摘要:
A high-temperature reaction solder, for silicon carbide materials, containing 20-45% cobalt and 80-55% silicon by weight, and a process for brazing are disclosed.
摘要:
Surfaces of copper or brass which are to be joined by tin/lead alloy soldering in a non-oxydizing atmosphere are first wetted by a treating liquid containing an organic solvent typified by ethyl alcohol; a polyhydric alcohol derivative typified by ethylene glycol; and an organic, halogen-containing activator typified by aniline hydrochloride. In the resulting soldered joint, the solder has spread acceptably well and little oxidation or wetting agent resident is formed.
摘要:
A method for soldering aluminum or aluminum alloys is disclosed, together with an alloy useful in the method. The method includes heating, for example by using a torch, at least one aluminum piece to a temperature within the range of 90-150 degrees celsius, cleaning at least one heated surface thereof, for example by wire brushing, further heating the cleaned piece to a temperature within the range of 350-490 degrees celsius, and applying, for example by rub soldering, to the cleaned and further-heated piece a quantity sufficient to enable subsequent soldering, as required, of a tin/lead/zinc alloy consisting essentially of, by weight, from 1.7 to 2.2 percent aluminum, from 0.01 to 0.02 percent magnesium, from 45.9 to 50.4 percent zinc, from 14.2 to 34 percent tin, and from 16.6 to 36.7 percent lead. A surface of the alloy so applied is then cleaned, for example by wire brushing; the aluminum piece is cooled to a soldering temperature and the alloy surface is soldered, for example by rub soldering, with a suitable lead-tin solder. According to the invention, single pieces of aluminum or aluminum alloy can be repaired, or a plurality of such pieces can be joined by intimately contacting soldered surfaces thereof and further heating to provide a repair or solder joint of high tensile strength.
摘要:
A method of and a device for soldering components on thick-film substrates according to the reflow method. Successively, the substrates are preheated, followed by heating to the soldering temperature, after which they are cooled. A wave of molten metal of a given temperature is used for preheating, heating and cooling of the substrates.
摘要:
In the manufacture of glazing panels comprising sheets marginally bonded together, in order to simplify and speed up production, a method of effecting bonding between at least one such sheet and one or more members assembled in marginal contact therewith, comprising bringing the assembly within the sphere of treatment means which is carried by a frame and causing the treatment means to act simultaneously on each side margin of the assembly to bond it together. In an apparatus for performing the method, in order to accommodate assemblies of different sizes carried by a support, each beam of the frame is coupled at one end relative to a movable coupling, whereby the end of each beam is movable along another beam in the direction of whose length its end coupling is movable, so that the size of the frame can be adjusted.
摘要:
The disclosure relates to brazing tips to circular saw blades. The tips are first heated red hot between carbon electrodes. After heating brazing paste is applied to the hot tips and the tips are reheated and brazed to the saw blade.
摘要:
In the wave soldering of terminals of an electrical device, such as a miniaturized printed circuit board assembly, the board is moved along a predetermined path so that it initially engages a first solder wave flowing counter to the direction of the board movement and subsequently engages a second solder wave flowing in the direction of board movement. The velocity of the solder in each of the solder waves is controlled independently by having separate independent pumping systems. Thus, the solder waves can be set at different independent velocities to achieve proper soldering of the terminals and associated conductor paths while reducing crossovers or bridges (i.e., shorts) between the terminals and the conductor paths as a result of the close spacing thereof.
摘要:
The present invention relates to the joining of a first glass member, such as an optical fiber, to a second member by means of solderable splices and terminations which additionally can form hermetic seals. To form the splice, termination or seal, the peripheral surface of the glass member is coated in the area of the intended joint between members with a thin adhering metallic layer. The coated glass member is properly positioned adjacent the second member and solder is flowed around the joint between the members. Where the second member is also formed of glass, a thin adhering metallic coating layer is similarly formed on the peripheral surface thereof in the area of the intended joint prior to solder being applied.
摘要:
A method of bonding a semiconductor body to a supporting member where the whole back face of the semiconductor body is covered with a thin evaporated layer of chromium or titanium, which layer is then covered with a thin evaporated layer of rhodium, platinum or palladium, which is in turn bonded by a film of solder to the supporting member.
摘要:
A tab is die cut from an internal portion of an electrical terminal strip and is offset outwardly therefrom to accommodate one end of an enameled electrical conductor which is inserted thereunder, the tab being then pressed down to clamp the conductor to the terminal, any projecting end of the conductor being simultaneously cut off. One side of an electric power source is then coupled to the main portion of the terminal and the other side of the power source is momentarily coupled to the tab. The current flow through the tab heats it above soldering temperature with the heat burning the enamel off of the conductor end adjacent the tab and melting solder which is applied to the conductor end and to adjacent surfaces to solder the conductor to the terminal.