摘要:
Fuel gas compositions for use in metal fabrication are provided comprising fuel gases comprising a base fuel gas mixed with from about 1% to less than 30% hydrogen.
摘要:
This invention relates to a nozzle comprising a coupling portion (2), intended to be coupled to at least two hot gas outlets (11) of a welding tool (10), and a transition portion (3), connected to the coupling portion (2). The transition portion (3) has a first width (w31) in the connection between the transition portion (3) and the coupling portion (2), and has a second width (w32) in an end opposite to the connection between the transition portion (3) and the coupling portion (2), the second width (w32) being greater than the first width (w31).
摘要:
The present invention describes a portable device for monitoring and controlling the level of residual oxygen in reflow oven atmosphere (1). This referred equipment is able to determine the quality of the atmosphere of a reflow oven, using parameters predetermined by the user. Therefore, the equipment performs the monitoring of the reflow oven atmosphere (1) controlling the level of residual oxygen of the reflow oven (1) by increasing or decreasing of the feed flow rate of nitrogen by the control that the microcontroller exerts over the proportional valve of nitrogen flow control (9), by opening or closing the valves to kept such predetermined values.
摘要:
To prevent evaporated flux from being attached to rotation axes of motors which rotate fans positioned in a preheating zone, a main heating zone and a cooling zone and being solidified, the evaporated flux is efficiently and surely collected with the flux liquefying before the flux is solidified and having fluidity. A drain portion 20 constituting a flux collection apparatus 10A is formed at a side of a motor base 16 opposed to the fan and at a circumferential portion of the rotation axis 14. A surface of the drain portion 20 opposed to the fan is formed as an inclined surface 20A which is inclined from a level position of the motor base 16 to a discharge port 46 provided at a back side of the motor base 16. The flux collected to a center portion of the motor base 16 by the rotation drive of the fan is flown to the drain portion 20 formed in the center portion of the motor base 16, is flown along the inclined surface 20A and contained into a collection container 34 from the drain portion 20 through the discharge port 46, a drain pipe and a pipe 48.
摘要:
An induction heater having inner and outer chamber cylinders connected in an air tight manner to a base and cover with an inner chamber being formed within the inner chamber cylinder and an outer chamber being formed between the inner and outer chamber cylinders, a heat exchange core disposed in the inner chamber, and an induction heater coil disposed in the outer chamber extending around the inner chamber cylinder. A flow path is provided from a cool air inlet in the base, along the outer chamber, into the inner chamber and through the inner chamber and core to a heated air outlet in the base in a counterflow direction relative to the flow along the outer chamber. The heater is especially well suited for use in convective soldering and rework apparatus.
摘要:
The invention relates to a coating method (10) for applying a cover layer (17) to a base material (16). A solder positioned on a surface of the base material (16) is heated (13) until it is molten, for joining the solder to the base material (16) in a heat treatment (12). According to the invention, oxygen is diffused (14) in the molten lot for forming a diffusion layer (18) in the cover layer (17). The invention also relates to a component (21) for a steam turbine.
摘要:
A power module substrate (10) including an insulating substrate (11), a circuit layer (12) formed on one surface of the insulating substrate (11), and a metal layer (13) formed on the other surface of the insulating substrate (11), wherein the circuit layer (12) is composed of copper or a copper alloy, one surface of this circuit layer (12) functions as an installation surface on which an electronic component (3) is installed, the metal layer (13) is formed by bonding an aluminum sheet composed of aluminum or an aluminum alloy, a thickness t 1 of the circuit layer (12) is within a range of 0.1 mm ‰¤ t 1 ‰¤ 0.6 mm, a thickness t 2 of the metal layer (13) is within a range of 0.5 mm ‰¤ t 2 ‰¤ 6 mm, and the relationship between the thickness t 1 of the circuit layer (12) and the thickness t 2 of the metal layer (13) satisfies t 1
摘要:
A hot-dip plating apparatus for plating a thin molten solder film can control a film thickness of a molten solder on a base material evenly and in increments of a few µm and achieve a thin-film solder plating having a film thickness less than a conventional system. As shown in FIG. 1 , this apparatus comprises a solder bath 17 of accommodating the molten solder 7; a second conveying section 23 for drawing up a strip member 31 from the solder bath; and a blower section 19 for blowing hot gas on the strip member 31 immediately after being drawn up from the solder bath by a second conveying section 23; the hot gas having a predetermined flow volume and a predetermined temperature equal to or higher than a melting temperature of the molten solder 7. According to this configuration, the excess molten solder 7 can be trimmed from the strip member 31 corresponding to composition of the molten solder 7. Thus, the film thickness of the molten solder 7 coated on the strip member 31 can be controlled evenly and in increments of a few µm.