Chromium Containing Patents (Class 420/74)
-
Patent number: 5278881Abstract: An Fe-Cr-Mn alloy is disclosed which has the following composition by wt% and corrosion resistance of which is improved and deterioration in its strength is prevented at grain boundaries due to irradiation of high-energy particles such as neutrons: 5 to 40% of Mn, 5 to 18% of Cr, 2.0 to 12% of Al and the balance of Fe except for unavoidable impurities. In the alloy according to the present invention, Al is added to an Fe-Cr-Mn alloy by a restricted quantity as a main component element. As a result of the addition of Al, an alloy can be obtained in which lowering of concentration of Cr at grain boundaries due to irradiation of high-energy particles such as neutrons can be prevented or concentration of the solutes can be raised.Type: GrantFiled: October 30, 1992Date of Patent: January 11, 1994Assignee: Hitachi, Ltd.Inventors: Takahiko Kato, Heishichiro Takahashi, Shinzoo Ikeda, Jiro Kuniya
-
Patent number: 5252148Abstract: A soft magnetic alloy having a composition of general formula:(Fe.sub.1-a Ni.sub.a).sub.100-x-y-z-p-q Cu.sub.x Si.sub.y B.sub.z Cr.sub.p M.sup.1.sub.q (I)wherein M.sup.1 is V or Mn or a mixture of V and Mn, 0.ltoreq.a.ltoreq.0.5, 0.1.ltoreq.x.ltoreq.5, 6.ltoreq.y.ltoreq.20, 6.ltoreq.z.ltoreq.20, 15.ltoreq.y+z.ltoreq.30, 0.5.ltoreq.p.ltoreq.10, and 0.5.ltoreq.q.ltoreq.10 and possessing a fine crystalline phase is suitable as a core, especially a wound core and a compressed powder core.Type: GrantFiled: August 10, 1992Date of Patent: October 12, 1993Assignee: TDK CorporationInventors: Masao Shigeta, Asako Kajita, Ippo Hirai, Tsutomu Choh
-
Patent number: 5173131Abstract: Stainless iron-base alloy having a total shape memory effect consisting, after a given cold mechanical deformation, in a recovery of the initial shape by heating, characterized in that its composition by weight is the following:9 to 13% chromium,15 to 25% manganese,3 to 6% silicon,the remainder being iron and residual impurities resulting from the fusion of substances necessasry for producing the alloy, the proportions of the elements satisfying the relation:1.43(%Si)+1 (%Cr) .ltoreq.17.The invention also provides a method for producing this alloy.Type: GrantFiled: November 21, 1990Date of Patent: December 22, 1992Assignee: Ugine, Aciers De Chatillon Et GueugnonInventor: Mantel Marc
-
Patent number: 5096664Abstract: Alloys according to the present invention exhibit good resistance to erosion and stress corrosion cracking. The contents of individual components in these alloys as expressed in terms of wt. % are as follows:______________________________________ 0.35 .ltoreq. C .ltoreq. 1.7, Si .ltoreq. 2.5, 10 .ltoreq. Mn .ltoreq. 25, 6 .ltoreq. Cr .ltoreq. 20, 0.5 .ltoreq. V .ltoreq. 7, 0.5 .ltoreq. Nb .ltoreq. 3, and N .ltoreq. 0.1, Fe = balance. ______________________________________Further, a mutual relationship represented by the following formula is maintained amoung the contents of V, Nb and C:(V/5+Nb/8)/C.gtoreq.1.Type: GrantFiled: January 30, 1991Date of Patent: March 17, 1992Assignee: Agency of Industrial Science and TechnologyInventors: Toshihiro Uehara, Rikizo Watanabe
-
Method of using an austenitic steel alloy as a wear part subject to gouging abrasion type metal loss
