CN110951947A - Stainless steel bar easy to punch and cut and production process thereof - Google Patents
Stainless steel bar easy to punch and cut and production process thereof Download PDFInfo
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- CN110951947A CN110951947A CN201911099320.6A CN201911099320A CN110951947A CN 110951947 A CN110951947 A CN 110951947A CN 201911099320 A CN201911099320 A CN 201911099320A CN 110951947 A CN110951947 A CN 110951947A
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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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- 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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
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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
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
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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
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
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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
- C21D1/26—Methods of annealing
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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
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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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
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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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
- C21D6/008—Heat treatment of ferrous alloys containing Si
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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
- C21D8/06—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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- 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
- C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- 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
Abstract
The invention discloses a stainless steel bar easy to punch and cut, which comprises the following components in percentage by weight: 0.02 to 0.07 percent of C, 0.5 to 1.7 percent of Mn, 0.8 to 1.3 percent of Si, 16 to 21 percent of Cr, less than or equal to 0.045 percent of P, 0.8 to 1.2 percent of S, 7.5 to 9.2 percent of Ni, less than or equal to 0.20 percent of Ti, and the balance of iron and inevitable impurities. The invention has low sulfur content, but effectively improves the free-cutting property of the steel, thereby improving the processing efficiency, reducing the cost, but not reducing the corrosion resistance, and overcoming the defects of uneven metal flow, high cost and the like of the stainless steel bar prepared by an extrusion method.
Description
Technical Field
The invention relates to an easy-to-punch and easy-to-cut stainless steel bar and a production process thereof.
Background
Free-cutting stainless steel refers to steel which is resistant to corrosion by weak corrosive media such as air, steam, water and the like and chemical corrosive media such as acid, alkali, salt and the like. Also known as stainless acid resistant steel. In practice, steel resistant to corrosion by weakly corrosive media is often referred to as stainless steel, while steel resistant to corrosion by chemical media is referred to as acid-resistant steel. Due to the difference in chemical composition between the two, the former is not necessarily resistant to corrosion by chemical media, while the latter is generally non-corrosive. The corrosion resistance of stainless steel depends on the alloying elements contained in the steel. Chromium is a basic element for corrosion resistance of stainless steel, and when the chromium content in the steel reaches about 1.2%, the chromium reacts with oxygen in a corrosion medium to form a thin oxide film (self-passivation film) on the surface of the steel, so that further corrosion of the steel substrate can be prevented. During the first world war (1914-1918), Americans firstly discovered the effect of sulfur in steel on improving machinability, and produced low-carbon sulfur-based free-cutting steel for automatic machine tools, and later produced the sulfur-based free-cutting steel for automatic machine tools in English, Su, De, Nie, Fa and other countries and gradually serialized. The sulfur series free-cutting steel has large yield and wide application, and a plurality of novel free-cutting steels are developed on the basis of the sulfur series. After about 1932, the development of free-cutting steel containing lead was started, inspired by lead brass which is excellent in machinability. Because lead is extremely toxic, the technical problems in the aspects of smelting, safety protection and the like at the time are not solved, and lead-containing free-cutting steel is developed in the United states until 1937. With the continuous development of mechanical cutting toward automation, high speed and precision, higher requirements are put on the machinability of materials, and lead-sulfur composite free-cutting steel with better machinability, also called ultra-free-cutting steel, is produced. Thereafter, various lead-sulfur binary and multi-element composite free-cutting steels are successively produced. Tellurium was used as a free-cutting element in free-cutting steels and first appeared in the 1932 patent. In 1961, a tellurium-containing free-cutting steel which is a sulfur-lead-tellurium multi-element composite free-cutting steel is successfully developed in the United states, has excellent machinability and can be compared with free-cutting brass. Selenium and tellurium are often used alternately or simultaneously in steel due to their similar properties and effects. Since the 60 s, improvement of machinability of steel has been studied from another approach, namely, addition of a certain deoxidizing element to produce a desired deoxidized product, a favorable inclusion, which is called as a deoxidation-adjusted free-cutting steel in japan. Although the sulfur element can remarkably improve the cutting performance of the stainless steel, sulfide inclusions formed in the stainless steel by the sulfur element can reduce the mechanical property and the corrosion resistance of the stainless steel.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provide a stainless steel bar for easy punching and cutting, which has low sulfur content, effectively improves the easy cutting property of steel, improves the processing efficiency, reduces the cost, does not reduce the corrosion resistance, and overcomes the defects of uneven metal flow, high cost and the like of the stainless steel bar prepared by an extrusion method.
