CN114934163B - Manufacturing method of ultralow-carbon austenitic stainless steel thin-wall seamless pipe suitable for manufacturing cutting ferrule - Google Patents
Manufacturing method of ultralow-carbon austenitic stainless steel thin-wall seamless pipe suitable for manufacturing cutting ferrule Download PDFInfo
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- CN114934163B CN114934163B CN202210367781.2A CN202210367781A CN114934163B CN 114934163 B CN114934163 B CN 114934163B CN 202210367781 A CN202210367781 A CN 202210367781A CN 114934163 B CN114934163 B CN 114934163B
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
- B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
The invention belongs to the field of stainless steel seamless tube processing, and particularly relates to a manufacturing method of an ultralow-carbon austenitic stainless steel thin-wall seamless tube suitable for manufacturing a cutting sleeve. Mainly comprises 4 continuous steps of high-temperature solution treatment, on-line quenching treatment, low-temperature hollow drawing treatment and normal-temperature floating core drawing treatment. The ultra-low carbon austenitic stainless steel thin-wall seamless pipe produced by the method has high overall hardness and strength and good plasticity and toughness, and is very suitable for manufacturing surface-treated cutting sleeve parts such as nitriding or carbonitriding.
Description
Technical Field
The invention belongs to the field of stainless steel seamless tube processing, and particularly relates to a manufacturing method of an ultralow-carbon austenitic stainless steel thin-wall seamless tube suitable for manufacturing a cutting sleeve.
Background
The sleeve-type pipe joint is a common pipeline sealing connection mode and comprises 3 parts of a joint body, a sleeve, a nut and the like. When the cutting sleeve and the nut which are arranged in the connector body are sleeved on the connecting inner pipe, the cutting edge part of the cutting sleeve is gradually pressed into a certain depth of the surface layer of the connecting inner pipe under the action of the rotating thrust of the nut, so that strict sealing conditions are formed. CrNi austenitic stainless steel has excellent corrosion resistance, and is a common material for manufacturing cutting ferrule. After solution treatment and quenching, if the austenitic stainless steel seamless pipe is directly processed into a cutting sleeve, although high corrosion resistance can be ensured, the cutting edge is easy to be dulled when being pressed into the surface layer of the connecting inner pipe due to low yield strength (generally less than 300 MPa) and strong plastic deformation capability; even if surface treatments such as nitriding and carbonitriding are carried out, the hardness of the surface layer of the cutting sleeve can be obviously improved, the cutting edge pressing-in capability is enhanced, and meanwhile, the bending and tipping phenomenon occurs due to high surface hardness and low internal hardness. Thus, austenitic stainless steel tubes used to make ferrules generally require a higher overall hardness or strength. Wherein, in durometer, generally, higher than 320HV is required.
Generally, an austenitic stainless seamless steel pipe is formed by cold rolling or cold drawing at normal temperature, so that the overall hardness and strength of the pipe can be improved by the 2 effects of deformation strengthening and deformation-induced martensitic transformation, and the higher cutting edge hardness can be obtained on the basis of maintaining the overall high hardness by performing low-temperature nitriding or carbonitriding surface treatment subsequently. However, austenitic stainless steel seamless tubes have a large temperature rise during continuous cold drawing or cold rolling processes, even up to 100 ℃. In this case, even with a large cold deformation amount, it is difficult to obtain sufficient deformation-induced transformation martensite, and the deformation strengthening effect is mainly relied on, resulting in difficulty in achieving the required overall hardness or strength requirement. If the cold deformation amount is further increased, not only is higher requirement on forming equipment made, but also for austenitic stainless steel precision pipes with high dimensional accuracy requirement, after cold rolling or cold drawing, a floating core drawing treatment is needed to achieve final dimensional accuracy, which requires that the pipes after cold rolling or cold drawing still have higher plastic deformation capability, so