CN110144441B - Heat treatment method of 0Cr13Ni5Mo stainless steel - Google Patents
Heat treatment method of 0Cr13Ni5Mo stainless steel Download PDFInfo
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- CN110144441B CN110144441B CN201910456528.2A CN201910456528A CN110144441B CN 110144441 B CN110144441 B CN 110144441B CN 201910456528 A CN201910456528 A CN 201910456528A CN 110144441 B CN110144441 B CN 110144441B
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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
- C21D1/26—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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
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Abstract
The invention discloses a heat treatment method of 0Cr13Ni5Mo stainless steel, which comprises the steps of carrying out pretreatment, solution treatment, aging treatment, annealing treatment, secondary solution treatment and tempering treatment on 0Cr13Ni5Mo stainless steel to obtain 0Cr13Ni5Mo stainless steel with high strength and high toughness, wherein the 0Cr13Ni5Mo stainless steel treated by the heat treatment method has high strength and high toughness, the service life of a workpiece is long, and the requirements of different working conditions can be met.
Description
Technical Field
The invention belongs to the technical field of alloy stainless steel heat treatment, and relates to a heat treatment method of 0Cr13Ni5Mo stainless steel.
Background
0Cr13Ni5Mo was a steel grade developed in the 60 th 20 th century, was a low-carbon martensitic stainless steel containing molybdenum, contained 5% nickel and had a relatively low carbon content, a relatively high corrosion resistance, and the steel having the best corrosion resistance among Cr13 type stainless steels, and had excellent formability and weldability. When the 0Cr13Ni5Mo stainless steel is applied to the fields of hydropower, thermal power, nuclear power and the like, the stainless steel is mainly used for manufacturing fan impellers, the connection of fan impeller parts needs to be carried out through a welding process, the working condition is complex, and the 0Cr13Ni5Mo stainless steel is required to have high strength and good toughness, so that higher requirements are provided for the heat treatment process of the 0Cr13Ni5Mo stainless steel.
Disclosure of Invention
The invention aims to provide a heat treatment method of 0Cr13Ni5Mo stainless steel, which solves the problem that the strength and toughness of 0Cr13Ni5Mo stainless steel in the prior art are insufficient.
The technical scheme adopted by the invention is that the heat treatment method of the 0Cr13Ni5Mo stainless steel is implemented according to the following steps:
step 1, checking and preprocessing a workpiece;
step 2, solution treatment: placing the pretreated workpiece into a heat treatment device, heating to 1020-;
step 3, aging treatment: placing the workpiece treated in the step 2 in a heat treatment device, heating to 560 ℃ and 600 ℃, and preserving heat for 1.5-2.5 h;
step 4, annealing treatment: heating the workpiece treated in the step 3 to 850-;
step 5, secondary solid solution: heating the workpiece treated in the step 4 to 980-;
step 6, tempering: heating the workpiece treated in the step 5 to 640-700 ℃, preserving the heat for 1.5-2.5h, and then placing the workpiece in air to cool the workpiece to the room temperature.
The invention is also characterized in that:
the pretreatment in the step 1 is to clean the workpiece with acetone to remove oil stains.
And 5, cooling specifically in an oil cooling mode, and cleaning the workpiece by using acetone after cooling in the oil cooling mode.
The heating rate in all steps was 25 deg.C/min.
The heating temperature in step 4 was 860 ℃.
The invention has the beneficial effects that: according to the heat treatment method of the 0Cr13Ni5Mo stainless steel, the 0Cr13Ni5Mo stainless steel with more uniform structure is obtained by performing pretreatment, solution treatment, aging treatment, annealing treatment, secondary solution treatment and tempering treatment on the workpiece, so that the mechanical property of the workpiece is improved, and the workpiece has high strength and good toughness.
Drawings
FIG. 1 is a microstructure of a 0Cr13Ni5Mo stainless steel treated by a heat treatment method of the present invention for 0Cr13Ni5Mo stainless steel;
FIG. 2 is a microstructure of 0Cr13Ni5Mo stainless steel treated by a conventional heat treatment method.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The heat treatment method of the 0Cr13Ni5Mo stainless steel is specifically implemented according to the following steps:
step 1, checking and preprocessing a workpiece, checking whether the surface of the workpiece has obvious defects such as holes or cracks, and cleaning the surface of the workpiece by using acetone to remove oil stains on the surface;
step 2, solution treatment: putting the pretreated workpiece into a heat treatment device, heating to 1020-1050 ℃ at a uniform speed at a heating rate of 25 ℃/min, preserving heat for 1.5-2.5h, and then putting the workpiece in air to cool to room temperature;
step 3, aging treatment: placing the workpiece treated in the step 2 in a heat treatment device, heating to 560 ℃ and 600 ℃ at a uniform speed at a heating rate of 25 ℃/min, and preserving heat for 1.5-2.5 h;
step 4, annealing treatment: heating the workpiece processed in the step 3 to 860 ℃ at a uniform speed at a heating rate of 25 ℃/min, preserving heat for 1.5-2.5h, and then placing in air to cool to room temperature;
step 5, secondary solid solution: heating the workpiece processed in the step 4 to 980-;
step 6, tempering: heating the workpiece processed in the step 5 to 640-700 ℃ at a uniform heating rate of 25 ℃/min, preserving the heat for 1.5-2.5h, and then placing the workpiece in air to cool the workpiece to room temperature.
