CN109504885B - Hard alloy bar for water jet cutting sand pipe and preparation method thereof - Google Patents
Hard alloy bar for water jet cutting sand pipe and preparation method thereof Download PDFInfo
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- CN109504885B CN109504885B CN201811233795.5A CN201811233795A CN109504885B CN 109504885 B CN109504885 B CN 109504885B CN 201811233795 A CN201811233795 A CN 201811233795A CN 109504885 B CN109504885 B CN 109504885B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
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- 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
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
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- 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
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- 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
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a hard alloy bar for a water jet cutter sand pipe and a preparation method thereof, belonging to the technical field of preparation of wear-resistant parts. The hard alloy bar is prepared from the following raw materials in parts by weight: 0 to 0.5% of Co powder, 0.05 to 0.5% of ZrC, and 0.05 to 0.5% of ZrB2Powder, 0.15-1.5% of NbC, 0.15-0.5% of VC, 0.15-0.5% of Cr3C2And the balance is WC powder. The preparation method of the hard alloy bar mainly comprises the steps of material preparation, ball milling, atomization drying, cold isostatic pressing and hot isostatic pressing sintering. The WC average grain size of the prepared hard alloy bar is 0.16-0.2 mu m, and HV10The service life of the water jet sand pipe is not less than 100h under the water-sand mixing working condition of 300 MPa.
Description
Technical Field
The invention belongs to the technical field of wear-resistant part preparation, and particularly relates to a hard alloy bar for a water jet cutter sand pipe and a preparation method thereof.
Background
High-pressure water jet cutting, also called water jet cutting, is a novel cold-state manufacturing new process which is rapidly developed in recent years. The water jet cutting method comprises the steps of pressurizing water to 200-420 MPa, spraying water columns at about 800-100 m/s in superfine pores through a special cutting nozzle for cutting, and has the advantages of wide range of cutting materials (steel, titanium, alloy, ceramic, stone, glass and the like), high processing quality, high cutting thickness (up to 80mm), capability of cutting any shape, safety, cleanness and the like. The inner hole channel of the water jet nozzle (water jet sand pipe) bears multiple functions of scouring of high-pressure water flow, high-speed abrasion of solid particles, high-speed jet cavitation erosion and the like, so that the inner diameter concentricity, the high finish degree and the high wear resistance of the water jet sand pipe are ensured in order to ensure the service life of the water jet sand pipe, improve the processing efficiency and reduce the processing cost.
Disclosure of Invention
The invention aims to provide a hard alloy bar for a water jet cutting sand pipe and a preparation method thereof, and the hard alloy bar is characterized by comprising the following chemical components in percentage by weight: 0 to 0.5 percent of Co powder, 0.05 to 0.5 percent of ZrC powder and 0.05 to 0.5 percent of ZrB2Powder, 0.15-1.5% of NbC powder, 0.15-0.5% of VC powder and 0.15-0.5% of Cr3C2Powder and the balance of WC powder.
Wherein ZrC powder and ZrB2The Fisher particle size of the NbC powder is 0.5 mu m, and the Fisher particle size of the NbC powder is 0.8 mu mm, the Fisher size of the WC powder is 0.2-0.4 mu m.
Wherein ZrC powder and ZrB2The mass ratio of the powder to the NbC powder is 1:1: 3.
The preparation method of the hard alloy bar for the water jet cutting sand pipe specifically comprises the following steps: the method comprises the working procedures of material mixing, ball milling, atomization drying, cold isostatic pressing forming and hot isostatic pressing sintering.
The ball milling process comprises the following steps: ball-material ratio of wet grinding (6-4): 1, ball milling rotation speed of 60r/min, and wet milling time of 72-96 h.
Wherein the atomization drying process comprises the following steps: the inlet temperature of the atomization drying is 200 ℃, and the outlet temperature is lower than 60 ℃.
Wherein the cold isostatic pressing forming process has a cold isostatic pressure of 200 MPa.
Wherein the sintering temperature of the hot isostatic pressing sintering process is 1450-1500 ℃, and the heat preservation time is 60 min.
The hard alloy bar prepared by the method has the WC average grain size of 0.16-0.2 mu m and HV102550 or more, and the service life is not less than 100h under the water-sand mixing working condition of 300 MPa.
The invention has the beneficial effects that: the hard alloy bar for the water jet cutting sand pipe and the preparation method thereof have the characteristics of low preparation temperature, short process time, high production cost and high production efficiency. Not only improves the morphology of powder particles, but also improves the density of the alloy; but also effectively controls the growth of crystal grains, improves the hardness and the wear resistance of the alloy and prolongs the service life of the water jet cutter sand pipe.
Detailed Description
The invention provides a hard alloy bar for a water jet cutting sand pipe and a preparation method thereof, and the invention is further explained by combining with the embodiment.
Example 1:
selecting 0.2 μm WC powder, 0.5 μm ZrC powder and ZrB2Powder, 0.8 μm NbC powder as raw material, its components are: 0.5% of Co powder, 0.05% of ZrC powder and 0.05% of ZrB2Powder, 0.15% of NbC powder, 0.25% of VC powder and 0.35% of Cr3C2Powder and the balance of WC powder. To be provided withThe absolute alcohol is used as a ball milling medium, the ball-material ratio is 6:1, the ball milling rotation speed is 60r/min, and the wet milling time is 72 h. During atomization drying, the inlet temperature is 200 ℃, and the outlet temperature is lower than 60 ℃. And during compression molding, the cold isostatic pressing pressure is 200MPa, the hot isostatic pressing sintering pressure is 150MPa, the temperature is 1450 ℃, and the heat preservation time is 60 min.