Patent number: 5069871Abstract: A method of producing a crusher wear part and the like subject to gouging abrasion type metal loss wherein the part is made of a modified austenitic (Hadfields) manganese steel having an Aluminum/Carbon ratio of 1.0 to 1.7, the casting being heat treated by heating to 2000.degree.-2050.degree. F. followed by a water quench to provide gouging abrasion resistance at least about 10% higher than that of Hadfields.Type: GrantFiled: May 2, 1990Date of Patent: December 3, 1991Assignee: ESCO CorporationInventor: William E. Fuller -
Patent number: 4966636Abstract: Carbon steels and other hot-and cold-workable ferrous alloys generally have poor damping capacity as compared to that cast iron (gray cast iron, malleable cast iron and ductile cast iron). This is because the graphite in cast irons helps to absorb the damping force and depresses the damping wave. But cast iron can not be rolled into strip or sheet.By controlling the correlated concentrations of manganese, aluminum and carbon, Fe-Mn-Al-C based alloys are made to be .alpha.+.gamma. two-phase alloy steel with different .alpha. and .gamma. volume fractions. With particular ferrite volumes, workable Fe-Mn-Al-C based alloys have equivalent and better damping capacity than that of cast irons especially in the high frequency side. Such alloys suppress the vibration noise that comes from machine rooms, motors, air conditioners, and etc. Chromium and other minor amount of elements can be added to this alloy system to improve the corrosion resistance.Type: GrantFiled: April 20, 1989Date of Patent: October 30, 1990Assignee: Famcy Steel CorporationInventor: Chi-Meen Wan
-
Patent number: 4957700Abstract: A high strength non-magnetic stainless steel comprising by weight ratio, less than 0.20 % C, less than 1.00 % Si, 14-16 % Mn, less than 0.005 % S, 0.2-1.0 % Ni, 15-19 % Cr, 0.30-0.40 % N, and Fe and other impurity elements, of which C+N constitutes 0.40-0.55 % and the Mn equivalent equals 30-33. The stainless steel has a hardness more than Hv 500, a magnetic permeability less than 1.01 after drawing, the steel may be suitably used as the steel for the micro shafts of video tape recorders and electromagnetic valves.Type: GrantFiled: July 5, 1989Date of Patent: September 18, 1990Assignee: Aichi Steel Works, Ltd.Inventors: Yoshinobu Honkura, Toru Matsuo, Kouji Murata
-
Patent number: 4933027Abstract: An iron-based shape-memory alloy excellent in a shape-memory property, a corrosion resistance and a high-temperature oxidation resistance, consisting essentially of:chromium: from 5.0 to 20.0 wt. %,silicon: from 2.0 to 8.0 wt. %,at least one element selected from the group consisting of:manganese: from 0.1 to 14.8 wt. %,nickel: from 0.1 to 20.0 wt. %,cobalt: from 0.1 to 30.0 wt. %,copper: from 0.1 to 3.0 wt. %, andnitrogen: from 0.001 to 0.400 wt. %,whereNi+0.5 Mn+0.4 Co+0.06 Cu+0.002 N.gtoreq.0.67 (Cr+1.2 Si)-3,and the balance being iron and incidental impurities.Type: GrantFiled: February 23, 1989Date of Patent: June 12, 1990Assignee: NKK CorporationInventors: Yutaka Moriya, Tetsuya Sanpei, Hisatoshi Tagawa
-
Patent number: 4929289Abstract: An iron-based shape-memory alloy excellent in a shape-memory property and a corrosion resistance, consisting essentially of:______________________________________ chromium: from 0.1 to 5.0 wt. %, silicon: from 2.0 to 8.0 wt. %, manganese: from 1.0 to 14.8 wt. %, at least one element selected from the group consisting of: nickel: from 0.1 to 20.0 wt. %, cobalt: from 0.1 to 30.0 wt. %, copper: from 0.1 to 3.0 wt. %, and nitrogen: from 0.001 to 0.400 wt. %, where, Ni + 0.5 Mn + 0.4 Co + 0.06 Cu + 0.002 N .gtoreq. 0.67 (Cr + 1.2 Si), and the balance being iron and incidental impurities.Type: GrantFiled: February 23, 1989Date of Patent: May 29, 1990Assignee: NKK CorporationInventors: Yutaka Moriya, Tetsuya Sanpei, Hisatoshi Tagawa