In order to achieve the purpose, the technical scheme of the invention is to design an easy-to-punch and easy-to-cut stainless steel bar, which comprises the following components in percentage by weight: 0.02 to 0.07 percent of C, 0.5 to 1.7 percent of Mn, 0.8 to 1.3 percent of Si, 16 to 21 percent of Cr, less than or equal to 0.045 percent of P, 0.8 to 1.2 percent of S, 7.5 to 9.2 percent of Ni, less than or equal to 0.20 percent of Ti, and the balance of iron and inevitable impurities. Almost all of C and S form a stable compound TiCS and are uniformly dispersed in the steel, so that the free-cutting property of the steel is effectively improved, the processing efficiency is improved, the cost is reduced, the corrosion resistance is improved, and the cutting property of the stainless steel is improved without using toxic elements such as lead.
The further technical scheme is that the paint comprises the following components in percentage by weight: 0.04 to 0.06 percent of C, 0.8 to 1.3 percent of Mn, 0.9 to 1.1 percent of Si, 18 to 20 percent of Cr, less than or equal to 0.025 percent of P, 0.9 to 1.1 percent of S, 8.5 to 9.0 percent of Ni, less than or equal to 0.20 percent of Ti, and the balance of iron and inevitable impurities.
The invention also provides a technical scheme that the process for producing the stainless steel bar easy to punch and cut comprises the following process steps:
s1: cutting a stainless steel raw material into a cylindrical blank with the diameter of 25-60 mm and the height of 50-100 mm by using a wire cut electrical discharge machine;
s2: placing the prepared cylindrical blank in a heat treatment furnace in the protective atmosphere of Ar or mixed gas of N2 and Ar, heating to 900 ℃ at the heating speed of 6 ℃/min, and preserving heat for 12 hours;
s3: putting the blank processed in the step S2 into a resistance furnace for preheating; preheating to 1050 ℃ at a heating rate of 7 ℃/min, and then keeping the temperature for 2.5 hours;
s4: putting the blank preheated in the step S3 into an extrusion die for hot extrusion to obtain a rod-shaped blank; the extrusion ratio in the hot extrusion is (3-17) to 1, and the extrusion rate is 3-13 mm/s; controlling the hot extrusion temperature to be 1100-1200 ℃; the extrusion die comprises a first die body for enabling metal to flow uniformly and a second die body for extrusion forming, wherein the first die body comprises a plurality of large-diameter sections and small-diameter sections which are continuously arranged at intervals; the temperature of the second mold body is 1100-1200 ℃, and the temperature of the first mold body is 1300-1350 ℃;
s5: and (3) annealing the blank processed in the step S4 in a critical zone and carrying out medium-temperature isothermal quenching, wherein the heating temperature in the critical zone is 750 ℃, keeping the temperature for 1 hour, carrying out isothermal quenching in a 400 ℃ box-type resistance furnace for 80 minutes, and then taking out oil to cool to room temperature. Before hot extrusion, the first die body is arranged in a diameter-changing mode, so that the flowing of the molten steel before extrusion can be uniformly mixed due to speed change of the Bernoulli principle, and then the mixed molten steel is ensured to enter a hot extrusion area, namely the second die body, at a constant speed by the arrangement of the baffle plate, and the defects of uneven metal flowing and high cost of the stainless steel rod prepared by an extrusion method are overcome. The transition section can be arranged between the first die body and the second die body and integrally formed with the die, the transition section is a gradually reducing section or a gradually expanding section, the part of the first die body close to the transition section is a small-diameter section, the transition section is a gradually expanding section, the part of the first die body close to the transition section is a large-diameter section, the transition section is a gradually reducing section, and the transition section plays a role in buffering and storing molten steel to enable the molten steel flow velocity area to tend to be stable. In the step S1, instead of wire electrical discharge machining, turning may be performed, or a commercially available cylindrical steel blank may be used directly.
