Patent
Roll for rolling process and its manufacture
Harada Yoshio,Tani Kazumi +1 more
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TLDR
In this paper, a roll surface is treated by a usual method such as grid blasting to remove foreign matter and to give ruggedness, and the surface after the treatment is subjected to thermal spraying with metal carbides such as WC, CrC, TiC and a carbide cermet consisting of Co, Ni or their alloys.Abstract:
PURPOSE:To manufacture a roll having a high flatness and wear resistance for a rolling process by thermally spraying carbide cermet on the treated surface of a roll and performing electroless nickel plating with a Ni-P alloy on the sprayed layer. CONSTITUTION:The roll surface is treated by a usual method such as grid blasting to remove foreign matter and to give ruggedness. The surface after the treatment is subjected to thermal spraying with metal carbides such as WC, CrC, TiC and a carbide cermet consisting of Co, Ni or their alloys. Electroless nickel plating is performed on the sprayed layer with a NiP alloy. After that, as necessary, the plating layer is heat treated at a temp. of >=200 deg.C for 0.1hr. Hence, the rolling roll having good wear resistance, flatness enough to scarcely flaw a rolled stock, and a long service life is obtained.read more
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Spray-coated roll for continuous galvanization
Yoshio Harada,Kazumi Tani +1 more
TL;DR: In this paper, a roll used for continuous galvanization is provided at its surface with a spray-coated layer made from a cermet spraying material consisting essentially of WC-Co.
Patent
Thermal-sprayed ceramic coating surface hole sealing method
TL;DR: In this article, a thermal-sprayed ceramic coating surface hole sealing method was proposed, which comprises the steps that: (1) a part containing a thermal spray ceramic coating is sensitized in an acid solution containing Sn ; (2) the part is activated in an acidic solution containing Pd ; and (3) chemical nickel plating is carried out in a chemical plating liquid containing a reducing agent and nickel salt.
Patent
Holding member for seamless can
TL;DR: In this article, the holding member for seamless cans having a sleeve formed with the front end which hardly wears at the time of inserting the cans onto the member by coating the outside surface of the sleeve with any of a metal oxide, metal carbide or metal carbides or the combination thereof by a thermal spraying method.
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Patent
Three-layer plated hot rolling roll
Abstract: PURPOSE:To provide the titled rolling roll which exhibits excellent resistance to wear at and under a high temp. and high load and prevents exfoliation of plating layers by providing successively a nickel plating layer, nickel-phosphorus alloy plating layer and chromium plating layer respectively having adequate thicknesses to the surface of the roll. CONSTITUTION:A nickle plating layer 2 having high adhesion strength, xcellent resistance to heat and not so much high hardness, a nickel-phosphorus alloy plating layer 3 having excellent resistance to heat and chromium plating layer 4 having high hardness are successively provided onto a roll base body 1 such as a hardness are successively provided onto a roll base body 1 such as a hardened roll made of a forged roll, etc. The thickness of the plating layers 2-4 are made respectively >=10mum and the total thickness of 3 kinds of the plating layers is made 30-150mum. The three-layer plated hot rolling roll having excellent resistance to wear and exfoliation is thus obtd. The rolling roll constituted in the above-mentioned way is preferably heat-treated further at about 300-800 deg.C in a non-oxidative atmosphere to form diffusion layers 5, 6, 7 on the body 1 and between the layers 2-4 to increase the adhesion. It is also possible to improve further the resistance to wear by forming a chromium oxide film layer 8 on the layer 4 by a heat treatment.
Patent
Roll for rolling
TL;DR: In this article, a roll body is provided with the thermally sprayed coating layer consisting of sintered hard and dense ceramic or cermet, which improves the resistance to wear, seizure or surface roughness of the roll for rolling.
Patent
Conductor roll for supplying electric current
TL;DR: In this paper, a conductor roll for supplying electric current is made of iron or an iron alloy plated optionally with a Cu alloy, and a layer of Ni or Ni-P alloy is formed on the peripheral surface of the roll.