable of making the lower baffle rotate thereby opening a bottom of the chamber.

Abstract: An exemplary metallic cover (20) includes a bottom base (21) and a plurality of side walls (22, 23, 24, 25). The side walls extend from bottom base. The bottom base and each of the side walls are connected by an edge structure (26). The metallic cover is made of a metallic material that has a yield strength in the range from about 80 MPa to about 150 MPa, an elongation ratio in the range from about 15% to about 28%, and a hardness in the range from about 45 HV0.2 to about 70 HV0.2. A method for making the metallic cover is also provided.