CN109880986A - A kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy - Google Patents
A kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy Download PDFInfo
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Abstract
A kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy, is related to the rear technical field of heat treatment of increasing material manufacturing steel alloy.The invention aims to solve conventional laser increasing material manufacturing there are nonuniform organization, residual stress is difficult to eliminate the problem low with alloy strength.Method: one, the 12CrNi2 steel alloy that laser gain material manufactures heat temperature raising: is heated to 856 DEG C~866 DEG C；Two, it keeps the temperature: the 12CrNi2 steel alloy after heat temperature raising is subjected to isothermal holding under the conditions of 856 DEG C~866 DEG C；Three, cooling: by the 12CrNi2 steel alloy water cooling after heat preservation to room temperature；Four, 12CrNi2 steel alloy after cooling is heated to 734 DEG C~836 DEG C and carries out isothermal holding under the conditions of this temperature, then water cooling is to room temperature, the 12CrNi2 steel alloy that obtains that treated.The present invention can get a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy.
Description
Technical field
The present invention relates to the rear technical field of heat treatment of increasing material manufacturing steel alloy.
Background technique
Nuclear power Emergency diesel is the critical equipment that nuclear power system guarantees the smooth shutdown in power station in accident.As core
The core metal component of the standby carrying power transmission of Denso, traditional nuclear power Emergency diesel axis are forged by 12CrNi2 steel alloy.
Due to the problems such as conventional fabrication processes are long there are the period, material requirements is high and production process elaborate, and its harsh military service
Condition, to the design of its structure, material and manufacture, more stringent requirements are proposed.Conventionally manufactured process is the typical case based on forging technology
Subtract material manufacturing process, there are technical process it is cumbersome, stock utilization is low low with yield rate the problems such as.In view of the above problems, reducing
Research and development of products period, the structure for optimizing product and the performance for improving product are the important topics for being badly in need of carrying out.
Compared with domestic and international increases material manufacturing technology is in the increasing application in the fields such as Aeronautics and Astronautics and medical treatment, increase material system
Make the obvious lag of research and application in traditional industry field.On the one hand the reason is that, the high cost problem of current increasing material manufacturing
Development progress seriously is constrained, develops it towards the civilian industry field for considering economic benefit；Another aspect reason is into
The technical limitation of shape material itself and its technique.High-strength alloy steel is as the national economy such as machine-building and communications and transportation field
The industrial materials generallyd use, because its alloying level is high, solidifies and solid-state phase changes process complexity and heat treatment modification scope
Greatly, the technical maturity for increasing material manufacturing being carried out to it reaches far away titanium alloy manufacture level.Laser gain material manufactures alloy structure of steel
It is middle there are heterogeneous structures such as the solid solution of nonequilibrium freezing, alloy carbide, retained austenite and martensites, be easy to produce tissue
Stress.Meanwhile in forming process molten bath temperature gradient it is very big, cause larger thermal stress to generate.These two types of stress easily cause
There is phenomena such as deforming and cracking in component.Due in laser gain material manufacturing process ultra high temperature gradient, ultrafast cooling velocity this
One feature makes metal material frequently result in nonequilibrium metallurgy and along with biggish residual stress, comprehensive mechanical property
It is poor, and the standard of engineer application is not achieved in yield strength and tensile strength.
Summary of the invention
The invention aims to solve conventional laser increasing material manufacturing there are nonuniform organization, residual stress be difficult to eliminate and
The low problem of alloy strength, and a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy is provided.
A kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy, is completed by the following steps:
One, heat temperature raising: 12CrNi2 steel alloy is manufactured using cladding deposition materials, then 12CrNi2 steel alloy is heated to
856 DEG C~866 DEG C；
Two, it keeps the temperature: the 12CrNi2 steel alloy after heat temperature raising is subjected to isothermal holding under the conditions of 856 DEG C~866 DEG C；
Three, cooling: by the 12CrNi2 steel alloy water cooling after heat preservation to room temperature；
Four, intercritical hardening: 12CrNi2 steel alloy after cooling is heated to 734 DEG C~836 DEG C and under the conditions of this temperature
Isothermal holding, then water cooling are carried out to room temperature, the 12CrNi2 steel alloy that obtains that treated.
