3187 results about "Plasticity" patented technology

The invention relates to Ti microalloyed ultra-fine grained cold rolling dual-phase steel of a 1,000MPa level and a preparation method thereof, belonging to the technical field of cold rolling ultra-high strength steel for automobiles. The steel comprises the following chemical compositions in percentage by weight: 0.03-0.20 percent of C, 0.20-0.80 percent of Si, 1.2-2.0 percent of Mn, 0.03-0.15 percent of Ti, less than 0.15 percent of S, less than 0.020 percent of P, 0.02-0.15 percent of Als and the balance of Fe. In the invention, C-Si-Mn-Ti is used as a basic alloy system, low-price Ti is adopted, and alloy elements such as Cr, Mo, Nb, V, and the like are not added, thereby reducing the production cost; through a flexible continuous annealing process, the size of a martensite island can be controlled to be 1-2 micrometers or increased to about 5 micrometers under the condition that the quick cooling speed is lower than 50 DEG C/s in continuous annealing so as to obtain the following three different types of dual-phase steel: a high strength type (Rm is 980-1,200MPa, and A50 is 10-13 percent), a high plasticity type (Rm is 980-1,100MPa, and A50 is 14-18 percent) and a synthesizing type (Rm is 980-1,150MPa, and A50 is 12-15 percent); and the yield ratio is 0.47-0.65.

The invention discloses microalloyed steel used for an axle of a railway freight car, wherein the microalloyed steel contains the following chemical components by weight: 0.50-0.57 percent of C, 0.17-0.40 percent of Si, 0.60-1.00 percent of Mn, 0.20-0.35 percent of Cr, 0.18-0.40 percent of Ni, 0.08-0.18 percent of Mo, 0.02-0.06 percent of Al, 0.020-0.060 percent of Ti, 0.030-0.10 percent of V, less than or equal to 0.010 percent of S, less than or equal to 0.020 percent of P, less than or equal to 0.005 percent of B, less than or equal to 0. 20 percent of Cu, less than or equal to 0.010 percent of Sb, less than or equal to 0.03 percent of Sn, less than or equal to 0.04 percent of As, less than or equal to 0.0015 percent of [O] and less than or equal to 0.0060 percent of [N], and the rest is Fe. The invention has high strength, good plasticity, good low-temperature impact property and good crack-resistance sensitivity.

The invention discloses high strength Al-Mg-Sc alloy powder, and a preparation method, application and 3D printing method thereof. The specific combination of the alloy powder has multiple strengthening mechanisms of nanometer precipitation strengthening, fine grain strengthening, solid solution strengthening and the like, and high strength and plasticity are achieved. The rare earth high strengthAl-Mg-Sc alloy powder is subjected to 3D printing, parts are free of cracks, the compactness degree is high, the tensile strength and the elongation percentage are far higher than those of AL-12Si and AlSi10Mg alloys for traditional 3D printing, and the problems that a traditional aluminum alloy is low in 3D printing strength and poor in elongation percentage, and the stretching performance and the elongation percentage cannot be improved at the same time are solved. The tensile strength of the parts formed by printing the high strength Al-Mg-Sc alloy powder can reach 523 MPa or above, and the elongation percentage can exceed 13%.

The invention provides a hot-rolled high-strength steel sheet for static enameling and a manufacturing method for the steel sheet. The main components by weight of the steel sheet are: C: 0.02-0.1%, Si<=0.1%, Mn: 0.2-1.5%, P: <=0.035%, S<=0.035%, Al: 0.01-0.1%, N: 0.001-0.01%, Ti: 0.01-0.1 %, Nb: 0.001-0.1%, and the remainder are iron and unavoidable foreign matters. The structure of the steel sheet comprises ferrite and pearlite, an the average particle diameter of the ferrite is not more than 11 micrometer. The manufacturing method of the steel sheet is, rolling twice the continuously cast or steel blanks after heating to 1100-1250 DEG C with total pressure-down amount <=50%, and final rolling temperature >=800 DEG C, then cooling section by section to coiling temperature 550-700 DEG C, and finally leveling the sheet. The hot-rolled high-strength steel sheet is applicable for pressure vessels such as bladders of water heaters, liquid-storing tanks and water buckets, etc. that are manufactured by static enameling process, is of high strength and good plasticity, high resistance to scaling bursting and air tightness.

