93results about How to "Simple rolling process" patented technology

The invention discloses a thick chromium-molybdenum steel plate for hydrogenation equipment, and also discloses a production method of a steel plate. The steel plate comprises the following components by weight percent: 0.12%-0.15% of C, 0.02%-0.07% of Si, 0.50%-0.60% of Mn, less than or equal to 0.007% of P, less than or equal to 0.005% of S, 2.35%-2.50% of Cr, 0.95%-1.10% of Mo, 0.012%-0.02% ofNb, less than or equal to 0.20% of Cu, less than or equal to 0.20% of Ni, less than or equal to 0.003% of Sb, less than or equal to 0.005% of Sn, less than or equal to 0.016% of As, less than or equal to 0.003% of O, less than or equal to 0.008% of N and less or equal to 0.0002% of H, the balance of Fe and inevitable impurities. For the steel plate, an electroslag remelting technology is adopted,electroslag ingot with the maximum piece weight being 50t is melted, and the maximum thickness of the produced thick chromium-molybdenum steel plate for the hydrogenation equipment can achieve 198mm,and the maximum piece weight of the single-piece finished steel plate can achieve 37.2t by a heating-rolling technology and thermal-processing production equipment of normalizing plus accelerated cooling plus tempering.

The invention discloses a high-strength and high-plasticity medium manganese cold-roll steel sheet and a manufacturing method thereof, and belongs to the technical field of metal material manufacturing. The high-strength and high-plasticity medium manganese cold-roll steel sheet comprises the following main components in percentage by mass: 0.15-0.25% of C, 7-8% of Mn, 1.2-1.8% of Si, and less than or equal to 0.05% of Al. The components are smelted and cast into a blank, and then the casting blank is subjected to multi-pass hot rolling so as to obtain a hot-rolled plate; the hot-rolled plate is subjected to intermediate heat treatment two times and two stages of cold rolling; the temperature of the intermediate heat treatment is 80-120 DEG C larger than Ar1, and the heat preservation time is 8 hours and above; in the two stages of cold rolling, the deformation is 30-50%; and the temperature of final heat treatment of the cold-roll steel sheet is Ar1+70 DEG C and above, and the annealing time ranges from 10 minutes to 2 hours. The cold-roll steel sheet disclosed by the invention is simple in preparation method, low in cost, and wide in application prospect. A prepared high-strength and high-plasticity medium manganese cold-roll steel sheet has excellent mechanical properties, and the product of strength and elongation of the cold-roll steel sheet can be up to 44.9 GPa*%.

The invention provides a large-thickness hydrogenating 14Cr1MoR steel plate and a production method thereof. The large-thickness hydrogenating 14Cr1MoR steel plate is composed of following elements: 0.10%-0.17% of C, less than or equal to 0.55% of Si, 0.40%-0.65% of Mn, less than or equal to 0.008% of P, less than or equal to 0.03% of S, less than or equal to 0.20% of Ni, 1.20%-1.50% of Cr, less than or equal to 0.10% of Cu, 0.45%-0.65% of Mo, 0.025%-0.050% of Al, less than or equal to 0.016% of As, less than or equal to 0.005% of Sn, less than or equal to 0.003% of Sb, less than or equal to 0.003% of O, less than or equal to 0.008% of N, less than or equal to 0.0002% of H and the balance of Fe and unavoidable impurities. The production method comprises the following steps: smelting; pouring; heating; rolling; carrying out water cooling; slowly cooling; carrying out heat treatment. The steel plate adopts a two-phase control rolling process, namely an II type control rolling process, so that the problems that the rolling pressure of a rolling machine is not enough, crystal grains are rough and not uniform and the impact toughness is reduced are solved; the rolling process of the steel plate is simple and easy, is easy to operate and is suitable for production of common steel factories with normalizing furnaces, outer machine furnaces and car bottom furnaces.

