CN108103286A - A kind of heat treatment method of steel alloy - Google Patents
A kind of heat treatment method of steel alloy Download PDFInfo
- Publication number
- CN108103286A CN108103286A CN201810062446.5A CN201810062446A CN108103286A CN 108103286 A CN108103286 A CN 108103286A CN 201810062446 A CN201810062446 A CN 201810062446A CN 108103286 A CN108103286 A CN 108103286A
- Authority
- CN
- China
- Prior art keywords
- stove
- cooled
- air
- conditions
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
-
- 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
-
- 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
- C21D1/28—Normalising
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
- C23C8/30—Carbo-nitriding
- C23C8/32—Carbo-nitriding of ferrous surfaces
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a kind of heat treatment methods of steel alloy, are related to machine components technical field of heat treatment, comprise the following steps：(1) common annealing；(2) isothermal annealing；(3) normalizing；(4) high tempering；(5) quench；(6) lonneal；(7) carbo-nitriding.The alloy steel heat treatment method of the present invention so as to make the structural transformation of low alloy steel castings abundant, effectively improves its mechanical performance and impact flexibility, suitable for promoting and applying by properly increasing heating temperature and extending soaking time.
Description
Technical field
The present invention relates to machine components technical field of heat treatment, and in particular to a kind of heat treatment method of steel alloy.
Background technology
Low alloy steel castings progressively substitutes ordinary carbon steel part, is widely used in because having many advantages, such as high intensity, high-wearing feature
The materials such as casting field, especially ZG42CrMo, ZG35CrMo, intensity are 2-3 times of ordinary carbon steel.In practical applications,
Need intensity, hardness and the toughness of reasonable selection low-alloy steel.At present, the heat treatment process of low alloy steel castings is generally using just
Fire-quenching-tempering, wherein hardening media quenching oil, ratio by mass is than 1：10, i.e. 1 ton of casting is put into 10 tons of quenching oils,
To ensure quenching effect, conventional low-alloy steel since heat treatment process flow and the chemical composition element accounting of itself are different,
And then the mechanical performance of finished product cast is caused to reduce, it can not meet functional need, therefore, it is necessary to improve.
The content of the invention
For problems of the prior art, the present invention provides a kind of heat treatment method of steel alloy, at this kind heat
Reason method by properly increasing heating temperature and extending soaking time, fill by the structural transformation so as to make low alloy steel castings
Point, its mechanical performance and impact flexibility are effectively improved, suitable for promoting and applying.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of heat treatment method of steel alloy, follows the steps below：
(1) common annealing：Alloy steel piece is placed in annealing furnace, the heating and thermal insulation 1-2h under the conditions of 740-780 DEG C, with stove
After being air-cooled to 580-620 DEG C, come out of the stove and be air-cooled to room temperature；
(2) isothermal annealing：Alloy steel piece is placed in annealing furnace, the heating and thermal insulation 30-40min under the conditions of 780-820 DEG C,
The isothermal 2-3h under the conditions of 680-720 DEG C afterwards, comes out of the stove and is air-cooled to room temperature；
(3) normalizing：Alloy steel piece is placed in normalizing furnace, is first warming up to 820-860 DEG C, keeps the temperature 40-50min；Afterwards with
Stove is air-cooled to 380-420 DEG C；700-720 DEG C is warming up to again, keeps the temperature 35-45min；Normalizing temperature is finally risen to 860-900 DEG C,
Keep the temperature 20-30min；380-420 DEG C is air-cooled to stove, then comes out of the stove and is air-cooled to room temperature；
(4) high tempering：By alloy steel piece under the conditions of 640-680 DEG C heating and thermal insulation 1-2h, be air-cooled to 380-420 with stove
℃；
(5) quench：Alloy steel piece is delivered in glowing furnace, the heating and thermal insulation 25-35min under the conditions of 820-860 DEG C, oil
Quench 20-30s；
(6) lonneal：Alloy steel piece is delivered in tempering furnace, the temper 2-3h under the conditions of 150-170 DEG C goes out
Stove is air-cooled to room temperature；
(7) carbo-nitriding：Alloy steel piece is delivered in vacuum carbo-nitriding stove, the permeation under the conditions of 820-840 DEG C
1.5-3h, oil quenching 30-40s, in -40 DEG C to -30 DEG C subzero treatment 40-50min, the temper 1- under the conditions of 150-170 DEG C
2h comes out of the stove and is air-cooled to room temperature.