Cladding deposition materials described in step 1 is 12CrNi2 powder, the chemical component of 12CrNi2 powder percentage by weight
Content is C:0.08%~0.19%, Cr:0.7%~1%, Ni:1.4%~2.1%, Mn:0.2%~0.7%, Si:
0.14%~0.39%, surplus Fe, and oxygen concentration is 260ppm~290ppm in 12CrNi2 powder；
Using the 12CrNi2 steel alloy of cladding deposition materials manufacture described in step 1, manufactured using laser gain material；
12CrNi2 steel alloy described in step 1 with 10 DEG C/min~20 DEG C/min rate of heat addition be heated to 856 DEG C~
866℃。
The time that 12CrNi2 steel alloy described in step 2 carries out isothermal holding passes through τ1=α KD is calculated；
In formula, τ1For heating time, unit min；α is heating coefficient, and unit min/mm indicates that workpiece unit is effective
Heating time needed for thickness, between 1~1.5；K is shove charge correction factor, directly proportional to the size of batch；D is
The effective thickness of 12CrNi2 steel alloy, unit mm.
12CrNi2 steel alloy after cooling described in step 4 is heated to 10 DEG C/min~20 DEG C/min rate of heat addition
734 DEG C~836 DEG C；
The time that 12CrNi2 steel alloy described in step 4 carries out isothermal holding passes through τ2=α KD is calculated；
In formula, τ2For heating time, unit min；α is heating coefficient, and unit min/mm indicates that workpiece unit is effective
Heating time needed for thickness, between 1~1.5；K is shove charge correction factor, directly proportional to the size of batch；D is
The effective thickness of 12CrNi2 steel alloy, unit mm；
In treated described in step 4 12CrNi2 steel alloy martensite and ferritic mass ratio be 1:1.15~
1.2。
The principle of the present invention:
Heat-treating methods after being carried out to the 12CrNi2 steel alloy of laser gain material manufacture are as follows: quenching plus intercritical hardening processing.
Firstly, being quenched to 12CrNi2 steel alloy, 12CrNi2 steel alloy is heated to 20 DEG C higher than complete austenitizing temperature
~30 DEG C i.e. 856 DEG C~866 DEG C, water cooling, then will be after water cooling to room temperature after held for some time under the conditions of same temperature
12CrNi2 steel alloy is heated to carrying out intercritical hardening processing between Ac1~Ac3 temperature, after held for some time again water cooling to room
Temperature obtains the 12CrNi2 steel alloy between martensite and ferritic phase；
Wherein, the complete austenitizing temperature of 12CrNi2 steel alloy is 836 DEG C, the hypereutectoid steel of 12CrNi2 steel alloy
The temperature of Ac1 is 734 DEG C, and the temperature of the sub-eutectoid steel Ac3 of 12CrNi2 steel alloy is 836 DEG C.
Advantages of the present invention:
1. homogenizing tissue first with the complete austenitizing of quenching treatment before intercritical hardening processing, solves intercritical hardening
It is difficult to the drawbacks of homogenizing tissue；
2. intercritical hardening heating temperature is between Ac1 and Ac3, the ferrite for not completing austenitizing can be with tiny needle-shaped
Or thin blocky second phase is distributed in austenite crystal intergranular, plays dissection to the austenite grain of generation, hinders austenite
Crystal grain is grown up, to effectively refine the austenite grain of steel, the martensite obtained after quenching and ferrite crystal grain are more
It is tiny, play the role of refined crystalline strengthening；
3. the ferrite between being distributed in martensitic crystal grains, can while playing the role of the second-phase strength of massive aggregates type
To slow down the accumulation of martensite Dislocations, the strain for absorbing martensite can be reduced stress concentration, is formed and is extended to improve crackle
Drag；
4. compared to more traditional heat treatment mode, quenching plus intercritical hardening treated 12CrNi2 steel alloy are obtained
Tissue crystal grain it is more tiny, intensity is higher, than deposited state, quenching or quenching add-back fire treated 12CrNi2 steel alloy
Yield strength be respectively increased 48%, 4% and 7%, tensile strength has been respectively increased 49%, 5% and 15%.
The present invention can get a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy.
