33results about How to "Good oil storage performance" patented technology

The invention discloses a high-strength antifriction double-layered iron base powder metallurgy material and a preparation method thereof. The preparation method comprises the following steps that a densification enhancer is mixed in a matrix, so that a matrix material is dense and high in strength; a compound pore-forming agent is mixed in a surface layer to enable a surface layer material to be porous and oil-bearing, and besides, the requirements on the hardness and the wear resistance of the surface layer are met, and the contact interface and the lubricating condition of a friction pair are kept stable, so that the novel high-strength antifriction double-layered iron base powder metallurgy material is prepared. The bearing property, the wear resistance and the antifriction anti-seizing property of the iron base powder metallurgy material are improved remarkably, and high strength and a high lubricating property are effectively combined.

The invention relates to a cold-rolled high-hardness seamless steel pipe manufacturing method. The manufacturing method includes the steps of heating a pipe billet in a circular furnace; punching the heated pipe billet by a puncher; annealing the pipe billet; spraying borax to descale; placing the annealed pipe billet in a pipe mill for hot rolling; performing pipe separation by separating a hot-rolled pipe from a mandrel; performing stress relief annealing, namely, heating the hot-rolled pipe in the heating furnace to obtain the annealed pipe billet; performing acid washing treatment to remove rust scale on the surface; phosphating to enable the surface to form a zinc phosphate chemical film; performing saponification treatment to form a metallic soap lubricating film and the like; performing cold rolling on the obtained pipe billet to be subjected to cold rolling to obtain a cold-rolled pipe; performing heat treatment to reduce residual stress; performing pre-straightening treatment to reduce residual stress; performing induction furnace quenching treatment; tempering in a box-type furnace; honing; performing hot straightening to obtain a high-precision steel pipe. The steel pipe obtained by the method is high in hardness and precise in size.

The invention discloses a fuel-saving Cr-O-N nanocrystalline composite ceramic coated piston ring of a diesel engine and a preparation method of the fuel-saving Cr-O-N nanocrystalline composite ceramic coated piston ring of the diesel engine. The nanocrystalline composite ceramic coated piston ring which is composed of Cr, CrN and a Cr-O-N nanometer crystal layer in sequence is generated by means of the technology of arc ion plating. The fuel-saving type Cr-O-N nanocrystalline composite ceramic coated piston ring of the diesel engine and the preparation method of the fuel-saving Cr-O-N nanocrystalline composite ceramic coated piston ring are reasonable in structural design and achieve gradual change of components and the hardness gradient. In addition, the prepared Cr-O-N nanocrystalline composite ceramic coating layer and the piston ring have the advantages that good binding force, good wear-resistant property and corrosion-resistent property are provided, higher oil storage capability and hardness are provided, the defects that existing piston rings are poor in wear-resistant property and insufficient in oil storage capacity are overcome, long-term stable work of the piston ring is ensured, and the using performance of the piston ring is enabled to be greatly improved. Moreover, the fuel-saving type Cr-O-N nanocrystalline composite ceramic coated piston ring of the diesel engine has the advantages of being stable in quality in the process of coating, high in processing efficiency, and capable of reducing production cost of factories and having good industrial application prospect.

The invention relates to a production method of a cold-drawn high-precision seamless steel tube. The production method includes heating a tube blank in a circular furnace; punching a heat tube by the aid of a puncher; subjecting the tube blank to annealing; spraying the tube blank with sodium borate to remove oxide skin; leading the annealed tube blank into a tube mill for hot milling; tensioning the milled tube after tandem milling by a tensioning machine for sizing; performing stress relieving, to be specific, heating the milled tube in a heating furnace to obtain an annealed tube blank; performing acid dipping on the tube blank to remove scale of the surface; subjecting the tube blank to parkerizing, and accordingly a chemical coating of zinc phosphate is generated on the surface of the tube blank; performing saponification to form lubricating coatings such as metallic soap; subjecting the tube blank to be cold drawn to cold drawing, and the cold-drawn tube is achieved; heating the cold-drawn tube to decrease residual stress; pre-straightening the cold-drawn tube to further decrease the residual stress; quenching the cold-drawn tube in an induction furnace; tempering the cold-drawn tube in a box-type furnace; honing the cold-drawn tube; subjecting the cold-drawn tube to heat straightening. In this way, the high-precision steel tube is obtained and high in yield strength and precise in size.

