CN112008294A - Ternary boride and preparation method and application thereof - Google Patents
Ternary boride and preparation method and application thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
- B23K10/027—Welding for purposes other than joining, e.g. build-up welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- 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
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- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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Abstract
The invention belongs to the technical field of welding material preparation, and particularly relates to a ternary boride and a preparation method and application thereof. The raw materials of the ternary boride comprise, by mass, 2-8% of boron element, 20-50% of iron element, 31-55% of molybdenum element, 1-15.5% of chromium element, 0.2-3% of silicon element, 1-5% of nickel element and 0.5-2.5% of manganese element. The boron, the iron, the molybdenum, the chromium, the silicon, the nickel and the manganese in a specific ratio are used as raw materials, so that a ternary boride overlaying layer generated in the overlaying process can be ensured to have better wear resistance, toughness and hardness; the raw materials provided by the invention can be used as welding materials to be applied to surfacing welding, the ternary boride is synthesized in situ through welding metallurgy, the bonding strength of the ternary boride and a metal matrix is good, and the ternary boride is not easy to fall off. Silicon element is added into the ternary boride, so that oxygen in the boride can be removed, and welding slag is formed and discharged.
Description
Technical Field
The invention belongs to the technical field of welding material preparation, and particularly relates to a ternary boride and a preparation method and application thereof.
Background
With the development of science and technology, most of mechanical manufacturing equipment is developed in the direction of large-scale and high-efficiency, and higher requirements are put forward on the reliability and usability of products. Under the complex working conditions of high temperature and high pressure, large load bearing, oxidation, corrosion and the like, mechanical equipment cannot normally work due to abrasion, corrosion and the like, so that the surfaces of parts are required to have excellent wear resistance, corrosion resistance, high humidity resistance and oxidation resistance. The surfacing welding is a branch of welding technology, is one of important ways for improving and prolonging the service life of mechanical equipment, and has the most important characteristic that a good metallurgical bonding can be formed between a coating and a substrate. According to the use performance of the coating, an ideal surfacing alloy system can be selected and designed, so that the surface of the parent metal obtains good performances, such as wear resistance, high temperature resistance, corrosion resistance, oxidation resistance and the like, and the process has great flexibility. By adopting the surfacing technology, metal parts with unqualified shapes and sizes can be repaired, and surfacing welding materials for strengthening the surface performance of products can be reasonably selected.
Boride is used as a high-tech material and is more and more widely applied, and a ternary boride coating or a metal cladding layer containing a ternary boride particle phase has the toughness and the easy processing performance of a metal matrix and has the high hardness and the high wear resistance of ceramic phase particles. In the prior art, research personnel prepare ternary boride coating materials on the surface of a steel substrate for improving the toughness, the processing performance, the wear resistance and the like of the steel substrate, but the bonding strength of the ternary boride and steel is low, and the ternary boride is easy to fall off during cold and hot circulation.
In addition, chinese patent document CN109112381A discloses a ternary boride cermet Mo for build-up welding2FeB2The alloy powder comprises the following raw materials: the alloy powder contains graphite, so that a large amount of carbon elements are transferred into surfacing metal, and meanwhile, in the carbon rod cladding process, the carbon rod cladding process also comprises the steps ofThe carbon element in the carbon rod can be transited to the surfacing metal, so that the use amount of the carbon element in the surfacing metal is uncontrollable, and the toughness, the wear resistance and the like of the material can be reduced.
Disclosure of Invention
Therefore, the invention aims to overcome the defects that the bonding strength of the ternary boride and a base material is low, the ternary boride is easy to fall off during cold and hot circulation, the hardness, the toughness and the wear resistance of the ternary boride and the base material after bonding are poor and the like in the prior art, and provides the ternary boride and the preparation method and application thereof.
Therefore, the invention provides the following technical scheme.
The invention provides a ternary boride which comprises, by mass, 2-8% of boron, 20-50% of iron, 31-55% of molybdenum, 1-15.5% of chromium, 0.2-3% of silicon, 1-5% of nickel and 0.5-2.5% of manganese.
Further, the raw materials of the ternary boride comprise, by mass, 17-23% of ferroboron, 40-65% of ferromolybdenum, 10-16% of chromium, 1-6% of ferrosilicon, 1-3% of nickel and 0.2-4% of ferromanganese.
The raw material of the ternary boride also comprises iron powder and/or molybdenum powder.
