CN112474867B - Preparation method of high-temperature alloy hexagonal bar - Google Patents
Preparation method of high-temperature alloy hexagonal bar Download PDFInfo
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- CN112474867B CN112474867B CN202011200935.6A CN202011200935A CN112474867B CN 112474867 B CN112474867 B CN 112474867B CN 202011200935 A CN202011200935 A CN 202011200935A CN 112474867 B CN112474867 B CN 112474867B
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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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- 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
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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
- B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
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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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
Abstract
The invention discloses a preparation method of a high-temperature alloy hexagonal bar, which can solve the problem of drawing cracks of aging strengthening type high-temperature alloy GH4033 and GH2036 hexagonal bars by adopting a warm drawing method, and can obtain excellent surface quality and good mechanical property. In order to achieve the above purpose, the invention adopts the following technical scheme: the preparation method of the warm drawing hexagonal section comprises the following steps: the manufacturing method has the advantages that a novel drawing process is adopted, cold drawing is changed into warm drawing, plasticity in the drawing process of the material is improved, and the hexagonal material with a qualified surface is obtained; selecting a suitable high-temperature lubricant to reduce the friction force on the surface in the drawing process; and thirdly, a proper drawing speed is set, and the drawing resistance in the drawing process is reduced. The invention has the beneficial effects that: the method for preparing GH4033 and GH2036 hexagonal bars by warm drawing belongs to a reasonable and feasible new method between hot rolling and cold drawing forming, and excellent surface quality is obtained.
Description
Technical Field
The invention belongs to the field of metal material manufacturing, relates to a preparation method of a high-temperature alloy hexagonal bar, and particularly relates to a method for producing aging-strengthened nickel-based high-temperature alloy GH4033 and iron-based aging-strengthened alloy GH2036 hexagonal bars by a warm drawing process.
Background
The common steel hexagonal bar is usually prepared by roll forming or cold drawing forming, and the common high-temperature alloy hexagonal bar is also prepared by cold drawing forming. The GH4033 alloy is an age hardening type high-temperature alloy which takes nickel and chromium as matrixes and is added with aluminum and titanium to form a gamma' phase, and the alloy has good high-temperature strength at 750 ℃ and good oxidation resistance below 900 ℃; the GH2036 alloy is VC or M 23 C 6 The iron-based aging strengthening type high-temperature alloy as a main strengthening phase has high carbon content (about 0.34-0.40%). At normal temperature, GH4033 and GH2036 alloys have the characteristics of high strength, poor plasticity, large deformation resistance and large stress after deformation, so that severe drawing cracks are easily generated in the cold drawing process of the GH4033 and GH2036 alloy hexagonal bars, the hexagonal bars cannot be formed, and the failure rate of engineering batch production is extremely high. The GH4033 and GH2036 alloy hexagonal bars are mainly applied to high-strength fasteners in the industries of aviation, aerospace, combustion engines and the like, so that the problem of drawing cracks of the GH4033 and GH2036 alloy hexagonal bars is a difficult problem to be solved urgently.
Disclosure of Invention
The invention discloses a preparation method of a high-temperature alloy hexagonal bar, which can solve the problem of drawing cracks of aging strengthening type high-temperature alloy GH4033 and GH2036 hexagonal bars by adopting a warm drawing method, and can obtain excellent surface quality and good mechanical property.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the preparation method of the warm drawing hexagonal material comprises the steps of loading the annealed blank into a warm drawing furnace for heating, controlling reasonable heating temperature, selecting proper high-temperature lubricant and controlling reasonable drawing speed for drawing.
The specific technical measures are as follows:
1. annealing before blank drawing, fine grinding and polishing the blank surface after annealing, wherein the roughness Ra is not more than 3.2 mu m, and the blank is subjected to fine grinding and polishing to remove crack sources on the original blank surface, so that cracking caused by stress concentration in the drawing process is avoided.
2. Drawing and heating process: and (3) fine grinding the blank, then putting the blank into a warm drawing furnace for heating and heat preservation, wherein the warm drawing temperature is 750-900 ℃, the temperature is raised for 1-2 h, and the heat preservation is not less than 60min.
3. Drawing deformation process: and (4) making a specific drawing deformation process according to the original blank size, the fine grinding size and the drawing specification.
4. Selecting a suitable high temperature lubricant: the lubricant is prepared before drawing, the ratio of the lubricant is 20-40% of graphite powder, 40-70% of soap powder and 10-20% of sulfur powder, and the lubricant is uniformly spread on the surface of the blank in the drawing process to ensure the lubricating effect.
5. Drawing speed: the drawing speed of the cold drawing machine is controlled between 4.0m/min and 8.0 m/min.
The key points of the invention are as follows: the method has the advantages that a novel drawing process is adopted, cold drawing is changed into warm drawing, the plasticity of the material drawing process is improved, and the hexagonal material with qualified surface is obtained; selecting a suitable high-temperature lubricant, and reducing the friction force on the surface in the drawing process; setting a proper drawing speed and reducing the drawing resistance in the drawing process.
The invention has the beneficial effects that: the method for preparing GH4033 and GH2036 hexagonal bars by warm drawing belongs to a reasonable and feasible new method between hot rolling and cold drawing forming, and excellent surface quality is obtained.
Drawings
FIG. 1GH4033 alloy cold-drawn S11mm hexagonal surface condition;
FIG. 2 is a drawing of the alloy GH4033 on the surface of a hexagonal bar with a thickness of S11mm;
FIG. 3 is the surface condition of a hexagonal bar of S19mm obtained by cold-drawing GH2036 alloy;
FIG. 4 is the surface condition of a hexagonal S19mm alloy material obtained by warm drawing of GH2036 alloy.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the embodiments described below.
