CN108504928B - Martensitic heat-resistant steel alloy powder and method for laser additive manufacturing by using same - Google Patents
Martensitic heat-resistant steel alloy powder and method for laser additive manufacturing by using same Download PDFInfo
- Publication number
- CN108504928B CN108504928B CN201810397799.0A CN201810397799A CN108504928B CN 108504928 B CN108504928 B CN 108504928B CN 201810397799 A CN201810397799 A CN 201810397799A CN 108504928 B CN108504928 B CN 108504928B
- Authority
- CN
- China
- Prior art keywords
- metal
- alloy powder
- additive manufacturing
- resistant steel
- cerium
- 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.)
- Active
Links
- 239000000843 powder Substances 0.000 title claims abstract description 78
- 229910000734 martensite Inorganic materials 0.000 title claims abstract description 41
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000654 additive Substances 0.000 title claims abstract description 28
- 230000000996 additive effect Effects 0.000 title claims abstract description 28
- 239000000956 alloy Substances 0.000 claims abstract description 39
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 38
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 29
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 29
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 29
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 19
- 239000010937 tungsten Substances 0.000 claims abstract description 19
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 18
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 239000010703 silicon Substances 0.000 claims abstract description 17
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 17
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- 238000003723 Smelting Methods 0.000 claims abstract description 14
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 14
- 239000011733 molybdenum Substances 0.000 claims abstract description 14
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- 239000011651 chromium Substances 0.000 claims abstract description 11
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000011572 manganese Substances 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 54
- 239000002184 metal Substances 0.000 claims description 54
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 16
- 238000000137 annealing Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- 229910052786 argon Inorganic materials 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 8
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000008021 deposition Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000009689 gas atomisation Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 10
- 239000002893 slag Substances 0.000 abstract description 5
- 238000007873 sieving Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001068 laves phase Inorganic materials 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- DBIMSKIDWWYXJV-UHFFFAOYSA-L [dibutyl(trifluoromethylsulfonyloxy)stannyl] trifluoromethanesulfonate Chemical compound CCCC[Sn](CCCC)(OS(=O)(=O)C(F)(F)F)OS(=O)(=O)C(F)(F)F DBIMSKIDWWYXJV-UHFFFAOYSA-L 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/64—Treatment of workpieces or articles after build-up by thermal means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention relates to novel martensite heat-resistant steel alloy powder and a method for laser additive manufacturing of a complex flow channel structure by using the same, wherein the novel martensite heat-resistant steel alloy powder comprises the following components in percentage by weight: 0.05-0.15% of carbon; 0.1-0.4% of silicon; 0.3-0.6% of manganese; 8.0-12.0% of chromium; 1.5-1.9% of tungsten; 0.1-0.8% of molybdenum; 0.1-0.3% of vanadium; 0.1-0.3% of tantalum; a% of lanthanum; b% of cerium; the balance being iron; the novel martensite heat-resistant steel alloy powder for laser additive manufacturing has excellent forming process performance, the formed structure of laser additive manufacturing is a martensite + carbide structure, crystal grains are fine and uniform, and the columnar crystal structure form is avoided; the lanthanum and cerium are added into the alloy powder, so that the alloy powder can be deoxidized in an alloy smelting furnace, and the residual lanthanum and cerium can continuously play roles in deoxidizing and slagging in a micro smelting pool in the additive manufacturing process by controlling the content of the lanthanum and cerium, thereby ensuring that alloy elements are not oxidized and avoiding forming oxide slag inclusion.
Description
Technical Field
The invention relates to the technical field of alloy powder, in particular to novel martensite heat-resistant steel alloy powder and a method for laser additive manufacturing of a complex flow channel structure by using the same.
Background
At present, parts with complex runner structures are generally produced and prepared by casting or machining and assembling methods, but for some variable cross-section runners with abnormal and complex shapes, the casting and machining methods are difficult to produce, the performance of casting structures is poor, and the high-temperature service requirements cannot be met, the machining and assembling are mainly carried out by welding, and similar as-cast weld structures also exist. In summary, the conventional casting and machining can not produce high-quality and high-performance heat-resistant alloy material parts with complex runner structures, so that a laser additive manufacturing method is proposed to prepare the complex runner structures, and due to the limitation of additive manufacturing process characteristics on materials, the conventional alloy system can not meet the requirements of formability and manufacturability, and the alloy system needs to be subjected to component optimization design.
