Abstract: A leg coupling for a table includes a coupling body for supporting a lower surface of a top plate. The coupling body includes an upper coupling projecting downward. The upper coupling is configured to be inserted into a coupling insertion hole of a leg. A lower coupling with a thread hole is coaxially arranged under the upper coupling. The coupling body includes a bolt insertion hole. A bolt inserted into the bolt insertion hole is screwed into the thread hole of the lower coupling. A peripheral surface of the upper coupling or a peripheral surface of the lower coupling can be press-fitted to an inner surface of the leg. The peripheral surface of the upper coupling has the same diameter as the peripheral surface of the lower coupling. Opposing ends of the upper coupling and the lower coupling have taper surfaces that can be engaged with each other.

Abstract: A zirconia oxygen sensor for measuring oxygen potential in the molten bath of a metal or alloy having a melting point of 350-550.degree. C., which comprises a reference electrode which is of a substance having a melting point of the same level as or lower than the metal or alloy of which the oxygen potential is to be measured and being liquid at the measurement temperature and is open to the atmosphere, a vessel of a zirconia solid electrolyte containing 5-10% yttria or 10-20% of calcium oxide (CaO) and a lead wire which connects the reference electrode and said molten metal or alloy and its use are disclosed.

Abstract: A system for making an on-line determination of the degree of alloying in galvannealed steel sheets are provided, which includes an X-ray tube for generating X-ray, detectors for detecting the X-ray diffraction intensity of the .zeta. phase and .GAMMA. phase of Fe--Zn intermetallic compounds phases of the galvannealed steel sheet and a detector for detecting the background intensity, all of the detectors being located same plane on the surface of the galvannealed steel sheets, and further includes an arithmetic unit for receiving the outputs of the detectors to compute the X-ray diffraction intensities. Preferably, this system includes a detector for detecting the X-ray diffraction intensity of the .delta..sub.1 phase.

Abstract: A method for estimating the press formability of galvannealed steel sheets provided, wherein: the values found by: ##EQU1## wherein I(.gamma.)=the total X-ray diffraction intensity of the .gamma. phase,I(.GAMMA.)=the total X-ray diffraction intensity of the .GAMMA. phase,I.sub.B (.gamma.)=the background X-ray diffraction intensity of the .gamma. phase,I(.gamma.)-I.sub.B (.gamma.)=the true X-ray diffraction intensity of the .gamma. phase,I(.GAMMA.)-I.sub.B (.GAMMA.)=the true X-ray diffraction intensity of the .GAMMA. phase,.GAMMA.=the .GAMMA. phase of an Fe-Zn intermetallic compound in coating of galvannealed steel sheet, and.gamma.=the .gamma. phase of the intermetallic compound, are used as an index to determine the press formability.

Abstract: There is disclosed a process for preparing hot-dip metal coated steel sheets having excellent corrosion resistance comprising electrolytically plating steel sheets containing Si and/or Cr with an Fe-B alloy containing 0.001.about.0.3% by weight of B to the thickness of 0.05.about.5 g/m.sup.2 and thereafter hot-dip-coating the thus pre-plated substrate sheets with a molten bath of Zn, Al or Zn-Al alloy. By this process poorly wettable steel sheets containing silicon and/or chromium can be well coated with zinc, aluminum and zinc-aluminum alloy.

Abstract: There is disclosed a process for preparing alloyed-zinc-plated steel sheet having excellent deep drawability, which comprises adjusting the temperature of substrate steel sheet of titanium-killed steel essentially consisting of C.ltoreq.0.01%, Si<0.15%, Mn: 0.15-0.85%, Ti: 0.05-0.30%, P.ltoreq.0.02%, S.ltoreq.0.02%, Al.ltoreq.0.05% and balance of Fe, to a temperature within a temperature range T(.degree.C.) defined as 180.ltoreq.T.ltoreq.-240.times.W+292, wherein W(%) is the Ti content of the substrate steel sheet, subjecting said steel sheet to Zn-plating by vacuum vapor deposition, and thereafter maintaining the plated steel sheet for alloying the plating zinc layer and the substate steel at 220.degree..about.320.degree. C. for 1-50 hours in accordance with Ti content of the substrate steel. This process provided alloyed zinc-plated steel sheets having excellent drawability and powdering resistance.

Abstract: Alloyed-zinc-plated steel sheet the alloyed layer of which is minutely cellulated is disclosed. Such an alloyed-zinc-plated steel sheet can be prepared by carrying out the vacuum deposition plating in an inert atmosphere containing 1.0-30 ppm oxygen by volume oxygen and subjecting the plated steel sheet to an alloying heat treatment.

Abstract: This invention relates to a zinc plated steel plate, at least one side surface of which is substantially free from oxides and coated with an anti-rust film, and a can produced from said zinc plated steel plate having an interlocking seam joint bonded by soldering techniques.

Abstract: Highly reliable measurement of degree of alloying of galvannealed steel sheets is carried out in order to fully control the continuous hot-dip galvanizing and galvannealing process on the basis of evaluation of a combination of two or more X-ray diffraction characteristics. Exact degree of alloying can be estimated without regard to fluctuations in the particulars of the material, the process conditions and the type of the product obtained.