-
Patent number: 4929416Abstract: Cast steel has the composition (% by mass)______________________________________ carbon 1.6-3.0 silicon 1.2-1.6 manganese 11.0-15.0 chromium 9.0-10.8 cerium 0.001-0.2 vanadium 0.15-0.3 titanium 0.05-0.3 aluminium 0.05-0.15 boron 0.005-0.015 iron the balance. ______________________________________The steel according to the present invention is intended for the manufacture of articles, operating under conditions of an intensive shock-abrasive wear and high contact loads of a shock character.Type: GrantFiled: April 7, 1989Date of Patent: May 29, 1990Inventors: Vadim I. Tikhonovich, Vladimir D. Pavljuk, Bertold B. Vinokur, Stanislav E. Kondratjuk, Georgy G. Lutsenko, Vladimir K. Edemsky, Vladimir B. Kiselev, Nikolai M. Karasev, Anatoly K. Myakishev
-
Patent number: 4882124Abstract: The alloys of this invention illustrate good property on erosion resistance. The compositions of these alloys are C: more than 0.09 wt. % and less than 1.7 wt. %, Si: 2.5 wt. % or less, Mn: 10-25 wt. %, Cr: 6-20 wt. %, V: more than 4 wt. % and less than 7 wt. % , N: 0.1 wt. % or less, and Fe: the rest. Optional small content is Ni and /or Mo.Type: GrantFiled: October 11, 1988Date of Patent: November 21, 1989Assignee: Extra-Ministerial Bureau of Ministry of Trade & Industry Agency of Industrial Science & TechnologyInventors: Toshihiro Uehara, Rikizo Watanabe
-
Patent number: 4875933Abstract: This invention describes the melting of Fe-Mn-Al Alloys and includes production methods such as non-continuous casting, continuous casting, hot forging, hot rolling, cold rolling, surface finishing, and heat treating. Products produced using one or more of the above said methods include case ingot, billet, bloom, slab, cast piece, hot-rolled plate, hot-rolled coil, bar, rod, cold-rolled strip and sheet, and hot-forged piece. The said alloys consist principally of by weight 10 to 35 percent Mn, 4 to 12 percent Al, 0 to 12 percent Cr, 0.01 to 1.4 percent C, 0.3-1.5 Mo, 0.1-1% S, a small amount of Cu, Nb, V, CO, Ti, B, N, Zr, Hf, Ta, Sc, W, and Ni, and the balanced Fe.Type: GrantFiled: July 8, 1988Date of Patent: October 24, 1989Assignee: Famcy Steel CorporationInventor: Chi-Meen Wan
-
Patent number: 4865662Abstract: An austenitic stainless steel alloy has a composition of about 6 to about 13 percent aluminum, about 7 to about 34 percent manganese, about 0.2 to about 2.4 percent carbon, 0.4 to about 1.3 percent silicon, about 0 to about 6 percent chromium, about 0.5 to about 6 percent nickel, and the balance essentially iron. The relative quantities of the foregoing elements are selected from these ranges to produce a volume percent of ferrite structure in the alloy in the range of about 1 percent to about 8 percent.Type: GrantFiled: March 3, 1988Date of Patent: September 12, 1989Assignee: Ipsco Inc.Inventors: James M. Zimmer, William D. Bailey
-
Patent number: 4788034Abstract: A martensite steel, especially for plastic molds, of the following compositions:0.001 to 0.1% carbon0.50 to 2.0% silicon8.0 to 14.0% manganese0.3 to 5.0% titanium0.001 to 1.0% aluminum0 to 2.0% chromium0 to 3.0% molybdenum0 to 4.0% nickel0 to 4.0% tungsten0 to 5.0% cobaltremainder iron, including impurities caused by manufacture.Type: GrantFiled: August 21, 1987Date of Patent: November 29, 1988Assignee: Thyssen Edelstahlwerke AGInventors: Helmut Brandis, Paul Gumpel