Disclosure of Invention
The invention provides novel martensite heat-resistant steel alloy powder, which can be deoxidized in an alloy smelting furnace by adding lanthanum and cerium, controls the oxygen content in the alloy powder, and simultaneously can continuously play roles of deoxidizing and slagging in a micro smelting pool in the additive manufacturing process by controlling the contents of lanthanum and cerium, thereby ensuring that alloy elements are not oxidized and avoiding forming oxide slag inclusion.
In order to achieve the purpose, the invention adopts the technical scheme that: a novel martensitic heat resistant steel alloy powder comprising, in weight percent:
0.05-0.15% of carbon;
0.1-0.4% of silicon;
0.3-0.6% of manganese;
8.0-12.0% of chromium;
1.5-1.9% of tungsten;
0.1-0.8% of molybdenum;
0.1-0.3% of vanadium;
0.1-0.3% of tantalum;
a% of lanthanum;
b% of cerium;
the balance being iron;
wherein A is more than or equal to 0, B is more than or equal to 0, and A + B is more than or equal to 0.05 and less than or equal to 0.3.
Further, A is more than or equal to 0 and less than or equal to 0.3, and B is more than or equal to 0 and less than or equal to 0.3.
The invention also provides a method for carrying out laser additive manufacturing on a complex flow channel structure by adopting the novel martensite heat-resistant steel alloy powder, which comprises the following steps:
(1) establishing a three-dimensional model according to a formed part, carrying out slice layering on the three-dimensional model by using image layering software, and carrying out forming path design by using path planning software;
(2) feeding the novel martensite heat-resistant steel alloy powder to the surface of the base material, scanning the novel martensite heat-resistant steel alloy powder on the base material by a laser beam of a laser according to a laser scanning path of a current layer to melt the novel martensite heat-resistant steel alloy powder, and introducing inert gas to protect a molten pool;
(3) and sequentially finishing the deposition of all the layers, and carrying out surface cleaning and stress relief annealing treatment to obtain the required formed part.
Further, in the step (3), the introduced inert gas is argon, and the purity of the argon is more than or equal to 99.99%.
Further, in the step (2) and the step (3), the laser power is 800-1000W, the scanning speed is 6-10 mm/s, the defocusing amount is 3mm, and the powder feeding speed is 8-12 g/min.
Further, the granularity of the alloy powder is 150-350 meshes.
Furthermore, in the step (1), the height of each layer is 0.02-0.1 mm.
Further, the annealing process in the step (3) is carried out for 1-2 hours at 750 ℃.
After adopting the technical scheme, compared with the prior art, the invention has the following advantages: the novel martensite heat-resistant steel alloy powder for laser additive manufacturing has excellent forming process performance, the structure formed by laser additive manufacturing is a martensite + carbide structure, crystal grains are fine and uniform, and no columnar crystal structure form exists; because the lanthanum and the cerium are added into the alloy powder, the alloy powder can be deoxidized in an alloy smelting furnace, the oxygen content in the alloy powder is controlled, and meanwhile, the residual lanthanum and cerium can continuously play roles of deoxidizing and slagging in a micro smelting pool in the additive manufacturing process by controlling the content of the lanthanum and the cerium, so that the alloy elements are prevented from being oxidized, and oxide slag inclusion is avoided.
Drawings
FIG. 1 is a metallographic structure obtained in example 1 of the present invention;
FIG. 2 is a metallographic structure diagram obtained in example 2 of the present invention;
FIG. 3 is a metallographic structure diagram obtained in example 3 of the present invention.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
As shown in fig. 1 to 3, the present invention provides a novel martensitic heat-resistant steel alloy powder, comprising, in weight percent: 0.05-0.15% of carbon; 0.1-0.4% of silicon; 0.3-0.6% of manganese; 8.0-12.0% of chromium; 1.5-1.9% of tungsten; 0.1-0.8% of molybdenum; 0.1-0.3% of vanadium; 0.1-0.3% of tantalum; a% of lanthanum; b% of cerium; the balance being iron; wherein A is more than or equal to 0, B is more than or equal to 0, and A + B is more than or equal to 0.05 and less than or equal to 0.3.
Preferably, 0.05. ltoreq. A.ltoreq.0.3 and 0.05. ltoreq. B.ltoreq.0.3.