The further technical scheme is that in the step S4, the large-diameter section and the small-diameter section are integrally arranged, the first die body and the second die body are integrally arranged, a baffle is arranged at a joint of the first die body and the second die body, the baffle and the extrusion die are integrally arranged, and a gap formed by the baffle and the die and used for molten steel to pass through is arched. The term bow as used herein refers to the exponential bow concept: a pattern consisting of chords and arcs subtended by the chords.
The invention has the advantages and beneficial effects that: almost all of C and S form a stable compound TiCS and are uniformly dispersed in the steel, so that the free-cutting property of the steel is effectively improved, the processing efficiency is improved, the cost is reduced, the corrosion resistance is improved, and the cutting property of the stainless steel is improved without using toxic elements such as lead. The sulfur content is not high, but the machinability of the steel is effectively improved, so that the processing efficiency is improved, the cost is reduced, the corrosion resistance is not reduced, and the defects of uneven metal flow, high cost and the like of the stainless steel bar prepared by an extrusion method are overcome; before hot extrusion, the first die body is arranged in a diameter-changing mode, so that the flowing of the molten steel before extrusion can be uniformly mixed due to speed change of the Bernoulli principle, and then the mixed molten steel is ensured to enter a hot extrusion area, namely the second die body, at a constant speed by the arrangement of the baffle plate, and the defects of uneven metal flowing and high cost of the stainless steel rod prepared by an extrusion method are overcome.
Drawings
FIG. 1 is a schematic diagram of the shape of a die involved in the production process of a stainless steel bar for easy punching and cutting according to the present invention;
FIG. 2 is a schematic cross-sectional view of the baffle portion of FIG. 1;
fig. 3 is an exploded view of the first and second mold bodies of fig. 1.
In the figure: 1. a first mold body; 2. a second mold body; 3. a large diameter section; 4. a small diameter section; 5. a baffle plate; 6. a transition section.
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.
As shown in fig. 1 to 3, the invention relates to an easy-to-punch and easy-to-cut stainless steel bar, which comprises the following components in percentage by weight: 0.04 to 0.06 percent of C, 0.8 to 1.3 percent of Mn, 0.9 to 1.1 percent of Si, 18 to 20 percent of Cr, less than or equal to 0.025 percent of P, 0.9 to 1.1 percent of S, 8.5 to 9.0 percent of Ni, less than or equal to 0.20 percent of Ti, and the balance of iron and inevitable impurities.
The process for producing the stainless steel bar for easy punching and cutting comprises the following process steps:
s1: cutting a stainless steel raw material into a cylindrical blank with the diameter of 25-60 mm and the height of 50-100 mm by using a wire cut electrical discharge machine;
s2: placing the prepared cylindrical blank in a heat treatment furnace in the protective atmosphere of Ar or mixed gas of N2 and Ar, heating to 900 ℃ at the heating speed of 6 ℃/min, and preserving heat for 12 hours;
s3: putting the blank processed in the step S2 into a resistance furnace for preheating; preheating to 1050 ℃ at a heating rate of 7 ℃/min, and then keeping the temperature for 2.5 hours;
s4: putting the blank preheated in the step S3 into an extrusion die for hot extrusion to obtain a rod-shaped blank; the extrusion ratio in the hot extrusion is (3-17) to 1, and the extrusion rate is 3-13 mm/s; controlling the hot extrusion temperature to be 1100-1200 ℃; the extrusion die comprises a first die body 1 for enabling metal to flow uniformly and a second die body 2 for extrusion forming, wherein the first die body 1 comprises a plurality of large-diameter sections 3 and small-diameter sections 4 which are continuously arranged at intervals; the temperature of the second mold body 2 is 1100-1200 ℃, and the temperature of the first mold body 1 is 1300-1350 ℃;
s5: and (3) annealing the blank processed in the step S4 in a critical zone and carrying out medium-temperature isothermal quenching, wherein the heating temperature in the critical zone is 750 ℃, keeping the temperature for 1 hour, carrying out isothermal quenching in a 400 ℃ box-type resistance furnace for 80 minutes, and then taking out oil to cool to room temperature.
