CN110791710A - Environment-friendly energy-saving austenite cold-heading stainless steel wire and production process thereof - Google Patents
Environment-friendly energy-saving austenite cold-heading stainless steel wire and production process thereof Download PDFInfo
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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Abstract
The invention discloses an environment-friendly energy-saving austenite cold heading stainless steel wire, which comprises the following components in percentage by weight: 0-0.10% of C, 0-0.10% of Si, 9-11% of Mn, 10-12% of Cr, 0.30-1.0% of Mo, 0.030-0.060% of S, 2-5% of Al, 0-0.04% of P, 0-0.40% of Cu, 0-0.010% of Ti, 0.5-4.5% of Ni, 0.05-0.25% of N, and the balance of Fe and inevitable impurities. The invention has the advantages of low yield ratio, high plasticity, good oxidation resistance, good low temperature resistance, good diamagnetism, intergranular corrosion resistance and the like, reduces inclusions to the maximum extent, and avoids cold heading cracking.
Description
Technical Field
The invention relates to an environment-friendly energy-saving austenite cold-heading stainless steel wire and a production process thereof.
Background
The cold heading process is one of the novel processes for machining less and no cutting metal under pressure. The method is a processing method which utilizes the plastic deformation generated by metal under the action of external force and redistributes and transfers the volume of the metal by means of a die so as to form the required part or blank. The cold heading process is most suitable for producing standard fasteners such as bolts, screws, nuts, rivets, pins, and the like. The cold heading deformation is large, and the number of cutting processing parts is large, so that the wire rod is required to have good cold heading performance, and also has good cutting performance, so that the die loss is saved, and the cost is reduced.
The inclusion is one of the main causes of cold heading cracking, and the larger the inclusion particle is, the more easily the inclusion particle is cracked, the size of the inclusion within 2mm from the surface should not be more than 0.15 Lm. It is generally believed that the B-type (alumina) and C-type (spherical oxide) inclusions are the most harmful among the non-metallic inclusions. In the high and low temperature resistant ferrite material for the cold heading bolt, B-class inclusions are not more than 0.5 grade, D-class inclusions are not more than 1 grade, other inclusions are not more than 2 grades, and the total number of inclusions is not more than 3 grades. Patent publication No. CN 106893940A: the sulfur-containing free-cutting cold heading steel wire rod and the production method thereof adopt the working procedures of converter smelting, LF + RH double refining and continuous casting to produce and obtain a section bloom; heating, rolling and cooling the section bloom to obtain the cold heading steel wire rod; the section bloom comprises the following components in percentage by weight: 0.10-0.20% of C, 0.10-0.40% of Si, 0.60-0.90% of Mn, 0.90-1.20% of Cr, 0.10-0.30% of Mo, 0.030-0.060% of S, 0.02-0.06% of Alt, less than or equal to 0.035% of P, less than or equal to 0.40% of Cu, less than or equal to 0.010% of Ti, and the balance of iron and trace impurities. According to the method, harmful elements such as P, Cu and Ti are reduced by reasonably designing solid solution strengthening elements such as C, Si and Mn, and LF + RH double refining and bloom processes are adopted, so that the aims of reducing the hardness of hot-rolled wire rods and improving the plasticity of the wire rods are fulfilled; the method improves the cutting performance of the wire rod by adding the S element, and finally produces the cold heading steel wire rod with good cold heading performance and cutting performance. Patent publication No. CN 110157990A: a high-temperature-resistant high-nickel stainless steel material for cold-heading fasteners and a production process thereof are disclosed, which comprises the following components in percentage by weight: 0< C < 0.08 wt%, 0< Mn < 2.0 wt%, 0< Si < 1.0 wt%, 0< P < 0.04 wt%, 0< S < 0.03 wt%, Cr: 13.5-16.0 wt%, Ni: 24-27 wt%, Mo: 1.0-1.5 wt%, 0< Al is less than or equal to 0.35 wt%, V: 0.1-0.5 wt%, B: 0.03 to 0.10 wt%, and the balance of Fe and inevitable impurities. The high-temperature-resistant high-nickel stainless steel has high plasticity index, elongation and reduction of area, and in cold plastic deformation, the deformation resistance of the material is small, the work hardening rate is low, the yield ratio of the material is small, and the hardness is proper. However, no attention is paid to the fact that the parts of the wire drawing machine which directly contact the stainless steel wire during the drawing process of the wire drawing machine can mix the components or impurities on the parts of the wire drawing machine onto the stainless steel wire in the contact and subsequent drawing processes.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provide an environment-friendly and energy-saving austenite cold heading stainless steel wire, which has the advantages of low yield ratio, high plasticity, good oxidation resistance, good low temperature resistance, good diamagnetism, intergranular corrosion resistance and the like, maximally reduces impurities, and avoids cold heading cracking; 6-pass drawing is changed into 8-pass drawing, and the subsequent annealing process is omitted; the wire coil is changed from 500KG to 1t, so that the wire coil feeding times are reduced.
