CN117600772A - Manufacturing method and application of core rod for warm-rolled titanium alloy tube - Google Patents
Manufacturing method and application of core rod for warm-rolled titanium alloy tube Download PDFInfo
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- CN117600772A CN117600772A CN202311466990.3A CN202311466990A CN117600772A CN 117600772 A CN117600772 A CN 117600772A CN 202311466990 A CN202311466990 A CN 202311466990A CN 117600772 A CN117600772 A CN 117600772A
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- titanium alloy
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000956 alloy Substances 0.000 claims abstract description 17
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 11
- 238000003754 machining Methods 0.000 claims abstract description 11
- 239000010936 titanium Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 238000005098 hot rolling Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 238000009785 tube rolling Methods 0.000 abstract description 4
- 238000004321 preservation Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention discloses a manufacturing method and application of a mandrel for warm rolling a titanium alloy tube, wherein the manufacturing method comprises the following steps: the high-temperature alloy raw material comprises the following components (less than or equal to 0.08% of C, 17.00-20.00% of Cr, 5.00-8.00% of Co, 5.00-7.00% of W, 3.50-4.50% of Mo, 1.70-2.40% of Al, 1.00-1.50% of Ti, less than or equal to 2.00% of Fe, less than or equal to 0.010% of Mg, less than or equal to 0.005% of B, less than or equal to 0.020% of Ce, less than or equal to 0.50% of Si, less than or equal to 0.40% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S and the balance of Ni) by mass percent; machining the high-temperature alloy raw material into a rudiment core rod in a machining mode; the invention adopts a high-temperature alloy material (ZSG) as the raw material of a titanium alloy tube rolling tool and die, has good strength, hardness, stability and heat resistance at 700-980 ℃, and ensures the dimensional stability and precision of the processed product.
Description
Technical Field
The invention relates to the technical field of hot work die steel processing, in particular to a manufacturing method and application of a core rod for warm rolling a titanium alloy tube.
Background
At present, in the titanium alloy pipe processing industry, the material is difficult to cold-roll, and the original cold-roll processing is replaced by warm rolling, but the mandrel material is provided with higher use requirements on strength, hardness, stability and heat resistance.
In the mold processing industry, the prior hot-work mold materials in China comprise 5CrMnMo, 5CrNiMo, 3CrW8V, 8Cr3 and the like, the newly developed hot-work mold materials comprise 5Cr4Mo3SiMnVAl, 3Cr3Mo3W2V, 5Cr4W5Mo2V, 4CrMnSiMoV, 7Mn15Cr2Al3V2WMo (7 Mn 15), and the commonly used hot-work mold materials introduced abroad comprise FT416, 1.2344, SKD-61, 8566, H10, H11, H13 and W2, but the materials have low strength, low hardness (generally not more than 300 HV) at 700-980 ℃, poor stability and heat resistance, and the dimensional accuracy of the processed products is poor.
In order to overcome the defects of the existing hot-working die material, the defects of the conventional hot-working die material are changed, the strength, hardness, stability and heat resistance of the hot-working die material at 700-980 ℃ are improved, and the dimensional accuracy of the processed product is ensured.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the invention, which should not be used to limit the scope of the invention.
The present invention has been made in view of the above-described problems associated with the conventional method for manufacturing a mandrel bar for warm rolling a titanium alloy tube.
It is therefore an object of the present invention to provide a method for manufacturing a mandrel for warm rolling a titanium alloy tube, which aims to solve the performance requirements of the mandrel in the warm rolling temperature range of the titanium alloy tube.
In order to solve the technical problems, the invention provides the following technical scheme:
a method of manufacturing a mandrel for warm rolling a titanium alloy tube, the method comprising the steps of:
step one: selecting a high-temperature alloy material as a raw material for producing the core rod;
step two: machining the high-temperature alloy raw material into a rudiment core rod in a machining mode;
step three: performing solution treatment on the rudiment core rod, namely performing heat treatment on the core rod, heating the rudiment core rod to high temperature, and then performing water cooling to room temperature;
step four: aging the core rod finished in the third step again, namely, carrying out secondary heating on the core rod, discharging from a furnace, and air-cooling to room temperature;
step five: and (3) carrying out finish machining and polishing treatment on the rudiment core rod after the heat treatment to obtain a finished core rod meeting the requirements of dimensional accuracy and surface roughness.