that the extremely large cold deformation amount cannot be adopted to obtain high hardness or strength. If austenitic stainless steel with higher carbon content is adopted, deformation-induced martensitic transformation is easy to occur during cold deformation, and enough overall hardness and strength are easy to obtain, but carbide is easy to precipitate in a ferrite matrix during the subsequent long-time nitriding or carbonitriding treatment, so that the brittleness of the material is increased. Therefore, in general, only by adopting ultra-low carbon (less than 0.03% C) austenitic stainless steel and obtaining deformation-induced martensite with a larger volume fraction under the condition of smaller cold rolling or cold rolling deformation, the high overall strength or hardness can be obtained, and meanwhile, the high room temperature plasticity can be maintained, so that the dimensional accuracy control is carried out for the drawing of the floating core print, and the high surface hardness of the cutting edge is obtained in the subsequent nitriding or carbonitriding surface treatment process, and the high overall strength and toughness are maintained. However, cold deformation of ultra-low carbon austenitic stainless steel is difficult to induce martensitic transformation, and the volume fraction of martensite can be increased only by sufficiently reducing the deformation temperature. For cold rolling forming of the pipe, the outer surface of the pipe needs to be lubricated by oil, and the core rod needs to be filled in the pipe, so that the cooling treatment of the pipe cannot be performed in advance, and the deformation-induced martensitic transformation is improved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a manufacturing method of an ultralow-carbon austenitic stainless steel thin-wall seamless pipe suitable for manufacturing a cutting sleeve.
The technical scheme for realizing the aim of the invention is as follows: the manufacturing method of the ultra-low carbon austenitic stainless steel thin-wall seamless pipe suitable for manufacturing the cutting ferrule comprises the following specific steps:
s1, high-temperature solid solution treatment: heating the stainless steel pipe in a gas protection heating furnace to 1000-1100 ℃ and preserving heat for 10-60min to form a high-temperature solid solution;
s2, online quenching treatment: rapidly cooling the stainless steel pipe subjected to the high-temperature solution treatment in the step S1 to room temperature to obtain supersaturated solid solution;
s3, low-temperature hollow drawing treatment: introducing liquid nitrogen from the inside of the stainless steel pipe subjected to online quenching treatment in the step S2 by adopting a slender heat preservation pipe, controlling the flow rate of the liquid nitrogen, cooling the pipe at the front end of the drawing die to-20 to 70 ℃, and then carrying out low-temperature hollow drawing treatment with the elongation of 10-25%;
s4, drawing treatment of normal-temperature floating core heads: and under the condition of room temperature, the hollow drawn pipe is subjected to floating core drawing treatment with the diameter reduction within 10-30m, so that the pipe meets the requirement of final dimensional accuracy.
Further, the heating protection atmosphere in the gas protection heating furnace in the step S1 is ammonia decomposition gas.
Further, in the step S2, an online quenching mode of spraying ammonia decomposition gas at the outlet position of the gas protection heating furnace is adopted.
After the technical scheme is adopted, the invention has the following positive effects:
(1) The method is suitable for low-temperature hollow drawing continuous production of ultra-low carbon austenitic stainless steel thin-wall seamless tubes, and can obtain deformation-induced transformation martensite to a greater extent on the basis of smaller cold drawing deformation, so that the overall hardness and strength of the tubes are remarkably improved, and meanwhile, higher toughness and plasticity are maintained. The ultra-low carbon austenitic stainless steel thin-wall seamless pipe manufactured by the method has the overall hardness of 320-400HV, the tensile strength of not less than 1100MPa, the yield strength of not less than 1000MPa and the elongation at break of not less than 8%, and is very suitable for manufacturing cutting sleeve parts requiring nitriding or carbonitriding surface treatment.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
Fig. 1 is a schematic drawing of a low temperature hollow drawing.
