CN110777240A - Spheroidizing annealing process method for CrNiMoV high alloy steel - Google Patents
Spheroidizing annealing process method for CrNiMoV high alloy steel Download PDFInfo
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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
- C21D1/32—Soft annealing, e.g. spheroidising
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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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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
- C21D2211/004—Dispersions; Precipitations
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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
- C21D2211/005—Ferrite
Abstract
The invention discloses a spheroidizing annealing process method of CrNiMoV high alloy steel, which comprises the following steps: 1) heating the CrNiMoV high alloy steel to 580 +/-20 ℃, and controlling the heating time to be 4 +/-0.2 h; then preserving the heat for 30 plus or minus 5min at 580 plus or minus 20 ℃; 2) heating the CrNiMoV high alloy steel after heat preservation to 780 +/-20 ℃, and controlling the heating time to be 5.5 +/-0.2 h; then preserving the heat for 1.5 plus or minus 0.2h at 780 plus or minus 20 ℃; 3) cooling the CrNiMoV high alloy steel after heat preservation again from 780 +/-20 ℃ to 720 +/-20 ℃, and controlling the cooling time to be 3 +/-0.2 h; then preserving the heat for 5 plus or minus 0.2h at the temperature of 720 plus or minus 10 ℃; 4) cooling the CrNiMoV high alloy steel after the temperature reduction and preservation is finished from 720 +/-20 ℃ to 520 +/-10 ℃, and controlling the cooling speed to be less than or equal to 30 ℃/h; then air cooling to below 130 ℃ to finish spheroidizing annealing. After spheroidizing annealing treatment is carried out on CrNiMoV high alloy steel by using the technical scheme disclosed by the application, the obtained CrNiMoV high alloy steel has uniform metallographic structure, the internal spheroidization rate of the alloy reaches more than 98%, and the HV hardness difference is less than or equal to 6 HV.
Description
Technical Field
The invention belongs to the technical field of heat treatment of metal materials, and particularly relates to a spheroidizing annealing process method of CrNiMoV high alloy steel.
Background
The metal heat treatment is a process of heating a metal workpiece in a certain medium to a proper temperature, keeping the temperature for a certain time, cooling the metal workpiece in different media at different speeds, and controlling the performance of the metal workpiece by changing the microstructure of the surface or the interior of the metal material.
The CrNiMoV series steel belongs to high alloy steel, and contains a large amount of Cr, Mo, V and other elements, so that net-shaped carbide and white spots are easily formed, and before tempering, spheroidizing annealing is adopted to obtain a good pretreated structure and reduce the sensitivity of the white spots.
The main purpose of the spheroidizing annealing process is to obtain a pseudo eutectoid structure, namely, uniform and fine spherical carbides are distributed on a ferrite matrix. Uniform and fine carbide distribution, and is beneficial to subsequent quenching. The traditional spheroidizing process has the advantages of high heat preservation temperature, long time, great energy waste, and easy occurrence of quality problems of nonuniform tissue, low spheroidization rate, nonuniform hardness and the like in the annealing process.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a spheroidizing annealing process method of CrNiMoV high alloy steel with uniform metallographic structure, more than 98 percent of alloy internal spheroidizing rate and less than or equal to 6HV hardness difference inside the alloy.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a spheroidizing annealing process method of CrNiMoV high alloy steel comprises the following steps:
1) heating the CrNiMoV high alloy steel to 580 +/-20 ℃, and controlling the heating time to be 4 +/-0.2 h; then preserving the heat for 30 plus or minus 5min at 580 plus or minus 20 ℃;
2) heating the CrNiMoV high alloy steel after heat preservation to 780 +/-20 ℃, and controlling the heating time to be 5.5 +/-0.2 h; then preserving the heat for 1.5 plus or minus 0.2h at 780 plus or minus 20 ℃;
3) cooling the CrNiMoV high alloy steel after heat preservation again from 780 +/-20 ℃ to 720 +/-20 ℃, and controlling the cooling time to be 3 +/-0.2 h; then preserving the heat for 5 plus or minus 0.2h at the temperature of 720 plus or minus 10 ℃;
4) reducing the temperature of the CrNiMoV high alloy steel after the heat preservation in the step 3) from 720 +/-20 ℃ to 520 +/-10 ℃, and controlling the cooling speed to be less than or equal to 30 ℃/h; then air-cooling to below 130 ℃ to finish spheroidizing annealing;
the CrNiMoV high alloy steel comprises the following components in percentage by mass: 0.35-0.60%, Si: 0.30 to 0.50%, Mn: 0.75-0.95%, S is less than or equal to 0.008%, P is less than or equal to 0.014%, Cr: 0.90-1.10%, Ni: 0.45-1.1%, Mo: 0.90-1.10%, V: 0.13-0.25%, and the balance Fe.
The spheroidizing annealing process method of the CrNiMoV high alloy steel is further preferable, and comprises the following steps:
1) heating the CrNiMoV high alloy steel to 580 +/-2 ℃, and controlling the heating time to be 4 h; then preserving the heat for 30min at 580 +/-2 ℃;
2) heating the CrNiMoV high alloy steel after heat preservation to 780 +/-2 ℃, and controlling the heating time to be 5.5 h; then preserving the heat for 1.5h at 780 +/-2 ℃;
3) cooling the CrNiMoV high alloy steel after heat preservation again from 780 +/-2 ℃ to 720 +/-2 ℃, and controlling the cooling time to be 3 +/-0.1 h; then preserving the heat for 5 hours at the temperature of 720 +/-10 ℃;
4) reducing the temperature of the CrNiMoV high alloy steel after the heat preservation in the step 3) from 720 +/-2 ℃ to 520 +/-2 ℃, and controlling the cooling speed to be less than or equal to 30 ℃/h; then air cooling to below 130 ℃ to finish spheroidizing annealing.
In the step 4), the temperature is reduced from 720 +/-2 ℃ to 520 +/-2 ℃, and the cooling speed is controlled to be 20 +/-2 ℃/h.
Has the advantages that: after spheroidizing annealing treatment is carried out on CrNiMoV high alloy steel by using the technical scheme disclosed by the application, the obtained CrNiMoV high alloy steel has finer and more uniform crystal grains, uniform metallographic structure, more than 98% of internal spheroidization rate of the alloy and less than or equal to 6HV hardness difference inside the alloy.
The microstructure of the CrNiMoV high alloy steel after spheroidizing annealing is ferrite and granular carbide which is dispersed and distributed, the granular carbide is a spheroidizing structure, the grade is 5-6, the microhardness is 174-180 HV, and the tensile strength in a tensile test is 552-576 MPa. The good spheroidized annealed structure is beneficial to cold cutting and cold deformation processing, and is not easy to generate phenomena of deformation cracking and the like. Is more beneficial to having important decisive influence on the homogenization of the final quenching structure, the quenching hardness stability and the good toughness after tempering.
Drawings
FIG. 1 is a metallographic phase diagram (magnification:. times.500) showing the microstructure of a CrNiMoV-based high alloy steel before spheroidizing annealing in example 1 of the present invention.
FIG. 2 is a metallographic photograph (magnification:. times.500) of a spheroidized structure of a CrNiMoV-based high alloy steel after spheroidizing annealing in example 1 of the present invention.
FIG. 3 is a structural metallographic image (magnification ×. 500) of a CrNiMoV-based high alloy steel before spheroidizing annealing in example 2 of the present invention.
FIG. 4 is a metallographic photograph (magnification:. times.500) of a spheroidized structure of a CrNiMoV-based high alloy steel after spheroidizing annealing in example 2 of the present invention.
FIG. 5 is a structural metallographic image (magnification ×. 500) of a CrNiMoV-based high alloy steel before spheroidizing annealing in example 3 of the present invention.
FIG. 6 is a metallographic photograph (magnification:. times.500) of a spheroidized structure of a CrNiMoV-based high alloy steel after spheroidizing annealing in example 3 of the present invention.
Detailed Description
The equipment adopted for observing the metallographic picture of the spheroidized tissue in the embodiment of the invention is an Axio worker mager, M2m positive full-automatic material microscope (agency of Beijing Purui Seisajic Co., Ltd.) of Germany Zeiss company.
The national standard for measuring microhardness in the embodiment of the invention is G3/T4340.1-2009.
In the embodiment of the invention, a SANSCMT5000 electronic mechanical experiment machine is adopted for measuring mechanical stretching.
Example 1
The CrNiMoV high alloy steel comprises the following components in percentage by mass: 0.55%, Si: 0.35%, Mn: 0.8 percent, less than or equal to 0.006 percent of S, less than or equal to 0.012 percent of P, and the weight percentage of Cr: 0.82%, Ni: 1.53%, Mo: 0.28%, V: 0.094%, the balance being Fe.
The spheroidizing annealing process of CrNiMoV high alloy steel includes the following steps:
1) heating the CrNiMoV high alloy steel to 580 +/-1 ℃, and controlling the heating time to be 4 h; then preserving the heat for 30min at 580 +/-1 ℃;
2) heating the CrNiMoV high alloy steel after heat preservation to 780 +/-1 ℃, and controlling the heating time to be 5.5 h; then preserving the heat for 1.5h at 780 +/-1 ℃;
3) cooling the CrNiMoV high alloy steel after heat preservation again to 720 +/-1 ℃, and controlling the cooling time to be 3 +/-0.1 h; then preserving the heat for 5 hours at the temperature of 720 +/-2 ℃;
4) reducing the temperature of the CrNiMoV high alloy steel after the heat preservation in the step 3) from 720 +/-2 ℃ to 520 +/-2 ℃, and controlling the cooling speed to be 20 +/-2 ℃; then air cooling to below 130 ℃ to finish spheroidizing annealing.
The microstructure of the CrNiMoV high alloy steel after spheroidizing annealing is ferrite and granular carbide which is dispersed and distributed, the granular carbide is a spheroidizing structure, the grade is 5-6, the microhardness is 176.4-179.5 HV, and the tensile strength in a tensile test is 562-573 Mpa.
As can be seen from the tissue golden phase diagram (x 500) of fig. 1 and 2: the CrNiMoV high alloy steel has larger change before and after spheroidizing annealing, the crystal grains in the alloy are finer and more uniform after the spheroidizing annealing, and the spheroidizing rate in the alloy reaches more than 98 percent.
Example 2
The CrNiMoV high alloy steel comprises the following components in percentage by mass: 0.49%, Si: 0.40%, Mn: 0.80 percent, less than or equal to 0.006 percent of S, less than or equal to 0.012 percent of P, and the weight percentage of Cr: 0.98%, Ni: 0.85%, Mo: 1.05%, V: 0.19 percent and the balance of Fe.
The spheroidizing annealing process of CrNiMoV high alloy steel is further optimized, and comprises the following steps:
1) heating the CrNiMoV high alloy steel to 580 +/-2 ℃, and controlling the heating time to be 4 h; then preserving the heat for 30min at 580 +/-2 ℃;
2) heating the CrNiMoV high alloy steel after heat preservation to 780 +/-2 ℃, and controlling the heating time to be 5.5 h; then preserving the heat for 1.5h at 780 +/-2 ℃;
3) cooling the CrNiMoV high alloy steel after heat preservation again from 780 +/-2 ℃ to 720 +/-2 ℃, and controlling the cooling time to be 3 +/-0.1 h; then preserving the heat for 5 hours at the temperature of 720 +/-10 ℃;
4) reducing the temperature of the CrNiMoV high alloy steel after the heat preservation in the step 3) from 720 +/-2 ℃ to 520 +/-2 ℃, and controlling the cooling speed to be 20 +/-2 ℃/h; then air cooling to below 130 ℃ to finish spheroidizing annealing.
The microstructure of the CrNiMoV high-alloy steel after spheroidizing annealing is ferrite and granular carbide distributed in a dispersing way, the granular carbide is a spheroidizing structure, the grade is 5-6, the microhardness is 175.8-178.7 HV, and the tensile strength during a tensile test is 563-574 Mpa.
As can be seen from the tissue golden phase diagram (x 500) of fig. 3 and 4: the CrNiMoV high alloy steel has larger change before and after spheroidizing annealing, the crystal grains in the alloy are finer and more uniform after the spheroidizing annealing, and the spheroidizing rate in the alloy reaches more than 98 percent.
Example 3
The CrNiMoV high alloy steel comprises the following components in percentage by mass: 0.48%, Si: 0.42%, Mn: 0.85 percent, less than or equal to 0.007 percent of S, less than or equal to 0.013 percent of P, Cr: 0.98%, Ni: 0.89%, Mo: 0.97%, V: 0.22 percent and the balance of Fe.
The spheroidizing annealing process of CrNiMoV high alloy steel is further optimized, and comprises the following steps:
1) heating the CrNiMoV high alloy steel to 580 +/-5 ℃, and controlling the heating time to be 4 +/-0.1 h; then preserving the heat for 30 plus or minus 5min at 580 plus or minus 50 ℃;
2) heating the CrNiMoV high alloy steel after heat preservation to 780 +/-5 ℃, and controlling the heating time to be 5.5 +/-0.1 h; then preserving the heat for 1.5 plus or minus 0.1h at 780 plus or minus 5 ℃;
3) cooling the CrNiMoV high alloy steel after heat preservation again from 780 +/-5 ℃ to 720 +/-5 ℃, and controlling the cooling time to be 3 +/-0.1 h; then preserving the heat for 5 +/-0.1 h at the temperature of 720 +/-5 ℃;
4) reducing the temperature of the CrNiMoV high alloy steel after the heat preservation in the step 3) from 720 +/-5 ℃ to 520 +/-5 ℃, and controlling the cooling speed to be 20 +/-2 ℃/h; then air cooling to below 130 ℃ to finish spheroidizing annealing.
The microstructure of the CrNiMoV high alloy steel after spheroidizing annealing is ferrite and granular carbide which is dispersed and distributed, the granular carbide is a spheroidizing structure, the grade is 5-6, the microhardness is 175-180 HV, and the tensile strength in a tensile test is 559-571 Mpa.
As can be seen from the tissue golden phase diagram (x 500) of fig. 5 and 6: the CrNiMoV high alloy steel has larger change before and after spheroidizing annealing, the crystal grains in the alloy are finer and more uniform after the spheroidizing annealing, and the spheroidizing rate in the alloy reaches more than 98 percent.
Claims (4)
1. A spheroidizing annealing process method of CrNiMoV high alloy steel comprises the following steps:
1) heating the CrNiMoV high alloy steel to 580 +/-20 ℃, and controlling the heating time to be 4 +/-0.2 h; then preserving the heat for 30 plus or minus 5min at 580 plus or minus 20 ℃;
2) heating the CrNiMoV high alloy steel after heat preservation to 780 +/-20 ℃, and controlling the heating time to be 5.5 +/-0.2 h; then preserving the heat for 1.5 plus or minus 0.2h at 780 plus or minus 20 ℃;
3) cooling the CrNiMoV high alloy steel after heat preservation again from 780 +/-20 ℃ to 720 +/-20 ℃, and controlling the cooling time to be 3 +/-0.2 h; then preserving the heat for 5 plus or minus 0.2h at the temperature of 720 plus or minus 10 ℃;
4) reducing the temperature of the CrNiMoV high alloy steel after the heat preservation in the step 3) from 720 +/-20 ℃ to 520 +/-10 ℃, and controlling the cooling speed to be less than or equal to 30 ℃/h; then air-cooling to below 130 ℃ to finish spheroidizing annealing;
the CrNiMoV high alloy steel comprises the following components in percentage by mass: 0.35-0.60%, Si: 0.30 to 0.50%, Mn: 0.75-0.90%, S is less than or equal to 0.008%, P is less than or equal to 0.014%, Cr: 0.90-1.10%, Ni: 0.45-0.85%, Mo: 0.85-1.05%, V: 0.15-0.25%, and the balance Fe.
2. The spheroidizing annealing process method of CrNiMoV series high alloy steel according to claim 1, characterized by comprising the steps of:
1) heating the CrNiMoV high alloy steel to 580 +/-2 ℃, and controlling the heating time to be 4 h; then preserving the heat for 30min at 580 +/-2 ℃;
2) heating the CrNiMoV high alloy steel after heat preservation to 780 +/-2 ℃, and controlling the heating time to be 5.5 h; then preserving the heat for 1.5h at 780 +/-2 ℃;
3) cooling the CrNiMoV high alloy steel after heat preservation again from 780 +/-2 ℃ to 720 +/-2 ℃, and controlling the cooling time to be 3 +/-0.1 h; then preserving the heat for 5 hours at the temperature of 720 +/-10 ℃;
4) reducing the temperature of the CrNiMoV high alloy steel after the heat preservation in the step 3) from 720 +/-2 ℃ to 520 +/-2 ℃, and controlling the cooling speed to be less than or equal to 30 ℃/h; then air cooling to below 130 ℃ to finish spheroidizing annealing.
3. The spheroidizing annealing process method of CrNiMoV series high alloy steel according to claim 1 or 2, characterized in that: in the step 4), the temperature is reduced from 720 +/-2 ℃ to 520 +/-2 ℃, and the cooling speed is controlled to be 20 +/-2 ℃/h.
4. The spheroidizing annealing process method of CrNiMoV series high alloy steel according to claim 1 or 2, characterized in that: the CrNiMoV high alloy steel treated by the spheroidizing annealing process has the internal spheroidizing rate of over 98 percent, the microhardness of 174-180 HV and the tensile strength of 552-576 MPa in a tensile test.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111876564A (en) * | 2020-07-14 | 2020-11-03 | 昆山正通铭金属有限公司 | Spheroidizing annealing process of hexagonal alloy tool steel S2 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0523375A2 (en) * | 1991-06-14 | 1993-01-20 | Nippon Steel Corporation | Process for producing steel bar wire rod for cold working |
| CN102433502A (en) * | 2011-12-23 | 2012-05-02 | 中冶南方(武汉)威仕工业炉有限公司 | Spheroidized annealing technology for GCr15 bearing steel |
| CN103276297A (en) * | 2013-06-09 | 2013-09-04 | 嘉兴市新纪元钢管制造有限公司 | Self-connecting type and high-strength seamless steel tube for rope coring drill rod, as well as manufacturing method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0523375A2 (en) * | 1991-06-14 | 1993-01-20 | Nippon Steel Corporation | Process for producing steel bar wire rod for cold working |
| CN102433502A (en) * | 2011-12-23 | 2012-05-02 | 中冶南方(武汉)威仕工业炉有限公司 | Spheroidized annealing technology for GCr15 bearing steel |
| CN103276297A (en) * | 2013-06-09 | 2013-09-04 | 嘉兴市新纪元钢管制造有限公司 | Self-connecting type and high-strength seamless steel tube for rope coring drill rod, as well as manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111876564A (en) * | 2020-07-14 | 2020-11-03 | 昆山正通铭金属有限公司 | Spheroidizing annealing process of hexagonal alloy tool steel S2 |
| CN111876564B (en) * | 2020-07-14 | 2022-03-04 | 昆山正通铭金属有限公司 | Spheroidizing annealing process of hexagonal alloy tool steel S2 |
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