163results about How to "Reduce the probability of wire breakage" patented technology

The invention relates to a novel steel wire rod and a manufacturing technique thereof. A prestressed steel bar used as the distributed steel of tubular piles is a new product developed in recent years, and the raw material thereof, namely, the steel wire rod, has no special steel and production technique; the controls for the components and performances, etc. of the steel wire rod are different, which results in larger fluctuation thus bringing the producers and the users more difficulties; therefore, the novel steel wire rod and the manufacturing technique thereof are invented. The components of the novel steel by weight percentage are: 0.28-0.34 percent of C, 0.70-1.10 percent of Si, 1.10-1.50 percent of Mn, less than or equal to 0.025 percent of S, less than or equal to 0.025 percent of P, less than or equal to 0.25 percent of Ni, less than or equal to 0.25 percent of Cr and less than or equal to 0.20 percent of Cu; the adopted technique is converter - ladle furnace (LF) refining - continuous casting - highline mill; in the converter process, high lance height is adjusted, returned slag by the converter is added in the front period, and the alkalinity is controlled in the middle and late period; stirring is done under soft blowing before the end of the process, and then deoxidation by adopting SiAlBa is carried out; in the ladle furnace (LF) refining process, reductive white slag is adopted, the CaSi wires are fed and before finishing the refining, and soft argon blowing is done; in the continuous casting process, the degree of superheat and the casting speed of the molten steel are controlled and casting is preformed under whole course protection; in the rolling process, the delayed cooling technique is adopted. The novel steel wire rod, when in use, the control range of the components is narrow, therefore, the fluctuation of adjacent batches is small; the performance of the novel steel wire rod is stable, and the aberration thereof is small.

The invention discloses an immersion-type hollow fibrous membrane component and complete equipment thereof and belongs to the technical field of manufacturing a membrane component through water treatment. The immersion-type hollow fibrous membrane component consists of membrane silk bundles, membrane end sockets and a central supporting tube; the membrane silk bundles have at least four bundles and are distributed on the periphery of the central supporting tube; two ends of the membrane silk bundles are provided with one membrane end socket respectively, wherein one membrane end socket is a gas inlet end socket; and the other one is a water producing end socket. A plurality of membrane components can be combined into a small unit and a large unit till membrane stacks on the equipment so as to improve service life of the membrane silk and the membrane component; and the structural design of the membrane component concentrates the advantages that the prior strip curtain-type membrane component is uneasy to pollute and the prior columnar membrane component has large membrane filtering area into a whole and has the advantages of large membrane filtering area, convenient mounting of the membrane component, convenient maintenance and the like.

A controlling method for scales on surface of low-carbon cold heading steel hot-rolled wire rods belongs to the field of steel rolling. The method includes steps of precision rolling temperature control, spinning temperature control, and phase-change forepart cooling speed control for an air cooling line. The technical parameters of control includes: controlling the temperature of an entrance of a precision rolling mill in a range of from 900 DEG C to 950 DEG C; controlling the temperature rise in the precision rolling process in a range of from 80 DEG C to 100 DEG C; controlling the spinning temperature in a range of from 880 DEG C to 920 DEG C; adjusting a heat preservation hood of the air cooling line and blower level and controlling the cooling speed of the phase-change forepart of the spun rods in a range of from 2 DEG C per second to 5 DEG C per second; controlling the hood entry temperature in a range of from 760 DEG C to 700 DEG C; and advancing the phase-change area and controlling the time when the wire rods stay in a high-temperature oxidation section in a range of from 60 seconds to 100 seconds. By the method, the thickness of the scales on the surface of the hot-rolled wire rods is controlled evidently in the production of low-carbon cold heading steel SWRCH22A wire rods, mechanical dephosphorization capability is enhanced remarkably while falling during transportation is avoided, and broken rate in spinning and wastage of dies during drawing are reduced.