The invention relates to steel for ocean engineering and a manufacturing method thereof, in particular to a steel plate with a thickness of 80mm and a low compression ratio for ocean engineering and a manufacturing method thereof. The steel plate comprises the chemical components with the weight percentages as follows: 0.12 to 0.16 percent of C, 0.20 to 0.40 percent of Si, 1.20 to 1.60 percent ofMn, smaller than or equal to 0.010 percent of P, smaller than or equal to 0.003 percent of S, 0.025 to 0.050 percent of Nb, 0.030 to 0.050 percent of V, 0.010 to 0.020 percent of Ti, smaller than or equal to 0.20 percent of Cr, 0.10 to 0.40 percent of Ni, smaller than or equal to 0.20 percent of Cu, smaller than or equal to 0.08 percent of Mo, 0.0250 to 0.050 percent of Al, smaller than or equal to 20ppm of O, smaller than or equal to 40ppm of N, smaller than or equal to 3ppm of H, and the remaining amount of Fe and inevitable impurities. A controlled rolling and cooling technology is adopted, the heating temperature before rolling is 1180 DEG C to 1250 DEG C, the rough rolling temperature is 1000 to 1100 DEG C, and the finish rolling starting temperature is 850 to 880 DEG C; laminar cooling is conducted after the rolling, the final cooling temperature is 640 to 680 DEG C, and the cooling rate is 5 to 15 DEG C/s; and normalizing treatment is conducted, the normalizing temperature is 890 to 910 DEG C, the heating rate is 1.4min/mm, and the heat preservation time is 50 to 90min. The obtained steel has the characteristics of high strength, good Z-direction lamellar tearing resistant performance, high plasticity, and the like.

The invention provides a heat treatment method for high-strength and toughness hot-formed steel plates for automobiles, which belongs to the technical field of high-strength steels for automobiles, and aims to solve the problems of high strength but poor plasticity of steel plates for hot-formation at present. Technical measures to solve the problem: the mass percentage of the components is: C: 0.2~0.4%, Si: 0.1-0.5%, Mn: 1.0~2.0%, Cr: 0.1~0.5%, B: 0.001-0.005%, Ti : 0.01~0.05%, Al: 0.01-0.1%, P: <0.02%, S: <0.01%, N: <0.01%, and the balance is iron and unavoidable impurities. In the range of ~500℃, tempering treatment is carried out for 1-5min. The invention has the advantages that after the tempering treatment, the plasticity of the hot-formed steel is significantly improved while the strength is slightly reduced, and the toughness of the steel plate after hot stamping is improved.

A high intensity deformed steel bar and a manufacturing procedure thereof are disclosed, belonging to the field of steel metallurgy and suitable for the deformed steel bar with 12mm to 40mm production standard. The high intensity deformed steel bar of the invention comprises the ingredients: C: 0.12-0.25%; Si; 0.12-0.80%; Mn: 0.30-1.55%, P: 0.01-0.035%, S: 0.01-0.040%, equivalent weight of carbon: 0.19-0.51% the rests are Fe. The procedure flow of the invention comprises the steps of: squaring billet, heating, roughly and intermediately rolling, precisely rolling, performing QTB water penetration, placing on a cooling bed (cooling naturally), scaling, checking and putting into storage. The invention has the advantage that: chemical ingredients are designed diversely according to the diverse production standards of the deformed steel bar, the after-rolling remaining heat treatment procedure is used to keep the steel bar in a good plasticity and toughness.

