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| Number | Title | Issue Date |
| 7358217 | Quenching oil compositions Quenching oil compositions comprising (1) an oil having kinematic viscosity (ASTM Test Method D-445) at 40° C. ranging from about 4 to about 45 mm2sec−1 (about 40 to about 210 Saybolt Universal Seconds (SUS)) and having a saturated content from about 80% to about... | 04/15/2008 |
| 6689227 | Eco-friendly starch quenchants This invention relates to application of eco-friendly starch solution as a quenching medium for heated metal parts fabricated from steel, alloy steel, aluminum and aluminum alloys. Depending on the material grade, critical temperature and desired cooling ... | 02/10/2004 |
| 5766505 | Water-soluble quenching medium The invention provides a water-soluble quenching medium suitably usable for quenching of metal, which can prevent quenching cracks and quenching ununiformity while having good hardenability. The medium comprises (A) a polyalkylene glycol having a weight a... | 06/16/1998 |
| 5685920 | Annealing separator having excellent reactivity for grain-oriented electrical steel sheet and method of use the same Disclosed is an annealing separator for production for grain-oriented electrical steel sheet, containing one or more compound selected from the following general formula; Mg1-x M3+x !O Mg1-x M2+x | 11/11/1997 |
| 5629251 | Ceramic coating-forming agent and process for the production thereof A ceramic coating-forming agent of an Mg-M3+ -O based two-component oxide solid solution capable of forming a ceramic coating excellent in heat resistance, adhesion to a substrate metal, electric insulation and the properties of low thermal exp... | 05/13/1997 |
| 5525165 | Method of surface modification of titanium alloy A cyaniding process, operating in a molten cyanide salt, and a nitriding process, operating in a Tufftride salt bath, can be utilized to modify the near-surface microstructure of Ti-6Al-4V alloy. The surface-hardened layers have been characterized with re... | 06/11/1996 |
| 5270374 | Water-based shielding compositions for locally protecting metal surfaces during heat treatment thereof An anti-nitriding composition comprising a water-based alkyd resin having suspended therein particulate tin and titanium dioxide; a thixotropic agent maintains the particulates in suspension during storage and application; the composition includes surfact... | 12/14/1993 |
| 5234507 | Anti-oxidant agent for continuous annealing of stainless steel strip and anti-oxidation method using the same An anti-oxidation agent for preventing oxidation of a stainless steel strip during continuous annealing comprising a colloidal inorganic substance which can be crystallized at a temperature not higher than 1300° C. at least one compound having a melting ... | 08/10/1993 |
| 5192373 | Magnesium oxide coating for electrical steels and the method of coating Decarburized grain oriented silicon steel is provided with an annealing separator which forms a glass film after the final high temperature anneal. The magnesia used as the annealing separator has a total chlorine level of 0.01 to 0.20% by weight based on... | 03/09/1993 |
| 5110854 | Water-based shielding compositions for locally protecting metal surfaces during heat treatment thereof An anti-nitriding composition comprising a water-based alkyd resin having suspended therein particulate tin and titanium dioxide; a thixotropic agent maintains the particulates in suspension during storage and application; the composition includes surfact... | 05/05/1992 |
| 5102476 | Process for nitrocarburizing components made from steel Components made from steel can be nitrocarburized in cyanate- and cyanide-containing salt baths within relatively short times if the process is carried out at 600° to 700° C. in a first stage and at 560° to 590° C. in a second stage. The components ex... | 04/07/1992 |
| 5011548 | Composition for deboronizing grain-oriented silicon steel For making a ductile boron-containing grain-oriented silicon steel, there is practiced, at a late stage in the making of the product either during the final texture anneal or a subsequent anneal, a high-temperature anneal in a reducing atmosphere with the... | 04/30/1991 |
| 4969959 | Methods for enhancing the thermal quenching of a metal surface A method for enhancing the thermal quenching of a metal surface comprises treating the metal surface with a complex phosphate acid ester. The metal surface is simultaneously or subsequently treated with a thermal quenching fluid. The method is particularl... | 11/13/1990 |
