Abstract: A high-strength thin plate, such as for IC lead frames, of an iron-nickel-cobalt alloy which is able to withstand repeated bending and is corrosion resistance and etchable, the alloy containing 27 to 30 wt. % N:, 5 to 18 wt. % Co, 0.10 to 3.0 wt. % Mn, 0.10 wt. % or less Si, 0.010 to 0.075 wt. % C, 0.001 to 0.014 wt. % N, less than 2.0 ppm H, 0.0040 wt. % or less S, 0.004 wt. % or less P, 0.0050 wt. % or less O, 0.01 to 0.06 wt. % Cr, 0.01 to 1.0 wt. % Mo and the balance being Fe and unavoidable impurities wherein 63.5 wt. %.ltoreq.2Ni+Co+Mn.ltoreq.65 wt. % for Co<10 wt. % and 69.5 wt. %.ltoreq.2Ni+Co+Mn.ltoreq.74.5 wt. % for Co>10 wt. %.

Abstract: A method for manufacturing an alloy sheet for a shadow mask is provided which includes: (i) annealing a hot-rolled sheet containing Fe and Ni at a temperature of 910.degree. to 990.degree. C.; (ii) cold-rolling the annealed hot-rolled sheet from step (i) to produce a cold-rolled sheet; (iii) crystallization annealing of the cold-rolled sheet from step (ii); (iv) cold-rolling the annealed cold rolled sheet from step (iii); (v) finish recrystallization annealing step of the cold-rolled sheet of step (iv); (vi) finish cold-rolling of the sheet from step (v) at a cold-rolling reduction ratio R (%) satisfying the following equations: 16.ltoreq.R.ltoreq.75 and 6.38 D-133.9.ltoreq.R.ltoreq.6.38 D-51.0 wherein D is the average austenite grain size in .mu.m; (vii) softening annealing the sheet from step (vi) at a temperature of 720.degree. to 790.degree. C. for 2 to 40 minutes before press-forming and at conditions of temperature T in .degree.C. and time t in minutes which satisfy the following equation :T.gtoreq.-53.

Abstract: A thin Fe--Ni alloy sheet for shadow mask consists essentially of Ni of 34 to 38 wt. %, Si of 0.05 wt. % or less, B of 0.0005 wt. % or less, O of 0.002 wt. % or less and N of 0.0015% or less, the balance being Fe and inevitable impurities; said alloy sheet after annealing before press-forming having 0.2% proof stress of 28.5 kgf/mm.sup.2 or less; and a degree of {211} plane on a surface of said alloy sheet being 16% or less. And further modified similar alloy sheets are also provided.Further, a method for producing a thin Fe--Ni alloy sheet for shadow mask comprises the steps of: (a) hot-rolling of a slab into a hot-rolled alloy strip; (b) hot-rolled sheet annealing of the hot-rolled strip at 910 to 990.degree. C.; (c) cold-rolling of the annealed hot-rolled strip into a cold-rolled strip; (d) recrystallization annealing of the cold-rolled strip; (e) finish cold-rolling of the recrystallization annealed strip at a finish cold reduction ratio in response to austenite grain size D(D.mu.

Abstract: An alloy sheet for making a shadow mask consists essentially of 34 to 38 wt. % Ni, 0.07 wt. % or less Si, 0.002 wt. % or less B, 0.002 wt. % or less O, less than 0.002 wt. % N and the balance being Fe and inevitable impurities;said alloy sheet after annealing before press-forming having 0.2% proof stress of 28 kgf/mm.sup.2 or less; anda gathering degree of {211} plane being 16% or less.A method for manufacturing an alloy sheet comprises:a finish cold-rolling step of cold-rolling the cold-rolled sheet at a cold-rolling reduction ratio in response to an average austenite grain size D (.mu.m), the reduction ratio of final cold-rolling R (%) satisfying the equations below;16.ltoreq.R.ltoreq.75,6.38D-133.9.ltoreq.R.ltoreq.6.38D-51.0a softening annealing step of annealing said cold rolled sheet in a temperature range of 720.degree. to 790.degree. C. for 2 to 40 min. before press-forming and on conditions satisfying the equation below;T.gtoreq.-53.8 log t+806,where T(.degree. C.) is the temperature and t (min.

