Abstract: A zinc-based alloy comprising about 50 to 90 weight percent zinc and about 10 to 50 weight percent of at least one other metal selected from the group consisting of nickel, cobalt and iron. The zinc-based alloy according to the invention is particularly suitable for use as coating material for producing thermal-sprayed coatings having improved corrosion resistance and adherence.

Abstract: A primary multi-layer structural component having insulation properties and the method of producing same is disclosed. The structure is comprised of opposing spaced apart face sheets, a plurality of internal core sheets, the core sheets being spaced apart from each other and from the face sheets. Truss means extend internally across the structure, the truss means being connected to and supporting the opposing face sheets, and being integrally connected to and supporting the core sheets. Such structure is produced by forming a stack of metal sheets in contact with each other, including a pair of outer face sheets and a plurality of core sheets positioned between the face sheets, and providing a predetermined stop-off pattern by placing stop-off material in certain preselected areas between the contacting surfaces of adjacent faces sheets and core sheets, and of adjacent core sheets.

Abstract: A carbon dioxide snow nozzle for in particular rendering a molten metal inert. The nozzle comprises a supply pipe supplying liquid carbon dioxide under pressure for connection to a source of liquid carbon dioxide under pressure, a T-shaped element having one end connected to the pipe and the other two ends connected to liquid carbon dioxide conveying line which each have and to a controlled valve the outlets of the valves being interconnected by a V-shaped connecting element which opens onto a pipe for discharging the snow.

Abstract: A process for producing a galvanneal layer on a steel substrate, including forming a Zn-Fe coating having a predetermined Fe content F (wt. %) on the steel substrate; and heat treating the Zn-Fe coating on the substrate from a predetermined starting temperature T.sub.1 (.degree.C.) to a predetermined ending temperature T.sub.2 (.degree.C.) at a predetermined heating rate R (.degree.C./min.), wherein F, T.sub.1, T.sub.2, and R are selected so that the following condition is met,a.R.sup.2 +b.T.sup.2 +c.R.F.+d.R.T +e.R+f.T=gwhere a, b, c, d, e, f and g are predetermined constants, thereby to form a virtually 100% .delta..sub.1 phase galvanneal structure. Alternatively, the heat treatment can be preformed until the specimen temperature is just below a minimum temperature of the .delta..sub.1 phase stability range at at selected Fe content and heating rate, followed by an isothermal hold for a predetermined time period until transformation to the .delta..sub.1 phase occurs.

Abstract: This invention relates to metal wire used to produce reinforcing elements for articles of elastomeric material. The wire is provided with a coating ensuring at the same time a good resistance to corrosion, good values of initial adhesion, and a low decay, due to ageing, of the bond with the elastomeric material, said coating being constituted by two concentric layers of a Zn/Ni alloy, where the radially inner layer contains Zn in an amount ranging between 60% and 90% based on total layer and the radially outer layer contains Ni in an amount ranging between 60% and 80% based on the total layer.

Abstract: An injection apparatus for use in injecting substances into molten metal contained in a vessel including a nozzle block having at least one initially closed injection passage and a lance movable in the passage and advanceable to open the passage for injection to commence. Sealing means is provided to establish a seal in a space between the lance pipe and the passage when the pipe is advanced to its injection position. The sealing means can include a compressible fibrous refractory sleeve fastened to the pipe adjacent an inlet end thereof. The sealing means can also comprise an array of compressible seal rings made of a compliant graphite material mounted on the pipe adjacent an inlet end of the pipe.

Abstract: A corrosion preventive steel sheet having an organic coating layer is described. The steel sheet is comprised of a zinc alloy-plated steel sheet, and a chromate layer and an organic coating layer formed in this order on at least one side of the steel sheet. The organic coating layer is formed from a coating composition comprised of 100 parts by weight of a water-soluble urethane resin and from 5 to 80 parts by weight of colloidal silica. A method for making the corrosion preventive steel sheet is also described.

Abstract: An electroplated composite steel strip having a high corrosion resistance comprises a steel strip substrate and a corrosion resistant coating layer which comprises at least a base plating layer comprising a zinc-based metal matrix, a number of corrosion-preventing fine solid particles consisting essentially of core fine particles of, for example, chromate, phosphate, aluminum, molybdenum or titanium compounds, and encapsulated by very thin coating membranes consisting of, for example, SiO.sub.2, Al.sub.2 O.sub.3, ZrO.sub.2 or TiO.sub.2, and optionally a number of additional fine particles consisting essentially of, for example, SiO.sub.2, TiO.sub.2, Cr.sub.2 O.sub.3, Al.sub.2 O.sub.3, ZrO.sub.2, SnO.sub.2 or Sb.sub.2 O.sub.5.

Abstract: An improved layout of the hearth rolls in an annealing furnace comprises a plurality of ceramic coated rolls and a plated rolls. The ceramic coated rolls are arranged in a region in the annealing furnace, where the temperature is higher than 450.degree. C. On the other hand, the plated rolls are arranged in a region where the temperature is lower than or equal to 450.degree. C. The hearth roll is provided a wear resistant coating of chrome plate or sprayed on ceramic of a thickness greater than or equal to 1 .mu.m and less than or equal to 100 .mu.m. In addition, according to the invention, the hearth roll is provided a surface roughness Ra in the range of 4.5 .mu.m to 20 .mu.m.