| 4948675 | Separating-agent coatings on silicon steel By adding an appropriate amount, 1 to 12 weight percent, based on the amount of magnesium oxide present and Loss On Ignition values of powdered magnesium metal to the magnesium oxide aqueous slurry composition used to make a separating-agent composition i... | 08/14/1990 |
| 4931108 | Method of heat treatment of rolled steel material using foams impregnated with water soluble polymers The present invention provides a method for cooling a rolled steel material, especially a wire rod, which comprises immersing a hot-rolled steel material in foams obtained by adding a blowing agent to water, which foams have a water content of 0.01 to 80 ... | 06/05/1990 |
| 4871402 | Separating-agent composition and method using same By adding an appropriate amount, 1 to 12 weight percent, based on the amount of magnesium oxide present and Loss On Ignition values of powdered magnesium metal to the magnesium oxide aqueous slurry composition used to make a separating-agent composition i... | 10/03/1989 |
| 4826545 | Method of heat treating metal parts using a washable synthetic quenchant A method of quenching metal components utilizing a water based quenching composition which includes a polyvinylpyrrolidone polymer of high molecular weight and in relatively high concentrations and thereafter power washing the parts to remove the polymeri... | 05/02/1989 |
| 4790888 | Stop-off composition A method and composition for stopping-off nitrogen and/or carbon diffusion into metal surfaces. The composition, which is a mixture of a refractory material selected from the group of zirconium and aluminosilicate, sodium silicofluoride and sodium silicat... | 12/13/1988 |
| 4778540 | Method for surface treatment and treating material therefor A method and a bath agent for forming a carbide or diffusion layer on the surface of an article to be treated by immersing the article in a molten salt bath. The salt bath comprises borax, at least one oxide of a surface layer forming element (SFE) select... | 10/18/1988 |
| 4775430 | Process for producing grain-oriented electrical steel sheet having improved magnetic properties For improving the properties of a glass film on a grain-oriented electrical steel sheet, the annealing separator applied on a decarburized steel sheet is prepared by: calcining at a high temperature to reduce the activity thereof; hydrating only on the ou... | 10/04/1988 |
| 4738731 | Method of heat treating metal using a washable synthetic quenchant A method of quenching metal components utilizing a water based quenching composition which includes a polyvinylpyrrolidone polymer of high molecular weight and in relatively high concentrations and thereafter power washing the parts to remove the polymeri... | 04/19/1988 |
| 4717429 | Process for the removal of alkali metal nitrite from nitrate containing salt baths Undesired nitrites are formed during the treatment of salt bath nitrided structural components of iron and steel in nitrate containing cooling baths, and they must be removed from the washing water. The build-up of nitrites can be avoided by oxidizing the... | 01/05/1988 |
| 4666535 | Method of producing low core losses in oriented silicon steels A method is provided for improving core-loss values of grain-oriented silicon steel after final texture annealing by boronizing the steel to levels of 0.001 to 0.009 wt. % after applying a boron-containing material to the final texture annealed steel, hea... | 05/19/1987 |
| 4647318 | Solution heat treatment for aluminum alloys A method of solution heat treating aluminum alloys, especially aluminum-lithium alloys, by immersing the alloy article in a chloride based neutral salt bath rather than in the conventionally used nitrate based salt bath. A chloride based bath, at least in... | 03/03/1987 |
| 4642141 | Method for producing grain-oriented silicon steel sheets A grain-oriented silicon steel sheet having high magnetic induction and low iron loss can be obtained by adhering uniformly at least one member selected from the group consisting of elements of Ge, Sn, Pb, As, Bi and Zn and compounds containing these elem... | 02/10/1987 |
| 4632708 | Annealing separator used in the finishing annealing step for producing a grain-oriented electrical steel sheet An annealing separator used in a finishing annealing step for producing a grain-oriented electrical steel sheet usually contains magnesia. The present invention is characterized by including, based on 100 parts by weight of magnesia, from 0.2 to 20 parts ... | 12/30/1986 |
| 4596612 | Method of quenching metals A metal quenchant fluid which is a mixture of water and a polyalkylene glycol and a inhibitor is substantially nitrite free. The inhibitor is a soluble product obtained by mixing a carboxylic acid having 4 to 12 carbon atoms in the molecule, an amine such... | 06/24/1986 |
