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    • 5. 发明申请
    • DEAD-SOFT HIGH-CARBON HOT-ROLLED STEEL SHEET AND PROCESS FOR PRODUCING THE SAME
    • 脱碳高碳热轧钢板及其制造方法
    • WO2007043318A9
    • 2007-06-07
    • PCT/JP2006318893
    • 2006-09-19
    • JFE STEEL CORPKIMURA HIDEYUKIFUJITA TAKESHINAKAMURA NOBUYUKIUEOKA SATOSHIAOKI NAOYAMITSUZUKA KENICHI
    • KIMURA HIDEYUKIFUJITA TAKESHINAKAMURA NOBUYUKIUEOKA SATOSHIAOKI NAOYAMITSUZUKA KENICHI
    • C22C38/00B21B1/26B21B3/00C21D9/46C22C38/06C22C38/14
    • C22C38/02C21D1/32C21D6/008C21D8/0263C21D9/46C22C38/04C22C38/12C22C38/14C22C38/18C22C38/32
    • A dead-soft high-carbon hot-rolled steel sheet which contains 0.2-0.7% C, 0.01-1.0% Si, 0.1-1.0% Mn, up to 0.03 P, up to 0.035% S, up to 0.08% Al, and up to 0.01%N and optionally further contains 0.0010-0.0050% B and 0.05-0.30% Cr, with the remainder being Fe and unavoidable impurities. The structure has an average ferrite grain diameter of 20 µm or larger, the proportion of ferrite grains having a grain diameter of 10 µm or larger being 80% by volume or higher, and has an average carbide grain diameter of 0.10-2.0 µm, excluding 2.0 µm. After rough rolling, the web is subjected to finish rolling at a finishing temperature of (Ar 3 -20°C) or higher so as to result in a draft in the final pass of 10% or higher. Within 2 seconds after the finish rolling, primary cooling is conducted, in which the web is cooled to a cooling termination temperature of 600°C or lower at a cooling rate exceeding 120 °C/sec. This web is held at a temperature of 600°C or lower in secondary cooling, subsequently wound up at a temperature of 580°C or lower, washed with an acid, and then subjected to spheroidizing annealing at a temperature which is not lower than 680°C but is not higher than transformation point Ac 1 to thereby produce the target steel sheet.
    • 一种死软的高碳热轧钢板,其含有0.2-0.7%C,0.01-1.0%Si,0.1-1.0%Mn,至多0.03P,至多0.035%S,至多0.08%Al,以及 高达0.01%的N,任选地还含有0.0010-0.0050%B和0.05-0.30%的Cr,其余的是Fe和不可避免的杂质。 该结构的平均铁素体晶粒直径为20μm以上,粒径为10μm以上的铁素体晶粒的比例为80体积%以上,平均碳化物粒径为0.10〜2.0μm,不包括 2.0μm。 粗轧后,在(Ar 3℃-20℃)以上的终轧温度下进行精轧,最终的通过量为10%以上。 在精轧后2秒钟内,进行一次冷却,其中以超过120℃/秒的冷却速度将幅材冷却至600℃以下的冷却终止温度。 在二次冷却下,将该纤维网保持在600℃以下的温度,然后在580℃以下的温度下,用酸洗涤,然后在不低于680℃的温度下进行球化退火 ℃,但不高于相变点Ac 1,从而制造目标钢板。
    • 8. 发明专利
    • ELECTRO-ACOUSTIC TRANSDUCER CONTROLLED BY BINARY CODED NUMERICAL VALUE
    • JPH06327086A
    • 1994-11-25
    • JP14711893
    • 1993-05-14
    • FUJITA TAKESHI
    • FUJITA TAKESHI
    • H03G3/02H04R3/00
    • PURPOSE:To provide binary coded acoustic output by directly driving an output element by a binary coded numerical value for the acoustic output and obtaining output just by the combination of the elements and resolution of bits. CONSTITUTION:Analog input is inputted to an A/D converter 1, the output is adjusted in a voltage or current amplification part 2 and the acoustic output is obtained from an electro-acoustic transducer 4 by a pulse amplification part 3. Further, if detailed explanation is to be added, the general A/D converter 1 and an interface 2 for transmitting the binary coded numerical signals of the output to the pulse amplification part 3 are used. Then, in the pulse amplification part 3, an output value is decided with the combination of the element number and the voltage value of an acoustic output element 4 or a power source part for setting the output by the weight {1, 2, 4, 8, to (n) fold} of the inputted bits. In such a manner, operations are performed within the range of the constraint of the resolution of digitized signals. Thus, the output same as a digital value can be obtained and sure reproducibility can be obtained.
    • 9. 发明专利
    • WATERCRESS POWDER FOR FOOD ADDITIVE
    • JPS62239943A
    • 1987-10-20
    • JP8298086
    • 1986-04-10
    • FUJITA TAKESHI
    • FUJITA TAKESHI
    • A23B7/02A23B7/12A23L19/00
    • PURPOSE:To produce watercress powder having high preservability and free from disagreeable taste as a food additive, without deteriorating nutrient value of original watercress, by steaming a watercress and pulverizing after drying. CONSTITUTION:Harvested watercress is washed with water and roughly cut or cut and washed with water. The processed watercress is steamed at about 100 deg.C and dried by spontaneous drying or using a drying machine. In the case of rapidly drying the watercress by a dryer, the heating temperature is preferably about 60-80 deg.C. The dried watercress is pulverized e.g. by grinding. The obtained powder has mitigated characteristic bitter taste and strong odor of watercress and can be widely utilized e.g. by mixing with other materials or by scattering on a food. When the characteristic bitter taste and odor of watercress is to be retained to an extent, the steaming step is omitted and the watercress is pulverized after freeze vacuum drying. Stable supply of the processed watercress can be carried out in high yield all the year round by either of the above processes.
    • 10. 发明专利
    • MELTING METHOD IN ELECTRIC STEEL MAKING
    • JPS55125219A
    • 1980-09-26
    • JP3286579
    • 1979-03-20
    • FUJITA TAKESHI
    • FUJITA TAKESHISHIMA MITSUO
    • C21C5/52
    • PURPOSE:To reduce the melting time of raw material by spraying the melting accelerator containing a large amount of volatiles on the furnace bottom after tapping, charging the raw material composed primarily of iron scrap thereon then porforming current supplying and O2 blowing. CONSTITUTION:Semi-coke 65%, anthracite coal 25-50%, iron powder 3-7% and lignin binder 3-5% based on weight are mixed and molded to prepare the melting accelerator containing 15% or more of volatiles. Next, this melting accelerator is sprayed on the furnace bottom after tapping, after which the raw material composed primarily of iron scrap is placed thereon, thence current supplying and O2 blowing are done. As a result of this, the volatiles in the melting accelerator are first evaporation-ignited to evolve heat and this together with the arc heat from the upper part promote the formation of the molten metal pool in the hearth, thereby preventing the over-oxidation of iron scrap and eventually reducing the melting time and power consumption. Here, the amount of spraying of the melting accelerator is 2-6kg per ton of iron scrap.