95results about How to "Effective pinning" patented technology

The invention discloses a preparing method of a high-strength and high-plasticity heat-resistant magnesium alloy with an adjustable LPSO structure and a nanometer precipitated phase. The preparing method comprises the following steps: A, cutting a Mg-Y-Zn alloy ingot, placing the alloy ingot in an equal-channel angular pressing (ECAP) die, carrying out thermal insulation at 280-330DEG C, and then carrying out ECAP treatment on the ingot so as to obtain an ultra-fine crystal bulk; and B, placing the ultra-fine crystal bulk in a thermal treatment furnace, carrying out thermal insulation at 350-400DEG C for 2-8 hours, carrying out quenching, then placing the ultra-fine crystal bulk in a vacuum oven, carrying out thermal insulation at 200-225DEG C for 22-30 hours, and carrying out quenching so as to obtain ultra-fine crystal magnesium alloy containing an LPSO structure and a nanometer precipitated phase. The high-plasticity ultra-fine crystal rare-earth magnesium alloy containing the LPSO structure is obtained through ECAP processing. Besides, by using double heat treatment to adjust the LPSO structure in the alloy, introducing the nanometer precipitated phase and utilizing the organic combination and unification of three enhancing factors, such as fine-crystal enhancement, LPSO phase enhancement and nanometer precipitated phase enhancement, the heat-resistant magnesium alloy with high strength, high plasticity and high creep resistance is obtained.

Provided is an oxide superconducting wire material, wherein pinning of magnetic flux, under an environment in which magnetic field is applied, can be conducted efficiently towards any magnetic-field applying angle direction, to secure a high superconductive property. The oxide superconducting wire material (100) is provided with a metal substrate (110), an intermediate layer (120) formed upon the metal substrate (110), and a REBaCuO-system superconductive layer (140) formed upon the intermediate layer (120). RE comprises one or more elements selected from Y, Nd, Sm, Eu, Gd, and Ho. Oxide particles including Zr are distributed within the superconductive layer (140) as magnetic-flux pinning points (145), and the mole ratio (y) of Ba included within the superconductive layer (140) is, when the mole ratio of Zr is assumed to be x, within a range of (1.2+ax)@y@(1.8+ax), wherein 0.5@a@2.

The invention discloses a low-cost X80 straight seam welded pipe and a manufacturing method thereof. Chemical components of the low-cost X80 straight seam welded pipe include, by weight percent, 0.039%-0.079% of C, 0.16%-0.26% of Si, 1.33%-1.83% of Mn, smaller than or equal to 0.017% of P, smaller than or equal to 0.0046% of S, 0.14%-0.24% of Cr, 0.019%-0.059% of Nb, 0.019%-0.039% of V, 0.0051-0.028% of Ti, 0.011%-0.057% of Al, 0.13%-0.28% of Ni and the balance Fe and a trace of inevitable impurities. According to technological characteristics, the soaking temperature ranges from 1120 DEG C to 1220 DEG C, two-stage control rolling is adopted, and the rolling temperature in a recrystallization area ranges from 950 DEG C to 1200 DEG C; second-stage rolling is conducted in a non-recrystallization area, and the air cooling ending temperature ranges from 650 DEG C to 750 DEG C; and the laminar cooling speed ranges from 5 DEG C / s to 25 DEG C / s, JCO or UO is adopted for pipe manufacturing, the expanding rage e is larger than or equal to t / D, and the maximum value of the expanding rate is 2.5%. The low-cost X80 straight seam welded pipe and the manufacturing method thereof have the beneficial effects that a low-grade steel plate is used for manufacturing the high-grade X80 straight seam submerged arc welding pipe, strength and plasticity indexes are good, and the production cost is reduced.

The invention relates to a method for producing an X80 grade large deformation resistant pipeline steel medium plate. The economic component design with low carbon is adopted to perform controlling and rolling stages on ingot, namely rolling the grain refined zone and the non grain refined zone. The method comprises: firstly, air cooling and relaxing after finished rolling is performed so that the temperature of a steel plate before entering water and cooled is reduced below the phase change point Ar3 between 30 and 50 DEG C, and 50 to 70 percent of austenite in the relaxing process is converted into proeutectoid ferrite; and secondly, laminar flow cooling is performed on the steel plate within the range of the cooling speed between 20 and 35 DEG C per second, the finished cooling temperature is controlled within the range of between 250 and 400 DEG C; and in the water cooling process, the remaining austenite is converted into bainite structure, and proeutectoid ferrite + bainite double-phase structure is obtained. The intensity and the plasticity index of the finished product satisfy the following requirements: the yield strength Rt0.5 is 530 to 630MPa, the intensity of tension Rm is 625 to 825 MPa, the yield ratio Rt0.5 / Rm is less than or equal to 0.80, and the homogeneous deformation tensile stretch UEL is more than or equal to 10 percent.

The invention provides a high-rare-earth-content high-intensity heat-resistance aluminum alloy conducting wire and a preparation method thereof. The conducting wire is prepared from the following elements in percentage by weight: 0.1 to 2 percent of Zr, 2 to 5 percent of La, 2 to 6 percent of Ce, 2 to 6 percent of Y, 0.05 to 0.20 percent of Fe, 0.05 to 0.10 percent of Si, smaller than or equal to0.10 percent of other impurity elements and the balance of aluminum. The invention also provides the preparation method of the conducting wire. The tensile intensity of the heat-resistance aluminum alloy conducting wire reaches 320 MPa; the conductivity can reach 60-percent IACS; the long-time operation temperature can reach 300 DEG C; the conducting wire can withstand the 1h heating checking operation at 280 DEG C; the intensity ascends instead of descending. After the 1h heating checking operation at 400 DEG C, the intensity residue rate reaches higher than 97 percent.

The invention pertaining to the technical field of high-strength steel plates for welding provides a method of improving the heat-affected zone toughness of a steel plate under a large heat input welding condition.CGHAZ toughness of a steel plate under a large heat input welding condition is improved on the basis of a CaO-MnS mechanism.HAZ toughness can be improved effectively by adding Ca into C-Mn steel, wherein, the Ca performs deoxidization through a gas-liquid interface for generating reactions of [Ca]+[O]=(CaO) and [Ca]+[S]=(CaS); fine dispersed nano-scale mass points of CaO and CaS areformed, MnS adheres to the mass points go grow to form a rotundity shape, and when the Ca content achieves to 50-60ppm, the HAZ toughness can be improved effectively.The invention has advantages of effective austenite grain boundary forming by nails, grains being fined and the CGHAZ toughness being improved.