| 4595425 | Corrosion inhibiting quenchant compositions An organic polymer containing composition suitable for use as a quenchant having incorporated therein a non-nitrite inhibitor system, which comprises an aromatic compound having at least one substituent nitro group and/or the water soluble organic or inor... | 06/17/1986 |
| 4584033 | Method of quenching A method of quenching which comprises the steps of (a) immersing a metal heated to an elevated temperature in a quenchant composition comprising an aqueous-solution of a sufficiently hydrophilic water-soluble or water-dispersible organic polymer of the fo... | 04/22/1986 |
| 4582547 | Method for improving the annealing separator coating on silicon steel and coating therefor A method for producing an annealing separator coating on grain oriented silicon steel prior to final texture annealing to improve the coating uniformity and prevent oxidation of the steel surface during this annealing operation. The method comprises coati... | 04/15/1986 |
| 4561911 | Aqueous solution for cooling cold-rolled steel strip in a continuous annealing process Cooling water containing an -amino acid suitable for cooling steel strips during their continuous annealing and after their overageing treatment. As the -amino acid, aliphatic amino acids, aromatic amino acids, heterocyclic amino acids and t... | 12/31/1985 |
| 4543134 | Process for producing grain-oriented electrical steel sheet having both improved magnetic properties and properties of glass film The present invention provides an annealing separator comprising from 0.05 to 2.0 parts by weight of antimony sulfate based on 100 parts by weight of magnesium oxide, and at least one chloride selected from the group consisting of Sb, Sr, Ti, and Zr chlor... | 09/24/1985 |
| 4537792 | Method of applying an annealing separator to grain oriented magnetic steel sheets A water repellent, for example an organic silicon compound, is added to an annealing separator which is applied electrostatically to the surface of a grain oriented magnetic steel sheet, or a glass-like film forming undercoating formed on the sheet surfac... | 08/27/1985 |
| 4528044 | Aqueous quenchants containing polyoxazolines and n-vinyl heterocyclic polymers and their use in quenching steel A process for quenching metals, particularly steel, using as the quenching bath an aqueous composition containing (a) a substituted oxazoline polymer and (b) an N-vinyl heterocyclic polymer or copolymer in which the heterocyclic group is composed of carbo... | 07/09/1985 |
| 4512823 | Barium or chromium additives to magnesium oxide coating slurry The instant invention is directed to a slurry for use in coating silicon steel prior to high temperature annealing, comprising magnesium oxide, water and at least one inorganic compound selected from the group consisting of barium oxide, barium nitrate, c... | 04/23/1985 |
| 4509993 | Regeneration agent for carburization salt bath It is known to regenerate salt baths for nitriding parts of iron and steel with polymers of organic materials, which polymers, however, could not be used in carburizing salt baths since with them there only are formed slight amounts of carburizing active ... | 04/09/1985 |
| 4496399 | Method and aqueous coating compositions for forming anti-stick and insulative coatings on semi-processed and fully-processed electrical steels A method and aqueous coating composition for forming an anti-stick and insulative coating on cold-rolled, non-oriented, semi-processed steel; cold-rolled, non-oriented, fully-processed steel; cold-rolled motor lamination steel; and punching quality orient... | 01/29/1985 |
| 4492604 | Salt bath for nitriding iron materials Low cyanide nitriding salt baths which are composed of alkali cyanate and alkali carbonate and used for treating components made of steel and iron produce coatings on the surface of the component in some cases and can lead to problems in the use of the co... | 01/08/1985 |
| 4486246 | Polyoxazolines in aqueous quenchants Metal, such as steel, is quenched in a quenching bath comprising an aqueous solution of a substituted oxazoline polymer, one example of which is polyethyloxazoline having a molecular weight of 50,000 to 500,000. The bath is capable of providing quenching ... | 12/04/1984 |
| 4465523 | Method of quenching metals A method of quenching metals is described, comprising immersing said metals in a quenching oil composition comprising: (a) a base oil, and (b) a compound represented by the general formula (1) or (2) as described below. ##STR1## (wherein all the symb... | 08/14/1984 |