As a preferred embodiment of the method for producing a mandrel for hot rolling a titanium alloy tube according to the present invention, the method comprises: the high-temperature alloy raw material in the first step comprises the following components in percentage by mass: less than or equal to 0.08 percent of C, 17.00 to 20.00 percent of Cr, 5.00 to 8.00 percent of Co, 5.00 to 7.00 percent of W, 3.50 to 4.50 percent of Mo, 1.70 to 2.40 percent of Al, 1.00 to 1.50 percent of Ti, less than or equal to 2.00 percent of Fe, less than or equal to 0.010 percent of Mg, less than or equal to 0.005 percent of B, less than or equal to 0.020 percent of Ce, less than or equal to 0.50 percent of Si, less than or equal to 0.40 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, and the balance of Ni.
As a preferred embodiment of the method for producing a mandrel for hot rolling a titanium alloy tube according to the present invention, the method comprises: in the third step, the core rod is heated to 1020-1100 ℃ and then is kept for 20-40 min.
As a preferred embodiment of the method for producing a mandrel for hot rolling a titanium alloy tube according to the present invention, the method comprises: in the fourth step, the core rod is heated to 750-850 ℃ for the second time and then is kept for 3-5 hours.
The mandrel material produced in the fifth step is rolled at 700-980 deg.c according to the requirement of the working condition.
The invention has the beneficial effects that:
1. the invention selects a high-temperature alloy material (ZSG) as the raw material of the titanium alloy tube rolling tool and die, has good strength, hardness, stability and heat resistance at 700-980 ℃, and ensures the dimensional stability and precision of the processed product;
2. the heat treatment process for processing the high-temperature alloy core rod adopts 1020-1100 ℃ heat preservation for 20-40 min solid solution (water cooling), 750-850 ℃ aging heat preservation for 3-5 h discharging air cooling, improves the hardness and the service life of a working die, thereby greatly saving the consumption of the rolling working die, reducing the production cost of products, and improving the dimensional stability and the precision of the products.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic view showing the conditions of use of a mandrel for warm rolling a titanium alloy tube according to the present invention.
Fig. 2 is a schematic structural diagram of the performance test result of a mandrel for warm rolling titanium alloy tubes according to the present invention.
Fig. 3 is a flowchart of a method for manufacturing a mandrel for warm rolling a titanium alloy tube according to the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Further, in describing the embodiments of the present invention in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Example 1
Referring to fig. 1, for a first embodiment of the present invention, there is provided a method of manufacturing a mandrel for warm rolling a titanium alloy tube, the method comprising the steps of:
step one: selecting a high-temperature alloy material as a raw material for producing the core rod;
specifically, the high-temperature alloy raw material in the first step comprises the following components in percentage by mass: less than or equal to 0.08 percent of C, 17.00 to 20.00 percent of Cr, 5.00 to 8.00 percent of Co, 5.00 to 7.00 percent of W, 3.50 to 4.50 percent of Mo, 1.70 to 2.40 percent of Al, 1.00 to 1.50 percent of Ti, less than or equal to 2.00 percent of Fe, less than or equal to 0.010 percent of Mg, less than or equal to 0.005 percent of B, less than or equal to 0.020 percent of Ce, less than or equal to 0.50 percent of Si, less than or equal to 0.40 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, and the balance of Ni.
Step two: machining the high-temperature alloy raw material into a rudiment core rod in a machining mode;
step three: performing solution treatment on the rudiment core rod, namely performing heat treatment on the core rod, heating the rudiment core rod to 1020-1100 ℃, preserving heat for 20-40 min, and then cooling to room temperature;
step four: aging the core rod finished in the third step again, namely, secondarily heating the core rod to 750-850 ℃, preserving heat for 3-5 h, discharging from a furnace, and air-cooling to room temperature;
step five: and (3) carrying out finish machining and polishing treatment on the rudiment core rod after the heat treatment to obtain a finished core rod meeting the requirements of dimensional accuracy and surface roughness.
