13 results about "Alloy steel" patented technology

The invention provides a novel modeling method for casting large-sized and ultra large-sized alloy steel track shoes. The method comprises the following steps of: placing a model on a shaping plate with a gas extracting box; covering a heated plastic film on a model form and the shaping plate; attaching the plastic film to each part of the form and the shaping plate through vacuum suction force; brushing a high temperature resistant costing on the model form attached with the plastic film; placing a sand box mounted with a gas extracting device on a model plate; forming a casting head and a gas outlet in an upper casting sand box; filling dry quartz sand into the sand box; ramming the casting sand by using a vibration table; scraping the sand model; covering an upper sealing sand box of the sand model by using a plastic film; pumping loose sand in the sand box to negative pressure so that the sand model is hardened; pulling out the hardened sand model to obtain the model form; making upper and lower sand models; setting a core; and closing the box for casting. Compared with the traditional sand model, the novel modeling method for casting the large-sized and ultra large-sized alloy steel track shoes, provided by the invention, has the following advantages that: the working environment is largely improved, the size accuracy and surface roughness of the cast are improved, long service life of the mold is obtained, the consumption of the casting sand and auxiliary materials is saved, energy is saved and emission is reduced.

A NiCuSiFe alloy prepared from Ni and Cu contained waste through resmelting contains Ni (25-60 wt%), Cu (25-60), Si (8-15), impurity (less than or equal to 0.2) and Fe (the rest), and can also be used as additive for smelting refractory steel, high-weatherability steel and other alloy steel. Its advantages are low smelting point, high dispersity and deoxidizing effect in molten steel and low cost.

The present invention specifically relates to a pre-tearing film bonding device, including a frame part, a bonding part and a pre-tearing film machine, and the bonding part includes a TP feeding device, a pre-peeling film hanging mechanism, a TP film tearing part, Vision system, LCM film tearing part, pre-lamination part, vacuum lamination part, LCM loading part, finished product unloading part, the pre-tearing film machine includes vacuum platform and pre-peeling film hanging mechanism, the pre-peeling film The wire hanging mechanism is tightened by winding gold steel wires on six cylinders. The pre-peeling film hanging wire mechanism is provided with a pre-peeling film hanging wire cylinder, and a steel wire is arranged on the top of the pre-peeling film hanging wire cylinder. A film-tearing manipulator is arranged on one side of the film hanging cylinder, and the pre-stripping film hanging mechanism promotes the forward movement of the pre-peeling film hanging cylinder through the fixed vacuum value in the vacuum platform to physically cut into the OCA. Improve the success rate of automatic film tearing and reduce the cost of tearing film, while reducing equipment costs and improving production efficiency.

The invention relates to a dual-purpose steel for hot forging, warm extruding and cold stamping tools and dies and belongs to the technical field of alloy steel manufacturing technologies. The dual-purpose steel for the tools and dies comprises the following components in a percent by weight: 0.15-0.35% of C, 0.4-1.4% of Si, 0.5-1.4% of Mn, 2.5-8.5% of Cr, 0.95-4.75% of Mo, 0.8-3.65% of W, 0.5-2.0% of V, 0.2-1.75% of Ni, 0.5-2.5% of Co, 0.1-0.56% of Nb, 0.01-0.3% of Re and the balance Fe. The dual-purpose steel is high in mechanical properties, high in strength, great in tenacity, high in hardness, resistant to wear, durable, long in service life and suitable for hot, warm and cold working conditions.

The invention discloses a 5CrNiMo tempering process. The process includes: 1) determination of the tempering heating temperature of 5CrNiMo at 490DEG C-530DEG C; 2) determination of the tempering time: the tempering heat preservation time of steel with effective thickness of 300mm is 6h, and the heat preservation time of alloy steel can be increased by 1/3, therefore the hammer forging die 5CrNiMo tempering time is 7h; 3) determination of the tempering cooling mode: oil cooling is carried out after furnace discharge to prevent temper brittleness, in order to eliminate the stress generated by oil cooling, retempering can be performed at 160DEG C-180DEG C, and after tempering, the product cannot be cooled to room temperature in oil, otherwise cracking is likely to occur; 4) determination of the tempering hardness: the tempering hardness is within a required range of 32-35HRC; and 5) guarantee of sufficient forging die tempering time to avoid cracking caused by excessive high hardness at the core of the die; and prevention of second class brittleness in cooling after forging die tempering, and at the same time implementation of second tempering with a temperature about 10DEG C lower than the first tempering temperature and a holding time shortened by 20%-25%.

The invention discloses a welding rod matched with steel for 3Ni-1.6 Cr-0.5 Mo nuclear power equipment for use. The welding rod comprises a high-alkalinity welding rod coating and a low-alloy steel core wire for the welding rod, wherein the coating is formed by mixing a solid component and a liquid component; the solid component comprises the following composition elements in percentage by weight:44%-48% of CaCO3, 20%-25% of CaF2, 6%-8% of TiO2, 0-1% of Na2CO3, 4%-6% of CaSiO3, 1%-3% of MgO, 4%-10% of TiFe, 1%-3% of SiFe and 4%-10% of metal powder containing Ni and Cr, wherein the metal powder comprises 3%-6% of Ni and 2%-4% of Cr; the liquid component is potassium sodium water glass which accounts for the 20-23% of the mass of a mineral raw material dry powder component, the component elements of the core wire comprise component elements of, by weight, C: 0.09%-0.12%, Si: 0.1%-0.23%, Mn: 1.5%-2.0%, P: less than or equal to 0.02%, S: less than or equal to 0.02%, Cr: 1.0%-1.8%, Ni: 2.6%-3.5%, Mo: 0.3%-0.7%, Cu: less than or equal to 0.020%, Co: less than or equal to 0.020%, and the balance of Fe. The welding rod is good in welding adaptability, high in deposited metal strength, good in toughness and good in low-temperature plasticity, and the welding requirements of SA508Gr.4N steel and improved steel thereof developed at the present stage are met.

The invention provides a material formula for a diamond bit. The material formula is characterized by comprising the following components in part by mass: 60-80 parts of iron powder, 10-15 parts of manganese powder, 3-5 parts of chromium powder, 3-8 parts of nickel powder, 2-6 parts of vanadium powder, 10-15 parts of tungsten powder, 1-2 parts of zirconium powder, 3-5 parts of niobium, 1-5 parts of lead powder, 3-8 parts of nano graphite powder, 1-5 parts of molybdenum disulfide powder, 3-12 parts of silicon dioxide powder, 1-3 parts of magnesia powder and 2-4 parts of crystal water.Accordingto the invention, the optimized alloy steel formula is adopted to manufacture the diamond bit; the diamond bit is low in production cost and higher in tensile strength, yield strength and hardness; aplurality of alloy elements including nickle, vanadium, tungsten and the like are added in the components and are uniformly distributed in the internal structure of alloy steel; and moreover, the lubricating components including nano graphite powder and molybdenum disulfide powder are added, and nano graphite powder and molybdenum disulfide powder reduce brittleness and prolong the service life ofthe diamond bit.