CN111283341B - Wolf tooth stick welding rod hard alloy particle mixed material wet grinding process method - Google Patents
Wolf tooth stick welding rod hard alloy particle mixed material wet grinding process method Download PDFInfo
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- CN111283341B CN111283341B CN201811504439.2A CN201811504439A CN111283341B CN 111283341 B CN111283341 B CN 111283341B CN 201811504439 A CN201811504439 A CN 201811504439A CN 111283341 B CN111283341 B CN 111283341B
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
-
- 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
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/042—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling using a particular milling fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
A wolf tooth stick welding rod hard alloy particle mixed material wet grinding process method adopts the inert gas to carry out wet grinding, so that the hard alloy material is subjected to wet grinding in an oxygen control state during wet grinding, meanwhile, frozen water is added according to the wet grinding temperature during wet grinding, the wet grinding temperature of the hard alloy particles is controlled below 25 ℃ to carry out wet grinding, and the wet grinding effect of the hard alloy is improved by controlling the oxygen and the temperature. The invention realizes effective oxygen control and temperature control by wet grinding under the environment of oxygen control and temperature control and keeping the wet grinding temperature below 25 ℃, and controls the wet grinding temperature below 25 ℃ for wet grinding, thereby effectively preventing the oxidation of the hard alloy mixture in the wet grinding, effectively keeping the characteristics of the hard alloy material and improving the quality of the product.
Description
Technical Field
The invention relates to a method for manufacturing a hard alloy product, in particular to a method for manufacturing a hard alloy particle mixed material wet grinding process by using a wolf tooth rod welding rod, and belongs to the technical field of alloy product manufacturing.
Background art:
the wolf tooth stick hard alloy particle welding rod is a surfacing welding rod which takes wet-grinding tungsten carbide particles as a main component, takes copper-based alloy as a matrix material and is coated with a brazing flux, the hardness HRA of the hard alloy particles reaches 89-91, and the welding rod is widely applied to the resurfacing of various easily-worn parts and machines, such as the surfacing and repairing of wear-resistant layers of petroleum tool milling shoes, drill rod wear-resistant belts, rubber and leather filing tools and the like. But the high-end product of the existing wolf tooth stick hard alloy particle welding rod is imported from the United states completely; although a plurality of manufacturers produce similar welding rods for the wolf teeth, the defects of poor structural performance, serious surface oxidation and unattractive appearance exist in China, and the performance and the appearance of the welding rod made by the manufacturers at home can not reach the foreign level, so the improvement is needed.
Patent documents in which the same technology as that of the present invention is not found through patent search are reported, and the following patents which have a certain relationship with the present invention are mainly included:
1. the patent number is CN201110082040, the name is 'a method for preparing a hard alloy mixture by using water as a wet grinding medium', the patent discloses a method for preparing a hard alloy mixture by using water as a wet grinding medium, deionized water is used as the wet grinding medium, 300ml of deionized water is added into each kilogram of hard alloy raw materials, an antioxidant accounting for 0.1-2% of the total weight of the hard alloy raw materials is added to prepare a wet grinding system, a forming agent is added according to the convention, and the hard alloy mixture is prepared by rolling ball milling and spray drying processes.
2. Patent No. CN201380061625 entitled "electrode incorporating metallically coated particles and method of hardfacing therewith," which discloses a method of hardfacing a metal workpiece comprising the steps of: providing a metal workpiece, preparing a particulate metal alloying compound comprising a plurality of particles, wherein each of the plurality of particles has an outer surface, and wherein at least one layer of a metallic coating is deposited onto the outer surface of each particle to form a metallic coated particle, preparing a core material comprising the metallic coated particle, forming a cored wire electrode by placing the core material into a metallic sheath, conveying the cored wire electrode toward the workpiece, and taking welding measures to create a weld puddle and transferring the cored wire electrode into the weld puddle, wherein at least a portion of the cored wire electrode is melted and the metallic coated particles are deposited into the weld puddle.