The iron powder and the molybdenum powder are used for ensuring the dosage of the iron element and the molybdenum element to be within the scope of the invention.
The raw material of the ternary boride also comprises 10-20 wt% of a binder;
the binder is polyvinyl alcohol aqueous solution and/or water glass.
The invention also provides the application of the ternary boride in surfacing.
In addition, the invention also provides a preparation method of the ternary boride, which comprises the following steps,
ball-milling all the raw materials, and uniformly mixing to form a mixed material;
adding a binder into the mixed materials, uniformly mixing, and carrying out extrusion forming;
in the process of overlaying, the ternary boride is synthesized in situ.
Furthermore, the surfacing is layered surfacing, and the thickness of each layer is 1-2 mm; the width of the surfacing is 2-3 mm.
The interlayer temperature of the surfacing is 50-100 ℃.
The grain size of the mixed material is less than 10 mu m.
The surfacing is argon arc welding or plasma cladding.
The technical scheme of the invention has the following advantages:
1. the raw materials of the ternary boride provided by the invention comprise, by mass, 2-8% of boron element, 20-50% of iron element, 31-55% of molybdenum element, 1-15.5% of chromium element, 0.2-3% of silicon element, 1-5% of nickel element and 0.5-2.5% of manganese element. The boron, the iron, the molybdenum, the chromium, the silicon, the nickel and the manganese in a specific ratio are used as raw materials, so that a ternary boride overlaying layer generated in the overlaying process can be ensured to have better wear resistance, toughness and hardness; the raw materials provided by the invention can be used as welding materials to be applied to surfacing welding, the ternary boride is synthesized in situ through welding metallurgy, the bonding strength of the ternary boride and a metal matrix is good, and the ternary boride is not easy to fall off. Silicon element is added into the ternary boride, so that oxygen in the boride can be removed, and welding slag is formed and discharged.
2. According to the ternary boride provided by the invention, by adopting ferroboron, ferromolybdenum, chromium, ferrosilicon, nickel and ferromanganese in a specific ratio, in the surfacing process, B, Mo and Fe form hard phase Mo2FeB2The ceramic and the martensite are supersaturated solid solutions of carbon in alpha-Fe, high strength and hardness are one of the main characteristics of the martensite, the mass percentage of a hard phase in the ternary boride is about 50%, the hard phase and the martensite matrix are generated in the original mode in the surfacing process, a bonding interface is free of pollution, the hard phase is dispersed and distributed in the matrix, and therefore the good bonding strength of the formed ternary boride and the metal matrix can be guaranteed, and the ternary boride is not prone to falling off.
The content of carbon element and other elements in the ternary boride is strictly controlled, so that martensite can be formed, and the overlaying layer has high strength and good toughness; the added chromium can play a role in passivation, so that the surfacing layer has better corrosion resistance; the addition of nickel can expand austenite and increase the toughness of the weld overlay.
The wear resistance of the overlay is determined by the content of the ternary boride, the higher the content is, the better the wear resistance is, and when the content exceeds 50%, cracks are easy to appear on the overlay.
The addition of ferromolybdenum is beneficial to the formation of the ternary boride, and compared with the form of adding molybdenum powder, the addition of the surfacing layer in the form of ferromolybdenum powder is beneficial to the formation of the ternary boride with higher content, because the melting point of molybdenum is 2620 ℃, the surfacing process is a process of rapid heating and rapid cooling, the reaction of refractory metals is difficult, and the form of the ferromolybdenum powder is more prone to react when the ternary boride is formed.
By controlling the granularity of the mixed materials, the finer the granularity of the raw materials is, the more sufficient the reaction is in the welding metallurgical process, the short welding metallurgical time is, only the rapid reaction is carried out, the generated welding slag and gas have time to overflow, and the problems of air holes, slag inclusion and the like in the welding seam can be avoided. The problems of air holes and slag inclusion in the welding seal can be avoided by controlling the granularity of the mixed material, and the cost and the production time can be reduced.
3. According to the preparation method of the ternary boride, the ternary boride is synthesized in situ in the surfacing process, and the interface of the ternary boride and a matrix is clean, pollution-free and high in bonding strength. The overlaying layer and the base metal are metallurgically combined, the overlaying layer is not easy to fall off, simultaneously, the ternary boride provided by the invention can ensure the hardness, the wear resistance and the toughness of the overlaying layer, the hardness of the overlaying layer can reach HRC69 to the maximum, and the wear resistance can be higher than that of YG8 tungsten-cobalt hard alloy. The toughness of the surfacing layer is improved by controlling the thickness and width of the surfacing layer and the interlayer temperature.
