CN104694839A - 9Ni steel for steel structure construction and heating processing technology thereof - Google Patents
9Ni steel for steel structure construction and heating processing technology thereof Download PDFInfo
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Abstract
The invention discloses 9Ni steel for steel structure construction and a heating processing technology thereof. The heating processing technology of quenching-two-phase region subcritical quenching-tempering is adopted, the temperature of the quenching ranges from 930 DEG C to 950 DEG C, the temperature of the two-phase region subcritical quenching ranges from 720 DEG C to 740 DEG C, the temperature of the tempering ranges from 610 DEG C to 630 DEG C, a structure which takes the tempered sorbite as the principle thing is obtained, the quantity of the induced austenite inside the steel is increased through the reverse change of the martensite, the induced austenite is mainly distributed on the boundary of the lath martensite, and the distribution of the structure is more dispersed and evener. Meanwhile, the precipitation amount of the carbide is bigger, smaller and more dispersed. The steel strength of the 9Ni steel is lowered to a lower degree, meanwhile the low temperature impact toughness of the 9Ni steel can be greatly improved, and the mechanical property of the 9Ni steel can be optimized.
Description
Technical field
The present invention relates to a kind of steel building steel and heat treatment technics thereof, specifically a kind of 9Ni steel for steel building and thermal treatment process thereof.
Background technology
9Ni steel is first by the product research laboratory development success of International nickel Co. Ltd. Inco. Ltd. of the U.S., and alloying element Ni content, between 8.50-10.00wt%, is a kind of low-carbon (LC) quenched and tempered steel.9Ni steel, as the ferrite type steel uniquely can be on active service under-196 DEG C of cold condition, has higher yield strength and tensile strength, excellent low-temperature flexibility, good weldability.
9Ni steel must adopt suitable thermal treatment process, just can improve its low-temperature flexibility at-196 DEG C largely.Further investigation 9Ni Heat Treatment Of Steel technique, by Optimizing Process Parameters, finds out the relation of heat treatment process parameter and 9Ni steel low-temperature flexibility, has great significance to the application of 9Ni steel and development thereof.
For steel building, some key position needs to use 9Ni steel, thus 9Ni steel rate of utilization is increased significantly, by existing thermal treatment process, service requirements can be reached, but the mechanical property requirements of 9Ni steel, especially low-temperature impact toughness surplus capacity are little, the security that extreme influence 9Ni steel uses at low temperature.
Summary of the invention
Technical problem to be solved by this invention is: the low-temperature impact toughness for 9Ni steel in prior art is not enough, proposes a kind of 9Ni steel for steel building and thermal treatment process thereof, significantly improves 9Ni steel low-temperature impact toughness.
The technical scheme that the present invention solves above technical problem is:
A kind of 9Ni steel for steel building, its composition and mass percent are: C:0.31-0.33%, Ni:9.50-9.70%, Mn:0.45-0.47%, Si:0.07-0.09%, P:0.006-0.008%, S:0.002-0.005%, Nb:0.06-0.08%, V:0.07-0.09%, Ti:0.05-0.07%, Al:0.08-0.1%, N≤0.006%, H≤0.00020%, Cu:0.012-0.015%, Cr:0.4-0.6%, Mo:0.23-0.25%, surplus is Fe and inevitable impurity;
In this steel, first-phase is tempered sorbite, second-phase is reversed austenite, third phase is lath martensite, converes instruction is mainly distributed in lath martensite border, at thickness place, surface to 1/4, second-phase percent by volume is 4.5-4.8%, third phase percent by volume is 3.5-3.8%, and 1/4 thickness is 6.0-6.3% to center second-phase percent by volume, and third phase percent by volume is 4.5-4.8%.