Detailed Description
The invention is further described in detail with reference to examples: the experimental material is selected from 316Ti austenitic stainless steel pipe, the outer diameter is 20mm, the inner diameter is 16mm, and the wall thickness is 2mm. The microhardness test of the pipe adopts an HV-1000 microhardness meter, and the holding time is 15s; the tensile property test of the pipe adopts a WDT-200 tester, the tensile speed is 2mm/min, and the tensile strength, the yield strength and the elongation at break are obtained; the volume fraction of the martensite of the pipe is measured by adopting an X-ray diffraction method; the carbonitriding treatment of the pipe is carried out by adopting conventional ammonia gas and methane decomposed gas, the heating temperature is 420 ℃, and the heat preservation time is 12 hours. The ultra-low carbon austenitic stainless steel thin-wall seamless pipe manufactured according to the process has the overall hardness of 320-400HV, the tensile strength of not less than 1100MPa, the yield strength of not less than 1000MPa and the elongation at break of not less than 8%, and is particularly suitable for manufacturing cutting sleeve parts which need to be subjected to surface treatment such as nitriding or carbonitriding.
Example 1
As can be seen in figure 1 of the drawings,
firstly, an ultralow-carbon 316L austenitic stainless steel seamless pipe with the outer diameter of 20mm, the inner diameter of 16mm and the wall thickness of 2mm is fed into a mesh belt furnace protected by ammonia decomposition gas and heated to 1050 ℃, ammonia decomposition gas is blown at an outlet position of a furnace door after the solid solution time of the stainless steel seamless pipe 1 reaches 30min by controlling the conveying speed of the mesh belt, and the stainless steel seamless pipe 1 is quenched on line to room temperature; then, mounting the quenched stainless steel seamless pipe 1 on a drawing fixture 2, conveying liquid nitrogen from the inside of the stainless steel seamless pipe 1 to the front end of the drawing fixture 2 by adopting an elongated heat-preserving pipe 3, controlling the flow of the liquid nitrogen to reduce the temperature of the stainless steel seamless pipe 1 to about minus 40 ℃, and performing low-temperature hollow drawing treatment with the elongation percentage of 15%; and finally, carrying out floating core drawing treatment on the low-temperature hollow drawn stainless steel seamless pipe 1 at normal temperature, and controlling the diameter reduction to be 20 mu m, so that the stainless steel seamless pipe 1 meets the final dimensional accuracy requirement.
The tensile property test shows that the tensile strength of the moving core drawing stainless steel seamless pipe 1 is 1135MPa, the yield strength is 1041MPa, the elongation at break is 9.5%, the wall thickness center hardness of the stainless steel seamless pipe 1 is 362HV, and the surface hardness is 366HV. The volume fraction of martensite in the stainless steel seamless pipe 1 reaches 37 percent by X-ray diffraction measurement. Further, the stainless steel seamless pipe 1 is subjected to 420 ℃/12h low-temperature carbonitriding treatment, the tensile strength of the stainless steel seamless pipe 1 is 1098MPa, the yield strength is 1026MPa, the fracture elongation is 10.4%, the wall thickness center hardness of the stainless steel seamless pipe 1 is 358HV, and the surface carburized layer hardness is 1020HV.
Example 2
Firstly, an ultralow-carbon 316L austenitic stainless steel seamless pipe with the outer diameter of 20mm, the inner diameter of 16mm and the wall thickness of 2mm is fed into a mesh belt furnace protected by ammonia decomposition gas to be heated to 1100 ℃, ammonia decomposition gas is blown at an outlet position of a furnace door after the solution time of the stainless steel seamless pipe 1 reaches 10min by controlling the conveying speed of the mesh belt, and the stainless steel seamless pipe 1 is quenched on line to room temperature; then, mounting the quenched stainless steel seamless pipe 1 on a drawing fixture 2, conveying liquid nitrogen from the inside of the stainless steel seamless pipe 1 to the front end of the drawing fixture 2 by adopting an elongated heat-preserving pipe 3, controlling the flow of the liquid nitrogen to reduce the temperature of the stainless steel seamless pipe 1 to about-70 ℃ and performing low-temperature hollow drawing treatment with the elongation percentage of 10%; and finally, carrying out floating core drawing treatment on the low-temperature hollow drawn stainless steel seamless pipe 1 at normal temperature, and controlling the diameter reduction to be 10 mu m, so that the stainless steel seamless pipe 1 meets the final dimensional accuracy requirement.