The surfacing layer and the metal matrix have good thermal stability and are not easy to crack.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is an optical microscopic view of a ternary boride obtained in example 1 of the present invention;
FIG. 2 is a scanning electron micrograph of a ternary boride obtained in example 1 of the present invention.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
In the following examples, the mass contents of the respective elements in the raw materials used were respectively:
silicon iron powder: the mass content of silicon element is 50-55%, the mass content of carbon element is 0.05%, and the balance is iron, in the embodiment of the invention, the mass content of silicon element is 52%;
chromium powder: the mass content of the chromium element is more than 99 percent; nickel powder: the mass content of the nickel element is more than 99.9 percent;
iron powder: the mass content of the iron element is more than 99.7 percent;
and (3) molybdenum iron powder: the mass content of iron element is 37 percent, the mass content of carbon element is 0.1 percent, and the balance is molybdenum;
b, ferroboron powder: the mass content of boron element is 18.7 percent, the mass content of silicon element is 0.7 percent, and the balance is iron;
manganese iron powder: the mass content of manganese element is 55%, the mass content of carbon element is 0.5%, and the balance is iron.
Example 1
The embodiment provides a ternary boride which comprises the following raw materials of 195g of ferroboron powder, 625g of ferromolybdenum powder, 130g of chromium powder, 20g of ferrosilicon powder, 20g of nickel powder and 10g of ferromanganese powder; wherein, the mass content of boron element is 3.66%, the mass content of silicon element is 1.18%, the mass content of iron element is 40.3%, the mass content of molybdenum element is 39.36%, the mass content of chromium element is 12.89%, the mass content of nickel element is 2%, and the mass content of manganese element is 0.55%.
The preparation method of the ternary boride comprises the following steps,
weighing the raw materials according to the mass, taking absolute ethyl alcohol as a ball milling medium, and carrying out ball milling for 16h to form a mixed material, wherein the granularity of the mixed material is less than 10 mu m; adding 10 wt% of polyvinyl alcohol aqueous solution of a binder, uniformly mixing, and extruding to obtain a welding wire with the diameter of 2.5 mm; and (2) carrying out surfacing by adopting argon arc welding, synthesizing ternary boride (namely forming a surfacing layer) in situ in the surfacing process, and carrying out surfacing by adopting a layered surfacing method, wherein the thickness of each surfacing layer is 1mm, the width of each surfacing layer is 2mm, and the interlayer temperature is 80 ℃.
Example 2
The embodiment provides a ternary boride, which comprises the following raw materials of 195g of ferroboron powder, 625g of ferromolybdenum powder, 130g of chromium powder, 20g of ferrosilicon powder, 20g of nickel powder and 10g of ferromanganese powder; wherein, the mass content of boron element is 3.66%, the mass content of silicon element is 1.18%, the mass content of iron element is 40.3%, the mass content of molybdenum element is 39.36%, the mass content of chromium element is 12.89%, the mass content of nickel element is 2%, and the mass content of manganese element is 0.55%.
The preparation method of the ternary boride comprises the following steps,
weighing the raw materials according to the mass, taking absolute ethyl alcohol as a ball milling medium, and carrying out ball milling for 16h to form a mixed material, wherein the granularity of the mixed material is less than 10 mu m; adding 10 wt% of polyvinyl alcohol aqueous solution of a binder, uniformly mixing, and extruding to obtain a welding wire with the diameter of 3.2 mm; the plasma cladding is adopted for surfacing, the ternary boride (namely, a surfacing layer is formed) is synthesized in situ in the surfacing process, the surfacing is carried out by adopting a layered surfacing method, the thickness of each surfacing layer is 1mm, the width is 2mm, and the interlayer temperature is 80 ℃.
Example 3
The embodiment provides a ternary boride, which comprises the raw materials of 205g of ferroboron powder 18.79%, 496g of ferromolybdenum powder 45.46%, 140g of chromium powder 12.83%, 12g of ferrosilicon powder 1.1%, 25g of nickel powder 2.23%, 43g of ferromanganese powder 3.94%, 50g of molybdenum powder and 120g of iron powder; wherein, the mass content of boron element is 3.53 percent, the mass content of silicon element is 0.71 percent, the mass content of iron element is 45.36 percent, the mass content of molybdenum element is 33.3 percent, the mass content of chromium element is 12.58 percent, the mass content of nickel element is 2.28 percent and the mass content of manganese element is 2.18 percent.