The invention discloses a piebald cylinder sleeve for centrifugal casting production and a production technology of the piebald cylinder sleeve. The piebald cylinder sleeve comprises, by weight percent, 3.5-3.9% of C, 2.6-3.0% of Si, smaller than 0.02% of P, 0.7-0.9% of Cu, 0.2-0.4% of Ni, 0.04-0.08% of Bi, 0.1-0.3% of Nb, 0.03-0.06% of Mg, 0.02-0.04% of Ce and the balance Fe. According to the high-performance spheroidal graphite cast iron cylinder sleeve, the amount of spheroidal graphite (the field diameter is 70 mm) is not smaller than 200, and the matrix structure is granular pearlite. Compared with the prior art, after finish grinding and polishing processes are sequentially conducted on inner holes of the cylinder sleeve obtained through the formula and the production technology, piebald-similar surface graphite and a WS2 alloy layer are formed on the surface layer, thus, honing of net stripes is not needed for the inner holes of the cylinder sleeve, oil storage performance, the lubricating property and the abrasion reducing performance are better, and the defects that a gray cast iron cylinder sleeve is poor in oil storage performance, long in run-in period with a piston, low in strength and poor in plasticity are overcome.

The invention relates to a hot-rolled high-strength oil pipe manufacturing method, which comprises the following steps: heating: heating a pipe blank in an annular furnace; punching: punching holes in the heated pipe blank through a puncher; annealing: annealing the pipe blank; spraying borax; removing oxide skin; hot-rolling: feeding the annealed pipe into a pipe mill for hot-rolling; separating the pipe: separating the rolled pipe from a core rod; removing stress and annealing: feeding the rolled pipe into the heating furnace for heating, so as to obtain the annealed pipe blank; pickling: removing rust scale on the surface; phosphating: forming a zinc phosphate chemically-generated covering membrane on the surface; saponifying: forming metal soap and lubrication covering membranes: cold-drawing: cold-drawing the pipe blank to be cold-drawn, so as to obtain a cold-drawn pipe; performing heat treatment: reducing residual stress; honing; and performing hot straightening treatment, so as to obtain a cold-drawn precise inner-hole honed pipe, wherein a numerically-controlled honing machine is adopted in honing. The cold-drawn precise inner hole-honed pipe obtained through the method is good in comprehensive performance, good in low-temperature impact toughness, precise in dimension, smooth in surface, and excellent oil storage property.

The invention relates to a manufacturing method for a high-precision cold-drawn inner-hole honed pipe. The manufacturing method includes the following steps of heating, i.e., heating a tube blank in a circular furnace; perforation, i.e., perforating the hot tube blank through a perforating machine; annealing, i.e., annealing the tube blank; cold rolling, i.e., leading the annealed tube blank into a tube rolling mill for cold rolling to obtain a rolled tube; stress relief annealing, i.e., leading the rolled tube into a heating furnace for heating to obtain an annealed tube blank; acid pickling, i.e., carrying out acid pickling on the annealed tube blank to remove rust scale on the surface; phosphating, i.e., forming a chemically-generated zinc phosphate covering film on the surface of the tube blank; saponification, i.e., forming metallic soap and the like on the covering film to lubricate the covering film; cold drawing, i.e., carrying out cold drawing on the tube blank to be cold-drawn to obtain a cold-drawn tube; heat treatment, i.e., reducing residual stress of the cold-drawn tube through the quenching-tempering heat treatment process; honing, i.e., carrying out honing with a numerically controlled honing machine; and hot straightening treatment, i.e., carrying out hot straightening treatment to obtain a high-precision cold-drawn steel tube. The precision inner-hole honed tube which is high in yield strength, precise in dimension and smooth in surface is obtained by means of the method.