The tensile property test shows that the tensile strength of the moving core drawing stainless steel seamless pipe 1 is 1185MPa, the yield strength is 1102MPa, the breaking elongation is 9.8%, the wall thickness center hardness of the stainless steel seamless pipe 1 is 371HV, and the surface hardness is 375HV. The volume fraction of martensite in the stainless steel seamless pipe 1 reaches 47 percent by X-ray diffraction measurement. Further, the stainless steel seamless pipe 1 is subjected to 420 ℃/12h low-temperature carbonitriding treatment, the tensile strength of the stainless steel seamless pipe 1 is 1168MPa, the yield strength is 1095MPa, the fracture elongation is 10.3%, the wall thickness center hardness of the stainless steel seamless pipe 1 is 370HV, and the surface carburized layer hardness is 995HV.
Example 3
Firstly, an ultralow-carbon 316L austenitic stainless steel seamless pipe with the outer diameter of 20mm, the inner diameter of 16mm and the wall thickness of 2mm is fed into a mesh belt furnace protected by ammonia decomposition gas to be heated to 1000 ℃, the solid solution treatment time of the stainless steel seamless pipe 1 reaches 60 minutes by controlling the conveying speed of the mesh belt, and then ammonia decomposition gas is blown at the outlet of the mesh belt furnace, and the stainless steel seamless pipe 1 is quenched on line to room temperature; then, mounting the quenched stainless steel seamless pipe 1 on a drawing fixture 2, conveying liquid nitrogen from the inside of the steel pipe to the front end of the drawing fixture 2 by adopting an elongated heat-preserving pipe 3, controlling the flow of the liquid nitrogen to reduce the temperature of the stainless steel seamless pipe 1 to about minus 30 ℃ and carrying out blank drawing treatment with the elongation of 20%; and finally, carrying out floating core drawing treatment on the low-temperature blank drawn stainless steel seamless pipe 1 at normal temperature, and controlling the diameter reduction to be 30 mu m to meet the final precision requirement of the size of the stainless steel seamless pipe 1.
The tensile property test shows that the tensile strength of the moving core drawing stainless steel seamless pipe 1 is 1206MPa, the yield strength is 1185MPa, the breaking elongation is 9.4%, the wall thickness center hardness of the stainless steel seamless pipe 1 is 376HV, and the surface hardness is 379HV. The volume fraction of martensite in the pipe reaches 42% by X-ray diffraction measurement. Further, the stainless seamless pipe 1 is subjected to 420 ℃/12h low-temperature carbonitriding treatment, the tensile strength of the stainless seamless pipe 1 is 1192MPa, the yield strength is 1166MPa, the fracture elongation is 9.9%, the wall thickness center hardness of the stainless seamless pipe 1 is 372HV, and the surface carburized layer hardness is 1014HV.
Example 4
Firstly, an ultralow-carbon 316L austenitic stainless steel seamless pipe with the outer diameter of 20mm, the inner diameter of 16mm and the wall thickness of 2mm is fed into a mesh belt furnace protected by ammonia decomposition gas to be heated to 1100 ℃, the solid solution treatment time of the stainless steel seamless pipe 1 reaches 10min by controlling the conveying speed of the mesh belt, and then ammonia decomposition gas is blown at the outlet of the mesh belt furnace, and the stainless steel seamless pipe 1 is quenched on line to room temperature; then, mounting the quenched stainless steel seamless pipe 1 on a drawing fixture 2, conveying liquid nitrogen from the inside of the steel pipe to the front end of the drawing fixture 2 by adopting an elongated heat-preserving pipe 3, controlling the flow of the liquid nitrogen to reduce the temperature of the stainless steel seamless pipe 1 to about minus 20 ℃ and carrying out blank drawing treatment with the elongation percentage of 25%; and finally, carrying out floating core drawing treatment on the low-temperature blank drawn stainless steel seamless pipe 1 at normal temperature, and controlling the diameter reduction to be 10 mu m to meet the final precision requirement of the size of the stainless steel seamless pipe 1.