The invention relates to a method for preparing a magnesium alloy section through continuous angle rotation shearing, extrusion and shaping and a mould. The method comprises the following steps: (1) a magnesium alloy blank material is subjected to homogenization treatment; (2) a mould of an extrusion mould with a plurality of angle rotation and molding is preheated; and the inside of a mould passage is evenly coated with lube; (3) an extrusion cylinder is heated to a temperature of between 175 and 325 DEG C; and (4) the homogenized blank material is heated to a temperature of between 200 and 350 DEG C; the extrusion ratio of the extrusion mould is between 4 and 100; and the magnesium alloy blank material is subjected to unidirectional extrusion at an extrusion speed of between 3 and 6 m/min so that the magnesium alloy blank material is subjected to compression and extrusion with high extrusion ratio and equal passage extrusion with a plurality of angle rotation. The magnesium alloy material prepared through the method has an ultrafine crystal grain structure, has the advantages of substantially improving the plasticity, low temperature superplasticity and high strain speed of the magnesium alloy material and has high yield stress.

A 60-steel hot rolling coil rod with high strength and high plasticity and production method thereof belong to the hot rolling coil rod and production method thereof. The coil rod consists of the following chemical substances by weight percentage (%): 0.57-0.65 % of C, 0.17-0.37 % of Si, 0.50-0.80 % of Mn, 0.16-0.25 % of Cr, <= 0.35 % of P, <= 0.035 % of S, <= 0.30 % of Ni, <= 0.25 % of Cu, and the balance of Fe. The hot rolling coil rod with Phi 6.5 mm has a tensile strength of 990-1060 Mpa, a reduction of area of 50-60 % and a Sorbit rate of 85-90 %. The coil rod and the production method thereof have advantages that the process equipment and parameter setting are reasonable, the long-standing problem is solved, the product quality is improved, the deep processing of the coil rod is easy, a thinner steel wire product is easily drawn, the load that the steel strand processed with the steel wire can bear is substantially increased, the reduction of area of the steel wire is improved, the intermediate thermal treatment process is omitted and the energy is saved.

The invention discloses a base-containing high-entropy alloy composite and a preparation method thereof, and relates to a high-entropy alloy and a preparation method. The base-containing high-entropyalloy composite and the preparation method aim at solving the problems that the mechanical strength and the plasticity of an existing high-entropy alloy can not be improved, and the fragility is high.The base-containing high-entropy alloy composite is formed by preparing the following components of, by mass percentage, 1-20% of reinforced phase and 80-99% of base-containing high-entropy alloy matrix. The preparation method comprises the following steps that one, a raw base-containing high-entropy alloy composite is weighed; and two, the raw base-containing high-entropy alloy composite weighedin the Step one is smelted by an electric arc smelting method or an induction smelting method, and a base-containing high-entropy alloy is obtained. The yield strength of the prepared base-containinghigh-entropy alloy composite is 1200-2100 Mpa, the breaking strength is 2300-4000 MPa, and the limiting strain epsilon p (%) is 20-50%. The base-containing high-entropy alloy composite can be obtained.

The invention discloses a steel with high plasticity, high toughness and high strength and a manufacturing method thereof. The chemical compositions of the steel are as follows in terms of weigh percentage: 0.15 to 0.30 of C, 0.20 to 1.40 of Mn, 0.10 to 0.50 of Si, less than or equal to 0.015 of P, less than or equal to 0.012 of S, less than or equal to 0.20 of Ni, 0.40 to 1.50 of Cr, 0.25 to 1.35 of Mo, 0 to 0.10 of V, less than or equal to 0.2 of Cu, 0.01 to 0.05 of Al, 0.0005 to 0.0020 of B, less than or equal to 0.010 of (O+N) and the balance of Fe and impurities. The manufacturing method comprises the following steps: smelting according to the formula, continuous casting into a blank, hot rolling into plates or tubes, quenching at the temperature of 875 to 930 DEG C and holding the temperature for 25 to 40 minutes, tempering at the temperature of 625 to 675 DEG C for 30 to 90 minutes, then air cooling, and quenching and tempering heat treatment. The steel has yield strength of more than or equal to 1000MPa, tensile strength of more than or equal to 1100MPa, zero-degree-centigrade charpy impact work of more than or equal to 100J, specific elongation of 20 to 30 percent and is applicable to manufacture important structures of engineering machinery, high buildings and oil well pipes, and the like.