Preferably, the steel alloy includes following element by mass percentage：C：0.05-0.15%, Si：0.08-
0.24%, Cr：0.25-0.55%, Mn：0.40-0.86%, Ni：0.75-1.35%, Cu：0.05-0.20%, P：≤
0.008%；S：≤ 0.004%；N：0.004-0.008%；Zn：0.002-0.005%；Surplus is Fe and not removable impurity
Element.
Further, the steel alloy includes following element by mass percentage：C：0.08-0.12%, Si：0.12-
0.20%, Cr：0.30-0.45%, Mn：0.50-0.75%, Ni：0.85-1.20%, Cu：0.10-0.16%, P：≤
0.006%；S：≤ 0.003%；N：0.005-0.007%；Zn：0.003-0.005%；Surplus is Fe and not removable impurity
Element.
Further, the steel alloy includes following element by mass percentage：C：0.01%, Si：0.16%,
Cr：0.35%, Mn：0.65%, Ni：1.05%, Cu：0.13%, P：≤ 0.005%；S：≤ 0.003%；N：0.006%；Zn：
0.004%；Surplus is Fe and not removable impurity element.
Preferably, for the oil quenching using L-ANl00 oil, oil quenching temperature is 45-55 DEG C.
Preferably, in carbo-nitriding processing, nitrogen source is ammonia, and carbon source is methanol and propane.
Further, the normalizing is that 840 DEG C are first warming up to alloy steel piece, keeps the temperature 45min；It is air-cooled to afterwards with stove
400℃；710 DEG C are warming up to again, keep the temperature 40min；Normalizing temperature is finally risen to 880 DEG C, keeps the temperature 25min；400 are air-cooled to stove
DEG C, then come out of the stove and be air-cooled to room temperature.
Further, in carbo-nitriding processing, carbo-nitriding temperature is 830 DEG C, and the permeation time is 2h, after permeation
Oil quenching 35s, then in -35 DEG C of subzero treatment 45min, the temper 1.5h under the conditions of 160 DEG C, comes out of the stove and is air-cooled to room temperature afterwards.
The present invention has following advantageous effect：The present invention alloy steel heat treatment process by adjusting heating process, plus
Hot soaking time, heating temperature so as to make the structural transformation of steel abundant, effectively improve mechanical performance and impact flexibility, most
The strictly control type of cooling and method, the complete transformation that ensure that the enough quenching degree of steel and organize afterwards, and carry out every machine
Tool service check, especially impact test, it is qualified that all technical reaches 100%.The heat treatment process of the present invention is using general
The technological process of logical annealing+isothermal annealing+normalizing+high tempering+quenching+lonneal+carbo-nitriding, with traditional heat treatment
Technique is compared, and advantage is further refinement and even grained, farthest improves grain size, and accurate for postorder heat treatment
Standby good organization condition.
Specific embodiment
The specific embodiment of the present invention is further described with reference to embodiment, following embodiment is only used for more
Technical scheme is clearly demonstrated, and is not intended to limit the protection scope of the present invention and limits the scope of the invention.
