36results about How to "Has a yield strength" patented technology

The invention relates to a high-strength hot rolled steel plate for counter enameling and a manufacturing method thereof. The high-strength hot rolled steel plate for counter enameling comprises the following smelting components in weight percent: 0.012-0.03 percent of carbon (C), not greater than 0.10 percent of silicon (Si), 0.55-1.0 percent of manganese (Mn), 0.05-0.11 percent of phosphorus (P), not greater than 0.006 percent of sulfur (S), not greater than 0.005 percent of nitrogen (N), 0.08-0.20 percent of titanium (Ti), 0.005-0.055 percent of aluminum sulfide (Als), 5-15 percent of Ti/C and the balance of ferrum and inevitable impurities, wherein more than one or two of vanadium, boron (B), copper (Cu) and chromium (Cr) is selectively added. The manufacturing method comprises the following steps: producing a plate blank through continuous casting; evenly heating the plate blank to 1180-1260 DEG C; then, removing phosphorous with high-pressure water and carrying out rough rolling to prepare an intermediate blank; carrying out 5-7-pass finish rolling to target thickness; carrying out laminar flow cooling to 570-680 DEG C and coiling. The high-strength hot rolled steel plate for the counter enameling has no phosphorus explosion; the yield strength is higher than 280MPa after the high-strength hot rolled steel plate for the counter enameling is enameled under the conditions that the temperature is 800-920 DEG C and the thickness is greater than 8mm. The high-strength hot rolled steel plate for the counter enameling is suitable for roll forming, bend forming and simple punch forming and is a reliable special steel plate material for a counter enameling assembly structure.

The invention discloses a method for preparing a centrifugal nodular cast iron pipe. The method discloses the preparation process of the centrifugal nodular cast iron pipe of high quality, the preparation process comprises a series of operation processes of molten iron preparation, nodulizing of molten iron, centrifugal casting, annealing treatment, pipe body shaping and coating protection and the like. The method is suitable for preparation of cast iron pipes of the specification of DN 80-1000 mm, the application range is wide, and the preparation process is simple. The cast iron pipe prepared through the method has the characteristics of being high in appearance quality, fine in material structure, high in production efficiency, long in service life and the like, and compared with existing steel pipes and gray iron pipes, the cast iron pipe prepared through the method has better decay resistance and tensile property.

In producing a steel sheet for cans, a steel sheet which consists substantially of ferrite single-phase structure and has a mean grain diameter of 7[mu]m or below and which exhibits a yield strength of 500MPa or above, a yield ratio of 0.9 or above, a total elongation of 10% or above, and deltar of -0.50 to 0 after coating and baking is produced by incorporating C: 0.01 to 0.12%, Si: 0.005 to 0.5%, Mn: 0.3 to 1.5%, P: 0.005 to 0.2%, Al: 0.10% or below, N: 0.012% or below, and Nb: 0.005 to 0.10% and combining solid solution hardening, precipitation hardening, and grain refinement hardening. The hot rolling is conducted principally under the conditions of FT of 870 DEG C or above, cooling rate after hot rolling of 40 DEG C/s or below, and CT of 620 DEG C or above to adjust the mean grain size of a hot-rolled sheet serving as material for the steel sheet for cans to 6[mu]m or above.

The invention discloses a hot-rolled steel plate for enameled high-strength double-face enamel and a manufacturing method of the steel plate. When the thickness of the steel plate is smaller than or equal to 8 mm, the chemical components in the steel comprise, by weight percent, 0.030% to 0.070% of C, not larger than 0.10% of Si, 0.60% to 1.5% of Mn, 0.05% to 0.11% of P, not larger than 0.006% of S, not larger than 0.008% of N, 0.09% to 0.21% of Ti, 0.03% to 0.07% of Nb, 0.015% to 0.060% of V, 0.005% to 0.055% of Als, 3.0% to 6.0% of Ti/C and the balance is Fe and inevitable impurities, when the thickness of the steel plate is larger than 8 mm, B is added, the content of the B ranges from 0.0005% to 0.005%,. The casting blank with the above component is heated to 1180 DEG C to 1250 DEG C, after soaking, high-pressure water descaling and rough rolling cogging are carried out, the finish rolling cogging temperature ranges from 880 DEG C to 1100 DEG C, the finish rolling temperature ranges from 880 DEG C to 930 DEG C, rapid cooling to the reeling temperature is achieved with the cooling speed larger than or equal to 30 DEG C/S after rolling, and the reeling temperature ranges from 630 DEG C to 700 DEG C.