Abstract: An alloy sheet having a pierced hole face and providing a desirable etching performance, comprising {331}, {210}, and {211} planes on the surface; the gathering degree of the {311} plane being 14% or less, the gathering degree of the {210} plane being 14% or less, and the gathering degree of the {211} plane being 14% or less; and the ratio of the gathering degrees expressed by the equation {210}/({331}+{211}) being 0.2 to 1. An alloy sheet having a pierced hole face providing a desirable etching performance, comprising planes of {111}, {100}, {110}, {311}, {331}, {210} and {211}; the gathering degree of the {111} plane, S.sub.1, being 1 to 10%, the gathering degree of the {100} plane, S.sub.2, being 50 to 94%, the gathering degree of the {110} plane, S.sub.3, being 1 to 24%, the gathering degree of the {311} plane, S.sub.4, being 1 to 14%, the gathering degree of the {331} plane, S.sub.5, being 1 to 14%, the gathering degree of the {210} plane, S.sub.

Abstract: A thin Fe--Ni alloy sheet for shadow mask consists essentially of Ni of 34 to 38 wt. %, Si of 0.05 wt. % or less, B of 0.0005 wt. % or less, O of 0.002 wt. % or less and N of 0.0015 % or less, the balance being Fe and inevitable impurities; said alloy sheet after annealing before press-forming having 0.2% proof stress of 28.5 kgf/mm.sup.2 or less; and a degree of {211} plane on a surface of said alloy sheet being 16% or less. And further modified similar alloy sheets are also provided.Further, a method for producing a thin Fe--Ni alloy sheet for shadow mask comprises the steps of: (a) hot-rolling of a slab into a hot-rolled alloy strip; (b) hot-rolled sheet annealing of the hot-rolled strip at 910.degree. to 990.degree. C.; (c) cold-rolling of the annealed hot-rolled strip into a cold-rolled strip; (d) recrystallization annealing of the cold-rolled strip; (e) finish cold-rolling of the recrystallization annealed strip at a finish cold reduction ratio in response to austenite grain size D(D.mu.

Abstract: An alloy sheet for making a shadow mask consists essentially of 34 to 38 wt. % Ni, 0.07 wt. % or less Si, 0.001 wt. % or less B, 0.003 wt. % or less O, 0.002 wt. % or less N, and the balance being Fe and inevitable impurities.The alloy sheet has an average austenite grain size (Dav) of 10.5 to 15.0 .mu.m, a ratio of a maximum size to the minimum size of austenite grains (Dmax/Dmin) of 1 to 15, a Vickers hardness (Hv) of 165 to 220 and satisfying a relation of10.times.Dav+80.gtoreq.Hv.gtoreq.10.times.Dav+50;and gathering degree of crystal planes on said alloy sheet surface of14% or less for {111} plane,5 to 75% for {100} plane,5 to 40% for {110} plane,20% or less for {311} plane,20% or less for {331} plane,20% or less for {210} plane, and20% or less for {211} plane.

Abstract: A method for manufacturing an ultra-high-strength cold-rolled steel sheet having desirable delayed fracture resistance, which comprises: preparing a material consisting essentially of 0.1 to 0.25 wt. % carbon, up to 1 wt. % silicon, 1 to 2.5 wt. % manganese, up to 0.020 wt. % phosphorus, up to 0.005 wt. % sulfur, 0.01 to 0.05 wt. % soluble aluminum, 0.0010 to 0.0050 wt. % nitrogen, optionally at least one of Nb, Ti or V, optionally at least one of Cu, Ni, B, Cr or Mo, the balance being iron and incidental impurities; subjecting the material to a hot rolling, a pickling and a cold rolling to prepare a cold-rolled steel sheet; and subjecting the cold-rolled steel sheet to a continuous heat treatment which comprises: subjecting the cold-rolled steel sheet to a soaking treatment at a temperature of Ac.sub.3 to 900.degree. C. for 30 seconds to 15 minutes, quenching the cold-rolled steel sheet at a quenching rate of at least 400.degree. C./second from a temperature of at least a lower limit temperature (T.sub.