Embodiment 1
A kind of steel alloy includes following element by mass percentage：C：0.05%, Si：0.08%, Cr：0.25%, Mn：
0.40%, Ni：0.75%, Cu：0.05%, P：≤ 0.008%；S：≤ 0.004%；N：0.004%；Zn：0.002%；Surplus
For Fe and not removable impurity element；
The heat treatment method of this kind of steel alloy, follows the steps below：
(1) common annealing：Alloy steel piece is placed in annealing furnace, heating and thermal insulation 1h, is air-cooled to stove under the conditions of 740 DEG C
After 580 DEG C, come out of the stove and be air-cooled to room temperature；
(2) isothermal annealing：Alloy steel piece is placed in annealing furnace, heating and thermal insulation 30min, Zhi Hou under the conditions of 780 DEG C
Isothermal 2h, comes out of the stove and is air-cooled to room temperature under the conditions of 680 DEG C；
(3) normalizing：Alloy steel piece is placed in normalizing furnace, is first warming up to 820 DEG C, keeps the temperature 40min；It is air-cooled to afterwards with stove
380℃；700 DEG C are warming up to again, keep the temperature 35min；Normalizing temperature is finally risen to 860 DEG C, keeps the temperature 20min；380 are air-cooled to stove
DEG C, then come out of the stove and be air-cooled to room temperature；
(4) high tempering：By alloy steel piece under the conditions of 640 DEG C heating and thermal insulation 1h, be air-cooled to 380 DEG C with stove；
(5) quench：Alloy steel piece is delivered in glowing furnace, heating and thermal insulation 25min, oil quenching 20s under the conditions of 820 DEG C；
(6) lonneal：Alloy steel piece is delivered in tempering furnace, the temper 2h under the conditions of 150 DEG C comes out of the stove air-cooled
To room temperature；
(7) carbo-nitriding：Alloy steel piece is delivered in vacuum carbo-nitriding stove, the permeation 1.5h under the conditions of 820 DEG C,
In, nitrogen source uses ammonia, and carbon source uses methanol and propane, and the volume ratio of the two is 1:4, including following three phases：
Ooze the stage by force：Carbon-potential control is 0.75%, oozes the time by force for 0.5h,
Diffusion phase：Carbon-potential control is 1.05%, diffusion time 1h,
In carbo-nitriding processing, above-mentioned methanol and propane are passed through in the strong stage of oozing, until stop at the end of holding stage,
During being somebody's turn to do, the flow of methanol and propane is 1.2L/min；Above-mentioned ammonia is passed through when diffusion phase starts, until holding stage
At the end of stop, should during, the flow of ammonia is 2.0L/min；
Oil quenching 30s after carbo-nitriding, oil quenching temperature are 45 DEG C, and oil quenching terminates postposition using L-ANl00 oil, oil quenching
The subzero treatment 40min in the deep cooling box at -40 DEG C, finally the temper 1h under the conditions of 150 DEG C, comes out of the stove and is air-cooled to room temperature i.e.
It can.
Embodiment 2
A kind of steel alloy includes following element by mass percentage：C：0.08%, Si：0.12%, Cr：0.30%, Mn：
0.50%, Ni：0.85%, Cu：0.10%, P：≤ 0.006%；S：≤ 0.003%；N：0.005%；Zn：0.003%；Surplus
For Fe and not removable impurity element；
The heat treatment method of this kind of steel alloy, follows the steps below：
(1) common annealing：Alloy steel piece is placed in annealing furnace, heating and thermal insulation 1.2h, air-cooled with stove under the conditions of 750 DEG C
To after 570 DEG C, come out of the stove and be air-cooled to room temperature；
(2) isothermal annealing：Alloy steel piece is placed in annealing furnace, heating and thermal insulation 35min, Zhi Hou under the conditions of 790 DEG C
Isothermal 2.2h, comes out of the stove and is air-cooled to room temperature under the conditions of 690 DEG C；
(3) normalizing：Alloy steel piece is placed in normalizing furnace, is first warming up to 830 DEG C, keeps the temperature 45min；It is air-cooled to afterwards with stove
390℃；710 DEG C are warming up to again, keep the temperature 40min；Normalizing temperature is finally risen to 870 DEG C, keeps the temperature 25min；390 are air-cooled to stove
DEG C, then come out of the stove and be air-cooled to room temperature；
(4) high tempering：By alloy steel piece under the conditions of 650 DEG C heating and thermal insulation 1.2h, be air-cooled to 390 DEG C with stove；
(5) quench：Alloy steel piece is delivered in glowing furnace, heating and thermal insulation 30min, oil quenching 25s under the conditions of 830 DEG C；
(6) lonneal：Alloy steel piece is delivered in tempering furnace, the temper 2.2h under the conditions of 155 DEG C, sky of coming out of the stove
It is cooled to room temperature；
(7) carbo-nitriding：Alloy steel piece is delivered in vacuum carbo-nitriding stove, the permeation 2h under the conditions of 830 DEG C,
In, nitrogen source uses ammonia, and carbon source uses methanol and propane, and the volume ratio of the two is 1:3, including following three phases：
Ooze the stage by force：Carbon-potential control is 0.85%, oozes the time by force for 0.6h,
Diffusion phase：Carbon-potential control is 1.05%, diffusion time 1.4h,
In carbo-nitriding processing, above-mentioned methanol and propane are passed through in the strong stage of oozing, until stop at the end of holding stage,
During being somebody's turn to do, the flow of methanol and propane is 1.2L/min；Above-mentioned ammonia is passed through when diffusion phase starts, until holding stage
At the end of stop, should during, the flow of ammonia is 2.0L/min；
Oil quenching 35s after carbo-nitriding, oil quenching temperature are 40 DEG C, and oil quenching terminates postposition using L-ANl00 oil, oil quenching
The subzero treatment 45min in the deep cooling box at -35 DEG C, finally the temper 1.2h under the conditions of 160 DEG C, comes out of the stove and is air-cooled to room temperature
.