In order to achieve the purpose, the technical scheme of the invention is to design an environment-friendly energy-saving austenite cold heading stainless steel wire, which comprises the following components in percentage by weight: 0-0.10% of C, 0-0.10% of Si, 9-11% of Mn, 10-12% of Cr, 0.30-1.0% of Mo0.030-0.060% of S, 2-5% of Al, 0-0.04% of P, 0-0.40% of Cu, 0-0.010% of Ti, 0.5-4.5% of Ni, 0.05-0.25% of N, and the balance of Fe and inevitable impurities. P, Cu and Ti elements are reduced, the brittleness of the material can be avoided, and the cold-work hardening rate and plasticity index of the material are improved.
Nickel equivalent:
ni equivalent + Ni% +30 × (C + N)% +0.5 × Mn% +0.3 × Cu%.
Ni is an important element in austenitic stainless steel, and is a preferred element for forming austenite, because the contribution of Ni to stainless steel is various, besides stable austenite can be formed, because Cr-Ni coexists in stainless steel, Ni can promote the stability of stainless steel passive film, can obviously improve the steel-plastic and toughness of stainless steel, can reduce the brittle transition temperature of stainless steel, and has the characteristics of low temperature resistance, diamagnetism, favorable cold formability and weldability and the like. But Ni metal is scarce and high in price, metallurgy experts search for a substitute element of Ni for years, Mn alloy element is a more ideal substitute,
the copper can improve the rust resistance and the corrosion resistance of the stainless steel, and particularly has more obvious effect in reducing media such as sulfuric acid and the like. Copper is a stable and forming austenitic alloying element, which can significantly reduce the stainless strength and the cold work hardening tendency, improve the plasticity of the steel, while having antibacterial properties to the stainless steel surface, but the copper content should not be too high, and it is reasonable to determine the Cu content of the present invention in the range of 1.5-3.5% because the Cu content in the steel increases and the thermoplasticity of the stainless steel decreases.
As can be seen from the formula of nickel equivalent, C and N are two elements with the strongest austenite forming ability and are 30 times of Ni; however, in austenitic stainless steels, C is not generally used as an element forming austenite, and since the strength can be improved as the C content in the steel increases, the ductility, toughness, corrosion resistance, cold formability, weldability, and the like of the steel are significantly reduced, and the disadvantage thereof is considered to be much more serious than the disadvantage, the C content is preferably reduced as much as possible, and the carbon content of the present invention is preferably determined to be 0.06% or less.
In recent years, N is widely applied to austenitic and duplex stainless steels, because the strength of the steel can be obviously improved through solid solution strengthening, and meanwhile, the steel contains a sufficient amount of chromium element, the passivation capability of the steel can be improved through the N, and the corrosion resistance of the austenitic stainless steel is improved;
when the amount of N contained in the steel exceeds a certain amount, for example, when the amount of N in austenitic stainless steel exceeds 0.15, the cold-hot workability and cold formability of the steel are deteriorated, and it is reasonable that the N content is not excessively high, particularly in cold heading steel, and is appropriately controlled to not more than 0.1%.