The invention discloses a 400 MPa level fine grain threaded reinforcing bar and a manufacturing method thereof, and belongs to the field of threaded reinforcing bar production. The reinforcing bar comprises, by mass percentage, 0.20-0.25% of C, 0.3-0.8% of Si, 1.2-1.6% of Mn, 0.01-0.04% of P, 0.01-0.04% of S, 0.004-0.02% of Ti, 0.001-0.08% of Cr, 0.0001-0.008% of V, 0.0001-0.008% of Nb, 0.0001-0.008% of Al, 0.003-0.01% of O, 0.003-0.01% of N and the balanced of Fe and unavoidable impurities; manganese silicate inclusion, titanium oxide manganese sulfide complex inclusion, manganese sulfide complex inclusion and other unavoidable inclusions are included. The method comprises the steps of molten steel smelting, inclusion controlling, continuous casting, continuous casting blank heating and rolling cooling. The method has the advantages that optimizing designing is conducted on components and the inclusions, smelting and rolling are combined, a reinforcing mechanism of using the inclusions to induce fine crystalline to improve the strength of the reinforcing bar, the addition of precious alloy elements is reduced, and therefore the low-cost high-quality production of the threaded reinforcing bars is achieved.

The invention relates to hydrogen induced cracking (HIC)-resistant heat resistant steel in an iron element system and a preparation process thereof. The steel comprises the following components in percentage by weight: 0.1 to 0.15 percent of C, 0.2 to 0.5 percent of Si, 0.3 to 0.6 percent of Mn, 2.0 to 2.5 percent of Cr, 0.9 to 1.1 percent of Mo, less than or equal to 0.003 percent of S, less than or equal to 0.010 percent of P and the balance of iron and impurities. The preparation process comprises a heating process, a hot rolling process and a heat treatment process sequentially, wherein the heat treatment process comprises a normalizing process and a tempering process. The steel has a high comprehensive mechanical property, a high low-temperature impact property, high HIC resistance and relatively low tempering tendering sensitivity; and the preparation process is simple, easy to operate, low in cost, high in yield and wide in thickness specification ranges, and a small number of alloys with a few varieties are added.

The invention relates to a low yield ratio chromium-molybdenum steel plate and a production method thereof, belonging to the technical field of steel smelting. The production method comprises the following processes of smelting continuous casting, heating and rolling, and thermal treating. The steel plate comprises the following components by weight percent: more than or equal to 0.13% and less than or equal to 0.17% of C, more than or equal to 0.30% and less than or equal to 0.40% of Si, more than or equal to 0.50% and less than or equal to 0.70% of Mn, less than or equal to 0.007% of P, less than or equal to 0.005% of S, more than or equal to 1.00% and less than or equal to 1.10% of Cr, more than or equal to 0.50% and less than or equal to 0.65% of Mo, less than or equal to 0.20% of Cu, more than or equal to 0.10% and less than or equal to 0.20% of Ni, less than or equal to 0.003% of Sb, less than or equal to 0.010% of Sn, less than or equal to 0.010% of As, the balance of Fe and inevitable impurities. The low yield ratio chromium-molybdenum steel plate meets the requirement of domestic and aboard petrifaction and coalification industries on lowing the yield ratio of the chromium-molybdenum steel plate used at high temperature environment, can be widely used on devices such as delay coking devices of coke drums and hydrogenation reactor and the like, has good cold bending property, does not crack when being manufactured, and has good rebound elasticity and good plate shape.

The invention belongs to the technical field of magnesium-lithium alloy materials, and particularly relates to a magnesium-lithium alloy foil and a preparation method and application thereof. A magnesium-lithium alloy cast ingot is coiled into an alloy coiled tape with the thickness of 1.5-3.5 mm through large-deformation hot extrusion cogging, then, multi-pass coiling type cooling rolling is conducted through a four-roller aluminum foil rolling mill provided with a tension roller set and a coiling machine, and thus the magnesium-lithium alloy foil is obtained, wherein the minimum thickness ofthe magnesium-lithium alloy foil can be rolled to 0.014 mm. The foil is short in preparation process, high in efficiency, small in residual stress, fine in grain, smooth, free of burrs and high in yield, and the yield can reach 80% or above. The magnesium-lithium alloy foil is used for preparing a vibrating diaphragm or a vibrating diaphragm dome base material, and has good shock absorption performance and high fidelity.