The novel martensite heat-resistant steel alloy powder is prepared by adopting a method of smelting in a medium-frequency induction furnace and then atomizing, and comprises the following steps: burdening → smelting → vacuum atomization → drying → sieving.
The method comprises the following specific steps:
(1) preparing materials: the method is characterized in that metal manganese, metal chromium, metal tungsten, metal molybdenum, metal vanadium, metal iron, carbon blocks, raw material silicon, metal tantalum, metal lanthanum and metal cerium are used as raw materials and are proportioned according to target components.
(2) Smelting:
(2.1) adding the prepared metal manganese, metal chromium, metal tungsten, metal molybdenum, metal vanadium and metal iron into a medium-frequency induction furnace, electrifying and heating to melt the metal manganese, the metal chromium, the metal tungsten, the metal molybdenum, the metal vanadium and the metal iron, and taking the carbon block, the raw material silicon, the metal tantalum, the metal lanthanum and the metal cerium as supplementary materials.
(2.2) sequentially adding the prepared carbon block, the raw material silicon and the metal tantalum into the molten alloy solution.
And (2.3) adding metal lanthanum and metal cerium to perform deoxidation treatment, wherein the time of the deoxidation treatment is 1-2 min.
(2.4) discharging after the components are adjusted to be qualified in front of the furnace, wherein the discharging temperature is 1450-1500 ℃.
Preferably, the temperature in the medium-frequency induction furnace is controlled to be 1500-1550 ℃ when the supplementary materials are added.
(3) Vacuum gas atomization: atomizing the alloy melt finally obtained in the step (2), wherein the atomizing medium is argon, and the atomizing pressure is 2-10 MPa.
(4) And (3) drying: a far infrared dryer is adopted, and the drying temperature is 200-250 ℃.
(5) Screening: and sieving powder with the granularity range of 150-350 meshes by using a powder sieving machine to obtain finished powder, namely the required novel martensite heat-resistant steel alloy powder.
The raw materials used in the present invention are commercially available, without limitation, and the sources thereof are not limited.
The components of the novel martensite heat-resistant steel alloy powder prepared by the steps are tested by adopting the standard of GB/T223 chemical analysis method for steel and alloy, and the detection result comprises the following components in percentage by weight: 0.05-0.15% of carbon; 0.1-0.4% of silicon; 0.3-0.6% of manganese; 8.0-12.0% of chromium; 1.5-1.9% of tungsten; 0.1-0.8% of molybdenum; 0.1-0.3% of vanadium; 0.1-0.3% of tantalum; lanthanum and cerium are more than or equal to 0.05 and less than or equal to 0.3B percent; the balance being iron.
After cooling the novel martensite heat-resistant steel alloy powder to room temperature, manufacturing a part with a complex flow channel structure by adopting a laser additive manufacturing method, wherein the steps are as follows:
(1) establishing a three-dimensional model according to a formed part, slicing and layering the three-dimensional model by using image layering software, wherein the height of each layer is 0.02-0.1 mm, and designing a forming path by using path planning software.
(2) And feeding the novel martensite heat-resistant steel alloy powder to the surface of the base material, scanning the novel martensite heat-resistant steel alloy powder on the base material by a laser beam of a laser according to a laser scanning path of the current layer to melt the novel martensite heat-resistant steel alloy powder, and introducing inert gas to protect a molten pool.
Preferably, the laser power is 800-1000W, the scanning speed is 6-10 mm/s, the defocusing amount is 3mm, and the powder feeding rate is 8-12 g/min; the inert gas is argon, and the purity of the inert gas is more than or equal to 99.99 percent.
(3) And sequentially finishing the deposition of all the layers, and carrying out surface cleaning and stress relief annealing treatment to obtain the required formed part.
Wherein, the annealing process is to keep the temperature at 750 ℃ for 1-2 h, and the annealing process has the following functions: the residual stress is eliminated, the high temperature stability of the structure of the laser rapid solidification non-equilibrium structure is improved, and the parts can be directly used at high temperature.
The formed part is sliced, ground, polished and corroded, and then metallographic structure observation is carried out, so that the formed part is seen to be compact in structure, fine and uniform in crystal grains and free of columnar crystal structure morphology, and the formed structure is a martensite + carbide structure.
The effects of each element in the novel martensite heat-resistant steel alloy powder are as follows:
(1) silicon element: the method is mainly used for improving the forming manufacturability of the alloy powder.