Cr has a decisive influence on the stainless steel's rust resistance and pitting corrosion resistance, and with the increase of Cr content in stainless steel, not only the corrosion resistance in oxidizing acid medium is increased, but also the resistance of stainless steel to stress corrosion, pitting corrosion, crevice corrosion and the like in chloride solution is improved, so that Cr is an indispensable important element in stainless steel, generally not less than 13%, and the Cr content range of the invention is determined to be 14-17% to be suitable.
After adding Al, Cr and other elements into the steel, the temperature of FeO can be increased, for example, the FeO can appear at 600 ℃ by containing 1% of Cr, the FeO can appear at 800 ℃ by containing 1.1% of Al, and the FeO can appear at a temperature above 800 ℃ if the contents of Cr and Al are higher. The comprehensive use of Cr and Al elements can exert greater oxidation resistance, the steel has good oxidation resistance and better temperature drastic change resistance, and simultaneously the thermal fatigue resistance and the high-temperature corrosion resistance are superior to those of 18-8Cr-Ni stainless steel; in addition, because the steel contains more Al, austenite grains can be coarsened, the tensile strength and the yield strength of the coarse-grain steel wire are reduced, the elongation and the reduction of area are obviously increased, the cold heading performance is greatly improved, and the steel can bear larger cold deformation without cracking, which is the essential point pursued by the invention, and the invention determines that the Al content is in a range of 1-4% to be suitable.
The further technical scheme is that the composition comprises the following components in percentage by weight: 0.05-0.07% of C, 0.4-0.6% of Si, 9.5-10.5% of Mn, 10.5-11.5% of Cr, 0.70-0.90% of Mo, 0.045-0.055% of S, 3-4% of Al, 0.02-0.03% of P, 0.20-0.30% of Cu, 0.004-0.008% of Ti, 2.5-3.5% of Ni, 0.15-0.20% of N, and the balance of Fe and inevitable impurities.
The invention also provides a technical scheme that the process for producing the environment-friendly energy-saving austenite cold heading stainless steel wire comprises the following process steps:
s1: adopting raw material iron ore;
s2: adding the raw materials into an electric arc furnace for heating and melting, and refining molten steel, wherein the sulfur content is controlled to be 0.030-0.060%;
s3: after molten steel in a primary smelting furnace is put into the furnace, mixed gas of Ar and O2 is blown into the furnace, and the content of each element is detected, wherein the blowing process is divided into an oxidation period, a reduction period and a refining period;
s4: continuous casting: pouring molten steel into a continuous casting machine to be changed into a solid state;
s5: continuously rolling to prepare a wire;
s6: preparing a steel wire by using the wire rod prepared in the step S5, wherein the steps are as follows in sequence: and (3) treating the leather membrane, drying, and drawing the dried stainless steel wire rod by a multi-head continuous wire drawing machine for eight passes in total. 6-pass drawing is changed into 8-pass drawing, and the subsequent annealing process is omitted; the wire coil is changed from 500KG to 1t, so that the wire coil feeding times are reduced.
The further technical scheme is that before the step S1, the paying-off wheel and the winding wheel of the wire drawing machine in the step S6 are subjected to surface coating treatment, the surface coating treatment is to select molten steel before a continuous casting process on another production line in simultaneous production, and after the molten steel is selected, the surfaces of wheel faces of wires wound on the paying-off wheel and the winding wheel are rapidly coated with the molten steel manually. The inclusion is one of the main causes of cold heading cracking, and the larger the inclusion particle is, the more easily the inclusion particle is cracked, the size of the inclusion within 2mm from the surface should not be more than 0.15 Lm. Therefore, molten steel coating treatment is carried out on the pay-off wheel and the winding wheel of the current wire drawing machine before drawing, so that the coating materials on the surfaces of the pay-off wheel and the winding wheel and the stainless steel wire to be drawn are the same as each other, and the problem that the cold heading performance is influenced due to the fact that other impurities are mixed on the surface of the wire, the pay-off wheel and the winding wheel are in contact with each other and can be reduced during drawing.