The invention discloses a wire rod for steel cord and its Al2O3 inclusion control method. The wire rod for steel cord comprises 0.68-0.89wt% of C, 0.1-1.0wt% of Si, 0.35-0.80wt% of Mn, 0.015wt% or less of P, 0.010wt% or less of S, 0.004wt% or less of N, 0.002% or less of total oxygen, 0.0010wt% or less of total aluminum, and the balance Fe and inevitable impurities. The Al2O3 inclusion control method comprises the following steps: allowing the content of Si-Fe and Mn-Fe-Al used after converting to be not greater than 0.02% and the content of Al in a carburant to be not greater than 0.05%; allowing the content of Al2O3 in a refractory material at the pot liner, the pot bottom and the slag line of a large pot to be not greater than 0.05% in the refining process and the content of Al2O3 in lime, silica sand, sillimanite and wollastonite slagging materials to be not greater than 0.05%; allowing the large pot used in the molten steel refining to be special; completing the final deoxidation and component micro-adjustment of the wire rod for steel cord within 15min before the ending of an LF furnace refining; carrying out argon stirring treatment of the molten steel, wherein the argon flow is 150-350NL/min; and allowing the content of Al2O3 in a tundish covering agent to be not greater than 0.03% and the content of Al2O3 in a tundish coating to be not greater than 0.04% in the continuous casting process. The Al content in the wire rod for steel cord is not greater than 0.001% in the invention, so the Al2O3 inclusion in the wire rod is eliminated, and the fracture rate of the wire rod in the drawing process is reduced.

A forced cooling technology after rolling of the coiled steed rod used for making twisted steel cable features that the roller speed is increased in the temp raising segment of phase changing, the roller speed is lower in the other segments of phase changing, an auxiliary blower is additionally used at the phase changing position, and a small cover plate is used to regulate the transverse distribution of wind for uniform cooling. The resultant coiled steel rod has uniform structure, and high tensional strength (1160-1220 MPa).

The invention relates to a stainless steel wire and a production process thereof. The stainless steel wire rope is characterized that stainless steel of specific components is used as wire rope production material and the wire rope production material is subjected to surface treatment, drawing, normalizing heat treatment, zincing, drawing, and stranding to obtain a finished wire rope. The stainless steel wire rope and the production process thereof have the advantages that production steps are few, energy consumption, die consumption and wire breakage rate are low, labor productivity is high, and the wire rope is well resistant to corrosion.

The invention discloses a production method of steel for 82 B steel stranded wires, belonging to the field of metallurgy. In the production method, the steel for the 82 B steel stranded wires is produced by adopting the process flow comprising the following steps of: rotating furnace primary smelting, LF (Low Frequency) refining, RH (Relative Humidity) refining and continuous casting and pouring of a large square billet, wherein the tail end of a solidification end is dynamically and lightly downwards pressed in the procedure of the continuous casting and pouring of the large square billet. According to the production method disclosed by the invention, technologies, i.e. rotating furnace whole-course bottom argon blowing, argon blowing after tapping, RH vacuum degassing, impurity removal,crystallizer electromagnetic stirring, and the like, are adopted in the process flow, and therefore the clean production of the steel for the 82 B steel stranded wires is realized; an antegrade production organization is achieved; obtained components and the quality of casting blanks all meet the requirements for steel grades, and the total oxygen content (T[O]) in the steel is less than 0.0020 percent; and wire breakage does not appear in the wire drawing process of a product, and therefore the wire broken rate of the wire drawing process is reduced.

This invention relates to a method for prodn. of square billets of low carbon and high boron content steel by billet caster. The prodn. procedure comprises: removing-sulfure from molten pig iron and slag-removing; converter steel smelting by top-bottom blowing; blocking slag and tapping steel; oxygen-removing and alloying in steel-ladle; modifying slag in steel-ladle; fine-smelting in steel-ladle by blowing argon; feeding-in AL, Ca-Si line, boron line, soft blowing argon, full protection casting in billet caster; after the activity of oxygen reaches the controlled target Ca-Si line is fed to modifying impurities, then boron line is fed (boron absorbing rate being 40-50% being considered), Mn/S ratio being not less than 13. Advantages are: no problem of blocking runner, low hardening elements, so, no serious bubbles formation problem.