The invention discloses a large-thickness 14Cr1MoR steel plate and a production method thereof. The large-thickness 14Cr1MoR steel plate comprises the following chemical components in percentage by mass: 0.12-0.14% of C, 0.5-0.6% of Si, 0.40-0.50% of Mn, 0.006-0.007% of P, equal to or less than 0.005% of S, 1.3-1.5% of Cr, 0.58-0.60% of Mo, 0.10-0.20% of Ni, equal to or less than 0.05% of Nb, equal to or less than 0.20% of Cu, equal to or less than 0.003% of Sb, equal to or less than 0.010% of Sn, equal to or less than 0.010% of As and the balance of Fe and unavoidable impurities. The production method comprises the procedures of smelting, continuous casting, heating, rolling and thermal treatment. According to the production method, the two-stage rolling control technology and the thermaltreatment technology of normalizing and tempering are adopted to solve the problems that the crystal particles are thick, non-uniform, lower in impact toughness and higher in hardness, and the head performance and the tail performance of the steel plate differ widely.

The invention discloses a preparation method of a micro order niobium foil. According to the method, three rolling process reversible type rolling is performed on a niobium belt by utilizing a Sendzimir twenty-roller cold rolling machine, the obtained niobium foil is cleaned, and subjected to edge splitting and heat treatment after each rolling process reversible type rolling, and finally, the micro order niobium foil is obtained. According to the method, three rolling process rolling is performed on the niobium belt with the width being 100 mm to 120 mm and the thickness being 0.15 mm to 0.2mm by adopting the Sendzimir twenty-roller cold rolling machine. Due to the beneficial effects that the Sendzimir twenty-roller cold rolling machine is large in rolling force and high in rolling precision, by designing a reasonable rolling process, the thickness precision of the micro order niobium foil is greatly guaranteed; meanwhile, through a reasonable annealing process, the structure internal stress of the niobium foil is eliminated in time, influences on the niobium foil in the rolling process are reduced, and finally, the micro order niobium foil with the thickness being 0.007 mm to 0.009 mm is obtained.

The invention relates to a 500MPa-grade niobium-containing screw-thread reinforcing steel bar and a manufacturing method thereof, and belongs to the field of screw-thread reinforcing steel bar production. The reinforcing steel bar comprises 0.20 to 0.25 percent of C, 0.5 to 0.8 percent of Si, 1.2 to 1.6 percent of Mn, 0.01 to 0.04 percent of P, 0.01 to 0.04 percent of S, 0.005 to 0.02 percent of Ti, 0.001 to 0.01 percent of RE, 0.015 to 0.035 percent of Nb, 0.003 to 0.01 percent of O, 0.003 to 0.01 percent of N, and the balance Fe and inevitable impurities. In the reinforcing steel bar, the quantity of Nb-compound-containing precipitates with the equivalent diameter being 0.003 to 0.03mum is 50 to 500pcs/mum<2>; and the total quantity of RE-compound-containing and/or Tti-compound-containing occluded foreign substances with the equivalent diameter being 0.03 to 3mum is 2000 to 4000pcs/mm<2>. The preparation method of the 500MPa-grade niobium-containing screw-thread reinforcing steel barcomprises the steps of smelting, controlling the occluded foreign substances, continuously casting, heating a continuous casting blank, and rolling the reinforcing steel bar. The method can realize the low-cost high-quality production of the 500MPa-grade screw-thread reinforcing steel bars.

The invention discloses an acid corrosion resistance martensite wear-resisting steel plate. The steel plate is prepared from, by mass, 0.14-0.22 wt% of C, 0.30-0.60 wt% of Si, 0.30-1.00 wt% of Mn, 0.010-0.020 wt% of Ti, 0.02-0.04 wt% of Nb, 0.50-1.0 wt% of Ni, 0.20-0.50 wt% of Cu, 0.9-1.3 wt% of Cr, 0.08-0.12 wt% of Sb, 0.0010-0.0020 wt% of B, 0-0.003 wt% of S and 0-0.012 wt% of P. The acid corrosion resistance martensite wear-resisting steel plate can achieve the purposes of good hardness, plasticity, wear resistance and corrosion resistance of the steel plate.