The further technical scheme is that the surfaces of an unwinding wheel and a winding wheel of the wire drawing machine are provided with hard alloy coatings. The surface of the winding wheel and the surface of the paying-off wheel are provided with the hard alloy coatings, so that the winding wheel and the paying-off wheel are not worried about that the surfaces are melted by high-temperature molten steel when contacting the molten steel when coating the molten steel or immersing the winding wheel and the paying-off wheel into the molten steel to obtain the surfaces which are the same as the stainless steel wire to be drawn.
The wire drawing die of the wire drawing machine comprises a cylindrical or truncated cone-shaped hard alloy die core and an annular steel sleeve sleeved outside the die core, wherein a wire drawing hole concentric with the die core is formed in the middle of the die core, and a rectangular groove parallel to the rotation axis of the die core is formed in the inner wall of the wire drawing hole; and a wire drawing die of the wire drawing machine is immersed in the molten steel before the step S1, the molten steel immersion step is to select the molten steel before a continuous casting step on another production line for simultaneous production, the part of the wire drawing die provided with the groove is immersed in the molten steel for 5-20 seconds and then taken out, and in the step S6 in the process treatment on the production line of the wire drawing machine, the wire drawing die rotates at a constant speed during drawing. The wire-drawing die can rotate at a constant speed during drawing, and the wire-drawing die can be driven to rotate or the whole wire-drawing mechanism can rotate to drive the wire-drawing die to rotate after the wire-drawing mechanism is driven; the driving mode is as follows: the wire drawing mechanism is rotatably arranged on a frame of the wire drawing machine, a gear ring is fixedly arranged on the surface of the wire drawing mechanism, a motor and a speed reducer are fixedly arranged on the frame of the wire drawing machine, a gear meshed with the gear ring is fixedly arranged on an output shaft of the speed reducer, and the motor drives the wire drawing mechanism to rotate. Therefore, only the groove of the whole wire-drawing die is coated with the filler which is made of the same material as the wire to be drawn, and the continuous rotation of the wire-drawing die during the drawing process enables the filler filled in the groove to protrude out of the inner wall of the hole to present the best bulge on the inner wall of the hole, so that the filler made of the same material protruding out of the inner wall of the hole firstly contacts the drawn wire during the drawing process, thereby reducing the content of impurities which influence the drawn wire due to the fact that the components on the surface layer of the inner wall of the hole of the wire-drawing die are transferred to the wire during the wire drawing process.
The invention has the advantages and beneficial effects that: carry out molten steel coating to its actinobacillus wheel of present wire drawing machine and wind-up wheel before drawing for the coating material on actinobacillus wheel and wind-up wheel surface and the same material of stainless steel wire rod of treating drawing can reduce like this when drawing because wire rod and actinobacillus wheel and wind-up wheel contact and the surface that produces mix with other inclusion and influence the problem of cold-heading performance. The surface of the winding wheel and the surface of the paying-off wheel are provided with the hard alloy coatings, so that the winding wheel and the paying-off wheel are not worried about that the surfaces are melted by high-temperature molten steel when contacting the molten steel when coating the molten steel or immersing the winding wheel and the paying-off wheel into the molten steel to obtain the surfaces which are the same as the stainless steel wire to be drawn. The whole wire-drawing die is only coated with the filler which is made of the same material as the wire to be drawn in the groove, the filler which is filled in the groove and protrudes out of the inner wall of the hole presents the best bulge on the inner wall of the hole when the wire-drawing die rotates ceaselessly, the filler which is made of the same material and protrudes out of the inner wall of the hole firstly contacts the drawn wire when the wire is drawn, so that the content of impurities which influence the drawn wire due to the fact that components on the surface layer of the inner wall of the hole of the wire-drawing die are transferred to the wire when the wire is drawn is reduced, but the thickness of the filler which protrudes out of the inner wall of the hole and the reducing quantity which needs to be drawn in each pass need to be measured in the mode. The steel has the advantages of low yield ratio, high plasticity, good oxidation resistance, good low temperature resistance, good diamagnetism, intergranular corrosion resistance and the like, and can reduce inclusions to the maximum extent and avoid cold heading cracking; 6-pass drawing is changed into 8-pass drawing, and the subsequent annealing process is omitted; the wire coil is changed from 500KG to 1t, so that the wire coil feeding times are reduced.