(2) Manganese element: reduction of A1Point, promote M6C is precipitated.
(3) Chromium element: the chromium is used for ensuring corrosion resistance and high-temperature oxidation resistance, and is a ferrite forming element at the same time, so that a martensite structure can be obtained after quenching to improve the mechanical property.
(4) Tungsten element: is an important element influencing the strength and ductile-brittle transition temperature DBTT of the heat-resistant steel, and under the condition of ensuring the required high-temperature strength, the tungsten can promote the precipitation of a large amount of Laves phases to obviously deteriorate the toughness, so the tungsten content also needs to be controlled to reduce the possibility of the precipitation of the Laves phases in the forming process as much as possible.
(5) Molybdenum element: by precipitation of M6C is used for improving the high-temperature strength, and meanwhile, molybdenum can play a role in solid solution strengthening and prevents austenite grains from growing in a mode of influencing diffusion.
(6) Vanadium element and tantalum element: the fine and dispersed carbide particles play a role in pinning dislocations and can improve mechanical properties and high-temperature creep properties.
(7) Lanthanum element and cerium element: the alloy powder deoxidizing agent is used for deoxidizing when being used for an alloy smelting furnace, is used for controlling the oxygen content in alloy powder, and meanwhile, residual rare earth lanthanum and residual rare earth cerium can continuously play roles of deoxidizing and slagging in a micro smelting pool in the additive manufacturing process, so that other alloy elements are prevented from being oxidized, and oxide slag inclusion is avoided.
The following are preferred embodiments:
example 1
The material is prepared according to the following proportion, by weight, 0.07% of carbon, 0.2% of silicon, 0.5% of manganese, 8.0% of chromium, 1.5% of tungsten, 0.4% of molybdenum, 0.15% of vanadium, 0.15% of tantalum, 0.1% of lanthanum and 0.2% of cerium, and the balance of iron.
Adding the prepared manganese metal, chromium metal, tungsten metal, molybdenum metal, vanadium metal and iron metal into a medium-frequency induction furnace, electrifying and heating to melt the manganese metal, chromium metal, tungsten metal, molybdenum metal, vanadium metal and iron metal, adding the carbon block, the raw material silicon, tantalum metal, lanthanum metal and cerium metal as supplementary materials, and controlling the temperature in the medium-frequency induction furnace to 1520 ℃ when the supplementary materials are added. And sequentially adding the prepared carbon block, the raw material silicon and the metal tantalum into the molten alloy solution. And (3) adding metal lanthanum and metal cerium to perform deoxidation treatment, wherein the time of the deoxidation treatment is 1 min. And discharging after the components are adjusted to be qualified in front of the furnace, wherein the discharging temperature is 1460 ℃. And atomizing the alloy melt to prepare alloy powder, wherein the atomizing medium is argon, and the atomizing pressure is 4 MPa. And drying the alloy powder by adopting a far infrared dryer at the drying temperature of 210 ℃. Then the powder with the granularity range of 100 meshes to 350 meshes is sieved out by a powder sieving machine to be used as finished powder.
After cooling the finished powder to room temperature, manufacturing the parts with the complex flow channel structure by adopting a laser additive manufacturing method, which comprises the following specific steps: establishing a three-dimensional model according to a formed part, carrying out slicing layering on the three-dimensional model by using image layering software, wherein the height of each layer is 0.02mm, and carrying out forming path design by using path planning software. The novel martensite heat-resistant steel alloy powder is fed into the surface of the base material, the laser beam of the laser scans the novel martensite heat-resistant steel alloy powder on the base material according to the laser scanning path of the current layer to melt the novel martensite heat-resistant steel alloy powder, the laser power is 800w, the scanning speed is 6mm/s, the defocusing amount is 3mm, and the powder feeding speed is 8 g/min. Meanwhile, argon is introduced to protect the molten pool, and the purity of the argon is more than or equal to 99.99 percent. Sequentially finishing the deposition of all layers, and performing surface cleaning and stress relief annealing treatment, wherein the process parameters of the stress relief annealing treatment are as follows: and (4) preserving heat for 1h at 750 ℃ to obtain the required forming part with the complex runner structure.