The invention relates to a lanthanon Y which is utilized to strengthen magnesium alloy effectively and a preparation technology thereof, in particular to a quasicrystal phase which is utilized to strengthen Mg-Zn-Y-Zr magnesium alloy and a preparation method thereof, and the problems such as magnesium alloy strengthening, etc. are solved. On the premise of definite Y contents, the volume percentage of the quasicrystal phase which is led into a magnesium alloy matrix to reach the maximum through reasonably choosing the rate between Zn and Y in the alloy (the rate between Zn and Y ranges from 6 to 15), so as to prepare the Mg-Zn-Y-Zr magnesium alloy with low density, high strength and better plasticity. The magnesium alloy material has the components and the contents thereof as follows: the content of zinc (Zn) ranges from 5 to 30 percent; the content of yttrium (Y) ranges from 0.5 to 5 percent; the content of zirconium (Zr) ranges from 0.3 to 0.8 percent, and the others are magnesium (Mg); all the percentage are weight percentage. The magnesium alloy material are processed through alloy melting and subsequent hot extrusion processing and deformed into products, and the operation of the processing technology is simple and convenient. The tensile strength of the material satisfies that Sigma (b) ranges from 290 to 360MPa, the yield stress delta0.2 ranges from 175 to 260MPa, the unit extension Delta ranges from 10 to 18 percent, and the density is 1.84 to 2.73g/cm<3>.

The invention relates to high-boron low-carbon wearproof cast steel and a heat treatment method thereof, which belongs to the steel material technical field. The cast steel comprises the following chemical compositions in percentage by weight (wt percent): 0.15 to 0.30 percent of C, 1.5 to 2.5 percent of B, 2.6 to 3.0 percent of Si, 1.4 to 1.8 percent of Cr, 0.5 to 0.8 percent of Mn, 0.05 to 0.12 percent of Ce, 0.03 to 0.15 percent of V, 0.03 to 0.15 percent of Ti, less than 0.05 percent of P, less than 0.05 percent of S, the balance being Fe, the content of v and Ti is more than 0.01 and less than 0.25. In the invention, a casting is kept between 880 DEG C and 920 DEG C for 1h to 3h, treated by isothermal quench in an isothermal salt bath furnace with the temperature between 250 DEG C and 300 DEG C, is kept for 2h to 4h and later cooled in the air to room temperature, thereby obtaining the high-boron low-carbon wearproof cast steel. Compared with the prior art, the cast steel and the technology of the invention have the advantages of good plasticity and toughness, high wear resistance , low cost, etc.

The invention discloses a titanium alloy with high strength, high plasticity and good fracture toughness and a preparing technology of the titanium alloy and belongs to the technical field of the material science. The titanium alloy includes, by weight percent, 2.5%-6.0% of Al, 6.5%-8.5% of Mo, 0%-3.0% of V, 1.5%-4.5% of Cr, 0.7%-2.0% of Fe, 0%-2.5% of Zr, 0.05%-0.2% of O and the balance Ti and inevitable impurities. The titanium alloy with the component feature is subjected to proper deformation and heat treatment, and therefore the titanium alloy with the tensile strength being 1450 MPa or above, the ductility being not smaller than 5% and the fracture toughness being not smaller than the value (please see the value in the specification) can be obtained, good toughness performance is achieved, and the titanium alloy is suitable for being applied to structural parts which work under the room temperature and have the requirements for high strength and good fracture toughness.

The invention relates to the technical field of metal material deformation heat treatment processes and discloses a process method for improving the comprehensive mechanical property of a 2219 aluminum alloy ring piece so that coarse residual crystalline phases of the large-size 2219 aluminum alloy ring piece can be fully crushed and crystalline grains can be refined and equiaxed, thus, the strength and the plasticity of the 2219 aluminum alloy ring piece are improved at the same time, and the anisotropy is decreased. The process method comprises the steps of multi-directional forging, punching, mandrel supporter broaching, piecewise rolling and heat treatment. In the multi-directional forging step, the heating temperature of a blank is 500 DEG C-520 DEG C, and the final forging temperature is higher than or equal to 380 DEG C. Piecewise rolling comprises the steps that in the first stage, the ring blank is heated to 420 DEG C-460 DEG C and subjected to hot rolling on a ring rolling machine, and the hot rolling deformation quantity is 30%-40%; and in the second stage, the ring piece subjected to hot rolling is air-cooled to 240 DEG C-280 DEG C and is continuously subjected to medium and low temperature rolling on the ring rolling machine, and the deformation quantity is 15%-25%.