Drawings
FIG. 1 is a schematic view of an unwinding wheel and a winding wheel in a second embodiment of the environment-friendly and energy-saving austenite cold-heading stainless steel wire of the invention;
FIG. 2 is a schematic view of a wire-drawing die according to a second embodiment of the present invention after molten steel is submerged therein;
FIG. 3 is a plan view of FIG. 2 before molten steel is submerged.
In the figure: 1. an unwinding wheel and a winding wheel; 2. a hard alloy coating; 3. a mold core; 4. steel jacket; 5. a wire drawing hole; 6. a rectangular groove; 7. a filler; 8. a thin steel layer.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
the invention relates to an environment-friendly energy-saving austenite cold heading stainless steel wire, which comprises the following components in percentage by weight: 0.05-0.07% of C, 0.4-0.6% of Si, 9.5-10.5% of Mn, 10.5-11.5% of Cr, 0.70-0.90% of Mo, 0.045-0.055% of S, 3-4% of Al, 0.02-0.03% of P, 0.20-0.30% of Cu, 0.004-0.008% of Ti, 2.5-3.5% of Ni2, 0.15-0.20% of N, and the balance of Fe and inevitable impurities.
The process for producing the environment-friendly energy-saving austenite cold heading stainless steel wire comprises the following process steps:
s1: adopting raw material iron ore;
s2: adding the raw materials into an electric arc furnace for heating and melting, and refining molten steel, wherein the sulfur content is controlled to be 0.030-0.060%;
s3: after molten steel in a primary smelting furnace is put into the furnace, mixed gas of Ar and O2 is blown into the furnace, and the content of each element is detected, wherein the blowing process is divided into an oxidation period, a reduction period and a refining period;
s4: continuous casting: pouring molten steel into a continuous casting machine to be changed into a solid state;
s5: continuously rolling to prepare a wire;
s6: preparing a steel wire by using the wire rod prepared in the step S5, wherein the steps are as follows in sequence: and (3) treating the leather membrane, drying, and drawing the dried stainless steel wire rod by a multi-head continuous wire drawing machine for eight passes in total.
Example two:
the difference from the first embodiment is that, as shown in fig. 1, in the step S6, the paying-off reel and the winding reel 1 of the drawing machine are subjected to surface coating treatment before the step S1, the surface coating treatment is to select molten steel before a continuous casting process on another production line in the simultaneous production, and after the molten steel is selected, the molten steel is manually and rapidly coated on the surface of the reel face of the wire wound around the paying-off reel and the winding reel 1 to form a thin steel layer 8 on the surface. The surfaces of an unwinding wheel and a winding wheel 1 of the wire drawing machine are provided with hard alloy coatings 2.
Example three:
the difference from the second embodiment is that, as shown in fig. 2 and fig. 3, the wire drawing die of the wire drawing machine comprises a cylindrical or truncated cone-shaped hard alloy die core 3 and an annular steel sleeve 4 sleeved outside the die core 3, a wire drawing hole 5 concentric with the die core 3 is arranged in the middle of the die core 3, and a rectangular groove 6 parallel to the rotation axis of the die core 3 is arranged on the inner wall of the wire drawing hole 5; and a wire drawing die of the wire drawing machine is immersed in the molten steel before the step S1, the molten steel immersion step is to select the molten steel before a continuous casting step on another production line for simultaneous production, the part of the wire drawing die, which is provided with the groove, is immersed in the molten steel for 5-20 seconds and then taken out (only the groove of the wire drawing die is coated with a filler 7 which is made of the same material as the wire to be drawn), and in the step S6 in the process treatment on the production line of the wire drawing machine, the wire drawing die rotates at a constant speed during drawing.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The environment-friendly energy-saving austenite cold heading stainless steel wire is characterized by comprising the following components in percentage by weight: 0-0.10% of C, 0-0.10% of Si, 9-11% of Mn, 10-12% of Cr, 0.30-1.0% of Mo, 0.030-0.060% of S, 0-5% of Al2, 0-0.04% of P, 0-0.40% of Cu, 0-0.010% of Ti, 0.5-4.5% of Ni, 0.05-0.25% of N, and the balance of Fe and inevitable impurities.