In the heat treatment method of the 0Cr13Ni5Mo stainless steel of the invention:
the step 1 is used for preventing obvious defects of the workpiece from influencing the mechanical property of the final workpiece;
the step 2 has the function of fully dissolving the gamma phase and the carbide in the matrix to obtain a uniform supersaturated solid solution;
the step 3 has the effects that Cr carbide can be completely dissolved, intergranular corrosion is not easy to occur, and a gamma strengthening phase with fine particles and uniform distribution is precipitated;
the purpose of the annealing treatment at 860 ℃ in the step 4 is to eliminate redundant stress, because Mo element added in the 0Cr13Ni5Mo stainless steel is a strong carbide forming element, the secondary hardening caused by the annealing treatment is very obvious, the carbide can be precipitated to the maximum extent after the heat preservation is carried out for 1.5 to 2.5 hours, and the strength of the 0Cr13Ni5Mo stainless steel is greatly improved.
Cementite in the tempered martensite generated after the tempering treatment in the step 5 is granular, the granular cementite is favorable for preventing the crack from expanding in the fracture process, the structure is more uniform, and the toughness of the 0Cr13Ni5Mo stainless steel is improved.
All heating processes are carried out in an STM series box type resistance furnace, the temperature rising speed is controlled to be less than 25 ℃/min, the temperature rising speed is always raised at a constant speed, and the phenomenon that the workpiece is cracked due to stress superposition caused by temperature difference between the center of the workpiece and the outside due to uneven temperature rising speed or too high temperature rising is prevented.
TABLE 1 comparison of mechanical properties of 0Cr13Ni5Mo stainless steel treated by the conventional heat treatment method and the heat treatment method of the present invention
| 0Cr13Ni5Mo | Yield strength | Tensile strength | Elongation after fracture | Reduction of area |
| Existing heat treatment method | 620MPa | 795MPa | 15％ | 46％ |
| The heat treatment method of the present invention | 740.5MPA | 947.84MPA | 17％ | 59％ |
Table 1 shows the comparison data of the mechanical properties of 0Cr13Ni5Mo stainless steel treated by the heat treatment method of the present invention and the prior art, and it can be seen from Table 1 that the yield strength, tensile strength, elongation after fracture and reduction of area of 0Cr13Ni5Mo stainless steel treated by the heat treatment method of 0Cr13Ni5Mo stainless steel of the present invention are improved to different degrees.
As can be seen by comparing fig. 1 and 2: the structure of the 0Cr13Ni5Mo stainless steel processed by the existing heat treatment method and the heat treatment method of the 0Cr13Ni5Mo stainless steel is lath-shaped tempered martensite, inverted austenite and granular carbide, but the lath-shaped structure of the 0Cr13Ni5Mo stainless steel processed by the heat treatment method of the invention is more dense, compact and uniform, so that the strength is higher and the toughness is better.
In conclusion, the heat treatment method of the 0Cr13Ni5Mo stainless steel enhances the strength and the toughness of the 0Cr13Ni5Mo stainless steel, prolongs the service life of a workpiece, and can meet the requirements of different working conditions.
Example 1
The heat treatment method of the 0Cr13Ni5Mo stainless steel is specifically implemented according to the following steps:
step 1, checking and preprocessing a workpiece, checking whether the surface of the workpiece has obvious defects such as holes or cracks, and cleaning the surface of the workpiece by using acetone to remove oil stains on the surface;
step 2, solution treatment: putting the pretreated workpiece into a heat treatment device, uniformly heating to 1020 ℃ at a heating rate of 25 ℃/min, preserving heat for 1.5h, and then placing in air to cool to room temperature;
step 3, aging treatment: placing the workpiece treated in the step 2 in a heat treatment device, heating to 560 ℃ at a uniform speed at a heating rate of 25 ℃/min, and preserving heat for 1.5 h;
step 4, annealing treatment: heating the workpiece processed in the step 3 to 860 ℃ at a uniform speed at a heating rate of 25 ℃/min, preserving heat for 1.5h, and then placing in air to cool to room temperature;
step 5, secondary solid solution: heating the workpiece treated in the step 4 to 980 ℃ at a uniform speed at a heating rate of 25 ℃/min, preserving heat for 1h, cooling to room temperature in an oil cooling mode, and cleaning the workpiece with acetone;
step 6, tempering: and (4) uniformly heating the workpiece treated in the step (5) to 640 ℃ at a heating rate of 25 ℃/min, preserving heat for 1.5h, and then placing in air to cool to room temperature.