Detailed description of the invention
Fig. 1 is quenching+intercritical hardening heat treatment process schematic diagram that laser gain material manufactures a certain test specimen of 12CrNi2 steel；
Fig. 2 is the pattern under the SEM for the cladding deposition materials 12CrNi2 powder that laser gain material manufactures 12CrNi2 steel alloy
Figure；
Fig. 3 is the metallographic structure that laser gain material manufactures 12CrNi2 steel alloy deposited；
Fig. 4 is the metallographic structure for being quenched to 860 DEG C of heat preservation 20min；
Fig. 5 is the tissue being quenched under the SEM of 860 DEG C of heat preservation 20min；
Fig. 6 is the metallographic structure under quenching plus intercritical hardening processing；
Fig. 7 is the tissue under the SEM under quenching plus intercritical hardening processing；
Fig. 8 is the grain size under different heat treatment state；
Fig. 9 is the tissue accounting under 800 DEG C of intercritical hardening processing；
Figure 10 is the tensioning member fracture apperance under quenching plus intercritical hardening processing.
Specific embodiment
Specific embodiment 1: present embodiment is a kind of rear heat treatment side of laser gain material manufacture 12CrNi2 steel alloy
Method is specifically realized by the following steps:
One, heat temperature raising: 12CrNi2 steel alloy is manufactured using cladding deposition materials, then 12CrNi2 steel alloy is heated to
856 DEG C~866 DEG C；
Two, it keeps the temperature: the 12CrNi2 steel alloy after heat temperature raising is subjected to isothermal holding under the conditions of 856 DEG C~866 DEG C；
Three, cooling: by the 12CrNi2 steel alloy water cooling after heat preservation to room temperature；
Four, intercritical hardening: 12CrNi2 steel alloy after cooling is heated to 734 DEG C~836 DEG C and under the conditions of this temperature
Isothermal holding, then water cooling are carried out to room temperature, the 12CrNi2 steel alloy that obtains that treated.
The principle of present embodiment:
Heat-treating methods after being carried out to the 12CrNi2 steel alloy of laser gain material manufacture are as follows: quenching plus intercritical hardening processing.
Firstly, being quenched to 12CrNi2 steel alloy, 12CrNi2 steel alloy is heated to 20 DEG C higher than complete austenitizing temperature
~30 DEG C i.e. 856 DEG C~866 DEG C, water cooling, then will be after water cooling to room temperature after held for some time under the conditions of same temperature
12CrNi2 steel alloy is heated to carrying out intercritical hardening processing between Ac1~Ac3 temperature, after held for some time again water cooling to room
Temperature obtains the 12CrNi2 steel alloy between martensite and ferritic phase；
Wherein, the complete austenitizing temperature of 12CrNi2 steel alloy is 836 DEG C, the hypereutectoid steel of 12CrNi2 steel alloy
The temperature of Ac1 is 734 DEG C, and the temperature of the sub-eutectoid steel Ac3 of 12CrNi2 steel alloy is 836 DEG C.
The advantages of present embodiment:
1. homogenizing tissue first with the complete austenitizing of quenching treatment before intercritical hardening processing, solves intercritical hardening
It is difficult to the drawbacks of homogenizing tissue；
2. intercritical hardening heating temperature is between Ac1 and Ac3, the ferrite for not completing austenitizing can be with tiny needle-shaped
Or thin blocky second phase is distributed in austenite crystal intergranular, plays dissection to the austenite grain of generation, hinders austenite
Crystal grain is grown up, to effectively refine the austenite grain of steel, the martensite obtained after quenching and ferrite crystal grain are more
It is tiny, play the role of refined crystalline strengthening；
3. the ferrite between being distributed in martensitic crystal grains, can while playing the role of the second-phase strength of massive aggregates type
To slow down the accumulation of martensite Dislocations, the strain for absorbing martensite can be reduced stress concentration, is formed and is extended to improve crackle
Drag；
4. compared to more traditional heat treatment mode, quenching plus intercritical hardening treated 12CrNi2 steel alloy are obtained
Tissue crystal grain it is more tiny, intensity is higher, than deposited state, quenching or quenching add-back fire treated 12CrNi2 steel alloy
Yield strength be respectively increased 48%, 4% and 7%, tensile strength has been respectively increased 49%, 5% and 15%.