Abstract: Conventional electroplated steel sheets of Zn alloys of Zn-Ni base, Zn-Fe base, etc., having a poor phosphating performance, have been involved in the problems such that when used for automobile bodies, craterings may be generated on coating films at the time of electrodeposition coating to damage the coating appearance, or that only poor corrosion resistance and pin holing resistance can be achieved at the portions where no coating film is applied or only a thin coating film is applied for structural reasons of automobile bodies.To solve such problems, this invention provides a multilayer zinc metal electroplated steel sheet comprising (i) a lower layer electroplated coating provided on the surface of the steel sheet and comprising a Zn-Ni base alloy having Ni content of 10 to 16 wt. % or Zn-Fe base alloy having Fe content of 10 to 30 wt. %, containing 0.005 to 5 wt.

Abstract: A grain oriented electromagnetic steel sheet having a very low iron loss is obtained by subjecting a surface of base metal in the sheet after finish annealing to a particular mechanical polishing and has a surface roughness having a center-line average roughness of not more than 0.3 .mu.m after the polishing and the number of abrasive grains embedded in a layer just beneath polished surface of not more than 20,000 grains/cm.sup.2.

Abstract: A refractory ceramic sink includes a frusto-conically shaped internal ceramic element having upper and lower end surfaces and an outer surface extending between the upper and lower end surfaces, and an external ceramic element encompassing the internal ceramic element and having upper and lower end surfaces and an inner surface extending between the upper and lower end surfaces and shaped complementary to the outer surface of the internal ceramic element. Channels are formed directly in at least one of the inner surface of the external ceramic element and the outer surface of the internal ceramic element, the channels extending from the bottom to the top of the sink.

Abstract: Aluminum thin plates which are used as fins of a heat exchanger can be manufactured, as described in the claims, by controlling the composition of an aluminum alloy, which is used as a core material, and controlling the cold rolling reduction ratio of a clad material composed of the core material and a skin material, after hot rolling. The thus manufactured aluminum thin plates for brazing are excellent in high-temperature sagging resistance and sacrificial anodic effect, whereby it is possible to make the fins thinner.

Abstract: Fluxes for use in brazing aluminum-based alloy pieces are disclosed. One is a flux which comprises 70 to 90% wt % K.sub.2 SiF.sub.6 and 30 to 10 wt % AlF.sub.3. The other is a flux which comprises 98.5 to 94 wt % base composition which includes K.sub.2 SiF.sub.6 whose amount is 70 to 90 wt % of the base composition and AlF.sub.3 whose amount is 30 to 10 wt % of the base composition; 0.5 to 3 wt % LiF; and 1 to 3 wt % NaF. In order to facilitate the application of the flux to the pieces to be brazed, polybutene is used as a dispersing agent.

Abstract: The invention relates to a plated steel sheet for cans which must have high workability and corrosion resistance and can prevent bimetallic corrosion and a method of manufacturing the same. The plated steel sheet is manufactured by forming an electroplated chromium layer on the surface of a steel, removing a hydrated chromium oxide layer formed on the surface of the chromium layer, and forming an aluminum plating layer, so that the electroplated chromium layer and the aluminum plating layer are stacked in direct contact with each other. Another plated steel sheet is manufactured by forming a vacuum deposited chromium layer on the surface of a steel, and forming an aluminum plating layer.

Abstract: An erosion resistant electrical contact material and a method of making the material is described. The material comprises from about 10 to about 20 volume percent of SnO.sub.2, from about 0.45 to about 1.2 volume percent of an oxide selected from the group consisting of TiO.sub.2, CeO.sub.2, ZrO.sub.2, HfO.sub.2, and combinations thereof and the balance being substantially silver.

Abstract: A composite electroplated steel sheet comprises Zn being a matrix metal of a plating layer; and codeposited particles of a plating layer of at least one selected from the group consisting of Mg.sub.2 Si.sub.3 O.sub.8, CaSiO.sub.3 and BaTiO.sub.3. A composite electroplated steel sheet comprises Zn alloy containing at least one selected from the group consisting of Fe, Co, Ni, Mn, Cr and Ti being a matrix metal of a plating layer; and codeposited particles of a plating layer comprising at least one selected from the group consisting of Mg.sub.2 Si.sub.3 O.sub.8, CaSiO.sub.3 and BaTiO.sub.3. The codeposited particles are contained within the range of from 0.1 to 5.0 wt.% in a plating layer.

Abstract: A semiconductor device comprising a metallized layer formed on a silicon substrate, wherein said metallized layer is an aluminum alloy consisting essentially of aluminum, silicon and at least one element selected from the group consisting of titanium, vanadium, chromium, tungsten, and phosphorus the amount of silicon being 1.0% to 3.0% by weight, the amount of said selected element corresponding to the relative service life required of the metallized layer, said required service life being 10 times that of a metallized layer having the same composition as that of the above-mentioned metallized layer except for being free from said element, and the rest being aluminum. For example, the metallized layer may contain at least 0.04% and less than 0.10% by weight of titanium, 1.0% by weight of silicon, and the rest aluminum.

Abstract: A high-temperature resistant blast pipe is primarily intended for delivering gas, such as oxygen, and, when appropriate, solid material to metallurgical processes, and incorporates a layer of refractory material comprising a refractory mixture of solid particles and an alkali-silicate based binder.The blast pipe is characterized in particular in that the major constituent of the binder is of the type polymerized alkali silicate.

Abstract: Known techniques of plasma case hardening of workpieces may fail to provide sufficient treatment to re-entrant portions, such as fine holes, in the workpiece. This specification discloses a technique of pulsed plasma treatment in which the duration of the plasma pulses and the intervals between them are selected to allow a substantially even distribution of the gas which forms the plasma over all the surface to be treated of the workpiece.