Example 2
The heat treatment method of the 0Cr13Ni5Mo stainless steel is specifically implemented according to the following steps:
step 1, checking and preprocessing a workpiece, checking whether the surface of the workpiece has obvious defects such as holes or cracks, and cleaning the surface of the workpiece by using acetone to remove oil stains on the surface;
step 2, solution treatment: putting the pretreated workpiece into a heat treatment device, uniformly heating to 1030 ℃ at a heating rate of 25 ℃/min, preserving heat for 1.5h, and then placing in air to cool to room temperature;
step 3, aging treatment: placing the workpiece treated in the step 2 in a heat treatment device, heating to 570 ℃ at a uniform speed at a heating rate of 25 ℃/min, and preserving heat for 1.5 h;
step 4, annealing treatment: heating the workpiece processed in the step 3 to 860 ℃ at a uniform speed at a heating rate of 25 ℃/min, preserving heat for 1.5h, and then placing in air to cool to room temperature;
step 5, secondary solid solution: heating the workpiece processed in the step 4 to 1000 ℃ at a uniform speed at a heating rate of 25 ℃/min, preserving heat for 1h, cooling to room temperature in an oil cooling mode, and cleaning the workpiece with acetone;
step 6, tempering: and (4) uniformly heating the workpiece treated in the step (5) to 660 ℃ at a speed of 25 ℃/min, preserving heat for 1.5h, and then placing in air to cool to room temperature.
Example 3
The heat treatment method of the 0Cr13Ni5Mo stainless steel is specifically implemented according to the following steps:
step 1, checking and preprocessing a workpiece, checking whether the surface of the workpiece has obvious defects such as holes or cracks, and cleaning the surface of the workpiece by using acetone to remove oil stains on the surface;
step 2, solution treatment: putting the pretreated workpiece into a heat treatment device, uniformly heating to 1040 ℃ at a heating rate of 25 ℃/min, preserving heat for 2h, and then putting the workpiece into air to cool to room temperature;
step 3, aging treatment: placing the workpiece treated in the step 2 in a heat treatment device, heating to 580 ℃ at a uniform speed at a heating rate of 25 ℃/min, and preserving heat for 2 hours;
step 4, annealing treatment: heating the workpiece processed in the step 3 to 860 ℃ at a uniform speed at a heating rate of 25 ℃/min, preserving heat for 2h, and then placing in air to cool to room temperature;
step 5, secondary solid solution: uniformly heating the workpiece treated in the step 4 to 1040 ℃ at a heating rate of 25 ℃/min, preserving heat for 1.5h, cooling to room temperature in an oil cooling mode, and cleaning the workpiece with acetone;
step 6, tempering: and (4) uniformly heating the workpiece treated in the step (5) to 660 ℃ at a speed of 25 ℃/min, preserving heat for 2h, and then placing in air to cool to room temperature.
Example 4
The heat treatment method of the 0Cr13Ni5Mo stainless steel is specifically implemented according to the following steps:
step 1, checking and preprocessing a workpiece, checking whether the surface of the workpiece has obvious defects such as holes or cracks, and cleaning the surface of the workpiece by using acetone to remove oil stains on the surface;
step 2, solution treatment: putting the pretreated workpiece into a heat treatment device, uniformly heating to 1040 ℃ at a heating rate of 25 ℃/min, preserving heat for 2.5h, and then placing in air to cool to room temperature;
step 3, aging treatment: placing the workpiece treated in the step 2 in a heat treatment device, heating to 590 ℃ at a uniform speed at a heating rate of 25 ℃/min, and preserving heat for 2.5 hours;
step 4, annealing treatment: heating the workpiece processed in the step 3 to 860 ℃ at a uniform speed at a heating rate of 25 ℃/min, preserving heat for 2.5 hours, and then placing in air to cool to room temperature;
step 5, secondary solid solution: heating the workpiece processed in the step 4 to 1060 ℃ at a speed of 25 ℃/min at a uniform speed, preserving heat for 1.5h, cooling to room temperature in an oil cooling mode, and cleaning the workpiece with acetone;
step 6, tempering: and (4) uniformly heating the workpiece treated in the step (5) to 680 ℃ at a speed of 25 ℃/min, preserving heat for 2.5h, and then placing in air to cool to room temperature.