3. The invention patent with the patent number of CN201210083278 and the name of 'a composite welding rod with particle filling suitable for large-gap brazing' discloses a composite welding rod with particle filling suitable for large-gap brazing, which is characterized in that: the composite welding rod consists of a bonding inner core and an outer ring layer brazing filler metal wrapped on the bonding inner core; the bonding inner core is formed by mixing the following raw materials in percentage by weight: 90-95% of metal particles, 4-10% of brazing flux and 0-3% of binder. The welding rod solves the problems of complex process and waste of brazing filler metal loss of the existing large-gap brazing process, and is suitable for the processes of flame brazing, induction brazing and the like with a large gap of 0.8-2.0 mm.
Although the above patents relate to the wet grinding of hard alloy or the manufacture of hard alloy particle welding rod, it does not suggest how to improve the shortcomings of the existing domestic welding rod, and therefore, the problems of the domestic welding rod in practical application still remain unsolved, and further improvement is needed.
Disclosure of Invention
The invention aims to provide a new method for wet grinding and manufacturing a hard alloy particle mixed material of a wolf tooth rod welding rod aiming at the defects of unstable performance and unattractive appearance of the traditional domestic wolf tooth rod welding rod.
In order to achieve the purpose, the inventor of the invention discovers that the current domestic wolf tooth stick welding rod has serious surface oxidation, leads to unattractive appearance and has an important reason that the performance is influenced because the performance of the hard alloy particles produced by the hard alloy mixture in China is insufficient, the main wet grinding process is too simple, the performance of the hard alloy particles is influenced, therefore, the invention provides a wet grinding process method of a hard alloy particle mixed material of a wolf tooth rod welding rod according to the discovered phenomenon, which adopts inert gas to carry out wet grinding, so that the hard alloy material is subjected to wet grinding in an oxygen control state during the wet grinding, and simultaneously, during wet grinding, chilled water is added according to the wet grinding temperature, the wet grinding temperature of the hard alloy particles is controlled below 25 ℃ for wet grinding, and the wet grinding effect of the hard alloy is improved by controlling oxygen and temperature.
Further, the inert gas is introduced for wet grinding, namely, the hard alloy mixed material to be subjected to wet grinding is firstly placed into a wet grinding machine filled with absolute ethyl alcohol, and then the inert gas is introduced, so that the hard alloy mixed material is subjected to wet grinding under the protection of the inert gas.
Further, the step of introducing the inert gas is to firstly vacuumize the wet grinder, fill the inert gas into the wet grinder through a pipeline after vacuumizing, further exhaust the air in the wet grinder through the inert gas, enable the wet grinder to be an oxygen-free environment, and carry out wet grinding in an oxygen-controlled environment.
Further, the inert gas includes argon or helium, the purity of the inert gas must be more than 99%, and nitrogen can be used to replace the inert gas.
Further, the addition of the frozen water according to the wet grinding temperature during wet grinding is carried out according to the wet grinding temperature during grinding, and when the temperature exceeds 25 ℃, a proper amount of deionized frozen water is added, so that the wet grinding temperature is controlled below 25 ℃.
Furthermore, the deionized chilled water is deionized water with the conductivity less than 5 mu g/l and the resistivity of 17-18 omega cm, and the addition of the deionized chilled water ensures that the oxygen content in the gas environment in the wet grinder is less than 0.01 percent.
The invention has the advantages that:
the invention carries out wet grinding under the environment of controlling oxygen and temperature and keeping the wet grinding temperature below 25 ℃, and the invention mainly has the following characteristics:
1) by filling inert gas into the wet grinder and effectively controlling oxygen, the oxidation of the hard alloy mixture in the wet grinding can be effectively prevented, the characteristics of the hard alloy material are effectively maintained, and the quality of the product is improved.
2) The wet grinding machine is injected with a proper amount of deionized chilled water to realize effective temperature control, the wet grinding temperature is controlled below 25 ℃ for wet grinding, the oxidation of the hard alloy mixture in the wet grinding can be effectively prevented, the characteristics of the hard alloy material are effectively maintained, and the quality of the product is improved.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Example one
A wolf tooth stick welding rod hard alloy particle mixed material wet grinding process method adopts argon gas to carry out wet grinding, so that the hard alloy material is subjected to wet grinding in an oxygen control state during wet grinding, meanwhile, frozen water is added according to the wet grinding temperature during wet grinding, the wet grinding temperature of the hard alloy particles is controlled below 25 ℃ to carry out wet grinding, and the effect of the hard alloy wet grinding is improved by controlling the oxygen and the temperature.
Further, the argon gas is introduced for wet grinding, namely, the hard alloy mixed material to be subjected to wet grinding is firstly placed into a wet grinding machine filled with absolute ethyl alcohol, and then inert gas is introduced, so that the hard alloy mixed material is subjected to wet grinding under the protection of the inert gas.
Furthermore, the argon gas is introduced to firstly vacuumize the wet grinder, after the vacuumization, the argon gas is filled into the wet grinder through a pipeline, the air in the wet grinder is further discharged through the argon gas, so that the wet grinder becomes an oxygen-free environment, and the wet grinding is carried out in an oxygen-controlled environment.
Furthermore, the argon is filled into the wet grinder, the wet grinder is filled under a sealed vacuum environment, and the purity of the argon is required to be more than 99%.
Further, the addition of the frozen water according to the wet grinding temperature during wet grinding is carried out according to the wet grinding temperature during grinding, and when the temperature exceeds 25 ℃, a proper amount of deionized frozen water is added, so that the wet grinding temperature is controlled below 25 ℃.
Furthermore, the deionized chilled water is deionized water with the conductivity less than 5 mu g/l and the resistivity of 17-18 omega cm, and the addition of the deionized chilled water ensures that the oxygen content in the gas environment in the wet grinder is less than 0.01 percent.
Example two
The implementation mode of the second embodiment is basically the same as that of the first embodiment except that the conditions are slightly different, and the second embodiment is a wolf tooth rod welding rod hard alloy particle mixed material wet grinding process method, wherein nitrogen is introduced for wet grinding, so that the hard alloy material is subjected to wet grinding in an oxygen control state during wet grinding, and meanwhile, frozen water is added during wet grinding according to the wet grinding temperature, the wet grinding temperature of the hard alloy particles is controlled below 25 ℃ for wet grinding, and the effect of the hard alloy wet grinding is improved by controlling the oxygen and the temperature.
Furthermore, the step of introducing nitrogen for wet grinding is to put the hard alloy mixture to be subjected to wet grinding into a wet grinding machine filled with absolute ethyl alcohol, and then introduce inert gas to wet grind the hard alloy mixture under the protection of the inert gas.
Furthermore, the nitrogen gas is introduced to firstly vacuumize the wet grinder, the wet grinder is filled with the nitrogen gas through a pipeline after vacuumization, air in the wet grinder is further exhausted through the nitrogen gas, so that the wet grinder becomes an oxygen-free environment, and wet grinding is carried out in an oxygen-controlled environment.
Further, the purity of the nitrogen gas must be above 99%.
Further, the addition of the frozen water according to the wet grinding temperature during wet grinding is that according to the wet grinding temperature during grinding, when the temperature exceeds 25 ℃, a proper amount of deionized frozen water is added, so that the wet grinding temperature is controlled below 25 ℃; the addition amount of the deionized and frozen water is not more than 2 percent of the total mass of the powder.
Furthermore, the deionized chilled water is deionized water with the conductivity less than 5 mu g/l and the resistivity of 17-18 omega cm, and the addition of the deionized chilled water ensures that the oxygen content in the gas environment in the wet grinder is less than 0.01 percent.
EXAMPLE III
The third embodiment is basically the same as the first embodiment except that the conditions are slightly different, and is a wolf tooth rod welding rod hard alloy particle mixed material wet grinding process method, wherein the wet grinding is carried out by introducing helium gas, so that the hard alloy material is subjected to wet grinding in an oxygen-controlled state during wet grinding, and meanwhile, during the wet grinding, chilled water is added according to the wet grinding temperature, the wet grinding temperature of the hard alloy particles is controlled below 25 ℃ for wet grinding, and the effect of the hard alloy wet grinding is improved by controlling the oxygen and the temperature.
Furthermore, the wet grinding by introducing helium is to firstly put the hard alloy mixture to be subjected to wet grinding into a wet grinding machine filled with absolute ethyl alcohol, and then introduce inert gas to enable the hard alloy mixture to be subjected to wet grinding under the protection of helium.
Furthermore, the helium is introduced into the wet grinding machine, the wet grinding machine is vacuumized, the helium is filled into the wet grinding machine through a pipeline after the vacuumizing, the air in the wet grinding machine is further exhausted through the helium, so that the wet grinding machine becomes an oxygen-free environment, and the wet grinding is carried out in an oxygen-controlled environment.
Further, the purity of the helium must be above 99% to ensure that the oxygen content in the gas environment in the wet mill is below 0.01%.
Further, the addition of the frozen water according to the wet grinding temperature during wet grinding is carried out according to the wet grinding temperature during grinding, and when the temperature exceeds 25 ℃, a proper amount of deionized frozen water is added, so that the wet grinding temperature is controlled below 25 ℃.
Furthermore, the deionized chilled water is deionized water with the conductivity less than 5 mu g/l and the resistivity of 17-18 omega cm, and the addition of the deionized chilled water ensures that the oxygen content in the gas environment in the wet grinder is less than 0.01 percent.
The above listed embodiments are only for clear and complete description of the technical solution of the present invention; it is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention has the advantages that:
the invention carries out wet grinding under the environment of controlling oxygen and temperature and keeping the wet grinding temperature below 25 ℃, and the invention mainly has the following characteristics:
1) by filling inert gas into the wet grinder and effectively controlling oxygen, the oxidation of the hard alloy mixture in the wet grinding can be effectively prevented, the characteristics of the hard alloy material are effectively maintained, and the quality of the product is improved.
2) The wet grinding machine is injected with a proper amount of deionized chilled water to realize effective temperature control, the wet grinding temperature is controlled below 25 ℃ for wet grinding, the oxidation of the hard alloy mixture in the wet grinding can be effectively prevented, the characteristics of the hard alloy material are effectively maintained, and the quality of the product is improved.
Claims (2)
1. A wet grinding process method for a hard alloy particle mixed material of a wolf tooth rod welding rod is characterized by comprising the following steps: putting a hard alloy mixed material to be wet-milled into a wet mill filled with absolute ethyl alcohol, then introducing inert gas, and wet-milling by introducing the inert gas, so that the hard alloy material is wet-milled in an oxygen-controlled state during wet milling, meanwhile, adding chilled water according to the wet milling temperature during wet milling, controlling the wet milling temperature of hard alloy particles to be below 25 ℃ for wet milling, and improving the effect of the wet milling of the hard alloy by controlling the oxygen and the temperature; the addition of the frozen water according to the wet grinding temperature during the wet grinding is to add a proper amount of deionized frozen water when the temperature exceeds 25 ℃ according to the wet grinding temperature during the grinding so as to control the wet grinding temperature below 25 ℃; the deionized chilled water is deionized water with the conductivity less than 5 mu g/l and the resistivity of 17-18 omega cm, and the addition of the deionized chilled water ensures that the oxygen content in the gas environment in the wet grinder is less than 0.01 percent; the inert gas is introduced by firstly vacuumizing the wet grinder, filling the inert gas into the wet grinder through a pipeline after vacuumizing, further discharging air in the wet grinder through the inert gas, so that the wet grinder becomes an oxygen-free environment, and wet grinding is carried out in an oxygen-controlled environment.
2. The wet grinding process method for the hard alloy particle mixed material of the wolf tooth stick welding rod as claimed in claim 1, characterized in that: the inert gas comprises argon or helium, and the purity of the inert gas must be more than 99%.
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| CN108265218A (en) * | 2018-03-26 | 2018-07-10 | 西安交通大学 | A kind of preparation process of -304 stainless steel metal ceramics of rear-earth-doped Ti (C, N) |
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| EP0834589A1 (en) * | 1996-10-02 | 1998-04-08 | Nanodyne Incorporated | Multi-step process to incorporate grain growth inhibitors in WC-Co composite |
| CN1804067A (en) * | 2006-01-17 | 2006-07-19 | 武汉理工大学 | Preparation process of tungsten carbide/inhibitor composite powder and superfine hard alloy thereof |
| CN1943926A (en) * | 2006-11-01 | 2007-04-11 | 武汉理工大学 | Process for preparing cobalt-inhibitor super fine composite powder |
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