摘要:
An anticorrosive bellows made of stainless steel containing 0.10% by weight or less of C, 2.5-5% by weight of Si, 2% by weight or less of Mn, 15-20% by weight of Cr, 10-22% by weight of Ni, 10 times or more as much as the C content but at most 2.5% by weight of at least one element selected from the group consisting of Ta and Zr, and the remainder consisiting substantially of Fe shows excellent corrosion resistance even under strongly corrosive circumstances, e.g. fuming or concentrated nitric acid. Said stainless steel has improved workability, weldability and endurance and the produced bellows can be used as a bellows valve, a bellows joint, and the like.
摘要:
A method for improving surface defect of specific steel resistant to concentrated nitric acid, wherein the specific steel in a molten state, either a stainless steel comprising C.ltoreq.0.1 wt %, 2.5.ltoreq.Si.ltoreq.5 wt %, Mn.ltoreq.2 wt %,15.ltoreq.Cr.ltoreq.20 wt %, 10.ltoreq.Ni.ltoreq.22 wt %,C.times.10.ltoreq. at least one of Nb, Ta and Zr.ltoreq.2.5 wt %,the balance being iron and inevitable impurities,or a high-silicon-nickel-chromium steel comprisingC.ltoreq.0.03 wt %, 5.ltoreq.Si.ltoreq.7 wt %, Mn.ltoreq.10 wt %,7.ltoreq.Cr.ltoreq.16 wt %, 10.ltoreq.Ni.ltoreq.19 wt %,C.times.4.ltoreq. at least one of Nb, Ta and Zr.ltoreq.2 wt %,the balance being iron and inevitable impurities,is admixed with titanium (0.05.ltoreq.Ti.ltoreq.0.2 wt %) when producing said steel.
摘要:
Corrosion of an SO.sub.2 regeneration apparatus is prevented upon suspending its operation by introducing an inert gas into the apparatus to produce an air concentration of not more than 5% by volume therein and maintaining that concentration while reducing temperature in the apparatus to room temperature.
摘要:
A high-silicon-nickel-chromium steel resistant to concentrated nitric acid with a good workability and a good weldability, comprisingcarbon in an amount of not more than 0.03% (C.ltoreq.0.03%),silicon in an amount of from more than 5% to not more than 7% (5%
摘要:
A power-supply control device includes a transition section, a body-capable-of-movement detection section, a return control section, a reference-time-period setting section, a state determination section, and a correction section. The transition section shifts a state of an operation target section from one state to another state among a power-supply state and multiple types of non-power-supply states. The body-capable-of-movement detection section detects a body capable of movement. The return control section controls the transition section so as to return the state of the operation target section to the power-supply state. The reference-time-period setting section sets a reference time period. The state determination section checks a state of detection of the body capable of movement after the reference time period elapses. The correction section corrects the reference time period on the basis of detection position information.
摘要:
A safety control apparatus positively discriminates between an object and a person through the detection of subtle physical movement corresponding to the heart activity and the breathing unique to the life activity of the human body from a output signal of a vibration sensor disposed on a seat so as to accurately decide whether or not a person is present. The maintenance of the safe operation of the moving vehicle can be realized. The starting of the moving vehicle is inhibited if the reserved seat is determined to be unoccupied in accordance with the decision result. In the case where the person is present, the moving of the vehicle is not started before the engagement of the seat belt has been detected.
摘要:
A method for descaling the inside of a jacket of a glass-lined instrument by using a cleaning solution containing a detergent and an inhibitor is disclosed, wherein the amount of hydrogen permeated through the matrix of the instrument to the lining glass side is estimated by measuring a rate of hydrogen permeation through the jacket material or a test piece fitted to the circulation line of the cleaning solution and inserting the measured value into a previously established relationship between thickness of a steel plate and a rate of hydrogen permeation, and the concentrations of the detegent and the inhibitor in the cleaning solution, the descaling temperature or the descaling time is controlled so that the rate of hydrogen permeation through the matrix may not exceed 30 ml per m.sup.2 of the matrix during the descaling. A relatively large amount of scales can be rapidly and easily removed without causing breaking of the lining glass due to hydrogen permeation while minimizing corrosion of the matrix.
摘要:
The present invention provides an information processing apparatus including: a first control section that, when execution of printing at a printing device connected via a communications section is instructed, performs control to display at a display section a print settings screen for making settings relating to the printing; a calculation section that calculates an estimated value of power consumption that the printing device will consume if the printing is executed on the basis of the settings relating to printing; and a second control section that, when a pre-specified operation is performed at the print settings screen, performs control to display the estimated value of power consumption and display at the display section an energy saving settings screen for making, of the settings relating to printing, settings relating to energy saving.
摘要:
A descaling method for the inside of jackets of glass-lined instruments is disclosed, comprising using a hydrochloric acid solution comprising at least one compound selected from the group consisting of laurylamine, lauryldimethylamine and propargyl alcohol, with or without tin(II) chloride.
摘要:
This invention relates to a welding material for welding a high-Si austenite stainless steel, capable of ensuring a high corrosion resistance of the weld metal in hot nitric acid of high concentration, while maintaining a toughness of the weld metal not smaller than 2 Kg-m/cm.sup.2, and the method of application therefor. The welding material has a composition containing not greater than 0.015% of C, 5 to 7% of Si, not greater than 2% of Mn, 15 to 20% of Cr, 10 to 22% of Ni, not greater than 0.02% of N, not greater than 0.45% of one or both of Nb and Ta, and the balance substantially Fe and inevitable impurities the sum of C and N contents is selected to be not greater than 0.03% and the sum of Nb and Ta contents is selected to be not smaller than 15.times.(C+N)%. The Ni-balance value given by the following formula ranges between -4 and -2.Ni balance value=% Ni+30(%C+%N)+0.5(%Mn)-1.1(%Cr+1.5.times.%Si)+8.2
摘要翻译:本发明涉及一种用于焊接高Si奥氏体不锈钢的焊接材料,其能够确保焊接金属在高浓度热硝酸中的高耐蚀性,同时保持焊接金属的韧性不小于2Kg- m / cm 2及其应用方法。 该焊接材料的组成为:C:不大于0.015%,Si:5〜7%,Mn:2%以下,Cr:15〜20%,Ni:10〜22%,Ni: N,不大于Nb和Ta中的一种或两种的0.45%,余量基本上为Fe和不可避免的杂质,C和N含量的总和被选择为不大于0.03%,并且选择Nb和Ta的总和 不小于15x(C + N)%。 由以下公式给出的Ni平衡值范围介于-4和-2之间。 Ni平衡值=%Ni + 30(%C +%N)+0.5(%Mn)-1.1(%Cr + 1.5x%Si)+8.2