The molded part obtained by the method is sliced, ground, polished and corroded, and then metallographic structure observation is carried out, and the obtained metallographic structure picture is shown in figure 1, as can be seen from figure 1, the part prepared in the embodiment 1 of the invention has a compact structure, fine and uniform crystal grains and no columnar crystal structure form, and the formed structure is a martensite + carbide structure.
The parts prepared in example 1 of the present invention were sampled and tested for mechanical properties, and the test results are shown in table 1. Table 1 shows the composition of the novel martensitic heat-resistant steel alloy powder and the mechanical property test results of the complex flow channel structure obtained according to various embodiments of the present invention.
Example 2
A component part of a complex flow channel structure was prepared as described in example 1, except that this example was formulated with the following target compositions, in weight percent, including 0.11% carbon, 0.4% silicon, 0.5% manganese, 9.1% chromium, 1.5% tungsten, 0.5% molybdenum, 0.2% vanadium, 0.15% tantalum, 0.1% lanthanum, and 0.1% cerium, with the balance being iron. In the preparation process of the novel martensite heat-resistant steel alloy powder, the temperature in the medium-frequency induction furnace is controlled at 1500 ℃, the tapping temperature is 1450 ℃, the atomization pressure is 6MPa, and the drying temperature of the far infrared dryer is 230 ℃ when the supplementary materials are added. Then the powder with the granularity range of 100 meshes to 350 meshes is sieved out by a powder sieving machine to be used as finished powder. The finished powder is made into parts with complex flow channel structures by adopting a laser additive manufacturing method, the height of each layer is 0.06mm, the laser power is 900w, the scanning speed is 6mm/s, the defocusing amount is 3mm, and the powder feeding speed is 10 g/min. The technological parameters of the stress relief annealing treatment are as follows: the temperature is kept at 750 ℃ for 1.5h, and the attached figure 2 is a metallographic structure picture of the part with the complex runner structure, which is prepared in the embodiment 2 of the invention.
The parts prepared in example 2 of the present invention were sampled and tested for mechanical properties according to the method described in example 1, and the test results are shown in table 1.
Example 3
A component part of a complex flow channel structure was prepared as described in example 1, except that this example was formulated with the following target compositions, in weight percent, including 0.15% carbon, 0.4% silicon, 0.5% manganese, 11.5% chromium, 1.5% tungsten, 0.6% molybdenum, 0.2% vanadium, 0.15% tantalum, 0.05% lanthanum, and 0.05% cerium, with the balance being iron. In the preparation process of the novel martensite heat-resistant steel alloy powder, the temperature in the medium-frequency induction furnace is controlled at 1550 ℃, the tapping temperature is 1500 ℃, the atomization pressure is 8MPa, and the drying temperature of the far infrared dryer is 235 ℃ when the supplementary materials are added. Then the powder with the granularity range of 100 meshes to 350 meshes is sieved out by a powder sieving machine to be used as finished powder. The finished powder is made into parts with complex flow channel structures by adopting a laser additive manufacturing method, the height of each layer is 0.1mm, the laser power is 1000w, the scanning speed is 10mm/s, the defocusing amount is 3mm, and the powder feeding speed is 12 g/min. The technological parameters of the stress relief annealing treatment are as follows: keeping the temperature at 750 ℃ for 2 h. Fig. 3 is a metallographic structure picture of a part with a complex flow channel structure prepared in example 3 of the present invention.
The parts prepared in example 3 according to the invention were sampled and tested for mechanical properties according to the method described in example 1, the results of which are shown in table 1.