The invention discloses an electrode slice slitting device. The slitting device comprises a frame, a first slitting mechanism, a second slitting mechanism, a connecting mechanism and an oil coating mechanism; multiple first cutters of the first slitting mechanism are arranged on a first cutter frame at intervals; first clamping sleeves are arranged between every two adjacent first cutters; secondcutters of the second slitting mechanism are arranged on a second cutter frame at intervals; second clamping sleeves are arranged between every two adjacent second cutters; the connecting mechanism isused for fixedly connecting the first slitting mechanism with the second slitting mechanism, so that edges of the first cutters are bonded with edges of the second cutters; a felt of the oil coatingmechanism is connected with a switch through an oil pipe; the switch is used for controlling an oil content on the felt; and the felt can lubricate and clean the first cutters and the second cutters.The slitting device is stable and reliable in structure, high in slitting precision, excellent in product consistency and long in service life of the cutters.

The invention relates to a manufacturing method of a hot-rolled high-precision petroleum pipe. The manufacturing method comprises the following steps: heating: a pipe blank is heated in an annular furnace; perforation: the heated pipe blank is perforated by a perforator; annealing: the pipe blank is annealed; spraying of boron sand: oxide scales are removed; hot rolling: the annealed pipe blank is led into a pipe rolling machine for hot rolling; sizing: the rolled pipe formed by continuous rolling is sized by a sizing machine; stress relief annealing: the rolled pipe is led into a heating furnace for heating so that the annealed pipe blank is obtained; acid washing: rust scales on the surface are removed; parkerizing: a chemical coating film of zinc phosphate is formed on the surface; saponification: such lubricating coating films as a metallic soap are formed; cold rolling: the pipe blank to be cold rolled is cold rolled to obtain a cold-rolled pipe; heat treatment: residual stress is reduced; pre-straightening: the residual stress is reduced; quenching in an induction furnace; tempering in a chamber furnace; honing; hot straightening; and obtaining of the high-precision steel pipe. The method is used for manufacturing the high-precision steel pipe with high yield strength and size precision.

The invention relates to an application technology of a novel release agent in the centrifugal casting of a cylinder liner. The release agent has the following material tissue components in percentage by weight: 70-80% of 200-mesh artificial graphite powder, 3-5% of 200-mesh aluminide, 1-3% of 220-mesh ferrosilicon powder, 4-8% of 200-mesh quartz powder and 2-4% of 75 Si powder.

The invention relates to a production method of a cold-drawn precise-inner hole honed tube. The production method includes heating a tube blank in a circular furnace; punching a heat tube by the aid of a puncher; subjecting the tube blank to annealing; spraying the tube blank with sodium borate to remove oxide skin; leading the annealed tube blank into a tube mill for hot milling; separating the milled tube and a mandrel; performing stress relieving, to be specific, leading the milled tube into a heating furnace to obtain an annealed tube blank; performing acid dipping on the tube blank to remove scale of the surface; subjecting the tube blank to parkerizing, and accordingly a chemical coating of zinc phosphate is generated on the surface of the tube blank; performing saponification to form lubricating coatings such as metallic soap; subjecting the tube blank to be cold drawn to cold drawing, and the cold-drawn tube is achieved; performing heating on the cold-drawn tube to decrease residual stress; adopting a CNC honing machine to hone the cold-drawn tube; subjecting the cold-drawn tube to heat straightening, and the cold-drawn precise-inner hole honed tube is achieved. The cold-drawn precise-inner hole honed tube made in the way is good in comprehensive performance and low-temperature impact toughness, has precise size and smooth surface and is good in oil storage effect.

The invention discloses an asymmetric groove type sand storage wear-resistant oil well pump plunger, belongs to the field of oil field oil production equipment. Annular grooves coaxial with a plungerbody are formed in the surface of the plunger body, and the annular grooves are arranged at equal intervals along the axial direction of the plunger body; and an axial inclination included angle between the upper wall surface of each annular groove and the plunger body is alpha, the axial inclination included angle between the lower wall surface of each annular groove and the plunger body is beta,wherein the alpha is larger than the beta. According to the plunger, the outer surface of the plunger body is arranged to be of an asymmetric groove structure, so that the oil storage capacity and the sand storage capacity of a plunger-pump cylinder ring space is improved, the resistance to reciprocating motion of the plunger in a pump cylinder is reduced, the working period of a plunger-pump cylinder is prolonged, the single well productivity is increased, and the single-well oil production cost is continuously reduced.