The invention provides a martensite precipitation hardening stainless steel for structural member and a manufacturing method thereof. The martensite precipitation hardening stainless steel comprises the following chemical components in percentage by weight: less than or equal to 0.05 percent of C, 13.50 to 15.50 percent of Cr, 2.5 to 4.0 percent of Cu, 3.0 to 5.0 percent of Ni, 0.15 to 0.40 percent of Nb and Ta, 0.010 to 0.040 percent of N, 0.050 to 0.15 percent of V, less than or equal to 0.80 percent of Si, less than or equal to 1.00 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.010 percent of S, and the balance of Fe and inevitable impurities. The stainless steel is smelted by combining an electric furnace, AOD refining and vacuum self-consuming technology, so the stainless steel has the characteristics of high strength, good plasticity, good corrosion resistance and the like, and can meet the requirements of high-strength components such as high-pressure values, oil drill, efficient heavy-duty machinery and the like on material performance.

The invention discloses a 100-150mm alloy structural steel 4140 thick plate and a production technique thereof. The 100-150mm alloy structural steel 4140 thick plate comprises the following chemical components in percentage by mass: 0.39-0.42% of C, 0.20-0.30% of Si, 0.85-0.95% of Mn, at most 0.010% of P, at most 0.003% of S, 0.020-0.040% of Als, 0.9-1.0% of Cr, 0.17-0.23% of Mo, and the balance of Fe and residual elements. KR molten iron pretreatment, converter smelting, argon blowing, LF (ladle furnace) refining, VD (vacuum degasser) refining, die casting, steel ingot slow cooling, steel ingot conditioning, heating, controlled rolling, cooling in pile, heat treatment and slow cooling are utilized to strictly control the contents of P, S and other harmful elements capable of influencing the plasticity and toughness of the steel plate, thereby ensuring the minimized internal residual stress of the 4140-grade 100-150mm-thick steel plate; and the internal quality is acceptable, and various performance indexes satisfy the standard requirements. The reasonable quenching and tempering technique is utilized to ensure that various properties of the 4140 steel plate satisfy the requirements.

The invention discloses a high-strength high-plasticity cold-rolled steel plate for automobiles and a production method thereof. The high-strength high-plasticity cold-rolled steel plate comprises, by weight, 0.25-0.35% of C, 0.8-1.2% of Si, 2.0-2.5% of Mn, less than or equal to 0.02% of P, less than or equal to 0.005% of S, 0.5-1.0% of Al, 0.001-0.002% of B and the balance Fe and unavoidable impurities. The production method comprises smelting, continuous casting, hot rolling, pickling, cold rolling and continuous annealing. A continuous annealing heating temperature is in a range of 800-850 DEG C, thermal insulation time is in a range of 150-180s, a cooling rate is greater than or equal to 50 DEG C/s, a quenching temperature is in a range of 250-280 DEG C, a partition temperature is in a range of 350-400 DEG C, partition time is in a range of 300-600s and after partition, the product is cooled to a room temperature at a cooling rate greater than or equal to 50 DEG C/s.

An HT 960 steel plate with excellent plasticity and toughness and a manufacture method thereof. The HT 960 steel plate comprises, by weight, 0.07%-0.12% of C, Si no mare than 0.15%, 0.80% -1.20% of Mn, P no mare than 0.012%, S no more than 0.0030%, 0.30%-0.60% of Cr, 0.30%-0.60% of Mo, 1.00%-1.60% of Ni, 0.15%-0.45% of Cu, 0.0008%-0.0016% of B, 0.006%-0.014% of Ti, 0.010%-0.030% of Nb, 0.025%-0.060% of Als, 0.030%-0.060% of V, N no more than 0.0060%, O no more than 0.0040%, 0.001%-0.004% of Ca, residual Fe and unavoidable inclusions. A TMCP + tempering thermal treatment process is employed to obtain super high strong steel plate with tensile strength no less than 960 MPa, yield strength no less than 900 MPa, Charpy transverse impact work (separate value) no less than 47J at -60 DEG C, fracture elongation percentage delta 5 no less than 15%, uniform elongation percentage Ag no less than 6% and excellent weldability.