Specific embodiment 2: the differences between this implementation mode and the specific implementation mode are that: cladding described in step 1 is heavy
Product material is 12CrNi2 powder, and the chemical component of 12CrNi2 powder percentage composition by weight is C:0.08%~0.19%, Cr:
0.7%~1%, Ni:1.4%~2.1%, Mn:0.2%~0.7%, Si:0.14%~0.39%, surplus are
Fe, and oxygen concentration is 260ppm~290ppm in 12CrNi2 powder.Other steps are same as the specific embodiment one.
Specific embodiment 3: present embodiment is with specific embodiment one or two differences: benefit described in step 1
The 12CrNi2 steel alloy manufactured with cladding deposition materials, is manufactured using laser gain material.Other steps and specific embodiment one or
Two is identical.
Specific embodiment 4: one of present embodiment and specific embodiment one to three difference are: will be in step 1
The 12CrNi2 steel alloy is heated to 861 DEG C.Other steps are identical as specific embodiment one to three.
Specific embodiment 5: one of present embodiment and specific embodiment one to four difference are: institute in step 1
It states 12CrNi2 steel alloy and is heated to 856 DEG C~866 DEG C with 10 DEG C/min~20 DEG C/min rate of heat addition.Other steps and tool
Body embodiment one to four is identical.
Specific embodiment 6: one of present embodiment and specific embodiment one to five difference are: institute in step 2
The time that the 12CrNi2 steel alloy stated carries out isothermal holding passes through τ1=α KD is calculated；
In formula, τ1For heating time, unit min；α is heating coefficient, and unit min/mm indicates that workpiece unit is effective
Heating time needed for thickness, between 1~1.5；K is shove charge correction factor, directly proportional to the size of batch；D is
The effective thickness of 12CrNi2 steel alloy, unit mm.Other steps are identical as specific embodiment one to five.
Specific embodiment 7: one of present embodiment and specific embodiment one to six difference are: will be in step 4
The 12CrNi2 steel alloy is heated to 785 DEG C.Other steps are identical as specific embodiment one to six.
Specific embodiment 8: one of present embodiment and specific embodiment one to seven difference are: institute in step 4
It states 12CrNi2 steel alloy after cooling and is heated to 734 DEG C~836 DEG C with 10 DEG C/min~20 DEG C/min rate of heat addition.Other
Step is identical as specific embodiment one to seven.
Specific embodiment 9: one of present embodiment and specific embodiment one to eight difference are: institute in step 4
The time that the 12CrNi2 steel alloy stated carries out isothermal holding passes through τ2=α KD is calculated；
In formula, τ2For heating time, unit min；α is heating coefficient, and unit min/mm indicates that workpiece unit is effective
Heating time needed for thickness, between 1~1.5；K is shove charge correction factor, directly proportional to the size of batch；D is
The effective thickness of 12CrNi2 steel alloy, unit mm.Other steps are identical as specific embodiment one to eight.
Specific embodiment 10: one of present embodiment and specific embodiment one to nine difference are: institute in step 4
Martensite and ferritic mass ratio are 1:1.15~1.2 in 12CrNi2 steel alloy of stating that treated.Other steps and specific
Embodiment one to nine is identical.
Beneficial effects of the present invention are verified using following embodiment:
Embodiment one: a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy, specifically according to the following steps
It completes:
One, heat temperature raising: using cladding deposition materials using laser gain material manufacture 12CrNi2 steel alloy, then with 15 DEG C/
12CrNi2 steel alloy is heated to 860 DEG C by the rate of heat addition of min；
Two, it keeps the temperature: the 12CrNi2 steel alloy after heat temperature raising is subjected to isothermal holding, soaking time under the conditions of 860 DEG C
20min keeps its internal and external temperature completely the same, structural constituent full and uniformization；
Three, cooling: by the 12CrNi2 steel alloy water cooling after heat preservation to room temperature；
Four, intercritical hardening: being heated to 800 DEG C for 12CrNi2 steel alloy after cooling with the rate of heat addition of 16 DEG C/min, and
Keep the temperature 20min under the conditions of this temperature, then water cooling is to room temperature, the 12CrNi2 steel alloy that obtains that treated；
The cladding deposition materials that laser gain material manufactures 12CrNi2 steel alloy are 12CrNi2 powder, and the chemical component of powder is pressed
Weight percentage is, the oxygen concentration of powder is 288ppm, C:0.13%, Cr:0.84%, Ni:1.68%, Mn:0.49%,
Si:0.34%, surplus Fe；
In 12CrNi2 steel alloy after heat treatment, martensite and ferritic mass percent are 1:1.17.