For the 9Ni Heat Treatment Of Steel technique of steel building, adopt the thermal treatment process of quenching-two-phase region intercritical hardening-tempering, quenching temperature is 930-950 DEG C, carry out in normalizing furnace, the first refrigerating work procedure is adopted to be chilled to room temperature, make to organize complete austenitizing, impurity and second phase particles back dissolving, fining austenite grains; Two-phase region intercritical hardening temperature is 720-740 DEG C, carries out in normalizing furnace, adopts the second refrigerating work procedure to be chilled to room temperature, obtains tiny ferrite and martensitic stucture; Tempering temperature is 610-630 DEG C, carry out in tempering stove, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, obtain the tissue based on tempered sorbite, and the increasing number of reversed austenite in steel is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed; Meanwhile, make Carbide Precipitation amount comparatively large, and small and dispersed;
First refrigerating work procedure: first adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 15-17 DEG C/s, steel is cooled to 570-590 DEG C, adopt water-cooled, with the rate of cooling of 7-9 DEG C/s, steel is cooled to 420-450 DEG C again, then air cooling is to 350-370 DEG C, finally adopts water-cooled, with the rate of cooling of 4-6 DEG C/s, steel is cooled to room temperature;
Second refrigerating work procedure: first adopt water-cooled, with the rate of cooling of 7-9 DEG C/s, steel is cooled to 520-550 DEG C, then air cooling is to 450-470 DEG C, then adopts water-cooled, with the rate of cooling of 4-6 DEG C/s, steel is cooled to room temperature;
3rd refrigerating work procedure: first adopt the air-cooled rate of cooling with 2-4 DEG C/s that steel is cooled to 510-530 DEG C, adopt water-cooled, with the rate of cooling of 4-6 DEG C/s, steel is cooled to 370-390 DEG C again, finally adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 7-9 DEG C/s, steel is cooled to room temperature.
The invention has the beneficial effects as follows: the present invention is limited and thermal treatment process by composition, on the one hand, reversed austenite is separated out in flake at martensite lath intergranular, is evenly distributed; On the other hand, improve the thermostability of reversed austenite, thus make crystal boundary and matrix malleableize, 9Ni steel low-temperature impact toughness can be significantly improved, do not reduce or reduce intensity a little simultaneously.In a word, the present invention changes tissue morphology by thermal treatment process, reversed austenite is separated out in flake at martensite lath intergranular, and is evenly distributed, and then improve the thermostability of reversed austenite, thus make crystal boundary and matrix malleableize.
Embodiment
embodiment 1
The present embodiment is a kind of 9Ni steel for steel building, its composition and mass percent are: C:0.31%, Ni:9.50%, Mn:0.45%, Si:0.07%, P:0.006%, S:0.002%, Nb:0.06%, V:0.07%, Ti:0.05%, Al:0.08%, N:0.006%, H:0.00020%, Cu:0.012%, Cr:0.4%, Mo:0.23%, surplus is Fe and inevitable impurity.In this steel, first-phase is tempered sorbite, second-phase is reversed austenite, third phase is lath martensite, converes instruction is mainly distributed in lath martensite border, at thickness place, surface to 1/4, second-phase percent by volume is 4.5%, third phase percent by volume is 3.58%, 1/4 thickness is 6.0% to center second-phase percent by volume, and third phase percent by volume is 4.5%.
The 9Ni Heat Treatment Of Steel technique for steel building of the present embodiment, adopts the thermal treatment process of quenching-two-phase region intercritical hardening-tempering, wherein:
Quenching temperature is 930 DEG C, carries out in normalizing furnace, adopts the first refrigerating work procedure to be chilled to room temperature, makes to organize complete austenitizing, impurity and second phase particles back dissolving, fining austenite grains; First refrigerating work procedure: first adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 15 DEG C/s, steel is cooled to 570 DEG C, adopt water-cooled, with the rate of cooling of 7 DEG C/s, steel is cooled to 420 DEG C again, then air cooling to 350 DEG C, finally adopts water-cooled, with the rate of cooling of 4 DEG C/s, steel is cooled to room temperature;
Two-phase region intercritical hardening temperature is 720 DEG C, carries out in normalizing furnace, adopts the second refrigerating work procedure to be chilled to room temperature, obtains tiny ferrite and martensitic stucture; Second refrigerating work procedure: first adopt water-cooled with the rate of cooling of 7 DEG C/s, steel to be cooled to 520 DEG C, then air cooling to 450 DEG C, then adopt water-cooled, with the rate of cooling of 4 DEG C/s, steel is cooled to room temperature;
Tempering temperature is 610 DEG C, carry out in tempering stove, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, obtain the tissue based on tempered sorbite, and the increasing number of reversed austenite in steel is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed; Meanwhile, make Carbide Precipitation amount comparatively large, and small and dispersed; 3rd refrigerating work procedure: first adopt and air-cooledly with the rate of cooling of 2 DEG C/s, steel is chilled to 510 DEG C, then adopt water-cooled, with the rate of cooling of 4 DEG C/s, molten steel is chilled to 370 DEG C, finally adopts pressurized air or vaporific hardening liquid, with the rate of cooling of 7 DEG C/s, steel is chilled to room temperature.
The yield strength of the 9Ni steel manufactured by the present embodiment is 590-630MPa, tensile strength is 680-720MPa, unit elongation is 26.0-30.0%, ballistic work is 200-230J.
embodiment 2
The present embodiment is a kind of 9Ni steel for steel building, its composition and mass percent are: C:0.32%, Ni:9.60, Mn:0.46%, Si:0.08%, P:0.007%, S:0.003%, Nb:0.07%, V:0.08%, Ti:0.06%, Al:0.09%, N:0.002%, H:0.0001%, Cu:0.013%, Cr:0.5%, Mo:0.24%, surplus is Fe and inevitable impurity.In this steel, first-phase is tempered sorbite, second-phase is reversed austenite, third phase is lath martensite, converes instruction is mainly distributed in lath martensite border, at thickness place, surface to 1/4, second-phase percent by volume is 4.6%, third phase percent by volume is 3.7%, 1/4 thickness is 6.2% to center second-phase percent by volume, and third phase percent by volume is 4.6%.
The 9Ni Heat Treatment Of Steel technique for steel building of the present embodiment, adopts the thermal treatment process of quenching-two-phase region intercritical hardening-tempering, wherein:
Quenching temperature is 940 DEG C, carries out in normalizing furnace, adopts the first refrigerating work procedure to be chilled to room temperature, makes to organize complete austenitizing, impurity and second phase particles back dissolving, fining austenite grains; First refrigerating work procedure: first adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 16 DEG C/s, steel is cooled to 580 DEG C, adopt water-cooled, with the rate of cooling of 8 DEG C/s, steel is cooled to 430 DEG C again, then air cooling to 360 DEG C, finally adopts water-cooled, with the rate of cooling of 5 DEG C/s, steel is cooled to room temperature;
Two-phase region intercritical hardening temperature is 730 DEG C, carries out in normalizing furnace, adopts the second refrigerating work procedure to be chilled to room temperature, obtains tiny ferrite and martensitic stucture; Second refrigerating work procedure: first adopt water-cooled with the rate of cooling of 8 DEG C/s, steel to be cooled to 530 DEG C, then air cooling to 460 DEG C, then adopt water-cooled, with the rate of cooling of 5 DEG C/s, steel is cooled to room temperature;
Tempering temperature is 620 DEG C, carry out in tempering stove, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, obtain the tissue based on tempered sorbite, and the increasing number of reversed austenite in steel is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed; Meanwhile, make Carbide Precipitation amount comparatively large, and small and dispersed; 3rd refrigerating work procedure: first adopt and air-cooledly with the rate of cooling of 3 DEG C/s, steel is chilled to 520 DEG C, then adopt water-cooled, with the rate of cooling of 5 DEG C/s, molten steel is chilled to 380 DEG C, finally adopts pressurized air or vaporific hardening liquid, with the rate of cooling of 8 DEG C/s, steel is chilled to room temperature.
The yield strength of the 9Ni steel manufactured by the present embodiment is 670-710MPa, tensile strength is 700-740MPa, unit elongation is 21.0-25.0%, ballistic work is 180-210J.
embodiment 3
The present embodiment is a kind of 9Ni steel for steel building, its composition and mass percent are: C:0.33%, Ni:9.70%, Mn:0.47%, Si:0.09%, P:0.008%, S:0.005%, Nb:0.08%, V:0.09%, Ti:0.07%, Al:0.1%, N:0.002%, H:0.00012%, Cu:0.015%, Cr:0.6%, Mo:0.25%, surplus is Fe and inevitable impurity.In this steel, first-phase is tempered sorbite, second-phase is reversed austenite, third phase is lath martensite, converes instruction is mainly distributed in lath martensite border, at thickness place, surface to 1/4, second-phase percent by volume is 4.8%, third phase percent by volume is 3.8%, 1/4 thickness is 6.3% to center second-phase percent by volume, and third phase percent by volume is 4.8%.
The 9Ni Heat Treatment Of Steel technique for steel building of the present embodiment, adopts the thermal treatment process of quenching-two-phase region intercritical hardening-tempering, wherein:
Quenching temperature is 950 DEG C, carries out in normalizing furnace, adopts the first refrigerating work procedure to be chilled to room temperature, makes to organize complete austenitizing, impurity and second phase particles back dissolving, fining austenite grains; First refrigerating work procedure: first adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 17 DEG C/s, steel is cooled to 590 DEG C, adopt water-cooled, with the rate of cooling of 9 DEG C/s, steel is cooled to 450 DEG C again, then air cooling to 370 DEG C, finally adopts water-cooled, with the rate of cooling of 6 DEG C/s, steel is cooled to room temperature;
Two-phase region intercritical hardening temperature is 740 DEG C, carries out in normalizing furnace, adopts the second refrigerating work procedure to be chilled to room temperature, obtains tiny ferrite and martensitic stucture; Second refrigerating work procedure: first adopt water-cooled with the rate of cooling of 9 DEG C/s, steel to be cooled to 550 DEG C, then air cooling to 470 DEG C, then adopt water-cooled, with the rate of cooling of 6 DEG C/s, steel is cooled to room temperature;
Tempering temperature is 630 DEG C, carry out in tempering stove, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, obtain the tissue based on tempered sorbite, and the increasing number of reversed austenite in steel is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed; Meanwhile, make Carbide Precipitation amount comparatively large, and small and dispersed; 3rd refrigerating work procedure: first adopt and air-cooledly with the rate of cooling of 4 DEG C/s, steel is cooled to 530 DEG C, adopt water-cooled, with the rate of cooling of 6 DEG C/s, steel is cooled to 390 DEG C again, finally adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 9 DEG C/s, steel is cooled to room temperature.
The yield strength of the 9Ni steel manufactured by the present embodiment is 640-680MPa, tensile strength is 670-710MPa, unit elongation is 20.0-24.0%, ballistic work is 150-180J.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (8)
1. the 9Ni steel for steel building, it is characterized in that: its composition and mass percent are: C:0.31-0.33%, Ni:9.50-9.70%, Mn:0.45-0.47%, Si:0.07-0.09%, P:0.006-0.008%, S:0.002-0.005%, Nb:0.06-0.08%, V:0.07-0.09%, Ti:0.05-0.07%, Al:0.08-0.1%, N≤0.006%, H≤0.00020%, Cu:0.012-0.015%, Cr:0.4-0.6%, Mo:0.23-0.25%, surplus is Fe and inevitable impurity;
In this steel, first-phase is tempered sorbite, second-phase is reversed austenite, third phase is lath martensite, converes instruction is mainly distributed in lath martensite border, at thickness place, surface to 1/4, second-phase percent by volume is 4.5-4.8%, third phase percent by volume is 3.5-3.8%, and 1/4 thickness is 6.0-6.3% to center second-phase percent by volume, and third phase percent by volume is 4.5-4.8%.
2. as claimed in claim 1 for the 9Ni steel of steel building, it is characterized in that: its composition and mass percent are: C:0.31%, Ni:9.50%, Mn:0.45%, Si:0.07%, P:0.006%, S:0.002%, Nb:0.06%, V:0.07%, Ti:0.05%, Al:0.08%, N:0.006%, H:0.00020%, Cu:0.012%, Cr:0.4%, Mo:0.23%, surplus is Fe and inevitable impurity;
In this steel, first-phase is tempered sorbite, second-phase is reversed austenite, third phase is lath martensite, converes instruction is mainly distributed in lath martensite border, at thickness place, surface to 1/4, second-phase percent by volume is 4.5%, third phase percent by volume is 3.58%, 1/4 thickness is 6.0% to center second-phase percent by volume, and third phase percent by volume is 4.5%.
3. as claimed in claim 1 for the 9Ni steel of steel building, it is characterized in that: its composition and mass percent are: C:0.32%, Ni:9.60, Mn:0.46%, Si:0.08%, P:0.007%, S:0.003%, Nb:0.07%, V:0.08%, Ti:0.06%, Al:0.09%, N:0.002%, H:0.0001%, Cu:0.013%, Cr:0.5%, Mo:0.24%, surplus is Fe and inevitable impurity;
In this steel, first-phase is tempered sorbite, second-phase is reversed austenite, third phase is lath martensite, converes instruction is mainly distributed in lath martensite border, at thickness place, surface to 1/4, second-phase percent by volume is 4.6%, third phase percent by volume is 3.7%, 1/4 thickness is 6.2% to center second-phase percent by volume, and third phase percent by volume is 4.6%.
4. as claimed in claim 1 for the 9Ni steel of steel building, it is characterized in that: its composition and mass percent are: C:0.33%, Ni:9.70%, Mn:0.47%, Si:0.09%, P:0.008%, S:0.005%, Nb:0.08%, V:0.09%, Ti:0.07%, Al:0.1%, N:0.002%, H:0.00012%, Cu:0.015%, Cr:0.6%, Mo:0.25%, surplus is Fe and inevitable impurity;
In this steel, first-phase is tempered sorbite, second-phase is reversed austenite, third phase is lath martensite, converes instruction is mainly distributed in lath martensite border, at thickness place, surface to 1/4, second-phase percent by volume is 4.8%, third phase percent by volume is 3.8%, 1/4 thickness is 6.3% to center second-phase percent by volume, and third phase percent by volume is 4.8%.
5. the 9Ni Heat Treatment Of Steel technique for steel building as described in claim arbitrary in claim 1-4, adopt the thermal treatment process of quenching-two-phase region intercritical hardening-tempering, it is characterized in that: described quenching temperature is 930-950 DEG C, carry out in normalizing furnace, the first refrigerating work procedure is adopted to be chilled to room temperature, make to organize complete austenitizing, impurity and second phase particles back dissolving, fining austenite grains; Two-phase region intercritical hardening temperature is 720-740 DEG C, carries out in normalizing furnace, adopts the second refrigerating work procedure to be chilled to room temperature, obtains tiny ferrite and martensitic stucture; Described tempering temperature is 610-630 DEG C, carry out in tempering stove, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, obtain the tissue based on tempered sorbite, and the increasing number of reversed austenite in steel is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed; Meanwhile, make Carbide Precipitation amount comparatively large, and small and dispersed;
Described first refrigerating work procedure: first adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 15-17 DEG C/s, steel is cooled to 570-590 DEG C, adopt water-cooled, with the rate of cooling of 7-9 DEG C/s, steel is cooled to 420-450 DEG C again, then air cooling is to 350-370 DEG C, finally adopts water-cooled, with the rate of cooling of 4-6 DEG C/s, steel is cooled to room temperature;
Described second refrigerating work procedure: first adopt water-cooled, with the rate of cooling of 7-9 DEG C/s, steel is cooled to 520-550 DEG C, then air cooling is to 450-470 DEG C, then adopts water-cooled, with the rate of cooling of 4-6 DEG C/s, steel is cooled to room temperature;
Described 3rd refrigerating work procedure: first adopt the air-cooled rate of cooling with 2-4 DEG C/s that steel is cooled to 510-530 DEG C, adopt water-cooled, with the rate of cooling of 4-6 DEG C/s, steel is cooled to 370-390 DEG C again, finally adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 7-9 DEG C/s, steel is cooled to room temperature.
6. as claimed in claim 5 for the 9Ni Heat Treatment Of Steel technique of steel building, it is characterized in that: described quenching temperature is 930 DEG C, carry out in normalizing furnace, the first refrigerating work procedure is adopted to be chilled to room temperature, make to organize complete austenitizing, impurity and second phase particles back dissolving, fining austenite grains; Two-phase region intercritical hardening temperature is 720 DEG C, carries out in normalizing furnace, adopts the second refrigerating work procedure to be chilled to room temperature, obtains tiny ferrite and martensitic stucture; Described tempering temperature is 610 DEG C, carry out in tempering stove, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, obtain the tissue based on tempered sorbite, and the increasing number of reversed austenite in steel is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed; Meanwhile, make Carbide Precipitation amount comparatively large, and small and dispersed;
Described first refrigerating work procedure: first adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 15 DEG C/s, steel is cooled to 570 DEG C, adopt water-cooled, with the rate of cooling of 7 DEG C/s, steel is cooled to 420 DEG C again, then air cooling to 350 DEG C, finally adopts water-cooled, with the rate of cooling of 4 DEG C/s, steel is cooled to room temperature;
Described second refrigerating work procedure: first adopt water-cooled with the rate of cooling of 7 DEG C/s, steel to be cooled to 520 DEG C, then air cooling to 450 DEG C, then adopt water-cooled, with the rate of cooling of 4 DEG C/s, steel is cooled to room temperature;
Described 3rd refrigerating work procedure: first adopt and air-cooledly with the rate of cooling of 2 DEG C/s, steel is cooled to 510 DEG C, adopt water-cooled, with the rate of cooling of 4 DEG C/s, steel is cooled to 370 DEG C again, finally adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 7 DEG C/s, steel is cooled to room temperature.
7. as claimed in claim 5 for the 9Ni Heat Treatment Of Steel technique of steel building, it is characterized in that: described quenching temperature is 940 DEG C, carry out in normalizing furnace, the first refrigerating work procedure is adopted to be chilled to room temperature, make to organize complete austenitizing, impurity and second phase particles back dissolving, fining austenite grains; Two-phase region intercritical hardening temperature is 730 DEG C, carries out in normalizing furnace, adopts the second refrigerating work procedure to be chilled to room temperature, obtains tiny ferrite and martensitic stucture; Described tempering temperature is 620 DEG C, carry out in tempering stove, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, obtain the tissue based on tempered sorbite, and the increasing number of reversed austenite in steel is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed; Meanwhile, make Carbide Precipitation amount comparatively large, and small and dispersed;
Described first refrigerating work procedure: first adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 16 DEG C/s, steel is cooled to 580 DEG C, adopt water-cooled, with the rate of cooling of 8 DEG C/s, steel is cooled to 430 DEG C again, then air cooling to 360 DEG C, finally adopts water-cooled, with the rate of cooling of 5 DEG C/s, steel is cooled to room temperature;
Described second refrigerating work procedure: first adopt water-cooled with the rate of cooling of 8 DEG C/s, steel to be cooled to 530 DEG C, then air cooling to 460 DEG C, then adopt water-cooled, with the rate of cooling of 5 DEG C/s, steel is cooled to room temperature;
Described 3rd refrigerating work procedure: first adopt and air-cooledly with the rate of cooling of 3 DEG C/s, steel is cooled to 520 DEG C, adopt water-cooled, with the rate of cooling of 5 DEG C/s, steel is cooled to 380 DEG C again, finally adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 8 DEG C/s, steel is cooled to room temperature.
8. as claimed in claim 5 for the 9Ni Heat Treatment Of Steel technique of steel building, it is characterized in that: described quenching temperature is 950 DEG C, carry out in normalizing furnace, the first refrigerating work procedure is adopted to be chilled to room temperature, make to organize complete austenitizing, impurity and second phase particles back dissolving, fining austenite grains; Two-phase region intercritical hardening temperature is 740 DEG C, carries out in normalizing furnace, adopts the second refrigerating work procedure to be chilled to room temperature, obtains tiny ferrite and martensitic stucture; Described tempering temperature is 630 DEG C, carry out in tempering stove, the 3rd refrigerating work procedure is adopted to be chilled to room temperature, obtain the tissue based on tempered sorbite, and the increasing number of reversed austenite in steel is made by martensitic reverted austenite, and converes instruction is mainly distributed in lath martensite border, makes to organize disperse more, be uniformly distributed; Meanwhile, make Carbide Precipitation amount comparatively large, and small and dispersed;
Described first refrigerating work procedure: first adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 17 DEG C/s, steel is cooled to 590 DEG C, adopt water-cooled, with the rate of cooling of 9 DEG C/s, steel is cooled to 450 DEG C again, then air cooling to 370 DEG C, finally adopts water-cooled, with the rate of cooling of 6 DEG C/s, steel is cooled to room temperature;
Described second refrigerating work procedure: first adopt water-cooled with the rate of cooling of 9 DEG C/s, steel to be cooled to 550 DEG C, then air cooling to 470 DEG C, then adopt water-cooled, with the rate of cooling of 6 DEG C/s, steel is cooled to room temperature;
Described 3rd refrigerating work procedure: first adopt and air-cooledly with the rate of cooling of 4 DEG C/s, steel is cooled to 530 DEG C, adopt water-cooled, with the rate of cooling of 6 DEG C/s, steel is cooled to 390 DEG C again, finally adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 9 DEG C/s, steel is cooled to room temperature.