-
Patent number: 4721600Abstract: A superplastic hot working method for a duplex-phase, nitrogen-containing ferrous alloy and stainless steel, and a superplastic duplex-phase ferrous alloy are disclosed. The ferrous alloy comprises: at least one of Si and Mn in an amount of not less than 0.5% and not less than 1.7%, respectively; and N: at least 0.01% in solid solution, wherein Si eq and Mn eq which are defined as:Si eq=Si+(2/3)(Cr+Mo), and Mn eq=Mn+2 Ni+60 C+50 N,satisfy the formula:(5/6)(Si eq)-15/2.ltoreq.Mn eq.ltoreq.(11/5)(Si eq)-77/5,and its superplastic hot working is carried out by deforming the alloy heated to 700.degree.-1200.degree. C. at a strain rate of 1.times.10.sup.-6 S.sup.-1 to 1.times.10.sup.0 S.sup.-1. In another aspect, superplastic hot working of a duplex-phase stainless steel comprising Cr: 10.0-35.0%, Ni: 2.0-18.0%, Mo: 0-6.0%, and N: 0.005-0.3% and having the values of Si eq and Mn eq as above is carried out by deforming the steel at a strain rate of from 1.times.10.sup.-6 S.sup.-1 to 1.times.10.sup.1 S.sup.Type: GrantFiled: March 27, 1986Date of Patent: January 26, 1988Assignee: Sumitomo Metal Industries, Ltd.Inventors: Yasuhiro Maehara, Yoshio Tarutani
-
Patent number: 4637843Abstract: The present invention relates to the core of a noise filter.Conventionally, ferrite or iron powder is used as the core of a noise filter. Some patent publications disclose the core of a noise filter made of an amorphous magnetic alloy.An amorphous magnetic alloy which as a low pulse-noise resistance deterioration percentage is that on or within the curve X and Y of FIG. 3.Type: GrantFiled: May 3, 1985Date of Patent: January 20, 1987Assignee: TDK CorporationInventors: Suguru Takayama, Masao Shigeta
-
Patent number: H326Abstract: Manganese-iron base and manganese-chromium-iron base austenitic alloys designed to have resistance to neutron irradiation induced swelling and low activation have the following compositions (in weight percent): 20 to 40 Mn; up to about 15 Cr; about 0.4 to about 3.0 Si; an austenite stabilizing element selected from C and N, alone or in combination with each other, and in an amount effective to substantially stabilize the austenite phase, but less than about 0.7 C, and less than about 0.3 N; up to about 2.5 V; up to about 0.1 P; up to about 0.01 B; up to about 3.0 Al; up to about 0.5 Ni; up to about 2.0 W; up to about 1.0 Ti; up to about 1.0 Ta; and with the remainder of the alloy being essentially iron.Type: GrantFiled: June 23, 1986Date of Patent: September 1, 1987Assignee: The United States of America as represented by the United States Department of EnergyInventors: Howard R. Brager, Francis A. Garner
-
Patent number: H807Abstract: An austenitic stainless steel that is comprised of Fe, Cr, Mn, C but no Ni or Nb and minimum N. To enhance strength and fabricability minor alloying additions of Ti, W, V, B and P are made. The resulting alloy is one that can be used in fusion reactor environments because the half-lives of the elements are sufficiently short to allow for handling and disposal.Type: GrantFiled: November 16, 1988Date of Patent: August 7, 1990Assignee: The United States of America as represented by the United States Department of EnergyInventors: Ronald L. Klueh, Philip J. Maziasz