The invention also discloses an application of the core rod for warm rolling the titanium alloy pipe, referring to FIG. 3, the produced finished core rod material is applied between the rollers of the cold rolling mill, the titanium alloy pipe blank passes through the core rod, and after being heated by the pipe blank heating system, passes through the core rod, and according to the working requirement, the titanium alloy pipe is rolled by the rollers at 700-980 ℃ with the temperature, referring to FIG. 2, the X axis is the heat preservation time, the Y axis is the hardness of the core rod after heat treatment, and the heat preservation time is 3-5 h after 750-850 ℃, and the hardness position of the core rod is between 370-400Hv, so that the titanium alloy pipe blank still has high hardness, high wear resistance and high heat resistance after being continuously used under different core rods and the temperature condition.
In summary, the high-temperature alloy material (ZSG) is selected as the raw material of the titanium alloy tube rolling tool and die, so that the high-temperature alloy tube rolling tool and die has good strength, hardness, stability and heat resistance at 700-980 ℃ and ensures the dimensional stability and precision of the processed product; the heat treatment process for processing the high-temperature alloy core rod adopts 1020-1100 ℃ heat preservation for 20-40 min solid solution (water cooling), 750-850 ℃ aging heat preservation for 3-5 h discharging air cooling, improves the hardness and the service life of a tool and a die, thereby greatly saving the consumption of the rolling tool and the die, reducing the production cost of products, and improving the dimensional stability and the precision of the products.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (5)
1. A method for manufacturing a mandrel for warm rolling a titanium alloy tube, which is characterized in that: the method comprises the following steps:
step one: selecting a high-temperature alloy material as a raw material for producing the core rod;
step two: machining the high-temperature alloy raw material into a rudiment core rod in a machining mode;
step three: performing solution treatment on the rudiment core rod, namely performing heat treatment on the core rod, heating the rudiment core rod to high temperature, and then performing water cooling to room temperature;
step four: aging the core rod finished in the third step again, namely, carrying out secondary heating on the core rod, discharging from a furnace, and air-cooling to room temperature;
step five: and (3) carrying out finish machining and polishing treatment on the rudiment core rod after the heat treatment to obtain a finished core rod meeting the requirements of dimensional accuracy and surface roughness.
2. The method for manufacturing a mandrel for hot rolling a titanium alloy tube according to claim 1, wherein: the high-temperature alloy raw material in the first step comprises the following components in percentage by mass: less than or equal to 0.08 percent of C, 17.00 to 20.00 percent of Cr, 5.00 to 8.00 percent of Co, 5.00 to 7.00 percent of W, 3.50 to 4.50 percent of Mo, 1.70 to 2.40 percent of Al, 1.00 to 1.50 percent of Ti, less than or equal to 2.00 percent of Fe, less than or equal to 0.010 percent of Mg, less than or equal to 0.005 percent of B, less than or equal to 0.020 percent of Ce, less than or equal to 0.50 percent of Si, less than or equal to 0.40 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, and the balance of Ni.
3. The method for manufacturing a mandrel for hot rolling a titanium alloy tube according to claim 2, wherein: in the third step, the core rod is heated to 1020-1100 ℃ and then is kept for 20-40 min.
4. The method for manufacturing a mandrel for hot rolling a titanium alloy tube according to claim 3, wherein: in the fourth step, the core rod is heated to 750-850 ℃ for the second time and then is kept for 3-5 hours.
5. Use of a mandrel for warm rolling titanium alloy tubes according to any one of claims 1 to 4, characterized in that: and (3) rolling the core rod material produced in the step (V) at the temperature of 700-980 ℃ according to the requirements of working conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311466990.3A CN117600772A (en) | 2023-11-06 | 2023-11-06 | Manufacturing method and application of core rod for warm-rolled titanium alloy tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311466990.3A CN117600772A (en) | 2023-11-06 | 2023-11-06 | Manufacturing method and application of core rod for warm-rolled titanium alloy tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117600772A true CN117600772A (en) | 2024-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311466990.3A Pending CN117600772A (en) | 2023-11-06 | 2023-11-06 | Manufacturing method and application of core rod for warm-rolled titanium alloy tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117600772A (en) |
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2023
- 2023-11-06 CN CN202311466990.3A patent/CN117600772A/en active Pending
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