The tensile property test shows that the tensile strength of the drawn stainless steel seamless pipe 1 is 1104MPa, the yield strength is 1063MPa, the breaking elongation is 9.6%, the wall thickness center hardness of the stainless steel seamless pipe 1 is 348HV, and the surface hardness is 350HV. The volume fraction of martensite in the stainless steel seamless pipe 1 reaches 32 percent by X-ray diffraction measurement. Further, the stainless steel seamless pipe 1 is subjected to 420 ℃/12h low-temperature carbonitriding treatment, the tensile strength of the stainless steel seamless pipe 1 is 1062MPa, the yield strength is 1027MPa, the elongation at break is 10.1%, the wall thickness center hardness of the stainless steel seamless pipe 1 is 344HV, and the surface carburized layer hardness is 1026HV.
Example 5
Firstly, an ultralow-carbon 316L austenitic stainless steel seamless pipe with the outer diameter of 20mm, the inner diameter of 16mm and the wall thickness of 2mm is fed into a mesh belt furnace protected by ammonia decomposition gas to be heated to 1100 ℃, the solid solution treatment time of the stainless steel seamless pipe 1 reaches 60min by controlling the conveying speed of the mesh belt, and then ammonia decomposition gas is blown at the outlet of the mesh belt furnace, and the stainless steel seamless pipe 1 is quenched on line to room temperature; then, mounting the quenched stainless steel seamless pipe 1 on a drawing fixture 2, conveying liquid nitrogen from the inside of the steel pipe to the front end of the drawing fixture 2 by adopting an elongated heat-preserving pipe 3, controlling the flow of the liquid nitrogen to reduce the temperature of the stainless steel seamless pipe 1 to about-70 ℃ and carrying out blank drawing treatment with the elongation of 25%; and finally, carrying out floating core drawing treatment on the low-temperature blank drawn stainless steel seamless pipe 1 at normal temperature, and controlling the diameter reduction to be 10 mu m to meet the final precision requirement of the size of the stainless steel seamless pipe 1.
The tensile property test shows that the tensile strength of the drawn stainless steel seamless pipe 1 is 1320MPa, the yield strength is 1294MPa, the fracture elongation is 8.3%, the wall thickness center hardness of the stainless steel seamless pipe 1 is 394HV, and the surface hardness is 396HV. The volume fraction of martensite in the stainless steel seamless pipe 1 reaches 53 percent by X-ray diffraction measurement. Further, the stainless steel seamless pipe 1 is subjected to 420 ℃/12h low-temperature carbonitriding treatment, the tensile strength of the stainless steel seamless pipe 1 is 1298MPa, the yield strength is 1180MPa, the fracture elongation is 8.7%, the thickness center hardness of the wall of the stainless steel seamless pipe 1 is 391HV, and the surface carburized layer hardness is 1037HV.
Comparative example 1
Firstly, an ultralow-carbon 316L austenitic stainless steel seamless pipe with the outer diameter of 20mm, the inner diameter of 16mm and the wall thickness of 2mm is fed into a mesh belt furnace protected by ammonia decomposition gas and heated to 1050 ℃, ammonia decomposition gas is blown at an outlet position of a furnace door after the solid solution time of the stainless steel seamless pipe 1 reaches 30min by controlling the conveying speed of the mesh belt, and the stainless steel seamless pipe 1 is quenched on line to room temperature; then, mounting the quenched stainless steel seamless pipe 1 on a drawing fixture 2, and performing normal-temperature hollow drawing treatment with the elongation of 15%; and finally, carrying out floating core drawing treatment on the low-temperature hollow drawn stainless steel seamless pipe 1 at normal temperature, and controlling the diameter reduction to be 20 mu m, so that the stainless steel seamless pipe 1 meets the final dimensional accuracy requirement.
The tensile property test shows that the tensile strength of the moving core drawing stainless steel seamless pipe 1 is 854MPa, the yield strength is 816MPa, the breaking elongation is 12.6%, the wall thickness center hardness of the stainless steel seamless pipe 1 is 268HV, and the surface hardness is 272HV. The volume fraction of martensite in the stainless steel seamless pipe 1 reaches 7 percent by X-ray diffraction measurement. Further, the stainless steel seamless pipe 1 is subjected to 420 ℃/12h low-temperature carbonitriding treatment, the tensile strength of the stainless steel seamless pipe 1 is 846MPa, the yield strength is 802MPa, the fracture elongation is 13.2%, the thickness center hardness of the wall of the stainless steel seamless pipe 1 is 264HV, and the surface hardness is 988HV.
From comparison of the test results of example 1 and comparative example 1, it was found that the ultra-low carbon austenitic stainless seamless stainless steel seamless pipe 1 subjected to the low temperature hollow drawing treatment cooled by liquid nitrogen was larger in strength and hardness than the normal temperature hollow drawing stainless steel seamless pipe 1 and higher in elongation at break. The stainless steel seamless pipe 1 can obtain high strength, high hardness and good plasticity at the same time after being subjected to low-temperature carbonitriding treatment at 420 ℃/12 h.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (3)
1. A manufacturing method of an ultralow-carbon austenitic stainless steel thin-wall seamless pipe suitable for manufacturing a cutting sleeve is characterized by comprising the following steps of: the method adopts an ultra-low carbon 316L austenitic stainless steel seamless steel pipe, and comprises the following specific steps:
s1, high-temperature solution treatment: heating the stainless steel pipe in a gas protection heating furnace to 1000-1100 ℃ and preserving heat for 10-60min to form a high-temperature solid solution;
s2, online quenching treatment: rapidly cooling the stainless steel pipe subjected to the high-temperature solution treatment in the step S1 to room temperature to obtain supersaturated solid solution;
s3, low-temperature hollow drawing treatment: introducing liquid nitrogen from the inside of the stainless steel pipe subjected to online quenching treatment in the step S2 by adopting a slender heat preservation pipe, controlling the flow rate of the liquid nitrogen, cooling the pipe at the front end of the drawing die to-20 to 70 ℃, and then carrying out low-temperature hollow drawing treatment with the elongation of 10-25%;
s4, normal-temperature floating core drawing treatment: and (3) under the condition of room temperature, carrying out floating core drawing treatment on the hollow drawn pipe with the diameter reduction within 10-30 mu m, so that the stainless steel pipe meets the final dimensional accuracy requirement.
2. The method for manufacturing the ultra-low carbon austenitic stainless steel thin-wall seamless tube according to claim 1, wherein the method comprises the following steps: and (2) the heating protective atmosphere in the gas protective heating furnace in the step (S1) is ammonia decomposition gas.
3. The method for manufacturing the ultra-low carbon austenitic stainless steel thin-wall seamless tube according to claim 1, wherein the method comprises the following steps: and S2, adopting an online quenching mode of spraying ammonia decomposition gas at the outlet position of the gas protection heating furnace.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09276907A (en) * | 1996-04-12 | 1997-10-28 | Sumitomo Metal Ind Ltd | Manufacture of austenitic stainless steel seamless tube |
| CN102463269A (en) * | 2010-11-05 | 2012-05-23 | 苏州贝思特金属制品有限公司 | Manufacture method for seamless steel tube |
| JP2016132789A (en) * | 2015-01-16 | 2016-07-25 | Ｊｆｅスチール株式会社 | Manufacturing method of high strength two phase stainless seamless steel pipe |
| JP2016183404A (en) * | 2015-03-25 | 2016-10-20 | Ｊｆｅスチール株式会社 | Method for producing dual phase stainless seamless steel tube |
| CN106702259A (en) * | 2016-11-29 | 2017-05-24 | 山西太钢不锈钢股份有限公司 | Manufacturing method of wolfram-contained austenite stainless steel seamless tube |
| CN106755770A (en) * | 2016-11-25 | 2017-05-31 | 西安诺博尔稀贵金属材料有限公司 | The processing method for improving Austenitic stainless steel pipe material inner surface quality |
| CN113125286A (en) * | 2021-04-02 | 2021-07-16 | 常州市联谊特种不锈钢管有限公司 | Treatment method for improving wear resistance of inner wall of small-caliber austenitic stainless steel pipe |
| CN113373289A (en) * | 2021-04-27 | 2021-09-10 | 常州市联谊特种不锈钢管有限公司 | Thermomechanical treatment method for improving bending property of austenitic stainless steel pipe |
| CN114160604A (en) * | 2021-11-23 | 2022-03-11 | 浙江久立特材科技股份有限公司 | Stainless steel seamless pipe and preparation method and application thereof |
| CN114522999A (en) * | 2022-02-17 | 2022-05-24 | 南京沃尔德特钢有限公司 | High-toughness chemical corrosion-resistant austenitic stainless steel pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101506392B (en) * | 2006-06-29 | 2011-01-26 | 特纳瑞斯连接股份公司 | Seamless precision steel tubes with improved isotropic toughness at low temperature for hydraulic cylinders and process for obtaining the same |
| JP5846555B2 (en) * | 2011-11-30 | 2016-01-20 | 国立研究開発法人物質・材料研究機構 | Nickel-free high-nitrogen stainless steel rolling / drawing method, nickel-free high-nitrogen stainless steel seamless tubule and method for producing the same |
-
2022
- 2022-04-02 CN CN202210367781.2A patent/CN114934163B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09276907A (en) * | 1996-04-12 | 1997-10-28 | Sumitomo Metal Ind Ltd | Manufacture of austenitic stainless steel seamless tube |
| CN102463269A (en) * | 2010-11-05 | 2012-05-23 | 苏州贝思特金属制品有限公司 | Manufacture method for seamless steel tube |
| JP2016132789A (en) * | 2015-01-16 | 2016-07-25 | Ｊｆｅスチール株式会社 | Manufacturing method of high strength two phase stainless seamless steel pipe |
| JP2016183404A (en) * | 2015-03-25 | 2016-10-20 | Ｊｆｅスチール株式会社 | Method for producing dual phase stainless seamless steel tube |
| CN106755770A (en) * | 2016-11-25 | 2017-05-31 | 西安诺博尔稀贵金属材料有限公司 | The processing method for improving Austenitic stainless steel pipe material inner surface quality |
| CN106702259A (en) * | 2016-11-29 | 2017-05-24 | 山西太钢不锈钢股份有限公司 | Manufacturing method of wolfram-contained austenite stainless steel seamless tube |
| CN113125286A (en) * | 2021-04-02 | 2021-07-16 | 常州市联谊特种不锈钢管有限公司 | Treatment method for improving wear resistance of inner wall of small-caliber austenitic stainless steel pipe |
| CN113373289A (en) * | 2021-04-27 | 2021-09-10 | 常州市联谊特种不锈钢管有限公司 | Thermomechanical treatment method for improving bending property of austenitic stainless steel pipe |
| CN114160604A (en) * | 2021-11-23 | 2022-03-11 | 浙江久立特材科技股份有限公司 | Stainless steel seamless pipe and preparation method and application thereof |
| CN114522999A (en) * | 2022-02-17 | 2022-05-24 | 南京沃尔德特钢有限公司 | High-toughness chemical corrosion-resistant austenitic stainless steel pipe |
Non-Patent Citations (1)
| Title |
|---|
| 15Mn26Al4低温无磁钢管的生产工艺;张永昌等;《钢管技术》(第第5期期);全文 * |
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