The invention relates to a manufacturing method for a seamless pipe, and in particular to a manufacturing method for a high manganese steel seamless pipe with high strength and corrosion resistance. The manufacturing method for the high manganese steel seamless pipe comprises the following steps that a high manganese steel ingot comprising, by weight percentage (%), 0.08-0.60% of C, 0.10-3.60% of Si, 15.00-28.00% of Mn, 0.02-4.50% of Al, no more than 0.045% of P, no more than 0.045% of S, 0.01-0.30% of Nb, 0.001-0.040% of N, 0.01-0.20% of Ti, 0.01-0.20% of V, and the balance Fe and inevitable impurities is kept warm for 6-8 hours at the temperature of 1150-1250 DEG C, the steel ingot is hot-forged into a cylindrical blank at the temperature of 850-1150 DEG C, then the cylindrical blank is covered with a heat preservation cover quickly for slow cooling, and the cylindrical blank is air-cooled to the room temperature 48 hours later by hoisting the cover away.

The invention discloses an industrial preparing method of a water-cooling metal mold centrifugal nodular cast iron pipe. According to the method, pig iron is used, the technologies of molten iron preparing, molten iron nodulizing, centrifugal casting, annealing, shaping and coating are carried out, and then the finished cast iron pipe is obtained. The preparing method is suitable for preparing the high-quality metal mold centrifugal nodular cast iron pipe of DN80-1000 mm. The preparing process comprises a series of operation procedures such as molten iron preparing, molten iron nodulizing, centrifugal casting, annealing, shaping and coating, the preparing technology is simple, the prepared cast iron pipe has the advantages of being high in appearance quality, fine in material structure, high in production efficiency, long in service life and the like, and compared with an existing steel pipe and an existing gray iron pipe, the water-cooling metal mold centrifugal nodular cast iron pipe has better corrosion-resisting performance and tensile performance.

Disclosed herein are methods of processing 7xxx aluminum alloys using a rapid pre-aging step, along with alloys prepared according to the methods. The aluminum alloy products described herein have high strength when subjected to a rapid pre-aging step, as described above, and subsequent thermal treatment, such as paint baking or coating. The alloys prepared and processed according to the methods described herein can be used, for example, in automotive, transportation, electronics, and industrial applications.

The invention discloses pressure resistance and pressure relief bricks for a coal mine underground seal wall and a construction method of the seal wall. The pressure resistance and pressure relief bricks are formed by ceramsite and bounding agent; the bounding agent is formed by multi-iso-cyanogens phenol resin and polyester polyol; a weight ratio of the iso-cyanogens phenol resin and the polyester polyol is 1: 0.8 to 1: 1.2; and a weight ratio of the ceramsite and the bounding agent is 1: 1 to 1: 1.5. The construction method of the seal wall comprises adding a sand and rock bedding layer to a catching groove of the bottom face of a tunnel which is under the seal wall and performing construction above the sand and rock bedding layer with one or two layers of pressure resistance and pressure relief bricks; constructing a main wall body of the seal wall with red bricks; and constructing the connecting positions of the lateral side and the top face of the tunnel and the seal wall with one or two layers of pressure resistance and pressure relief bricks. When pressure is performed on the tunnel, the pressure resistance and pressure relief bricks well absorb the pressure due to the capability of contracting and deforming to be a half; accordingly the service life of the seal wall is prolonged; maintaining times of the seal wall are reduced; and the pressure resistance and pressure relief bricks can be reused to reduce the construction cost and maintenance cost of the seal wall.

The invention relates to a hot rolled steel plate with the honed yield strength of 400 MPa for counterenamel. The hot rolled steel plate is prepared from, by mass percent, 0.08% to 0.15% of C, not larger than 0.10% of Si, 1.0% to 2.0% of Mn, 0.060% to 0.10% of P, not larger than 0.006% of S, not larger than 0.008% of N, 0.02% to 0.08% of Ti, 0.010% to 0.045% of Als, 0.020% to 0.055% of V, 0.01% to0.05% of Nb, 0.15% to 0.30% of Mo and the balance Fe and inevitable impurities. When the thickness of the hot rolled steel plate is larger than or equal to 8 mm, 0.0005% to 0.005% of B is added. Thehoned yield strength of the hot rolled steel plate is larger than or equal to 400 MPa. The hot rolled steel plate has good scute burst resisting performance, meanwhile, the honed yield strength can reach 400 MPa or above, and the requirement of a large enamel assembling structure can be met better.