Abstract: A method for manufacturing an alloy sheet comprising the steps of: (a) hot-rolling a slab containing Fe, Ni and Cr into a hot-rolled strip; (b) annealing the hot-rolled strip at a temperature of 810.degree. to 890.degree. C.; (c) cold-rolling the annealed hot-rolled strip at a reduction ratio of 81 to 94% into a cold-rolled sheet; (d) recrystallization annealing of the cold-rolled sheet; (e) finish cold-rolling the cold-rolled sheet subjected to the recrystallization annealing at a reduction ratio of 14 to 29%; (f) stress relief annealing of the cold-rolled sheet subjected to the finish cold-rolling; and (g) annealing, before press-forming. The cold-rolled sheet subjected to the stress relief annealing at a temperature of 740.degree. to 900.degree. C. for 2 to 40 minutes and satisfying the following equation: T.ltoreq.-123 logt+937, where T is a temperature (.degree.C.) and t is a time (minutes) for the annealing.

Abstract: A thin Fe--Ni alloy sheet for shadow mask consists essentially of Ni of 34 to 38 wt. %, Si of 0.05 wt. % or less, B of 0.0005 wt. % or less, O of 0.002 wt. % or less and N of 0.0015% or less, the balance being Fe and inevitable impurities; said alloy sheet after annealing before press-forming having 0.2% proof stress of 28.5 kgf/mm.sup.2 or less; and a degree of {211} plane on a surface of said alloy sheet being 16% or less. And further modified similar alloy sheets are also provided.Further, a method for producing a thin Fe--Ni alloy sheet for shadow mask comprises the steps of: (a) hot-rolling of a slab into a hot-rolled alloy strip; (b) hot-rolled sheet annealing of the hot-rolled strip at 910.degree. to 990.degree. C.; (c) cold-rolling of the annealed hot-rolled strip into a cold-rolled strip; (d) recrystallization annealing of the cold-rolled strip; (e) finish cold-rolling of the recrystallization annealed strip at a finish cold reduction ratio in response to austenite grain size D(D.mu.

Abstract: A thin Fe--Ni alloy sheet for shadow mask consists essentially of Ni of 34 to 38 wt. %, Si of 0.05 wt. % or less, B of 0.0005 wt. % or less, O of 0.002 wt. % or less and N of 0.0015% or less, the balance being Fe and inevitable impurities; said alloy sheet after annealing before press-forming having 0.2% proof stress of 28.5 kgf/mm or less; and a degree of {211 } plane on a surface of said alloy sheet being 16% or less. And further modified similar alloy sheets are also provided.Further, a method for producing a thin Fe--Ni alloy sheet for shadow mask comprises the steps of: (a) hot-rolling of a slab into a hot-rolled alloy strip; (b) hot-rolled sheet annealing of the hot-rolled strip at 910.degree. to 990.degree. C.; (c) cold-rolling of the annealed hot-rolled strip into a cold-rolled strip; (d) recrystallization annealing of the cold-rolled strip; (e) finish cold-rolling of the recrystallization annealed strip at a finish cold reduction ratio in response to austenite grain size D(D .mu.

Abstract: A thin Fe--Ni alloy sheet for shadow mask consists essentially of Ni of 34 to 38 wt. %, Si of 0.05 wt. % or less, B of 0.0005 wt. % or less, O of 0.002 wt. % or less and N of 0.0015% or less, the balance being Fe and inevitable impurities; said alloy sheet after annealing before press-forming having 0.2% proof stress of 28.5 kgf/mm.sup.2 or less; and a degree of {211} plane on a surface of said alloy sheet being 16% or less. And further modified similar alloy sheets are also provided.Further, a method for producing a thin Fe--Ni alloy sheet for shadow mask comprises the steps of: (a) hot-rolling of a slab into a hot-rolled alloy strip; (b) hot-rolled sheet annealing of the hot-rolled strip at 910.degree. to 990.degree. C.; (c) cold-rolling of the annealed hot-rolled strip into a cold-rolled strip; (d) recrystallization annealing of the cold-rolled strip; (e) finish cold-rolling of the recrystallization annealed strip at a finish cold reduction ratio in response to austenite grain size D(D .mu.

Abstract: A fracture resistant stainless steel sheet comprises: non-metallic inclusions of Al.sub.2 O.sub.3, MnO, and SiO.sub.2 which inevitably exist in stainless steel; the non-metallic inclusions having a composition situated in a region defined by nine points in a phase diagram of a 3-component system of "Al.sub.2 O.sub.3 --MnO--SiO.sub.2 "; the stainless steel sheet having an 1.0% on-set stress of at least 1520 N/mm.sup.2 (155 kgf/mm.sup.2); the stainless steel sheet having an anisotropic difference of 1.0% on-set stress of 196 N/mm.sup.2 (20 kgf/mm.sup.2) or less; and the stainless steel sheet having a Erichsen number of at least 4.6 mm.A method for producing a high fracture resistant stainless steel sheet comprises the steps of: preparing a stainless steel strip; applying to the stainless steel strip a process of annealing--pickling --first cold rolling (CR.sub.1)--first intermediate annealing--second cold rolling (CR.sub.2)--second intermediate annealing--third cold rolling (CR.sub.

Abstract: A thin Fe-Ni alloy sheet for shadow mask consists essentially of Ni of 34 to 38 wt. %, Si of 0.05 wt. % or less, B of 0.0005 wt. % or less, 0 of 0.002 wt. % or less and N of 0.0015% or less, the balance being Fe and inevitable impurities; said alloy sheet after annealing before press-forming having 0.2% proof stress of 28.5 kgf/mm.sup.2 or less; and a degree of {211} plane on a surface of said alloy sheet being 16% or less. And further modified similar alloy sheets are also provided.Further, a method for producing a thin Fe-Ni alloy sheet for shadow mask comprises the steps of: (a) hot-rolling of a slab into a hot-rolled alloy strip; (b) hot-rolled sheet annealing of the hot-rolled strip at 910.degree. to 990.degree. C.; (c) cold-rolling of the annealed hot-rolled strip into a cold-rolled strip; (d) recrystallization annealing of the cold-rolled strip; (e) finish cold-rolling of the recrystallization annealed strip at a finish cold reduction ratio in response to austenite grain size D(D .mu.

Abstract: An alloy sheet containing Fe, Ni and Cr has an average austenite grain size of 15 to 45 .mu.m and a degree of mixed grain for austenite grain size of 4.5 to 50%; the alloy sheet has a gathering degree of the {331} plane on a surface of the alloy sheet of 8 to 35%, a gathering degree of the {210} plane of 1 to 20% and a gathering degree of the {211} plane of 2 to 20%; the degree of mixed grain is expressed by the equation: (.vertline.0.5 Dmax-D.vertline./D).times.100 (%), where D is an average austenite grain size, and Dmax is a maximum austenite grain size in said alloy sheet.

Abstract: A fracture resistant stainless steel sheet comprises: non-metallic inclusions of Al.sub.2 O.sub.3, MnO, and SiO.sub.2 which inevitably exist in stainless steel; the non-metallic inclusions having a composition situated in a region defined by nine points in a phase diagram of a 3-component system of "Al.sub.2 O.sub.3 -MnO-SiO.sub.2 "; the stainless steel sheet having an 1.0% on-set stress of at least 1520 N/mm.sup.2 (155 kgf/mm.sup.2); the stainless steel sheet having an anisotropic difference of 1.0% on-set stress of 196 N/mm.sup.2 (20 kgf/mm.sup.2) or less; and the stainless steel sheet having a punch test work load of at least 25 kgf.multidot.mm or more.A method for producing a high fracture resistant stainless steel sheet comprises the steps of: preparing a stainless steel strip; applying to the stainless steel strip a process of annealing--pickling --first cold rolling (CR.sub.1)--first intermediate annealing--second cold rolling (CR.sub.2)--second intermediate annealing--third cold rolling (CR.sub.

Abstract: An Fe--Ni alloy cold-rolled sheet excellent in cleanliness and etching pierceability prepared as specified in the claims, which consists essentially of: 30 to 45 wt. % nickel, 0.1 to 1 wt. % manganese, 0.003 to 0.03 wt. % aluminum and the balance being iron and incidental impurities comprising up to 0.4 wt. % silicon, up to 0.1 wt. % chromium, up to 0.005 wt. % carbon, up to 0.005 wt. % nitrogen, up to 0.005 wt. % sulfur, up to 0.010 wt. % phosphorus, up to 0.002 wt. % oxygen, and up to 0.002 wt. % as converted into oxygen for non-metallic inclusions. The non-metallic inclusions contain at least CaO, Al.sub.2 O.sub.3 and MgO, and the composition thereof is in a region of a melting point of at least 1,600.degree. C., which region is defined by the liquidus curve of 1,600.degree. C. in the CaO--Al.sub.2 O.sub.3 --MgO ternary phase diagram. The non-metallic inclusions have a particle size of up to 6 .mu.m.

Abstract: A stainless steel sheet essentially consisting of: 0.01 to 0.2 wt. % C, 0.1 to 2 wt. % Si, 0.1 to 2 wt. % Mn, 4 to 11 wt. % Ni, 13 to 20 wt. % Cr, 0.01 to 0.2 wt. % N, 0.0005 to 0.0025 wt. % sol.Al, 0.002 to 0.01 wt. % O, 0.009 wt. % or less S, and the balance being Fe and inevitable impurities; the sheet containing 40 to 90% martensite; and the steel sheet having a 1400 N/mm.sup.2 or more tensile stress when a tensile strain is 1.0%. The invention also provides a method for producing a stainless steel sheet comprising the steps of: applying to the steel sheet a process of first cold rolling (CR.sub.1)--first intermediate annealing--second cold rolling (CR.sub.2)--second intermediate annealing--third cold rolling (CR.sub.3)--the final annealing--fourth cold rolling (CR.sub.4)--low temperature heat treatment; the first-, second- and third cold reduction ratio being 30% to 60%; the annealing temperatures in the first-, second- and final annealing being in the range of 950.degree. C. to 1100.degree. C.

Abstract: The metallic sheet for shadow mask comprises a Fe-Ni alloy sheet having mainly of Fe and Ni; degrees of planes on a surface of the alloy sheet, the degree of {331} plane being 14% or less, the degree of {210} plane 10% or less and the degree of {211} plane 10% or less; and a ratio of degrees of planes which is {210}/[{331}+{211}] being 0.2 to 1.Another thin metallic sheet for shadow mask comprises a Fe-Ni alloy sheet having mainly of Fe and Ni; degrees of planes on a surface of the alloy sheet, that of {111} plane being 5% or less, that of {100} plane 50 to 93%, that of {110} 24% or less, that of {311} plane 1 to 10%, that of {331} 1 to 14%, that of {210} plane 1 to 10% and that of {211} plane 1 to 10%; a ratio of degrees of planes which is [{100}+{311}+{210}]/[{110}+{111}+{331}+{211}] being 0.8 to 20.

Abstract: An Fe-Ni alloy sheet for a shadow mask, which consists essentially of:nickel: from 34 to 38 wt. %,silicon: from 0.01 to 0.15 wt. %,manganese: from 0.01 to 1.00 wt. %, andthe balance being iron and incidental impurities.The surface portion of the alloy sheet has a silicon (Si) segregation rate, as expressed by the following formula, of up to 10%: ##EQU1## and a center-line mean roughness (Ra) of the alloy sheet satisfies the following formula:0.3 .mu.m<.ltoreq.Ra .ltoreq.0.7 .mu.m.The above-mentioned Fe-Ni alloy sheet is manufactured by preparing an Fe-Ni alloy sheet having the chemical composition and the silicon segregation rate as described above, and imparting a center-line mean roughness (Ra) which satisfies the above-mentioned formula onto the both surfaces of the alloy sheet by means of a pair of dull rolls during the final rolling of the alloy sheet for said preparation.