2. The environment-friendly energy-saving austenite cold heading stainless steel wire according to claim 1, which is characterized by comprising the following components in percentage by weight: 0.05-0.07% of C, 0.4-0.6% of Si, 9.5-10.5% of Mn, 10.5-11.5% of Cr, 0.70-0.90% of Mo0.045-0.055% of S, 3-4% of Al, 0.02-0.03% of P, 0.20-0.30% of Cu, 0.004-0.008% of Ti0.004, 2.5-3.5% of Ni, 0.15-0.20% of N, and the balance of Fe and inevitable impurities.
3. Process for producing an environmentally friendly and energy saving austenitic cold heading stainless steel wire according to claim 1 or 2, characterized in that it comprises the following process steps:
s1: adopting raw material iron ore;
s2: adding the raw materials into an electric arc furnace for heating and melting, and refining molten steel, wherein the sulfur content is controlled to be 0.030-0.060%;
s3: after molten steel in a primary smelting furnace is charged into the furnace, Ar and O are blown into the furnace2Detecting the content of each element, wherein the blowing process is divided into an oxidation period, a reduction period and a refining period;
s4: continuous casting: pouring molten steel into a continuous casting machine to be changed into a solid state;
s5: continuously rolling to prepare a wire;
s6: preparing a steel wire by using the wire rod prepared in the step S5, wherein the steps are as follows in sequence: and (3) treating the leather membrane, drying, and drawing the dried stainless steel wire rod by a multi-head continuous wire drawing machine for eight passes in total.
4. The process of claim 3, wherein before the step S1, the paying-off wheel and the winding wheel of the wire drawing machine in the step S6 are subjected to surface coating treatment, the surface coating treatment is to select molten steel before a continuous casting process on another production line in simultaneous production, and after the selection of the molten steel, the molten steel is manually and rapidly coated on the surfaces of the wheel faces of the wire wound on the paying-off wheel and the winding wheel.
5. The production process of the environment-friendly energy-saving austenite cold-heading stainless steel wire according to claim 4, wherein the surfaces of an unwinding wheel and a winding wheel of the wire drawing machine are provided with hard alloy coatings.
6. The process for producing an environment-friendly energy-saving austenite cold-heading stainless steel wire as claimed in claim 5, wherein the wire drawing die of the wire drawing machine comprises a cylindrical or truncated cone-shaped hard alloy die core and an annular steel sleeve sleeved outside the die core, the middle part of the die core is provided with a wire drawing hole concentric with the die core, and the inner wall of the wire drawing hole is provided with a rectangular groove parallel to the rotation axis of the die core; and a wire drawing die of the wire drawing machine is immersed in the molten steel before the step S1, the molten steel immersion step is to select the molten steel before a continuous casting step on another production line for simultaneous production, the part of the wire drawing die provided with the groove is immersed in the molten steel for 5-20 seconds and then taken out, and in the step S6 in the process treatment on the production line of the wire drawing machine, the wire drawing die rotates at a constant speed during drawing.
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| CN114054529A (en) * | 2021-11-15 | 2022-02-18 | 南通华东特种钢丝有限公司 | Processing technology of special-shaped steel wire |
| CN114807657A (en) * | 2022-03-30 | 2022-07-29 | 江苏岐铭新材料科技发展有限公司 | High-strength high-toughness multilayer gradient Ti (C, N) -based metal ceramic material and preparation method thereof |
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Application publication date: 20200214 |