An Al material clad Mg-base band is prepared from the Mg plate or Mg plate ingot as basic material and the cladding Al sheets through hot rolling or cold rolling to attach said Al sheets to both surfaces of basic material. It has high cold deformation power and anticorrosion ability.

The invention refers to a kind of in situ modified waste rubber powder compound material and the manufacturing method. The method puts the waste rubber powder pulverized by normal machine without surface preprocessing into each kind of rubber or thermal plasticity plastics by normal rubber plastic process and device, through specific conjugate ternary interpenetration polymer network and the interface conjugate interpenetration technique, the rubber powder and the rubber or the plastic are modified in situ and combined tightly, thus forms the sulfide rubber or thermal plasticity elastic material. The process is simple, the cost is low, and the product has a good performance, it can be applied to produce each kind of sulfide product or thermal plasticity elastic product.

The invention discloses a magnesium lithium alloy, which comprises the following ingredients by content: 8-12wt% of Li, 6-8wt% of Al, 1-3wt% of Zn, 0.01-0.2wt% of Ca, 0.01-0.2wt% of Mn, 1-2wt% of Sc and the balance of Mg; wherein the impurity element Cu is less than 0.01wt%, Fe is less than 0.005wt% and Ni is less than 0.005wt%. On the basis of addition of Al and Zn, Ca, Mn and Sc-containing RE are added, the Al is a main intensify element of the alloy, Zn is the intensify element of the alloy, the plasticity of the alloy is simultaneously changed, the non continuous deposition of a strengthening phase Mg17Al12 can be inhibited, thereby slipping of a crystal boundary is inhibited, and the alloy strength is enhanced.

The invention provides a steel used for a CT80 coiled tubing, the chemical compositions of which by weight percentage are as follows: 0.04 percent to 0.25 percent of C, 0.10 percent to 0.60 percent of Si, 0.50 percent to 2.0 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.050 percent of S, 0.30 percent to 1.50 percent of Cr, 0.02 percent to 0.13 percent of Nb, 0.01 percent to 0.10 percent of Ti, 0.01 percent to 0.10 percent of V, less than or equal to 0.30 percent of Mo, less than or equal to 0.30 percent of Cu, less than or equal to 0.30 percent of Ni and 0.01 percent to 0.05 percent of Al, and the rest are Fe and other unavoidable impurities. The invention also provides a manufacturing method and the application of the steel. The steel used for the CT80 coiled tubing of the invention has yield strength up to 80Kpsi (kilopond per square inch) and better plasticity. The manufacturing method of the invention is simple and easy to be implemented.

The invention discloses a steel plate for a hardening and tempering type low temperature pressure vessel with ultralimit thickness, low crack sensitivity and high strength and a method for producing the steel plate. The steel plate comprises the following chemical constituents according to percent by weight: 0.065-0.085% of C, 0.15-0.25% of Si, 1.30-1.50% of Mn, 0.40-0.45% of Ni, 0.15-0.25% of Cr, 0.20-0.25% of Mo, 0.035-0.045% of V, 0.030-0.045% of of Nb, 0.025-0.03% of Ti, 0.020-0.05% of Alt, 0.015% of P, 0.005% of S and the balance of Fe; and the method for preparing the steel plate comprises the steps that molten steel is smelted according to set constituents, the molten steel is cast into a casting blank, two stages of rolling, i.e. rough rolling and fine rolling are carried out after the heating, after quick cooling, a hardening and tempering technology is carried out for thermal treatment, matching of excellent strength, plasticity, cold bending and shock resistance can be achieved, and the requirement of the steel for the low temperature pressure vessel is satisfied.