Embodiment 3
A kind of steel alloy includes following element by mass percentage：C：0.01%, Si：0.16%, Cr：0.35%, Mn：
0.65%, Ni：1.05%, Cu：0.13%, P：≤ 0.005%；S：≤ 0.003%；N：0.006%；Zn：0.004%；Surplus
For Fe and not removable impurity element；
The heat treatment method of this kind of steel alloy, follows the steps below：
(1) common annealing：Alloy steel piece is placed in annealing furnace, heating and thermal insulation 1.5h, air-cooled with stove under the conditions of 760 DEG C
To after 600 DEG C, come out of the stove and be air-cooled to room temperature；
(2) isothermal annealing：Alloy steel piece is placed in annealing furnace, heating and thermal insulation 35min, Zhi Hou under the conditions of 800 DEG C
Isothermal 2.5h, comes out of the stove and is air-cooled to room temperature under the conditions of 700 DEG C；
(3) normalizing：Alloy steel piece is placed in normalizing furnace, is first warming up to 840 DEG C, keeps the temperature 45min；It is air-cooled to afterwards with stove
400℃；710 DEG C are warming up to again, keep the temperature 40min；Normalizing temperature is finally risen to 880 DEG C, keeps the temperature 25min；400 are air-cooled to stove
DEG C, then come out of the stove and be air-cooled to room temperature；
(4) high tempering：By alloy steel piece under the conditions of 660 DEG C heating and thermal insulation 1.5h, be air-cooled to 400 DEG C with stove；
(5) quench：Alloy steel piece is delivered in glowing furnace, heating and thermal insulation 30min, oil quenching 25s under the conditions of 840 DEG C；
(6) lonneal：Alloy steel piece is delivered in tempering furnace, the temper 2-3h under the conditions of 150-170 DEG C goes out
Stove is air-cooled to room temperature；
(7) carbo-nitriding：Alloy steel piece is delivered in vacuum carbo-nitriding stove, the permeation 2.5h under the conditions of 830 DEG C,
In, nitrogen source uses ammonia, and carbon source uses methanol and propane, and the volume ratio of the two is 1:4, including following three phases：
Ooze the stage by force：Carbon-potential control is 0.8%, oozes the time by force for 1h,
Diffusion phase：Carbon-potential control is 1.15%, diffusion time 1.5h,
In carbo-nitriding processing, above-mentioned methanol and propane are passed through in the strong stage of oozing, until stop at the end of holding stage,
During being somebody's turn to do, the flow of methanol and propane is 1.2L/min；Above-mentioned ammonia is passed through when diffusion phase starts, until holding stage
At the end of stop, should during, the flow of ammonia is 2.0L/min；
Oil quenching 35s after carbo-nitriding, oil quenching temperature are 50 DEG C, and oil quenching terminates postposition using L-ANl00 oil, oil quenching
The subzero treatment 45min in the deep cooling box at -35 DEG C, finally the temper 1.5h under the conditions of 160 DEG C, comes out of the stove and is air-cooled to room temperature
.
