摘要:
A method of producing a high-formable, high-strength cold-rolled steel sheet from a steel slab comprising a steel with very low carbon content, one or both of Ti and Nb as a composition for forming a carbide or a nitride, and B in the range satisfying the following expression:0.001 A.ltoreq.B (wt %).ltoreq.0.003 Awherein A is a parameter determined approximately by the following expression with reference to the relation:A=P (wt %)+0.2 Mn (wt %)+0.8 Si (wt %)-0.2, subjecting the steel to a hot rolling so as to finish at a temperature between about Ar.sub.3 transformation temperature and about Ar.sub.3 transformation temperature +100 C.degree.. Thereafter, the steel is successively subjected to coiling, cold-rolling and, then, continuous annealing at temperatures between Ac.sub.1 transformation temperature +5 C.degree. and Ac.sub.1 transformation temperature +50 C.degree., and not lower than 860 C.degree.. Thus, a volume percentage of a low temperature transformation phase is controlled within the range of about 5 to about 50%, thereby obtaining a high strength cold-rolled steel sheet having a tensile strength of 38 kgf/mm.sup.2 or more, plus excellent formability and resistance to secondary working embrittlement.
摘要翻译:作为用于形成碳化物或氮化物的组合物,由含有碳含量非常低的钢,Ti和Nb中的一种或两种的钢坯制造高成形性高强度冷轧钢板的方法,以及B 在满足以下表达式的范围内:0.001A B =(wt%) = 0.003A其中A是参照以下关系式大致由下列表达式确定的参数:A = P(wt%)+ 0.2Mn (重量%)+ 0.8Si(重量%)-0.2,对钢进行热轧,以在约Ar3相变温度和约Ar3相变温度+100℃之间的温度下完成。 然后,依次进行卷取,冷轧,然后在Ac1相变温度+5℃,Ac1转变温度+50℃,不低于860℃的温度下进行连续退火。 因此,将低温相变相的体积百分比控制在约5〜约50%的范围内,得到拉伸强度为38kgf / mm 2以上,加工性优异的高强度冷轧钢板, 耐二次加工脆化。
摘要:
A low-yield-ratio high-strength hot-rolled steel sheet having the advantageous features of both conventional precipitation-strengthened steel and structure-strengthened steel and free from the drawbacks of these conventional steels, and a manufacturing method characterized in hot-rolling such a steel sheet. The steel sheet has an upper limit of C content of about 0.18 wt. %, and the lower C content limit approximately satisfies C.gtoreq.0.05+Ti/4+Nb/8 in relationship with the content of Ti and/or Nb. The steel sheet also contains about 0.5 to 2.5 wt. % Si and has a structure essentially formed of ferrite in which a carbide of Ti and/or Nb is precipitated, martensite and retained austenite.
摘要翻译:具有常规沉淀强化钢和结构强化钢的有利特征的低屈服比高强度热轧钢板,并且不存在这些常规钢的缺点,并且制造方法的特征在于热轧 钢板。 钢板的C含量的上限为约0.18重量%。 %,较低的C含量限度与Ti和/或Nb的含量大致相当于C> / = 0.05 + Ti / 4 + Nb / 8。 钢板也含有约0.5〜2.5wt。 %Si,并且具有基本上由铁素体形成的结构,其中Ti和/或Nb的碳化物沉淀,马氏体和残余奥氏体。
摘要:
A steel sheet for porcelain enameling having improved press formability and enameling properties comprises particular amounts of C, Mn, B, Cu, Al, O, N, and P or further Ti and Nb and the balance being Fe and inevitable impurities and is produced by hot rolling a slab of steel having a chemical composition as mentioned above as a starting material, cold rolling the resulting hot rolled sheet at a reduction of not less than 70%, and then subjecting the resulting cold rolled sheet to a continuous annealing at a heating temperature of not lower than 800.degree. C. but not higher than A.sub.c3 transformation point.