Metallographic structure in attached drawing is obtained in GX71 inversion type optical microphotograph under the microscope, using Merlin Compact
Model scanning electron microscope, HELIOS NanoLab 600i model scanning electron microscope carry out microstructure observation to sample.
Fig. 1 is that the quenching of laser gain material manufacture one test specimen of 12CrNi2 steel alloy adds intercritical hardening heat treatment process schematic diagram,
Hardening heat is 860 DEG C, and soaking time uses 20min, and intercritical hardening temperature is 800 DEG C, and soaking time uses 20min.
Fig. 3 be laser gain material manufacture 12CrNi2 steel alloy deposited metallographic structure, show band-like feature, this be by
Caused nonuniform organization causes in the increasing material manufacturing the characteristics of.
Fig. 4 is to obtain test specimen band-like feature under metallographic microscope after being quenched to completely disappear, therefore, it is considered that completely difficult to understand
Family name's bodyization can eliminate the inhomogeneities of increasing material manufacturing tissue.
In Fig. 5, it can be seen that quenched tissue is lath martensite, does not observe that carbide exists, all molten
In martensite, it is also observed that being mingled with bulk that a small amount of tiny recess is gone down and strip in lath martensite tissue not
Molten ferrite.
In Fig. 6 and Fig. 7, it can be seen that obtained crystal grain tiny martensite and ferrite after quenching plus intercritical hardening processing
Tissue, ferrite crystal grain are surrounded by martensitic crystal grains.
Fig. 8 is deposited, and the grain size figure of quenching state and 800 DEG C of intercritical hardening states, Fig. 7 is 800 DEG C of intercritical hardenings
Martensite and ferrite crystal grain accounting, it can be seen that crystal grain refinement is the half of quenching state after intercritical hardening processing, this is because
Having the martensitic crystal grains close to half to become ferrite causes.
Fig. 9 is the martensite and ferrite crystal grain accounting of 780 DEG C of intercritical hardenings, and black portions are martensite, remaining is iron
Ferritic, martensite accounting 46%, ferrite accounting 54%, it can be seen that average grain size is after 780 DEG C of intercritical hardening processing
3.27 μm, it is refined as the half of quenching state (6.64 μm), is led this is because there are the martensitic crystal grains close to half to become ferrite
It causes.
Figure 10 is tensioning member fracture apperance figure, it can be seen that the fracture mode of test specimen is all after quenching+intercritical hardening processing
Ductile rupture.
Embodiment two: a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy, specifically according to the following steps
It completes:
One, heat temperature raising: using cladding deposition materials using laser gain material manufacture 12CrNi2 steel alloy, then with 17 DEG C/
12CrNi2 steel alloy is heated to 866 DEG C by the rate of heat addition of min；
Two, it keeps the temperature: the 12CrNi2 steel alloy after heat temperature raising is subjected to isothermal holding, soaking time under the conditions of 866 DEG C
27min keeps its internal and external temperature completely the same, structural constituent full and uniformization；
Three, cooling: by the 12CrNi2 steel alloy water cooling after heat preservation to room temperature；
Four, intercritical hardening: being heated to 836 DEG C for 12CrNi2 steel alloy after cooling with the rate of heat addition of 18 DEG C/min, and
Keep the temperature 20min under the conditions of this temperature, then water cooling is to room temperature, the 12CrNi2 steel alloy that obtains that treated；
The cladding deposition materials that laser gain material manufactures 12CrNi2 steel alloy are 12CrNi2 powder, and the chemical component of powder is pressed
Weight percentage is, the oxygen concentration of powder is 278ppm, C:0.15%, Cr:0.89%, Ni:1.81%, Mn:0.44%,
Si:0.37%, surplus Fe；
In 12CrNi2 steel alloy after heat treatment, martensite and ferritic mass percent are 1:1.16.