The invention provides a heat treatment method for spray forming of a 7055 aluminium alloy. The heat treatment method includes the following steps of two-stage solid solution, retrogression low temperature reageing treatment, underaging pretreatment, regression treatment and low temperature reageing treatment. The two-stage solid solution comprises first-stage solid solution and second-stage solidsolution. Underaging is used as pretreatment before regression treatment, the number of eta phases in an alloy matrix is controlled, only a small amount of the eta phases are generated in the matrix,and thus it is guaranteed that the material has certain yield strength, subsequent regression treatment redissolves most of the GP regions in the matrix into the matrix, and the organization is prepared for a large number of dispersed GP regions precipitated by low temperature reaging. Meanwhile, regression treatment also avoids the aging process needing to take a long time to strengthen the phases in a single GP region to achieve the high strength and toughness of the 7055 aluminum alloy.

The invention provides a soft magnetic Co-based bulk amorphous alloy with high saturation induction density. The component formula of the alloy is CoaFebNicBdSiePfCg, a, b, c, d, e, f and g representatomic percent content of components respectively and meet following conditions: a is larger than 35 and smaller than or equal to 65, b is larger than or equal to 10 and smaller than or equal to 35, clarger than or equal to 0 and smaller than or equal to 5, the sum of b and c is larger than or equal to 10 and smaller than or equal to 35, d is larger than or equal to 5 and smaller than or equal to20, e is larger than or equal to 5 and smaller than or equal to 10, f is larger than or equal to 0 and smaller than or equal to 5, g is larger than or equal to 0 and smaller than or equal to 5, the sum of f and g is larger than or equal to 3, the sum of d, e, f and g is larger than or equal to 20 and smaller than or equal to 30, and the sum of a, b, c, d, e and f is equal to 100. The technical problems that the alloy cannot realize high amorphous forming ability and saturation magnetic induction (Bs) and cost are high due to the fact that existing Co-based bulk amorphous alloy contains pre-transition elements or rare earth element are solved.

The invention relates to a corrosion resistant copper alloy material for sensor chips. The corrosion resistant copper alloy material mainly comprises copper, and further comprises 0.5-1.0 wt.% of zirconium, 0.1-0.2 wt.% of yttrium, 3-5 wt.% of platinum, 0.1-0.3 wt.% of chromium, 0.15-0.25 wt.% of cobalt, 0.3-0.5 wt.% of boron, 0.4-0.9 wt.% of manganese, 0.8-1.0 wt.% of silicon, 0.06-0.12 wt.% of iron and 0.4%-0.7% of magnesium. The material provided by invention has excellent sea water corrosion and flushing resistance, high wear resistance and high strength, and is applicable to highly corrosive environments; and the material has yield strength reaching 260-280MPa, tensile strength more than 520MPa, and the elongation of 68-75%, and good comprehensive properties.

Provided is a steel material that has a yield strength of 965MPa to 1069MPa (140ksi grade), and has superior SSC resistance. This steel material has a chemical composition that includes, by mass%, more than 0.50% and less than or equal to 0.80% C, 0.05% to 1.00% Si, 0.05% to 1.00% Mn, less than or equal to 0.025% P, less than or equal to 0.0100% S, 0.005% to 0.100% Al, 0.20% to 1.50% Cr, 0.25% to1.50% Mo, 0.002% to 0.050% Ti, 0.0001% to 0.0050% B, 0.002% to 0.010% N, and less than or equal to 0.0100% O, the remainder consisting of Fe and unavoidable impurities. The steel material includes 0.010mass% to 0.060mass% solid solution C. Furthermore, the yield strength is 965MPa to 1069MPa, and the yield ratio is greater than or equal to 90%.

An expandable valved conduit for pediatric right ventricular outflow tract (RVOT) reconstruction is disclosed. The valved conduit may provide long-term patency and resistance to thrombosis and stenosis. The valved conduit may enlarge radially and/or longitudinally to accommodate the growing anatomy of the patient. Further, a method is disclosed for the manufacture of the valved conduit based in part on a plastically deformable biocompatible polymer and a computer-optimized valve design developed for such an expandable valved conduit.

Disclosed are high-strength aluminum alloys and methods of making and processing such alloys. More particularly, disclosed are aluminum alloys exhibiting improved mechanical strength. The processing method includes homogenizing, hot rolling, solutionizing, and multiple-step quenching. In some cases, the processing steps can further include annealing and/or cold rolling.