The invention provides a one-step large-deformation rolling method of a beta solidification TiAl alloy plate. The method comprises the following steps that 1, raw materials are weighed; 2, a TiAl alloy casted ingot is manufactured by utilizing a vacuum induction melting technology, and heat treatment is carried out; 3, two-step hot extrusion deformation is carried out on the alloy; and 4, one-steplarge-deformation packing rolling is carried out on the alloy, and a pack is removed so as to obtain the TiAl alloy plate which is uniform and fine in structure. According to the one-step large-deformation rolling method of the beta solidification TiAl alloy plate, the beta solidification TiAl alloy with excellent high-temperature deformation capability is adopted, the beta phase content is controlled to be 15%-25%, and the excellent high-temperature deformation capability of the TiAl alloy is ensured; meanwhile, the alloy structure of a blank is refined violently through the two-step extrusion so as to remarkably improve the structure uniformity of the alloy, and therefore, one-step large-deformation rolling of the blank can be guaranteed, finally, the TiAl alloy plate with the uniform and fine structure and good room temperature plasticity is obtained, and the problems that in the prior art, a TiAl alloy rolled blank is coarse in structure, plate forming is difficult, and the platestructure uniformity is poor are solved.

The invention discloses a large, thick, high-strength and high-toughness TMCP type steel plate and a production method thereof. The large, thick, high-strength and high-toughness TMCP type steel plate is composed of, by weight, 0.06%-0.08% of C, 0.20%-0.40% of Si, 1.40%-1.50% of Mn, 0.015% or less of P, 0.005% or less of S, 0.020-0.030% of Nb, 0.030%-0.050% of Alt, the balance Fe and inevitable impurities and 0.20% or less of Pcm. According to the steel plate, the components are simple, only a proper amount of microalloy Nb is added, and the precious elements such as V, Ti and Ni are not added; production cost is low, and the probability of large-scale production is increased. The steel plate is of a mixed structure mainly containing bainite, ferrite, pearlite and martensite and has a good comprehensive mechanical property; the steel plate is better in matching of the components and the strength and toughness, and it is guaranteed that the steel plate has the excellent comprehensive mechanical property; particularly, the impact performance of half of the plate in the thickness direction is good at the low temperature of minus 40 DEG C, and the method can be widely used for producing low-temperature-resistant building steel and engineering steel used in extremely cold climate. The method has the advantages that the production cost is low, and the technique is simple; the performance of products is excellent, and the comprehensive mechanical property of the products is stable.

The invention belongs to the technical field of production of hot-continuous-rolled plate strips and particularly relates to X65 pipeline steel and a production method thereof. According to the technical scheme used for solving technical problems, the X65 pipeline steel comprises, by weight, 0.065%-0.10% of C, 0.10%-0.30% of Si, 1.40%-1.60% of Mn, equal to or less than 0.020% of P, equal to or less than 0.010% of S, 0.030-0.039% of Nb, 0.06%-0.08% of V, 0.008%-0.020% of Ti and the balance Fe and inevitable impurities. The X65 pipeline steel and the production method thereof have the characteristics that the cost is relatively low, the rolling technique is simple, and the operability is high. The yield strength of the X65 pipeline steel produced through the method is 480-540 MPa, the tensile strength of the X65 pipeline steel is 600-660 MPa, and the impact energy of the X65 pipeline steel at the temperature of minus 20 DEG C is equal to or larger than 180 J.