In step S4, the large diameter section 3 and the small diameter section 4 are integrally provided, the first die body 1 and the second die body 2 are integrally provided, a baffle 5 is provided at a joint of the first die body 1 and the second die body 2, the baffle 5 and the extrusion die are integrally provided, and a gap formed by the baffle 5 and the die for molten steel to pass through is arcuate. A transition section 6 is arranged between the first die body 1 and the second die body 2, the transition section 6 and the die are integrally formed, the transition section 6 is a gradually expanding section, and the part, close to the transition section 6, of the first die body 1 is a small-diameter section 4.
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 (4)
1. The stainless steel bar is characterized by comprising the following components in percentage by weight: 0.02 to 0.07 percent of C, 0.5 to 1.7 percent of Mn, 0.8 to 1.3 percent of Si, 16 to 21 percent of Cr, less than or equal to 0.045 percent of P, 0.8 to 1.2 percent of S, 7.5 to 9.2 percent of Ni, less than or equal to 0.20 percent of Ti, and the balance of iron and inevitable impurities.
2. The stainless steel bar for easy punching and cutting according to claim 1, which comprises the following components in percentage by weight: 0.04 to 0.06 percent of C, 0.8 to 1.3 percent of Mn, 0.9 to 1.1 percent of Si, 18 to 20 percent of Cr, less than or equal to 0.025 percent of P, 0.9 to 1.1 percent of S, 8.5 to 9.0 percent of Ni, less than or equal to 0.20 percent of Ti, and the balance of iron and inevitable impurities.
3. A process for producing a stainless steel bar for free-machining and easy-punching according to claim 1 or 2, comprising the process steps of:
s1: cutting a stainless steel raw material into a cylindrical blank with the diameter of 25-60 mm and the height of 50-100 mm by using a wire cut electrical discharge machine;
s2: placing the prepared cylindrical blank in Ar or N2Heating the mixture in a heat treatment furnace with the protective atmosphere of Ar to 900 ℃ at the heating speed of 6 ℃/min and preserving the heat for 12 hours;
s3: putting the blank processed in the step S2 into a resistance furnace for preheating; preheating to 1050 ℃ at a heating rate of 7 ℃/min, and then keeping the temperature for 2.5 hours;
s4: putting the blank preheated in the step S3 into an extrusion die for hot extrusion to obtain a rod-shaped blank; the extrusion ratio in the hot extrusion is (3-17) to 1, and the extrusion rate is 3-13 mm/s; controlling the hot extrusion temperature to be 1100-1200 ℃; the extrusion die comprises a first die body for enabling metal to flow uniformly and a second die body for extrusion forming, wherein the first die body comprises a plurality of large-diameter sections and small-diameter sections which are continuously arranged at intervals; the temperature of the second mold body is 1100-1200 ℃, and the temperature of the first mold body is 1300-1350 ℃;
s5: and (3) annealing the blank processed in the step S4 in a critical zone and carrying out medium-temperature isothermal quenching, wherein the heating temperature in the critical zone is 750 ℃, keeping the temperature for 1 hour, carrying out isothermal quenching in a 400 ℃ box-type resistance furnace for 80 minutes, and then taking out oil to cool to room temperature.