摘要:
In legged furniture having four or more legs and a load-receiving stage supported directly or indirectly by these legs, this legged furniture includes three main legs defining a triangular shape in a plurality of the legs and, assuming that the legged furniture is placed by using only the main legs, enabling a stable stationary attitude of the load-receiving stage, and a leg adjuster forming an extension portion of a sub leg other than the main legs and capable of expansion/contraction in a vertical direction and providing an expansion/contraction leg in cooperation with the sub leg and autonomously allows expansion or contraction of the expansion/contraction leg on the basis of a length of the main leg in accordance with the stationary attitude of the load-receiving stage.
摘要:
A display device includes: a driver including: a scanning line driver; and a signal line driver, in the pixels, a quenched state sequentially starts, for each row, in the rows of the pixels, based on the first pulse of the scanning signal that is input through the scanning line, and light-emission data from the signal line is written on the row of the pixels, based on the second pulse of the scanning signal, the driver supplies the scanning signal and the image signal to the scanning line and the signal line, respectively, such that writing the light-emission data on a first row of the pixels starts before a start of the quenched state in a last row of the pixels, and such that writing the light-emission data on the last row of the pixels ends after a start of a light-emission state in the first row of the pixels starts.
摘要:
A display device includes a plurality of luminescent pixels arranged in a display. A power supply is connected to the plurality of luminescent pixels and configured to apply a high potential and a low potential to the plurality of luminescent pixels. A voltage measurer is configured to measure, for at least one pixel from among the plurality of luminescent pixels arranged in the display, at least one potential of the high potential and the low potential applied to the at least one pixel. A voltage regulator is configured to regulate the power supply in accordance with the at least one potential measured by the voltage measurer by setting a potential difference between the high potential and the low potential applied to the at least one pixel to a predetermined potential difference.
摘要:
This invention relates to a foamable resol type phenolic resin forming material comprising a liquid resol type phenolic resin, a foaming agent, a foam stabilizer, an additive and an acid curing agent, said additive containing a nitrogen-containing bridged cyclic compound and said foam stabilizer containing a chlorinated aliphatic hydrocarbon compound having 2 to 5 carbon atoms, and a phenolic resin foam product obtained by foaming and curing this forming material.
摘要:
The objective of the invention is to provide nucleic acid derivatives with designated compounds introduced specifically into the base of nucleic acids. A DNA or RNA, or a nucleic acid molecular weight marker, wherein a designated compound (R), which is selected from any one of dyes, fluorescent dyes, RI labeled substances, and compounds capable of linking specifically to other compounds, is introduced at the N−3 position of a thymine base or uracil base in which (R′) at Position 1 is other than hydrogen atom.
摘要:
The object of the present invention is to provide an expandable or foamable resol-type phenolic resin forming material that gives a phenolic resin foamed material or article which is excellent in strength and improved in brittleness and which has a high pH as compared with conventional materials or articles and has an excellent anti-corrosion property against a contact member, and a phenolic resin foamed material or article having the above properties, obtained by foaming the same, which are a foamable resol type phenolic resin forming material comprising a liquid resol type phenolic resin, a blowing agent, a foam stabilizer, an additive and an acid curing agent, said blowing agent comprising an organic non-reactive blowing agent and said additive comprising a nitrogen-containing bridged cyclic compound, and a phenolic resin foamed material or article obtained by foaming this forming material.
摘要:
Test signals are recorded on a prescribed area in an optical disc. The prescribed area is scanned by a laser beam while the power of the laser beam is changed among different DC erasing values. The different DC erasing values are assigned to the recorded test signals, respectively. The recorded test signals are reproduced from the prescribed area to obtain reproduced signals. Parameter values of the respective reproduced signals are detected. The detected parameter values correspond to the different DC erasing values, respectively. Among the detected parameter values, a detected parameter value is decided which matches a target. One corresponding to the decided parameter value is selected from the different DC erasing values. A prescribed coefficient and the selected DC erasing value are multiplied to calculate an optimum level of an erasing power of the laser beam.