The present invention relates to a high quality 82B high carbon hard wire rod production method, which is characterized in that a large square billet continuous casting billet with a cross section of 280 mm*380 mm is adopted, and a double steel rolling process is performed to produce. The process route comprises: smelting through a converter, ladle refining through a LF furnace, vacuum degassing through a VD furnace, large square billet continuous casting (280 mm*380 mm), track beam breakdown (152 mm*152 mm), and high speed wire rod rolling. The production method has the following advantages that: the large square billet continuous casting billet with the cross section of 280 mm*380 mm is adopted to roll, and process parameter control is combined so as to reduce a carbon segregation index of the casting billet, reduce a wire breaking rate of the wire rod, and improve steel material quality.

The invention discloses a reciprocating progressive self-adaptive feed control method for an electrical spark machine tool. A tool electrode in the electrical spark machine tool is controlled to perform a reciprocating progressive feed motion with a workpiece in an integral manner of reciprocating motion and progressive motion or in a separated manner of reciprocating motion and progressive motion so as to realize high-efficiency and high-quality electrical spark machining of a difficult-to machine material, particularly a semiconductor material, with a metal material. An appropriate discharge gap is automatically formed between the workpiece and the tool electrode, so that normal electrical spark discharge is promoted, continuous machining is ensured, and the method has the beneficial effects of quick chip removal and cooling, preventing the electrode from burning, improving the quality of machining surface, improving the machining efficiency, being wide in application range and the like.

The invention relates to a technology of preparing special-shaped cutting steel wire, comprising the following steps: (1) coarse wire drawing, during which step the steel wire rod of Phi5.5-6.5mm is drawn into the steel wire of Phi2.80-3.25mm, (2) middle filament heat treatment, (3) intermediate drawing, during which step the steel wire of Phi2.80-3.25mm is drawn into the steel wire of Phi 0.76-1.15mm, (4) wet drawing, during which step the steel wire of Phi0.76-1.15mm is drawn into the steel wire of Phi0.08-0.3mm, (5) press rolling, during which step the steel wire is rolled into the steel wire having a cross section of polygon or ellipse, (6) electroplate/bonding, during which step SiC or diamond particle abrasive is fixed upon the external surface of the steel wire in an electroplating or glue-bonding manner, and (7) taking up, during which step the finished product is obtained. The preparing technology of the invention is simple, environment-friendly, efficient, and of low cost. The cutting steel wire prepared via this technology takes the shape of elliptic cylinder or polygon body, with hardness and tensile strength substantially improved, effectively decreasing the wire-broken rate, accelerating cutting speed of steel wire, and improving the cutting efficiency.

The invention relates to a process for manufacturing viscose-based graphite felt. The process comprises the following steps of: selecting wood pulp plant viscose-based fibers as a raw material; needling into a felt body by a domestic novel needle machine; and performing preoxidation treatment, special carbonizing treatment and special graphitizing treatment. The viscose-based graphite felt has the characteristics of extremely high tensile strength, high toughness and porosity, low thread break rate, thread yield of between 30 and 33 percent, high purity, stable performance, superior electrical property and the like. The treatment temperature of the viscose-based graphite felt reaches 2,200 DEG C.