Example 1
GH4033 alloy original blank size: phi 15mm; fine grinding size: phi 14mm; drawing specification: s11mm.
The method comprises the steps of selecting a warm drawing temperature of 750-900 ℃, heating for 1-2 h, and keeping the temperature for not less than 60min;
the drawing deformation process comprises the following steps: phi 14mm → S12.8mm → annealing → S11.6mm → annealing → S11mm;
the lubricant: preparing a lubricant before drawing, wherein the lubricant comprises 30% of graphite powder, 60% of soap powder and 10% of sulfur powder, and uniformly spreading the lubricant on the surface of a blank in the drawing process to ensure the lubricating effect;
fourth, controlling the drawing speed of the cold drawing machine to be 5m/min;
FIG. 1 shows a cold drawing process of a hexagonal surface of S11mm, and FIG. 2 shows a warm drawing process of the hexagonal surface of S11mm.
Example 2
Size of GH2036 alloy original blank: phi is 24mm; fine grinding size: phi 23mm; drawing specification: s19mm;
the method comprises the steps of selecting a warm drawing temperature at 750-900 ℃, heating for 1-2 h, and keeping the temperature for not less than 60min;
the drawing deformation process comprises the following steps: Φ 23mm → S22mm → annealing → S20.8mm → annealing → S19.6mm → annealing → S19mm;
the lubricant: preparing a lubricant before drawing, wherein the lubricant comprises 35% of graphite powder, 50% of soap powder and 15% of sulfur powder, and uniformly spreading the lubricant on the surface of a blank in the drawing process to ensure the lubricating effect;
the drawing speed of the cold drawing machine is controlled to be 4.5m/min.
FIG. 3 shows the surface of a hexagonal material with a thickness of S19mm by cold drawing, and FIG. 4 shows the surface of a hexagonal material with a thickness of S19mm by warm drawing.
Claims (2)
1. A preparation method of a high-temperature alloy hexagonal bar is characterized in that annealing is carried out before blank drawing, fine grinding and polishing are carried out on the surface of the blank after annealing, the roughness Ra is not more than 3.2 mu m, and the blank is subjected to fine grinding and polishing to remove crack sources on the surface of the original blank;
drawing and heating process: polishing the blank, putting the blank into a warm drawing furnace for heating and heat preservation, wherein the warm drawing temperature is 750-900 ℃, the temperature is raised for 1-2 h, and the heat preservation is not less than 60min;
the method is used for warm drawing of GH4033 alloy, and the dimensions of a GH4033 alloy original blank are as follows: phi 15mm; fine grinding size: phi 14mm; drawing specification: s11mm;
drawing deformation process: Φ 14mm → S12.8mm → anneal → S11.6mm → anneal → S11mm;
lubricant: preparing a lubricant before drawing, wherein the lubricant comprises 30% of graphite powder, 60% of soap powder and 10% of sulfur powder;
drawing speed of a warm drawing machine: 5m/min.
2. The preparation method of the high-temperature alloy hexagonal bar material as claimed in claim 1, wherein for the warm drawing of the GH2036 alloy, the dimensions of the GH2036 alloy raw blank are as follows: phi is 24mm; fine grinding size: phi 23mm; drawing specification: s19mm;
drawing deformation process: Φ 23mm → S22mm → Anneal → S20.8mm → Anneal → S19.6mm → Anneal → S19mm;
lubricant: preparing a lubricant before drawing, wherein the lubricant comprises 35% of graphite powder, 50% of soap powder and 15% of sulfur powder;
drawing speed of a warm drawing machine: 4.5m/min.
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| CN202011200935.6A CN112474867B (en) | 2020-11-02 | 2020-11-02 | Preparation method of high-temperature alloy hexagonal bar |
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| CN112474867B true CN112474867B (en) | 2023-03-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS61217564A (en) * | 1985-03-25 | 1986-09-27 | Hitachi Metals Ltd | Wire drawing method for niti alloy |
| CN1295037C (en) * | 2005-05-10 | 2007-01-17 | 江苏法尔胜技术开发中心 | Sleeve pulling shaping method of nickel titanium base marmem pipe material |
| CN104480415A (en) * | 2014-12-09 | 2015-04-01 | 抚顺特殊钢股份有限公司 | Processing process of difficult-to-deform high temperature alloy GH141 cold-drawn material |
| CN104785556B (en) * | 2015-03-12 | 2016-08-24 | 河北钢铁股份有限公司 | A kind of composite lubricated metal wire rod high temperature Hubbing method |
| CN105127220B (en) * | 2015-07-30 | 2017-11-07 | 攀钢集团江油长城特殊钢有限公司 | A kind of high-strength high-temperature alloy bar material cold-drawing method |
| CN110280619A (en) * | 2019-05-21 | 2019-09-27 | 江苏图南合金股份有限公司 | A kind of high temperature alloy bar silk material preparation method |
| CN110616391B (en) * | 2019-08-05 | 2021-06-04 | 宝鸡好得钛业股份有限公司 | Method for processing high-plasticity medical TC4 titanium alloy bar |
| CN111496003B (en) * | 2020-04-22 | 2022-04-26 | 西安圣泰金属材料有限公司 | TB9 titanium alloy wire rod and manufacturing method thereof |
| CN111808668A (en) * | 2020-08-05 | 2020-10-23 | 陕西高精尖新材料科技有限责任公司 | High-temperature drawing water-based lubricant for titanium alloy wire and preparation method thereof |
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