Embodiment 4
A kind of steel alloy includes following element by mass percentage：C：0.12%, Si：0.20%, Cr：0.45%, Mn：
0.75%, Ni：1.20%, Cu：0.16%, P：≤ 0.006%；S：≤ 0.003%；N：0.007%；Zn：0.005%；Surplus
For Fe and not removable impurity element；
The heat treatment method of this kind of steel alloy, follows the steps below：
(1) common annealing：Alloy steel piece is placed in annealing furnace, heating and thermal insulation 1.5h, air-cooled with stove under the conditions of 770 DEG C
To after 610 DEG C, come out of the stove and be air-cooled to room temperature；
(2) isothermal annealing：Alloy steel piece is placed in annealing furnace, heating and thermal insulation 35min, Zhi Hou under the conditions of 810 DEG C
Isothermal 2.8h, comes out of the stove and is air-cooled to room temperature under the conditions of 710 DEG C；
(3) normalizing：Alloy steel piece is placed in normalizing furnace, is first warming up to 850 DEG C, keeps the temperature 45min；It is air-cooled to afterwards with stove
410℃；710 DEG C are warming up to again, keep the temperature 40min；Normalizing temperature is finally risen to 890 DEG C, keeps the temperature 25min；410 are air-cooled to stove
DEG C, then come out of the stove and be air-cooled to room temperature；
(4) high tempering：By alloy steel piece under the conditions of 670 DEG C heating and thermal insulation 1.8h, be air-cooled to 410 DEG C with stove；
(5) quench：Alloy steel piece is delivered in glowing furnace, heating and thermal insulation 30min, oil quenching 25s under the conditions of 850 DEG C；
(6) lonneal：Alloy steel piece is delivered in tempering furnace, the temper 2.8h under the conditions of 165 DEG C, sky of coming out of the stove
It is cooled to room temperature；
(7) carbo-nitriding：Alloy steel piece is delivered in vacuum carbo-nitriding stove, the permeation 2.5h under the conditions of 835 DEG C,
In, nitrogen source uses ammonia, and carbon source uses methanol and propane, and the volume ratio of the two is 2:5, including following three phases：
Ooze the stage by force：Carbon-potential control is 0.75%, oozes the time by force for 1h,
Diffusion phase：Carbon-potential control is 1.15%, diffusion time 1.5h,
In carbo-nitriding processing, above-mentioned methanol and propane are passed through in the strong stage of oozing, until stop at the end of holding stage,
During being somebody's turn to do, the flow of methanol and propane is 1.2L/min；Above-mentioned ammonia is passed through when diffusion phase starts, until holding stage
At the end of stop, should during, the flow of ammonia is 2.0L/min；
Oil quenching 35s after carbo-nitriding, oil quenching temperature are 50 DEG C, and oil quenching terminates postposition using L-ANl00 oil, oil quenching
The subzero treatment 45min in the deep cooling box at -35 DEG C, finally the temper 1.8h under the conditions of 165 DEG C, comes out of the stove and is air-cooled to room temperature
.