The invention discloses a production process of a stainless steel wire rope. The process is characterized in that stainless steel is adopted as a steel wire rope production raw material, and the chemical components of stainless steel include, by mass, 0.012-0.025 % of C, 0.06-0.075% of Si, smaller than 0.03% of P, 0.20-0.30% of W, 15.0-19.0% of Cr, 20.0-23.0% of Ni, 1-1.5% of Mo, 2.50-5.00% of Mn,smaller than 0.03% of S, smaller than 0.1% of Cu, smaller than 0.01% of N, smaller than 0.02% of Ti and the balance Fe and inevitable impurities. The process specifically includes the following stepsof firstly, surface treatment; secondly, drawing; thirdly, normalizing heat treatment and galvanizing; fourthly, drawing; fifthly, stranding to form the rope. The process is reasonable in formula, simple in production process, low in energy consumption, low in fracture rate, high in production efficiency, excellent in comprehensive after-performance, especially large in tensile strength, good incorrosion resistance and worthy of popularization.

The invention discloses an ultra-low carbon steel fine wire drawing method, which comprises a first stage of drawing process, a recrystallization annealing process, and a second stage of drawing process. According to the first stage of drawing process, the total deformation is calculated to be 75 percent to 85 percent according to a wire rod axial circle area. The method is applicable to the processing field of products such as copper-clad steel wires and electronic leading wires. The cold plastic deformation is hardly carried out during a second-time rapid processing and hardening process, so that the occurrence of the phenomenon that the tensile strength of middle wires is too high can be effectively avoided, the wire breaking rate can be remarkably reduced, the middle wires are prevented from being processed and hardened excessively, and the die loss is reduced; the finished products i.e. fine wires obtained according to the method provided by the invention can meet the requirement of low tensile strength. The ultra-low carbon steel fine wire drawing method provided by the invention has no special requirement on drawing equipment, is applicable to a common connecting tank drawing machine, and has no need to increase equipment and reformation investment; the diameter of each winding drum can be equal or unequal; and the ultra-low carbon steel fine wire drawing method provided by the invention is applicable to ultra-low carbon steel with the carbon content being not more than 0.05 weight percent, and the raw material steel types are wider.

Provided are a hemodialyzer and a hematodialysis device. The hemodialyzer comprises an outer shell, a fiber bundle formed by a hollow fiber pipe, an end cover, packaging glue, an annular flow guiding distribution ring, a dialyzate inlet, a dialyzate outlet, a blood inlet and a blood outlet. The annular flow guiding distribution ring is placed at the positions right opposite to the dialyzate inlet and/or the dialyzate outlet, one end of the annular flow guiding distribution ring is connected to the tail end of the outer shell, and the other end of the annular flow guiding distribution ring inclines in the longitudinal direction of the outer shell toward the dialyzate inlet or the dialyzate outlet right opposite to the annular flow guiding distribution ring. The hollow fiber pipe is made of a polyether sulfone hollow fiber film, and the spinning dope of the polyether sulfone hollow fiber film comprises, by weight, 250 parts-650 parts of modified polyether sulfone blends, 20 parts-400 parts of hydrophilia molecular compounds, 1 part-90 parts of nano-modification hydroxide radical titanium dioxide blends and 20 parts-120 parts of alcohols solvents. The hemodialyzer improves the contact area and the removal rate of dialyzate and the surface of the fiber pipe, and the high removal rate and the high ultrafiltration coefficient are achieved.

The invention relates to rolling method used to solve continuous casting small square billet porous shrinkage cavity. It includes the following steps: heating, high pressure water de-scaling, rolling and cold controlling. Its features are that in heating, hot section temperature is increased to 1250+/-20 degree centigrade and remained for 65+/-5 minutes; before rolling, the pressure in high pressure water de-scaling is controlled at 70-150MPa; rolling temperature is controlled at 1020-1060 degree centigrade. This method can make the porous shrinkage cavity of the small square billet center seam.

The invention relates to a preparation method of a 5356 aluminum alloy ingot. The method uses an electromagnetic effect for heating and for preserving the temperature of an alloy melt, so that the temperature control is convenient; at the same time of heating, as alternating current supplied in an induction coil can form variable magnetic current, and the variable magnetic current can form induction current in an annular pipe communicated with a crucible, the melt circularly flows by surrounding the annular pipe to achieve a stirring effect, and the component and structure uniformity of the aluminum alloy ingot is effectively improved; under the stirring effect generated by the induction coil, the vacuum purification treatment is supplemented to effectively improve the dispersion speed of hydrogen atoms in the melt, so that the high-speed degassing is facilitated, the degassing effect is enhanced, and the hydrogen content in the 5356 aluminum alloy ingot is reduced; and through detections, the hydrogen content of the 5356 aluminum alloy ingot prepared by the method is lower than 0.15 mL/100 gAl.