The preparation method of the ternary boride comprises the following steps,
weighing the raw materials according to the mass, taking absolute ethyl alcohol as a ball milling medium, and carrying out ball milling for 16h to form a mixed material, wherein the granularity of the mixed material is less than 10 mu m; adding 10 wt% of polyvinyl alcohol aqueous solution of a binder, uniformly mixing, and extruding to obtain a welding wire with the diameter of 2.5 mm; and (2) carrying out surfacing by adopting argon arc welding, synthesizing ternary boride (namely forming a surfacing layer) in situ in the surfacing process, and carrying out surfacing by adopting a layered surfacing method, wherein the thickness of each surfacing layer is 1mm, the width of each surfacing layer is 2mm, and the interlayer temperature is 60 ℃.
Example 4
The embodiment provides a ternary boride which comprises 105g of ferroboron powder, 425g of ferromolybdenum powder, 110g of chromium powder, 40g of ferrosilicon powder, 5.6 percent of 20g of nickel powder and 15g of ferromanganese powder; wherein, the mass content of boron element is 2.75%, the mass content of silicon element is 3.01%, the mass content of iron element is 37.45%, the mass content of molybdenum element is 37.39%, the mass content of chromium element is 15.23%, the mass content of nickel element is 2.8%, and the mass content of manganese element is 1.15%.
The preparation method of the ternary boride comprises the following steps,
weighing the raw materials according to the mass, taking absolute ethyl alcohol as a ball milling medium, and carrying out ball milling for 16h to form a mixed material, wherein the granularity of the mixed material is less than 10 mu m; adding 10 wt% of polyvinyl alcohol aqueous solution of a binder, uniformly mixing, and extruding to obtain a welding wire with the diameter of 3.2 mm; and (2) carrying out surfacing by adopting argon arc welding, in-situ synthesizing ternary boride (namely forming a surfacing layer) in the surfacing process, wherein the surfacing is carried out by adopting a layered surfacing method, the thickness of each surfacing layer is 1mm, the width of each surfacing layer is 3mm, and the interlayer temperature is 80 ℃.
Comparative example 1
The comparative example provides a ternary boride comprising 251g of ferroboron powder, 700g of ferromolybdenum powder, 20g of chromium powder, 12g of ferrosilicon powder, 5g of nickel powder and 10g of ferromanganese powder as raw materials;
the preparation method of the ternary boride comprises the following steps,
weighing the raw materials according to the mass, taking absolute ethyl alcohol as a ball milling medium, and carrying out ball milling for 16h to form a mixed material, wherein the granularity of the mixed material is less than 10 mu m; adding a 10 wt% polyvinyl alcohol aqueous solution of a binder, uniformly mixing, and extruding to obtain a welding wire; and (2) carrying out surfacing by adopting argon arc welding, synthesizing ternary boride (namely forming a surfacing layer) in situ in the surfacing process, and carrying out surfacing by adopting a layered surfacing method, wherein the thickness of each surfacing layer is 1mm, the width of each surfacing layer is 2mm, and the interlayer temperature is 80 ℃.
Comparative example 2
The comparative example provides a ternary boride which comprises the raw materials of 495g of ferroboron powder, 452g of chromium powder, 20g of ferrosilicon powder, 20g of nickel powder and 10g of ferromanganese powder;
the preparation method of the ternary boride comprises the following steps,
weighing the raw materials according to the mass, taking absolute ethyl alcohol as a ball milling medium, and carrying out ball milling for 16h to form a mixed material, wherein the granularity of the mixed material is less than 10 mu m; adding 10 wt% of polyvinyl alcohol aqueous solution of a binder, uniformly mixing, and extruding to obtain a welding wire with the diameter of 2.5 mm; and (2) carrying out surfacing by adopting argon arc welding, synthesizing ternary boride (namely forming a surfacing layer) in situ in the surfacing process, and carrying out surfacing by adopting a layered surfacing method, wherein the thickness of each surfacing layer is 1mm, the width of each surfacing layer is 2mm, and the interlayer temperature is 80 ℃.
Test examples
The test examples provide the performance tests and test results of the ternary boride hardfacing layers formed in examples 1-4 and comparative examples 1-2, as follows, and the test results are shown in table 1.
The hardness testing method of the ternary boride overlaying layer comprises the following steps: microhardometer HV-1000A.
The method for testing the bending strength of the ternary boride overlaying layer comprises the following steps: measuring by adopting a three-point bending method, wherein the span is 30mm, and the loading rate is 0.5 mm/min; testing 5 test strips according to each datum, and then taking an average value to obtain the bending strength; the instrument used an Instron1195 universal materials testing machine made from english and the test strips used for the test had dimensions 3 × 4 × 35(mm × mm).
The heat cracking experimental method of the ternary boride overlaying layer comprises the following steps: heating the surfacing welded workpiece to 800 ℃ by using oxyacetylene flame, quickly placing the workpiece into flowing water (the water temperature is 25 ℃), repeating the steps for 20 times, and observing whether cracks exist in the substrate and the surfacing layer.
The method for testing the wear resistance of the ternary boride overlaying layer comprises the following steps: refer to national standard GB/T12444-.
TABLE 1 Performance test results of ternary boride hardfacing layer
| Examples of the invention | Hardness of | Bending strength | Hot cracking test | Wear resistance |
| Example 1 | HV1220 | 1380MP | Without cracks | 0.067g |
| Example 2 | HV1186 | 1512MP | Without cracks | 0.009g |
| Example 3 | HV1078 | 1267MP | Without cracks | 0.067g |
| Example 4 | HV1156 | 1187MP | Without cracks | 0.092g |
| Comparative example 1 | HV675 | 1122MP | Has cracks | 0.407g |
| Comparative example 2 | HV589 | 890MP | Has cracks | 0.434g |
From the experimental results of the examples and comparative examples, it can be seen that the wear resistance, wear resistance and strength of the ternary boride obtained by controlling the amounts of ferroboron, ferromolybdenum, chromium, ferrosilicon, nickel, ferromanganese, molybdenum and iron used in the present invention are all good.
FIG. 1 is an optical microscopic view of the ternary boride obtained in example 1 of the present invention, and it can be seen that the hard phase of the ternary boride prepared by the present invention is uniformly distributed in the lath-like martensite matrix. FIG. 2 is a scanning electron microscope image of the ternary boride obtained in example 1 of the present invention, from which it can be seen that the ternary boride with a dendritic structure is obtained, the strength and wear resistance of the ternary boride under the structure are good, and from which it can be seen that the hard phase is uniformly distributed in the ternary boride, which ensures that the formed ternary boride has good bonding strength with the metal matrix, and is not easy to fall off, and the mass ratio of the hard phase is about 50%.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. The ternary boride is characterized in that raw materials comprise, by mass, 2-8% of boron element, 20-50% of iron element, 31-55% of molybdenum element, 1-15.5% of chromium element, 0.2-3% of silicon element, 1-5% of nickel element and 0.5-2.5% of manganese element.
2. The ternary boride according to claim 1 wherein the raw materials include, in mass fraction, 17 to 23% ferroboron, 40 to 65% ferromolybdenum, 10 to 16% chromium, 1 to 6% ferrosilicon, 1 to 3% nickel, and 0.2 to 4% ferromanganese.
3. The ternary boride according to claim 2 further comprising iron and/or molybdenum powder.
4. The ternary boride according to any one of claims 1 to 3 further comprising 10 to 20 wt% of a binder;
the binder is polyvinyl alcohol aqueous solution and/or water glass.
5. Use of a ternary boride according to any one of claims 1 to 4 in hardfacing.
6. A method for producing a ternary boride according to any one of claims 1 to 5, comprising the steps of,
ball-milling all the raw materials, and uniformly mixing to form a mixed material;
adding a binder into the mixed materials, uniformly mixing, and carrying out extrusion forming;
in the process of overlaying, the ternary boride is synthesized in situ.
7. The production method according to claim 6, wherein the build-up welding is layered build-up welding, and the thickness of each layer is 1-2 mm; the width of the surfacing is 2-3 mm.
8. The production method according to claim 6 or 7, wherein the temperature between layers of the build-up welding is 50 to 100 ℃.
9. A method of producing as claimed in any one of claims 6 to 8, characterized in that the particle size of the mix is less than 10 μm.
10. The production method according to any one of claims 6 to 9, wherein the overlaying welding is argon arc welding or plasma cladding.
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| CN115740838A (en) * | 2022-11-14 | 2023-03-07 | 湘潭大学 | Composite powder particles of surfacing high-boron alloy and application method |
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