Example 5
The heat treatment method of the 0Cr13Ni5Mo stainless steel is specifically implemented according to the following steps:
step 1, checking and preprocessing a workpiece, checking whether the surface of the workpiece has obvious defects such as holes or cracks, and cleaning the surface of the workpiece by using acetone to remove oil stains on the surface;
step 2, solution treatment: putting the pretreated workpiece into a heat treatment device, uniformly heating to 1050 ℃ at a heating rate of 25 ℃/min, preserving heat for 2.5h, and then placing in air to cool to room temperature;
step 3, aging treatment: placing the workpiece treated in the step 2 in a heat treatment device, heating to 600 ℃ at a uniform speed at a heating rate of 25 ℃/min, and preserving heat for 2.5 hours;
step 4, annealing treatment: heating the workpiece processed in the step 3 to 860 ℃ at a uniform speed at a heating rate of 25 ℃/min, preserving heat for 2.5 hours, and then placing in air to cool to room temperature;
step 5, secondary solid solution: uniformly heating the workpiece treated in the step 4 to 1080 ℃ at a heating rate of 25 ℃/min, preserving heat for 1.5h, cooling to room temperature in an oil cooling mode, and cleaning the workpiece with acetone;
step 6, tempering: and (4) uniformly heating the workpiece treated in the step (5) to 700 ℃ at a speed of 25 ℃/min, preserving heat for 2.5h, and then placing in air to cool to room temperature.
Claims (3)
- The heat treatment method of the 1.0Cr13Ni5Mo stainless steel is characterized by comprising the following steps:step 1, checking and preprocessing a workpiece;step 2, solution treatment: placing the pretreated workpiece into a heat treatment device, heating to 1020-;step 3, aging treatment: placing the workpiece treated in the step 2 in a heat treatment device, heating to 560 ℃ and 600 ℃, and preserving heat for 1.5-2.5 h;step 4, annealing treatment: heating the workpiece treated in the step 3 to 860 ℃, preserving heat for 1.5-2.5h, and then placing in air to cool to room temperature;step 5, secondary solid solution: heating the workpiece treated in the step 4 to 980-;step 6, tempering: heating the workpiece treated in the step 5 to 640-680 ℃, preserving heat for 1.5-2.5h, and then placing in air to cool to room temperature;the pretreatment in the step 1 is to clean the workpiece with acetone to remove oil stains;the cooling in the step 5 is specifically cooling in an oil cooling mode.
- 2. The method for heat-treating 0Cr13Ni5Mo stainless steel according to claim 1, wherein after the cooling in the oil cooling mode, the workpiece is cleaned with acetone.
- 3. The method for heat treating 0Cr13Ni5Mo stainless steel according to claim 1, wherein the heating rate in all steps is 25 ℃/min.
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Citations (3)
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| CN103014551A (en) * | 2011-09-22 | 2013-04-03 | 兴化市新迅达不锈钢标准件有限公司 | Novel high-temperature alloy heat-resistant stainless steel bolt and production process thereof |
| CN104372276A (en) * | 2014-11-04 | 2015-02-25 | 哈尔滨汽轮机厂有限责任公司 | Method for improving high-temperature properties of GH4698 alloy |
| WO2018103090A1 (en) * | 2016-12-09 | 2018-06-14 | 张康 | High-nitrogen stainless bearing steel heat treatment process |
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| EP1373590B1 (en) * | 2001-03-27 | 2005-01-12 | Crs Holdings, Inc. | Ultra-high-strength precipitation-hardenable stainless steel and elongated strip made therefrom |
| CN102251084B (en) * | 2011-07-04 | 2013-04-17 | 南京迪威尔高端制造股份有限公司 | Heat treatment process of steel forging for hydraulic cylinder of deep-sea oil recovery equipment |
| CN103740913B (en) * | 2014-01-10 | 2015-11-25 | 隆英（上海）企业有限公司 | High temperature forging Martensite Stainless Steel heat treating method |
| CN106048158B (en) * | 2016-07-28 | 2018-10-19 | 北京动力机械研究所 | 0Cr17Ni4Cu4Nb stainless steel material heat treatment process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014551A (en) * | 2011-09-22 | 2013-04-03 | 兴化市新迅达不锈钢标准件有限公司 | Novel high-temperature alloy heat-resistant stainless steel bolt and production process thereof |
| CN104372276A (en) * | 2014-11-04 | 2015-02-25 | 哈尔滨汽轮机厂有限责任公司 | Method for improving high-temperature properties of GH4698 alloy |
| WO2018103090A1 (en) * | 2016-12-09 | 2018-06-14 | 张康 | High-nitrogen stainless bearing steel heat treatment process |
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Effective date of registration: 20211118 Address after: 710032 Room 101, unit 2, building 9, Qinshui new town, Changle East Road, Chanba Ecological District, Xi'an City, Shaanxi Province Patentee after: Shaanxi Wantong pipe fittings manufacturing Co.,Ltd. Address before: 710048 Shaanxi province Xi'an Beilin District Jinhua Road No. 5 Patentee before: XI'AN University OF TECHNOLOGY |