The invention discloses a thermal treatment double-station uninterrupted unwinding device. The thermal treatment double-station uninterrupted unwinding device comprises a station bracket, coil bobbins and an unwound wire bracket, wherein two unwinding shafts are respectively horizontally arranged at the upper end of the station bracket. Steel wire heads and tails on the two coil bobbins are welded well by a welding machine. When the unwinding of the first reel of wires is about to end, an operator treads on a pedal type positioning pin, the coil bobbins horizontally rotate for 180 degrees, and conversion can be finished. Then, the welding work of the next reel is prepared. The whole process is more convenient and flexible, the continuous conduction of procedures is not affected, consumed labor is less, and the work efficiency is improved. Moreover, unwinding tension is constant, the tension of a tension band does not need to be frequently regulated, the wire breakage rate is reduced, and the stretching of steel wires in the hot galvanizing treatment process is reduced.

Disclosed is a novel process for producing a low carbon gas shielded welding wire. The novel process for producing the low carbon gas shielded welding wire includes following steps of (1) raw material selection, (2) surface treatment processes, (3) drawing process and (4) copper plating process, wherein the step (1) includes that as for steel wire rod composition, C is equal to 0.06-0.010%, Si is equal to 0.80-1.00%, Mn is equal to 1.40-1.60%, P or S is smaller than or equal to 0.020%, and Ca is smaller than or equal to 0.0015%; the step (2) includes an acid pickling process and a phosphating process, as for the acid pickling process, pickling solution proportion includes that prewash hydrochloric acid concentration is 5-10%, hydrochloric acid concentration for substrate washing is 15-20% and FeC12 is smaller than or equal to 300g/l, acid pickling time is 10-25minutes, washing is performed by high pressure water instantly after acid pickling, and as for the phosphating process, phosphating solution proportion includes that Ta total acidity is 50-110pt and Fa free acidity is 5-20pt, phosphating temperature is 70-80DEG C and phosphating time is 1-3 minutes. By means of the novel process for producing the low carbon gas shielded welding wire, a chemical adsorption film is formed on the surface of a steel wire rod, a thin phosphating film is formed on the surface of the steel wire rod by mid-temperature phosphating process and short phosphating time, adsorption of surface lubricating agents is more uniform and compact, the steel wire rod is directly drawn to form a finished product wire in an unannealed state after surface treatment, costs are reduced by 50-80 yuan/ton compared with those of common processes, the wire breaking rate is decreased by 70%, and the producing efficiency is increased by 40%.

The invention discloses a quenching medium for a steel cord. The quenching medium comprises the following components in percentage by mass: 2-5% of sodium carboxymethyl cellulose, 15-20% of sodium polyacrylate, 3-5% of additives and water in balancing amount. The invention further discloses a quenching method for the steel cord. The quenching method comprises the following steps: placing the steel cord, which naturally cools in air to 800 DEG C, in the quenching medium provided by the invention; and taking the steel cord out of the quenching medium at 450-550 DEG C by adjusting the size of a quenching region and a core feeding speed. After being taken out of the quenching medium, the steel cord is subjected to sorbite structural transformation in air by virtue of waste heat. The quenching medium provided by the invention is free of pollution, is environment-friendly, can replace high-pollution lead bath to perform sorbite structural transformation heat treatment of the steel cord, and also has favorable stability and cooling uniformity above 500 DEG C; and the quenching technology provided by the invention not only improves the operation environment on a production field, but also effectively reduces the energy consumption and is low in cost.