Embodiment 5
A kind of steel alloy includes following element by mass percentage：C：0.15%, Si：0.24%, Cr：0.55%, Mn：
0.86%, Ni：1.35%, Cu：0.20%, P：≤ 0.008%；S：≤ 0.004%；N：0.008%；Zn：0.005%；Surplus
For Fe and not removable impurity element；
The heat treatment method of this kind of steel alloy, follows the steps below：
(1) common annealing：Alloy steel piece is placed in annealing furnace, heating and thermal insulation 2h, is air-cooled to stove under the conditions of 780 DEG C
After 620 DEG C, come out of the stove and be air-cooled to room temperature；
(2) isothermal annealing：Alloy steel piece is placed in annealing furnace, heating and thermal insulation 40min, Zhi Hou under the conditions of 820 DEG C
Isothermal 3h, comes out of the stove and is air-cooled to room temperature under the conditions of 720 DEG C；
(3) normalizing：Alloy steel piece is placed in normalizing furnace, is first warming up to 860 DEG C, keeps the temperature 50min；It is air-cooled to afterwards with stove
420℃；720 DEG C are warming up to again, keep the temperature 45min；Normalizing temperature is finally risen to 900 DEG C, keeps the temperature 30min；420 are air-cooled to stove
DEG C, then come out of the stove and be air-cooled to room temperature；
(4) high tempering：By alloy steel piece under the conditions of 680 DEG C heating and thermal insulation 2h, be air-cooled to 420 DEG C with stove；
(5) quench：Alloy steel piece is delivered in glowing furnace, heating and thermal insulation 35min, oil quenching 30s under the conditions of 860 DEG C；
(6) lonneal：Alloy steel piece is delivered in tempering furnace, the temper 3h under the conditions of 170 DEG C comes out of the stove air-cooled
To room temperature；
(7) carbo-nitriding：Alloy steel piece is delivered in vacuum carbo-nitriding stove, the permeation 3h under the conditions of 840 DEG C,
In, nitrogen source uses ammonia, and carbon source uses methanol and propane, and the volume ratio of the two is 1:4, including following three phases：
Ooze the stage by force：Carbon-potential control is 0.85%, oozes the time by force for 1.5h,
Diffusion phase：Carbon-potential control is 1.05%, diffusion time 1.5h,
In carbo-nitriding processing, above-mentioned methanol and propane are passed through in the strong stage of oozing, until stop at the end of holding stage,
During being somebody's turn to do, the flow of methanol and propane is 1.2L/min；Above-mentioned ammonia is passed through when diffusion phase starts, until holding stage
At the end of stop, should during, the flow of ammonia is 2.0L/min；
Oil quenching 40s after carbo-nitriding, oil quenching temperature are 55 DEG C, and oil quenching terminates postposition using L-ANl00 oil, oil quenching
In -- subzero treatment 50min in 30 DEG C of deep cooling box, finally the temper 2h under the conditions of 170 DEG C, comes out of the stove and is air-cooled to room temperature
.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, although with reference to foregoing reality
Example is applied the present invention is described in detail, it for those skilled in the art, still can be to foregoing each implementation
Technical solution recorded in example modifies or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
With within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of heat treatment method of steel alloy, which is characterized in that comprise the following steps：
(1) common annealing：Alloy steel piece is placed in annealing furnace, the heating and thermal insulation 1-2h under the conditions of 740-780 DEG C is air-cooled with stove
To after 580-620 DEG C, come out of the stove and be air-cooled to room temperature；
(2) isothermal annealing：Alloy steel piece is placed in annealing furnace, the heating and thermal insulation 30-40min under the conditions of 780-820 DEG C, afterwards
The isothermal 2-3h under the conditions of 680-720 DEG C, comes out of the stove and is air-cooled to room temperature；
(3) normalizing：Alloy steel piece is placed in normalizing furnace, is first warming up to 820-860 DEG C, keeps the temperature 40-50min；It is empty with stove afterwards
It is cooled to 380-420 DEG C；700-720 DEG C is warming up to again, keeps the temperature 35-45min；Normalizing temperature is finally risen to 860-900 DEG C, heat preservation
20-30min；380-420 DEG C is air-cooled to stove, then comes out of the stove and is air-cooled to room temperature；
(4) high tempering：By alloy steel piece under the conditions of 640-680 DEG C heating and thermal insulation 1-2h, be air-cooled to 380-420 DEG C with stove；
(5) quench：Alloy steel piece is delivered in glowing furnace, the heating and thermal insulation 25-35min under the conditions of 820-860 DEG C, oil quenching
20-30s；
(6) lonneal：Alloy steel piece is delivered in tempering furnace, the temper 2-3h under the conditions of 150-170 DEG C, sky of coming out of the stove
It is cooled to room temperature；
(7) carbo-nitriding：Alloy steel piece is delivered in vacuum carbo-nitriding stove, the permeation 1.5-3h under the conditions of 820-840 DEG C,
Oil quenching 30-40s, in -40 DEG C to -30 DEG C subzero treatment 40-50min, the temper 1-2h under the conditions of 150-170 DEG C comes out of the stove
It is air-cooled to room temperature.
2. the heat treatment method of a kind of steel alloy according to claim 1, which is characterized in that the steel alloy includes following
Element by mass percentage：C：0.05-0.15%, Si：0.08-0.24%, Cr：0.25-0.55%, Mn：0.40-
0.86%, Ni：0.75-1.35%, Cu：0.05-0.20%, P：≤ 0.008%；S：≤ 0.004%；N：0.004-0.008%；
Zn：0.002-0.005%；Surplus is Fe and not removable impurity element.
3. the heat treatment method of a kind of steel alloy according to claim 1, which is characterized in that the steel alloy includes following
Element by mass percentage：C：0.08-0.12%, Si：0.12-0.20%, Cr：0.30-0.45%, Mn：0.50-
0.75%, Ni：0.85-1.20%, Cu：0.10-0.16%, P：≤ 0.006%；S：≤ 0.003%；N：0.005-0.007%；
Zn：0.003-0.005%；Surplus is Fe and not removable impurity element.
4. the heat treatment method of a kind of steel alloy according to claim 1, which is characterized in that the steel alloy includes following
Element by mass percentage：C：0.01%, Si：0.16%, Cr：0.35%, Mn：0.65%, Ni：1.05%, Cu：
0.13%, P：≤ 0.005%；S：≤ 0.003%；N：0.006%；Zn：0.004%；Surplus is Fe and not removable impurity
Element.
5. a kind of heat treatment method of steel alloy according to claim 1, which is characterized in that the oil quenching using L-
ANl00 oil, oil quenching temperature are 45-55 DEG C.
6. a kind of heat treatment method of steel alloy according to claim 1, which is characterized in that in carbo-nitriding processing,
Nitrogen source is ammonia, and carbon source is methanol and propane.
7. the heat treatment method of a kind of steel alloy according to claim 1, which is characterized in that the normalizing is first to alloy
Steel part is warming up to 840 DEG C, keeps the temperature 45min；Afterwards 400 DEG C are air-cooled to stove；710 DEG C are warming up to again, keep the temperature 40min；Finally will
Normalizing temperature rises to 880 DEG C, keeps the temperature 25min；400 DEG C are air-cooled to stove, then comes out of the stove and is air-cooled to room temperature.
8. a kind of heat treatment method of steel alloy according to claim 1, which is characterized in that in carbo-nitriding processing,
Carbo-nitriding temperature is 830 DEG C, and the permeation time is 2h, oil quenching 35s after permeation, then in -35 DEG C of subzero treatment 45min, it
The temper 1.5h under the conditions of 160 DEG C afterwards, comes out of the stove and is air-cooled to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810062446.5A CN108103286A (en) | 2018-01-23 | 2018-01-23 | A kind of heat treatment method of steel alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810062446.5A CN108103286A (en) | 2018-01-23 | 2018-01-23 | A kind of heat treatment method of steel alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108103286A true CN108103286A (en) | 2018-06-01 |
Family
ID=62219248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810062446.5A Withdrawn CN108103286A (en) | 2018-01-23 | 2018-01-23 | A kind of heat treatment method of steel alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108103286A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182692A (en) * | 2018-10-29 | 2019-01-11 | 苏州康索机电有限公司 | A kind of heat treatment process of low-alloy casting |
| CN113564516A (en) * | 2021-07-20 | 2021-10-29 | 龙岩市壹荣铸造有限公司 | Simplified heat treatment process for container corner fittings |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024870A (en) * | 2006-02-24 | 2007-08-29 | 南阳二机石油装备(集团)有限公司 | Low-temperature high-strength, high-toughness steel and preparing method therefor |
| CN101886165A (en) * | 2010-07-02 | 2010-11-17 | 镇江大力液压马达有限责任公司 | Heat treatment process for low-carbon multi-element alloy steel |
| CN102094112A (en) * | 2009-12-09 | 2011-06-15 | 宁波金汇精密铸造有限公司 | Heat treatment process of alloy steel product |
| CN103805753A (en) * | 2013-10-15 | 2014-05-21 | 刘强 | Low-carbon alloy steel heat treatment process |
| CN104611631A (en) * | 2013-11-04 | 2015-05-13 | 青岛飞宇航空科技有限公司 | Novel support material used for aircrafts |
-
2018
- 2018-01-23 CN CN201810062446.5A patent/CN108103286A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024870A (en) * | 2006-02-24 | 2007-08-29 | 南阳二机石油装备(集团)有限公司 | Low-temperature high-strength, high-toughness steel and preparing method therefor |
| CN102094112A (en) * | 2009-12-09 | 2011-06-15 | 宁波金汇精密铸造有限公司 | Heat treatment process of alloy steel product |
| CN101886165A (en) * | 2010-07-02 | 2010-11-17 | 镇江大力液压马达有限责任公司 | Heat treatment process for low-carbon multi-element alloy steel |
| CN103805753A (en) * | 2013-10-15 | 2014-05-21 | 刘强 | Low-carbon alloy steel heat treatment process |
| CN104611631A (en) * | 2013-11-04 | 2015-05-13 | 青岛飞宇航空科技有限公司 | Novel support material used for aircrafts |
Non-Patent Citations (1)
| Title |
|---|
| 于志中: "《钢材供销管理手册》", 31 August 1991, 北京经济学院出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182692A (en) * | 2018-10-29 | 2019-01-11 | 苏州康索机电有限公司 | A kind of heat treatment process of low-alloy casting |
| CN113564516A (en) * | 2021-07-20 | 2021-10-29 | 龙岩市壹荣铸造有限公司 | Simplified heat treatment process for container corner fittings |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102666897B (en) | High-toughness abrasion-resistant steel | |
| CN101509056B (en) | Thermal treatment method for precipitation hardening of martensitic stainless steel FV520B | |
| JPS59232220A (en) | Manufacture of high strength steel with superior resistance to sulfide corrosion cracking | |
| CN111455146B (en) | Strengthening and toughening treatment method for low-alloy martensitic steel and martensitic steel | |
| RU2010104452A (en) | Hardened martensitic steel with a low or zero content of cobalt, a method of manufacturing parts from this steel, and a component obtained by this method | |
| CN107858590B (en) | A kind of 42CrMo4 wind driven generator principal shaft control method | |
| CN111500832A (en) | Preparation process of alloy steel forge piece | |
| CN111057933B (en) | Manufacturing process of hot-work die steel for high-performance die-casting die | |
| CN108103286A (en) | A kind of heat treatment method of steel alloy | |
| CN105296876B (en) | High-strength fastener steel containing nickel and copper and thermal treatment method for high-strength fastener steel | |
| CN103572176B (en) | A kind of low-carbon martensitic steels and prepare the method for suspension ring | |
| CN107190130A (en) | A kind of engine shroud Technology for Heating Processing | |
| CN103147016B (en) | Low-temperature container steel at-110 ℃ and manufacturing method thereof | |
| CN104988295A (en) | Heat treatment method for improving medium-carbon non-quenched and tempered steel connecting rod cracking performance | |
| CN104099515B (en) | A kind of steel, its heat treatment steel formed and manufacture method thereof | |
| CN106929756B (en) | Bearing steel and preparation method thereof | |
| CN108504840A (en) | A kind of heat treatment process of high-strength high temperature-resistant alloy tool steel bit | |
| KR100957306B1 (en) | Forging steel using high frequency heat treatment and method for manufacturing the same | |
| CN103556093A (en) | Method for improving cold forming performance of GH4090 cold-rolled band | |
| KR101159999B1 (en) | Microalloy steel for 10 bolt, and method for producing the same | |
| CN105215241B (en) | Improve the forging technology of vehicle manual gearbox-gear gear steel billet metallographic structure | |
| CN115233089B (en) | Special steel for flexible gear and preparation process thereof | |
| CN118222943B (en) | Ultrahigh impact toughness hot rolled medium manganese steel and heat treatment method thereof | |
| CN107267723A (en) | A kind of Technology for Heating Processing of low alloy steel castings | |
| CN116287583B (en) | Niobium-containing hot working die steel 5CrNiMoV and heat treatment method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180601 |
|
| WW01 | Invention patent application withdrawn after publication |