Table 1:
Table 1 is the comparison of deposited, quenching state and quenching+tempering and embodiment one, two；
Wherein, quenching state is that water cooling obtains after 12CrNi2 steel alloy is kept the temperature 20min at 860 DEG C；Quenching+tempering is
By the 12CrNi2 steel alloy after quenching treatment, it is transferred in tempering furnace and is heated to 400 DEG C~430 DEG C or so, heat preservation is about
It is taken out after 50min~70min and is air-cooled to room temperature, quenching is returned in this experiment to be heated to water cooling after 860 DEG C of heat preservation 20min
Fire is air-cooled to room temperature after keeping the temperature 1h for obtained quenching state test specimen to be tempered at 400 DEG C；Embodiment is first is that 12CrNi2 is closed
Jin Gang water cooling after 866 DEG C of heat preservation 20min, obtained quenching state test specimen are heated to 800 DEG C, and water cooling etc. obtains after heat preservation 20min
It arrives；Embodiment is second is that water cooling, obtained quenching state test specimen are heated to after 866 DEG C of heat preservation 27min by 12CrNi2 steel alloy
836 DEG C, water cooling etc. obtains after keeping the temperature 20min；Comparison quenching and deposited can see the intensity after quenching treatment and substantially mention
High but elongation percentage drops to 14.94%, and plasticity and toughness are poor.Comparison quenching and quenching+tempering processing are it can be seen that pass through tempering
Tensile strength has dropped about 100MPa afterwards, and elongation percentage is improved to 17.63%, and the tempering embodied at this temperature is slightly dropping
The plasticity and toughness of test specimen can be effectively improved under the conditions of low intensive.Two groups of comparative example one and quenching can see, and the temperature is sub-
After temperature quenching treatment, test piece intensity is not only slightly higher than quenching state, and elongation percentage is also promoted to 17.09%.It comparative example two and quenches
Two groups of fire+tempering can see intercritical hardening for tempering, and strength enhancing 17.66%, elongation percentage only reduces by 3.5%.
It can be seen that quenching+intercritical hardening can obtain preferably elongation percentage and very high intensity.
Claims (10)
1. a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy, it is characterised in that it is complete according to the following steps
At:
One, heat temperature raising: 12CrNi2 steel alloy is manufactured using cladding deposition materials, then 12CrNi2 steel alloy is heated to 856
DEG C~866 DEG C；
Two, it keeps the temperature: the 12CrNi2 steel alloy after heat temperature raising is subjected to isothermal holding under the conditions of 856 DEG C~866 DEG C；
Three, cooling: by the 12CrNi2 steel alloy water cooling after heat preservation to room temperature；
Four, intercritical hardening: 12CrNi2 steel alloy after cooling is heated to 734 DEG C~836 DEG C and is carried out under the conditions of this temperature
Isothermal holding, then water cooling is to room temperature, the 12CrNi2 steel alloy that obtains that treated.
2. a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy according to claim 1, feature exist
The cladding deposition materials described in step 1 are 12CrNi2 powder, and the chemical component of 12CrNi2 powder percentage composition by weight is
C:0.08%~0.19%, Cr:0.7%~1%, Ni:1.4%~2.1%, Mn:0.2%~0.7%, Si:0.14%~
0.39%, surplus Fe, and oxygen concentration is 260ppm~290ppm in 12CrNi2 powder.
3. a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy according to claim 1, feature exist
Using the 12CrNi2 steel alloy of cladding deposition materials manufacture described in the step 1, manufactured using laser gain material.
4. a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy according to claim 1, feature exist
In 12CrNi2 steel alloy described in step 1 is heated to 861 DEG C.
5. a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy according to claim 1, feature exist
The 12CrNi2 steel alloy described in step 1 is heated to 856 DEG C~866 DEG C with 10 DEG C/min~20 DEG C/min rate of heat addition.
6. a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy according to claim 1, feature exist
The time that 12CrNi2 steel alloy carries out isothermal holding in step 2 passes through τ1=α KD is calculated；
In formula, τ1For heating time, unit min；α is heating coefficient, unit min/mm；K is shove charge correction factor；D is
The effective thickness of 12CrNi2 steel alloy, unit mm.
7. a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy according to claim 1, feature exist
In 12CrNi2 steel alloy described in step 4 is heated to 785 DEG C.
8. a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy according to claim 1, feature exist
The 12CrNi2 steel alloy after cooling described in the step 4 is heated to 734 DEG C with 10 DEG C/min~20 DEG C/min rate of heat addition
~836 DEG C.
9. a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy according to claim 1, feature exist
The time that 12CrNi2 steel alloy carries out isothermal holding in step 4 passes through τ2=α KD is calculated；
In formula, τ2For heating time, unit min；α is heating coefficient, unit min/mm；K is shove charge correction factor；D is
The effective thickness of 12CrNi2 steel alloy, unit mm.
10. a kind of rear heat treatment method of laser gain material manufacture 12CrNi2 steel alloy according to claim 1, feature
Martensite and ferritic mass ratio are 1:1.15~1.2 in the 12CrNi2 steel alloy that is described in step 4 that treated.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112553416A (en) * | 2019-09-25 | 2021-03-26 | 中国科学院金属研究所 | Heat treatment method for improving isothermal quenching structure strength of laser melting deposition 12CrNi2 alloy steel |
| CN112719296A (en) * | 2020-12-29 | 2021-04-30 | 中国人民解放军陆军装甲兵学院 | Method for regulating and controlling mechanical properties of 4Cr5MoSiV1 alloy steel |
| CN112760457A (en) * | 2019-10-21 | 2021-05-07 | 中国科学院金属研究所 | Heat treatment method for improving laser melting deposition 12CrNi2 alloy steel product of strength and elongation |
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| JPS58100623A (en) * | 1981-12-11 | 1983-06-15 | Kawasaki Steel Corp | Production of high strength steel |
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| CN108480642A (en) * | 2018-05-22 | 2018-09-04 | 东北大学 | A kind of hot isostatic pressing and heat treatment method of laser gain material manufacture 12CrNi2 high performance alloys steel |
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2019
- 2019-03-20 CN CN201910214575.6A patent/CN109880986B/en not_active Expired - Fee Related
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| JPS58100623A (en) * | 1981-12-11 | 1983-06-15 | Kawasaki Steel Corp | Production of high strength steel |
| CN101880831A (en) * | 2010-06-13 | 2010-11-10 | 东北大学 | High-strength-and-toughness low alloy wear resistant steel and manufacturing method thereof |
| CN108480642A (en) * | 2018-05-22 | 2018-09-04 | 东北大学 | A kind of hot isostatic pressing and heat treatment method of laser gain material manufacture 12CrNi2 high performance alloys steel |
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| Z.DONG ETC: "Effect of powder oxygen content on microstructure and mechanical properties of a laser additively-manufactured 12CrNi2 alloy steel", 《MATERIALS LETTERS》 * |
| 王传雅主编: "《钢的亚温处理-临界区双相组织超细化强韧化理论及工艺》", 30 June 2003, 中国铁道出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112553416A (en) * | 2019-09-25 | 2021-03-26 | 中国科学院金属研究所 | Heat treatment method for improving isothermal quenching structure strength of laser melting deposition 12CrNi2 alloy steel |
| CN112553416B (en) * | 2019-09-25 | 2021-09-24 | 中国科学院金属研究所 | Heat treatment method for improving isothermal quenching structure strength of laser melting deposition 12CrNi2 alloy steel |
| CN112760457A (en) * | 2019-10-21 | 2021-05-07 | 中国科学院金属研究所 | Heat treatment method for improving laser melting deposition 12CrNi2 alloy steel product of strength and elongation |
| CN112760457B (en) * | 2019-10-21 | 2022-05-31 | 中国科学院金属研究所 | Heat treatment method for improving laser melting deposition 12CrNi2 alloy steel product of strength and elongation |
| CN112719296A (en) * | 2020-12-29 | 2021-04-30 | 中国人民解放军陆军装甲兵学院 | Method for regulating and controlling mechanical properties of 4Cr5MoSiV1 alloy steel |
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| CN109880986B (en) | 2021-03-02 |
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