The invention relates to a hot continuous rolling steel strip and a manufacturing method thereof, in particular to X60 pipeline steel and a manufacturing method thereof. According to the technical scheme, the X60 pipeline steel is composed of, by weight, 0.05%-0.10% of C, 0.10%-0.30% of Si, 1.20%-1.40% of Mn, 0-0.020% of P, 0-0.010% of S, 0.020%-0.034% of Nb, 0.05%-0.08% of V, 0.008%-0.019% of Ti, and the balance Fe and unavoidable impurities. No expensive elements such as Mo and Ni are needed to be added, so that cost is relatively low; the rolling technique is simple and high in operability. In addition, the manufactured X60 pipeline steel has the characteristics of being stable in mechanical property, good in matching between strength and toughness and excellent in welding property.

The invention discloses a 690MPa-grade quenched and tempered high-strength steel plate and a production method of the 690MPa-grade quenched and tempered high-strength steel plate. According to the chemical components, the 690MPa-grade quenched and tempered high-strength steel plate comprises, by mass percentage, 0.18%-0.22% of C, 0.20%-0.40% of Si, smaller than or equal to 0.025% of P, smaller than or equal to 0.015% of S, 1.7%-2.2% of Mn, 0.0060%-0.0120% of N, 0.090%-0.12% of V, 0.003%-0.005% of B and the balance Fe and inevitable impurity elements. The production method comprises the steps of a smelting working procedure, a heating working procedure, a rolling working procedure, a cooling working procedure, a slow cooling working procedure and a quenching and tempering thermal treatmentworking procedure, wherein a quenching and tempering technology is adopted by the quenching and tempering thermal treatment working procedure. According to the 690MPa-grade quenched and tempered high-strength steel plate and the production method of the 690MPa-grade quenched and tempered high-strength steel plate, the organization type of the steel plate is tempered sorbite and tempered martensite, the yield strength Rp0.2 of the steel plate is larger than or equal to 670MPa, the tensile strength Rm is larger than or equal to 730MPa, A50 is larger than or equal to 20%, the -20 DEG C transverseimpact energy is larger than or equal to 80J, and the surface hardness HB is larger than or equal to 360.

The invention relates to a hot continuous rolling steel belt and a production method thereof, in particular to thick X65 pipeline steel and a production method thereof. The thick X65 pipeline steel is low in cost and can maintain good strength, toughness and drop weight tear performance. According to the technical scheme, the chemical components of the thick X65 pipeline steel comprise, in percentage by weight, 0.07%-0.10% of C, 0.10%-0.30% of Si, 1.40%-1.60% of Mn, 0.020% or less of P, 0.010% or less of S, 0.030%-0.039% of Nb, 0.06%-0.08% of V, 0.008%-0.019% of Ti, 0.15%-0.30% of Cr and the balance Fe and unavoidable impurities. According to the thick X65 pipeline steel and the production method thereof, addition of expensive Mo, Ni and other elements is not needed, the finish rolling inlet temperature of the thick X65 pipeline steel does not need to be lowered substantially, the cost is relatively low, the rolling technology is simple, and operability is high. In addition, the yield strength of the 12mm-17mm thick X65 pipeline steel is 480-518 MPa, the tensile strength of the 12mm-17mm thick X65 pipeline steel is 560-660 MPa, the impact energy at 20 DEG C below zero is 190 J or more, and the drop weight tear area at 20 DEG C below zero is larger than 94%.

The invention discloses a 12Cr2Mo1R steel plate for a seal head and a production method thereof. The steel plate comprises the following chemical components, by mass percentage: 0.11-0.13% of C, 0.06-0.08% of Si, 0.40-0.60% of Mn, 0.007-0.009% of P, less than or equal to 0.004% of S, 2.2-2.5% of Cr, 1.00-1.10% of Mo, 0.10-0.20% of Ni, less than or equal to 0.05% of Nb, less than or equal to 0.20%of Cu, less than or equal to 0.003% of Sb, less than or equal to 0.01% of Sn, and less than or equal to 0.01% of As, with the balance being Fe and unavoidable impurities. The production method includes smelting, continuous casting, heating, rolling, heat treatment, sample processing and heat treatment processes. The 12Cr2Mo1R steel plate for a seal head and the production method thereof solve theproblems that a conventional 12Cr2Mo1R steel plate is prone to surface cracks, high hardness and easy cracking during processing, and ensures the comprehensive performance of the formed steel plate.