TABLE 1
As can be seen from Table 1, the complex flow channel structure prepared by the novel martensite heat-resistant steel alloy powder has better mechanical property, the structure formed by laser additive manufacturing is a martensite + carbide structure, the crystal grains are fine and uniform, and no columnar crystal structure is formed; because the lanthanum and the cerium are added into the alloy powder, the alloy powder can be deoxidized in an alloy smelting furnace, the oxygen content in the alloy powder is controlled, and meanwhile, the residual lanthanum and cerium can continuously play roles of deoxidizing and slagging in a micro smelting pool in the additive manufacturing process by controlling the content of the lanthanum and the cerium, so that the alloy elements are prevented from being oxidized, and oxide slag inclusion is avoided.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (7)
1. A martensitic heat-resistant steel alloy powder characterized in that: the alloy powder is used for laser additive manufacturing of a complex flow channel structure, and comprises the following components in percentage by weight:
0.05-0.15% of carbon;
0.1-0.4% of silicon;
0.3-0.6% of manganese;
8.0-12.0% of chromium;
1.5-1.9% of tungsten;
0.1-0.8% of molybdenum;
0.1-0.3% of vanadium;
0.1-0.3% of tantalum;
a% of lanthanum;
b% of cerium;
the balance being iron;
wherein A is more than or equal to 0, B is more than or equal to 0, and A + B is more than or equal to 0.05 and less than or equal to 0.3,
the method for preparing the alloy powder comprises the following steps:
(1) preparing materials: the preparation method comprises the following steps of (1) preparing raw materials of manganese metal, chromium metal, tungsten metal, molybdenum metal, vanadium metal, iron metal, carbon blocks, silicon raw material, tantalum metal, lanthanum metal and cerium metal according to target components;
(2) smelting:
(2.1) adding the prepared metal manganese, metal chromium, metal tungsten, metal molybdenum, metal vanadium and metal iron into a medium-frequency induction furnace, electrifying and heating to melt the metal manganese, the metal chromium, the metal tungsten, the metal molybdenum, the metal vanadium and the metal iron, and taking a carbon block, the raw material silicon, the metal tantalum, the metal lanthanum and the metal cerium as supplementary materials;
(2.2) sequentially adding the prepared carbon block, the raw material silicon and the metal tantalum into the molten alloy solution;
(2.3) carrying out deoxidation treatment by adding metal lanthanum and metal cerium;
(2.4) discharging the materials after the components are adjusted to be qualified in front of the furnace;
(3) vacuum gas atomization: atomizing the alloy melt finally obtained in the step (2), wherein an atomizing medium is argon;
(4) and (3) drying: a far infrared dryer is adopted;
(5) screening: and screening out powder with a set particle size range by a powder screening machine to be used as finished product powder, namely the required martensite heat-resistant steel alloy powder.
2. A method of laser additive manufacturing of a complex flow channel structure using the martensitic heat-resistant steel alloy powder as claimed in claim 1, characterized by comprising the steps of:
(1) establishing a three-dimensional model according to a formed part, carrying out slice layering on the three-dimensional model by using image layering software, and carrying out forming path design by using path planning software;
(2) feeding the martensite heat-resistant steel alloy powder to the surface of the base material, scanning the martensite heat-resistant steel alloy powder on the base material by a laser beam of a laser according to a laser scanning path of a current layer to melt the martensite heat-resistant steel alloy powder, and introducing inert gas to protect a molten pool;
(3) and sequentially finishing the deposition of all the layers, and carrying out surface cleaning and stress relief annealing treatment to obtain the required formed part.
3. The method of laser additive manufacturing of a complex flow channel structure according to claim 2, wherein: in the step (2), the introduced inert gas is argon, and the purity of the argon is more than or equal to 99.99%.
4. The method of laser additive manufacturing of a complex flow channel structure according to claim 2, wherein: in the step (2) and the step (3), the laser power is 800-1000W, the scanning speed is 6-10 mm/s, the defocusing amount is 3mm, and the powder feeding rate is 8-12 g/min.
5. The method of laser additive manufacturing of a complex flow channel structure according to claim 2, wherein: the granularity of the alloy powder is 150-350 meshes.
6. The method of laser additive manufacturing of a complex flow channel structure according to claim 2, wherein: in the step (1), the height of each layer is 0.02-0.1 mm.