4. The process of claim 4, wherein in step S4, the major diameter section and the minor diameter section are integrally formed, the first die body and the second die body are integrally formed, a baffle is provided at a junction between the first die body and the second die body, the baffle is integrally formed with the extrusion die, and a gap formed by the baffle and the die for molten steel to pass through is arcuate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528964A (en) * | 2021-07-16 | 2021-10-22 | 浙江青山钢铁有限公司 | Free-cutting high-surface-quality austenitic stainless steel wire and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3724254A (en) * | 1969-11-05 | 1973-04-03 | Cefilac | Extrusion of seamless tubing |
| JPS62274059A (en) * | 1986-05-22 | 1987-11-28 | Hitachi Metals Ltd | Free-cutting age-hardening austenitic tool steel |
| US5089067A (en) * | 1991-01-24 | 1992-02-18 | Armco Inc. | Martensitic stainless steel |
| JP2009091655A (en) * | 2007-09-19 | 2009-04-30 | Daido Steel Co Ltd | Ferritic free-cutting stainless steel |
| CN101876034A (en) * | 2009-05-01 | 2010-11-03 | 衡阳市金则利特种合金有限公司 | Lead-free free-cutting austenitic stainless steel |
| CN102884212A (en) * | 2010-10-06 | 2013-01-16 | 新日铁住金株式会社 | Case hardened steel and method for producing the same |
| CN103205656A (en) * | 2013-01-18 | 2013-07-17 | 沈阳航空航天大学 | Leadless super free cutting austenitic stainless steel and manufacturing method thereof |
| CN105127226A (en) * | 2015-09-24 | 2015-12-09 | 江阴市江顺模具有限公司 | Hot extrusion die for large-wall-thickness solid magnesium alloy |
| CN108642373A (en) * | 2018-04-18 | 2018-10-12 | 江苏理工学院 | A kind of high-temperature oxidation resistant austenitic heat-resistance steel and its preparation process |
| CN109536852A (en) * | 2018-12-13 | 2019-03-29 | 河北工业大学 | A kind of steel pipe preparation method expanding effective TRIP steel |
-
2019
- 2019-11-12 CN CN201911099320.6A patent/CN110951947A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3724254A (en) * | 1969-11-05 | 1973-04-03 | Cefilac | Extrusion of seamless tubing |
| JPS62274059A (en) * | 1986-05-22 | 1987-11-28 | Hitachi Metals Ltd | Free-cutting age-hardening austenitic tool steel |
| US5089067A (en) * | 1991-01-24 | 1992-02-18 | Armco Inc. | Martensitic stainless steel |
| JP2009091655A (en) * | 2007-09-19 | 2009-04-30 | Daido Steel Co Ltd | Ferritic free-cutting stainless steel |
| CN101876034A (en) * | 2009-05-01 | 2010-11-03 | 衡阳市金则利特种合金有限公司 | Lead-free free-cutting austenitic stainless steel |
| CN102884212A (en) * | 2010-10-06 | 2013-01-16 | 新日铁住金株式会社 | Case hardened steel and method for producing the same |
| CN103205656A (en) * | 2013-01-18 | 2013-07-17 | 沈阳航空航天大学 | Leadless super free cutting austenitic stainless steel and manufacturing method thereof |
| CN105127226A (en) * | 2015-09-24 | 2015-12-09 | 江阴市江顺模具有限公司 | Hot extrusion die for large-wall-thickness solid magnesium alloy |
| CN108642373A (en) * | 2018-04-18 | 2018-10-12 | 江苏理工学院 | A kind of high-temperature oxidation resistant austenitic heat-resistance steel and its preparation process |
| CN109536852A (en) * | 2018-12-13 | 2019-03-29 | 河北工业大学 | A kind of steel pipe preparation method expanding effective TRIP steel |
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| CN113528964A (en) * | 2021-07-16 | 2021-10-22 | 浙江青山钢铁有限公司 | Free-cutting high-surface-quality austenitic stainless steel wire and preparation method thereof |
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