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| CN109576449A (en) * | 2018-12-27 | 2019-04-05 | 江阴兴澄特种钢铁有限公司 | A kind of production method resisted remanent magnetism and increase, save the 9Ni steel plate of production energy consumption |
| CN110106445A (en) * | 2019-06-05 | 2019-08-09 | 上海大学 | One kind is for ocean platform cast node high intensity high/low temperature toughness steel and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215668A (en) * | 2008-01-16 | 2008-07-09 | 东北大学 | A kind of manufacturing method of low carbon 9Ni steel plate |
| CN101649369A (en) * | 2009-08-28 | 2010-02-17 | 河南省四达仙龙实业有限公司 | Melting process for producing synthetic cast iron by utilizing SiC carburizing siliconizing |
| CN102615108A (en) * | 2012-04-09 | 2012-08-01 | 北京工业大学 | Centrifugal casting high-speed steel composite roll and manufacture method thereof |
| DE202013011124U1 (en) * | 2013-12-10 | 2014-01-08 | Eduard Galinker | Dry composition for hydrogen production in local and mobile energy systems using the alloy "ferrosilicon" as reducing agent |
| CN104264078A (en) * | 2009-04-01 | 2015-01-07 | 罗瓦玛股份公司 | Hot working tool steel with excellent toughness and thermal conductivity |
-
2015
- 2015-03-23 CN CN201510126798.9A patent/CN104694839B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215668A (en) * | 2008-01-16 | 2008-07-09 | 东北大学 | A kind of manufacturing method of low carbon 9Ni steel plate |
| CN104264078A (en) * | 2009-04-01 | 2015-01-07 | 罗瓦玛股份公司 | Hot working tool steel with excellent toughness and thermal conductivity |
| CN101649369A (en) * | 2009-08-28 | 2010-02-17 | 河南省四达仙龙实业有限公司 | Melting process for producing synthetic cast iron by utilizing SiC carburizing siliconizing |
| CN102615108A (en) * | 2012-04-09 | 2012-08-01 | 北京工业大学 | Centrifugal casting high-speed steel composite roll and manufacture method thereof |
| DE202013011124U1 (en) * | 2013-12-10 | 2014-01-08 | Eduard Galinker | Dry composition for hydrogen production in local and mobile energy systems using the alloy "ferrosilicon" as reducing agent |
Non-Patent Citations (1)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局: "低温压力容器用9%Ni钢板", 《中华人民共和国国家标准》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109576449A (en) * | 2018-12-27 | 2019-04-05 | 江阴兴澄特种钢铁有限公司 | A kind of production method resisted remanent magnetism and increase, save the 9Ni steel plate of production energy consumption |
| CN109576449B (en) * | 2018-12-27 | 2020-10-30 | 江阴兴澄特种钢铁有限公司 | Production method of 9Ni steel plate capable of resisting residual magnetism increase and saving production energy consumption |
| CN110106445A (en) * | 2019-06-05 | 2019-08-09 | 上海大学 | One kind is for ocean platform cast node high intensity high/low temperature toughness steel and preparation method thereof |
| CN110106445B (en) * | 2019-06-05 | 2021-04-16 | 上海大学 | High-strength high-low-temperature-toughness steel for ocean platform casting node and preparation method thereof |
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| Publication number | Publication date |
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| CN104694839B (en) | 2017-04-05 |
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