7. The method of laser additive manufacturing of a complex flow channel structure according to claim 2, wherein: and (4) the annealing process in the step (3) is to keep the temperature at 750 ℃ for 1-2 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397799.0A CN108504928B (en) | 2018-04-28 | 2018-04-28 | Martensitic heat-resistant steel alloy powder and method for laser additive manufacturing by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397799.0A CN108504928B (en) | 2018-04-28 | 2018-04-28 | Martensitic heat-resistant steel alloy powder and method for laser additive manufacturing by using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108504928A CN108504928A (en) | 2018-09-07 |
| CN108504928B true CN108504928B (en) | 2020-05-22 |
Family
ID=63399389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810397799.0A Active CN108504928B (en) | 2018-04-28 | 2018-04-28 | Martensitic heat-resistant steel alloy powder and method for laser additive manufacturing by using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108504928B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967733A (en) * | 2019-03-27 | 2019-07-05 | 中广核高新核材科技（苏州）有限公司 | FeCrVTiMn high-entropy alloy and the method for carrying out laser gain material manufacture using it |
| CN111390159B (en) * | 2020-03-28 | 2021-05-18 | 华中科技大学 | Alloy powder for repairing martensitic steel through laser additive manufacturing and preparation and application thereof |
| CN114411067B (en) * | 2021-12-17 | 2023-08-04 | 苏州匀晶金属科技有限公司 | Medium-carbon hot work die steel material and additive manufacturing method based on same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0688883B1 (en) * | 1993-12-28 | 1999-12-08 | Nippon Steel Corporation | Martensitic heat-resisting steel having excellent resistance to haz softening and process for producing the steel |
| CN102851610B (en) * | 2012-07-27 | 2015-10-14 | 中国科学院合肥物质科学研究院 | A kind of improved structure material martensite heat-resistant steel and preparation method thereof |
| CN104561839B (en) * | 2015-02-09 | 2017-04-05 | 中国第一重型机械股份公司 | A kind of rare earth modified 9%Cr martensites heat resisting cast steel and its manufacture method |
| CN106493364B (en) * | 2016-10-26 | 2017-07-04 | 中国科学院合肥物质科学研究院 | A kind of low activation martensitic steel precinct laser fusion increasing material manufacturing technique |
-
2018
- 2018-04-28 CN CN201810397799.0A patent/CN108504928B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108504928A (en) | 2018-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6778718B2 (en) | Method for manufacturing oxide dispersion-reinforced F / M steel in melt casting process | |
| CN109957700B (en) | FeCrCuTiV high-entropy alloy powder for laser melting deposition manufacturing and preparation method thereof | |
| CN108504928B (en) | Martensitic heat-resistant steel alloy powder and method for laser additive manufacturing by using same | |
| CN111360449B (en) | Flux-cored wire for additive manufacturing and preparation method of low-alloy high-strength steel | |
| CN102605260A (en) | Low-deformation gear steel and manufacturing method thereof | |
| CN104480403B (en) | Low-carbon martensitic precipitation hardening stainless steel and method of manufacturing impeller forging by using same | |
| CN108356263B (en) | Laser gain material manufacture heat-resisting steel alloy powder of novel martensitic and preparation method thereof | |
| CN102912222B (en) | 18MND5 low-alloy structural steel for nuclear power and technical control method for 18MND5 low-alloy structural steel | |
| CN106435282B (en) | A kind of cobalt base superalloy and preparation method thereof | |
| CN112981231B (en) | High-manganese-nitrogen austenitic stainless steel powder and preparation method thereof | |
| CN103205605A (en) | High-temperature-oxidation-resistant casting nickel-based alloy and preparation method thereof | |
| CN103320718A (en) | Method for producing austenitic stainless steel for 316 LN nuclear power | |
| CN111519108B (en) | Zirconium-reinforced low-activation martensitic steel and preparation method thereof | |
| KR20150042203A (en) | Neutron absorption material and method for manufacturing the same | |
| CN108588579B (en) | Martensite heat-resistant steel and method for manufacturing seamless steel pipe thin-wall elbow by using martensite heat-resistant steel | |
| KR102074121B1 (en) | Method for manufacturing alloy steel powder for sintered member raw material | |
| KR102064146B1 (en) | Method for producing alloyed steel powder for sintered member starting material | |
| CN114959494A (en) | 1400 MPa-grade additive manufacturing ultralow-temperature stainless steel and preparation method thereof | |
| CN103987869A (en) | Steel material for high-heat-input welding | |
| CN112853222B (en) | 06Cr18Ni11Ti austenitic stainless steel and preparation method thereof | |
| CN115369401A (en) | Corrosion-resistant layer material for laser cladding and preparation method and application thereof | |
| CN111304555B (en) | In-situ endogenously precipitated ceramic particle reinforced Cr-Mn-Ni-C-N austenitic heat-resistant steel and preparation method and application thereof | |
| CN113584350A (en) | High-temperature oxidation resistant cast high-tungsten-nickel-based alloy and preparation method thereof | |
| CN104046902A (en) | Low-molybdenum high-titanium 590MPa-grade fire-retardant steel plate for building and preparation method of steel plate | |
| CN104357753A (en) | Preparation technique of rare-earth 0Cr17Ni4Cu4Nb chemical fiber spinneret die steel |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |