-
公开(公告)号：US4131450A
公开(公告)日：1978-12-26
申请号：US876274
申请日：1978-02-09
申请人： Yuichi Saito , Masayuki Iijima , Osamu Mayama
发明人： Yuichi Saito , Masayuki Iijima , Osamu Mayama
CPC分类号： C22C1/0433 , B22F9/22
摘要： A main raw material powder comprising cobalt oxide powder, chromium oxide powder and carbon powder is added with at least one metal oxide powder selected from the group consisting of manganese oxide powder, vanadium oxide powder, titanium oxide powder, tantalum oxide powder, niobium oxide powder, boron oxide powder, hafnium oxide powder, tungsten oxide powder, molybdenum oxide powder, iron oxide powder, nickel oxide powder and copper oxide powder; these powders are then mixed and pulverized to prepare a mixed powder; said mixed powder is then reduced by heating under vacuum or in a reducing atmosphere to obtain a reduced sponge-like mass; said sponge-like mass is finely pulverized, thereby manufacturing a cobalt-base reduced powder.A cobalt-base sintered alloy, produced by using said cobalt-base reduced powder thus manufactured as the material powder, has a relatively wide range of diffusion sintering temperatures applicable at the time of sintering thereof and has furthermore a high sintered density.
摘要翻译： 添加有氧化钴粉末，氧化铬粉末和碳粉末的主要原料粉末，添加至少一种选自氧化锰粉末，氧化钒粉末，氧化钛粉末，氧化钽粉末，氧化铌粉末的金属氧化物粉末 ，氧化硼粉末，氧化铪粉末，氧化钨粉末，氧化钼粉末，氧化铁粉末，氧化镍粉末和氧化铜粉末; 然后将这些粉末混合并粉碎以制备混合粉末; 然后通过在真空或还原气氛中加热来还原所述混合粉末以获得减少的海绵状物质; 所述海绵状物料被细粉碎，由此制造钴基还原粉末。
-
公开(公告)号：US4089682A
公开(公告)日：1978-05-16
申请号：US744783
申请日：1976-11-24
申请人： Yuichi Saito , Osamu Mayama
发明人： Yuichi Saito , Osamu Mayama
CPC分类号： C22C1/0433
摘要： A cobalt-base sintered alloy which comprises: being manufactured from a reduced powder by the conventional powder metallurgy process with said reduced powder as a material powder, said reduced powder being prepared by simultaneously reducing a mixed powder consisting of powders of oxides of elements constituting said sintered alloy with a carbon powder added and mixed therein, and said reduced powder consisting of powders of said constituent elements and powders of carbides thereof; and consisting essentially of, in weight percentage:Chromium from 15.0 to 35.0%Tungsten from 3.0 to 19.0%Nickel from 0.2 to 12.0%Molybdenum from 0.1 to 15.0%Iron from 0.05 to 5.00%Titanium from 0.05 to 2.00%Silicon from 0.05 to 1.50%Manganese from 0.05 to 1.00%Carbon from 0.2 to 3.5%AndThe balance cobalt and incidental impurities.The above-mentioned cobalt-base sintered alloy, also containing, in weight percentage, from 0.05 to 1.00% boron.These cobalt-base sintered alloys provide a relatively wide range of sintering temperatures applicable in the manufacture thereof, and have furthermore a high sintered density of at least 95% of the theoretical value and are excellent in machinability, heat resistance, wear resistance and corrosion resistance.
摘要翻译： 一种钴基烧结合金，其特征在于，包括：通过常规粉末冶金方法用所述还原粉末作为原料粉末，由还原粉末制造，所述还原粉末通过同时还原由构成所述的粉末的元素的氧化物粉末组成的混合粉末 烧结合金，其中加入和混合碳粉，所述还原粉末由所述组成元素的粉末和其碳化物粉末组成; 并基本上由重量百分比组成：
-
公开(公告)号：US4093454A
公开(公告)日：1978-06-06
申请号：US744932
申请日：1976-11-24
申请人： Yuichi Saito , Osamu Mayama
发明人： Yuichi Saito , Osamu Mayama
CPC分类号： C22C1/0433 , B22F9/20 , C22C32/0052 , Y10S75/95
摘要： A nickel-base sintered alloy which comprises: being manufactured from a reduced powder by the conventional powder metallurgy process with said reduced powder as a material powder, said reduced powder being prepared by simultaneously reducing a mixed powder consisting of powders of oxides of elements constituting said sintered alloy with a carbon powder added and mixed therein, and said reduced powder consisting of powders of said constituent elements and powders of carbides thereof; and consisting essentially of, in weight percentage:______________________________________ chromium from 10.0 to 35.0 % tungsten from 0.5 to 15.0 % cobalt from 0.2 to 12.0 % molybdenum from 0.1 to 20.0 % iron from 0.1 to 20.0 % titanium from 0.05 to 2.00 % silicon from 0.05 to 1.50 % manganese from 0.05 to 1.00 % carbon from 0.1 to 3.5 % ______________________________________ And the balance nickel and incidental impurities.The above-mentioned nickel-base sintered alloy, also containing, in weight percentage, from 0.05 to 1.00% boron and from 0.1 to 2.0% aluminum.These nickel-base sintered alloys provide a relatively wide range of sintering temperatures applicable in the manufacture thereof, and have furthermore a high sintered density of at least 95% of the theoretical value and are excellent in machinability, heat resistance, wear resistance and corrosion resistance.
摘要翻译： 一种镍基烧结合金，其特征在于，包括：通过常规粉末冶金方法用所述还原粉末作为原料粉末由还原粉末制造，所述还原粉末是通过同时还原由构成所述粉末的元素的氧化物粉末组成的混合粉末制备的， 烧结合金，其中加入和混合碳粉，所述还原粉末由所述组成元素的粉末和其碳化物粉末组成; 并且以重量百分数计：10.0％至35.0％的铬} 0.5％至15.0％的钨）0.2％至12.0％的钴，0.1％至20.0％的铁，0.1％至20.0％的钛，0.05至2.00 ％）硅0.05％〜1.50％}锰，0.05〜1.00％}碳0.1〜3.5％}和平衡镍和偶发性污染物。
-
4.发明授权
公开(公告)号：US5031878A
公开(公告)日：1991-07-16
申请号：US613243
申请日：1990-11-14
申请人： Yoshimi Ishikawa , Osamu Mayama
发明人： Yoshimi Ishikawa , Osamu Mayama
CPC分类号： C22C33/0292 , F01L3/22 , F02B1/04 , F02B3/06
摘要： This invention relates to valve seats that are made of a sintered Fe-base alloy that has high wear resistance, that is less hostile to valves and that hence is suitable for use with internal combustion engines such as diesel engines and gasoline engines, particularly those having high power outputs, the sintered Fe base alloy comprising a sintered Fe base alloy substrate having such a structure that hard particles A that contain 25-45% Cr, 20-30% W, 20-30% Co, 1-3% C, 0.2-2% Si and 0.2-2% Nb, with the balance being Fe and incidental impurities, and hard particles B that contain 55-65% Co, 25-32% Cr, 7-10% Mo and 1.5-3.5% Si, with the balance being Fe and incidental impurities, are dispersed in a total amount of 10-25% in an Fe base alloy matrix that contains 1-3% Cr, 0.5-3% Mo, 0.5-3% Ni, 2-8% Co, 0.6-1.5% C and 0.2-1% Nb, with the balance being Fe and incidental impurities, and which has a structure that is mainly composed of a pearlitic and a bainitic phase, all the percents being on a weight basis.
摘要翻译： 本发明涉及一种由具有高耐磨性的烧结Fe基合金制成的阀座，其对阀的敌对性较差，因此适用于内燃机如柴油发动机和汽油发动机，特别是具有 高功率输出，烧结的Fe基合金包括烧结的Fe基合金基底，其具有如下结构，即含有25-45％Cr，20-30％W，20-30％Co，1-3％C， 0.2-2％Si和0.2-2％Nb，余量为Fe和杂质，含有55-65％Co，25-32％Cr，7-10％Mo和1.5-3.5％Si的硬质粒子B 在Fe基合金基质中分散Fe和偶然杂质，其总量为10-25％，其中含有1-3％Cr，0.5-3％Mo，0.5-3％Ni，2-8 ％Co，0.6-1.5％C和0.2-1％Nb，余量为Fe和附带杂质，其主要结构主要由珠光体和贝氏体组成，所有百分比均为 重量基础。
-
5.发明授权
公开(公告)号：US4836848A
公开(公告)日：1989-06-06
申请号：US103925
申请日：1987-10-02
申请人： Osamu Mayama , Yoshimi Ishikawa
发明人： Osamu Mayama , Yoshimi Ishikawa
CPC分类号： C22C33/0278 , C22C33/0228 , F01L3/02
摘要： An Fe-base sintered alloy for valve seats for use in internal combustion engines and a method of manufacturing the same are provided. The alloy consists essentially of 0.6 to 1.3% C, 1 to 5% Cr, 4 to 15% Mo, 0.5 to 2% Ni, 2 to 8% Co, 0.2 to 2% Nb, 0.2 to 2% at least one lubricating component selected from the group consisting of a CaF.sub.2 and BaF.sub.2 and the balance of Fe and inevitable impurities. Starting powders are blended into the same composition as above, and mixed into a mixed powder. The mixed powder is pressed into a green compact. Then, the green compact is presintered, hot forged, sintered, and, if required, further heat treated, in sequence to be formed into an Fe-base sintered alloy having a structure wherein particles of the at least one lubricating component and hard particles of other components are dispersed in a matrix formed principally of a pearlite phase. The resulting alloy possesses a density of at least 7.3 g/cm.sup.3 and Rockwell handness of 30-50 in Rockwell Scale C, and hence exhibits excellent abrasion resistance as well as excellent lubricity.
摘要翻译： 提供了一种用于内燃机的阀座的Fe基烧结合金及其制造方法。 该合金基本上由0.6-1.3％的C，1至5％的Cr，4至15％的Mo，0.5至2％的Ni，2至8％的Co，0.2至2％的Nb，0.2至2％的至少一种润滑组分 选自由CaF 2和BaF 2组成的组，余量为Fe和不可避免的杂质。 将起始粉末混合成与上述相同的组成，并混合成混合粉末。 将混合粉末压成绿色压块。 然后，将坯料预烧结，热锻，烧结，并且如果需要，进一步热处理，依次形成Fe基烧结合金，其具有以下结构：其中至少一种润滑组分的颗粒和 其他组分分散在主要由珠光体相形成的基质中。 所得合金在洛氏硬度计C中具有至少7.3g / cm 3的密度和30-50的洛氏硬度，因此表现出优异的耐磨性以及优异的润滑性。
-
-
-
-
搜索结果
5 条记录 (耗时 0.012 秒)