The mean grain size of WC of the cemented carbide rods prepared in this example was 0.16. mu.m, HV102590, the water jet cutting sand pipe is processed, and the service life of the water jet cutting sand pipe reaches 100 hours under the standard working condition.
Example 2:
selecting 0.3 μm WC powder, 0.5 μm ZrC powder and ZrB powder2Powder, 0.8 μm NbC powder as raw material, its components are: 0.25% of Co powder, 0.25% of ZrC powder and 0.25% of ZrB2Powder, 0.75% of NbC powder, 0.15% of VC powder and 0.5% of Cr3C2Powder and the balance of WC powder. Absolute alcohol is used as a ball milling medium, the ball-material ratio is 5:1, the ball milling rotation speed is 60r/min, and the wet milling time is 84 h. During atomization drying, the inlet temperature is 200 ℃, and the outlet temperature is lower than 60 ℃. And during compression molding, the cold isostatic pressing pressure is 200MPa, the hot isostatic pressing sintering pressure is 150MPa, the temperature is 1480 ℃, and the heat preservation time is 60 min.
The mean grain size of WC of the cemented carbide rods prepared in this example was 0.18. mu.m, HV102570, the water jet cutting sand pipe is processed, and the service life reaches 100 hours under the standard working condition.
Example 3:
selecting 0.4 μm WC powder, 0.5 μm ZrC powder and ZrB powder2Powder, 0.8 μm NbC powder as raw material, its components are: 0.5 percent of ZrC powder and 0.5 percent of ZrB2Powder, 1.5% of NbC powder, 0.5% of VC powder and 0.15% of Cr3C2Powder and the balance of WC powder. Absolute alcohol is used as a ball milling medium, the ball-material ratio is 4:1, the ball milling rotation speed is 60r/min, and the wet milling time is 96 h. During atomization drying, the inlet temperature is 200 ℃, and the outlet temperature is lower than 60 ℃. And during compression molding, the cold isostatic pressing pressure is 200MPa, the hot isostatic pressing sintering pressure is 150MPa, the temperature is 1500 ℃, and the heat preservation time is 60 min.
Duromers prepared in this exampleThe WC average grain size of the gold bar was 0.2. mu.m, HV102550, the water jet cutting sand pipe is processed, and the service life reaches 100 hours under the standard working condition.
Claims (1)
1. The hard alloy bar for the water jet sand pipe is characterized by comprising the following chemical components in percentage by weight: 0 to 0.5 percent of Co powder, 0.05 to 0.5 percent of ZrC powder and 0.05 to 0.5 percent of ZrB2Powder, 0.15-1.5% of NbC powder, 0.15-0.5% of VC powder and 0.15-0.5% of Cr3C2Powder and the balance of WC powder;
the ZrC powder and the ZrB2The Fisher particle size of the NbC powder is 0.5 mu m, the Fisher particle size of the NbC powder is 0.8 mu m, and the Fisher particle size of the WC powder is 0.2-0.4 mu m;
the ZrC powder and the ZrB2The mass ratio of the powder to the NbC powder is 1:1: 3;
the WC average grain size of the hard alloy bar is 0.16-0.2 mu m, and HV10The service life of the water jet sand pipe is not less than 100h under the water-sand mixing working condition of 300 MPa;
the preparation method of the hard alloy bar for the water jet cutter sand pipe specifically comprises the following steps: the method comprises the working procedures of material mixing, ball milling, atomization drying, cold isostatic pressing forming and hot isostatic pressing sintering;
the ball milling process comprises the following steps: ball-material ratio of wet grinding (6-4): 1, ball milling rotation speed is 60r/min, and wet milling time is 72-96 h;
the atomization drying process comprises the following steps: the inlet temperature of atomization drying is 200 ℃, and the outlet temperature is lower than 60 ℃;
the cold isostatic pressing forming process has the cold isostatic pressure of 200 MPa;
the sintering temperature of the hot isostatic pressing sintering process is 1450-1500 ℃, and the heat preservation time is 60 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811233795.5A CN109504885B (en) | 2018-10-23 | 2018-10-23 | Hard alloy bar for water jet cutting sand pipe and preparation method thereof |
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| CN201811233795.5A CN109504885B (en) | 2018-10-23 | 2018-10-23 | Hard alloy bar for water jet cutting sand pipe and preparation method thereof |
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| CN109504885A CN109504885A (en) | 2019-03-22 |
| CN109504885B true CN109504885B (en) | 2020-08-28 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110449589A (en) * | 2019-09-05 | 2019-11-15 | 蓬莱市超硬复合材料有限公司 | Cold threaded hole bar forming method in one kind |
| CN110981488A (en) * | 2019-12-24 | 2020-04-10 | 有研工程技术研究院有限公司 | Ultrahigh-hardness aspheric glass lens mold material and preparation method thereof |
| CN112661514B (en) * | 2021-01-08 | 2022-08-19 | 厦门钨业股份有限公司 | Preparation method and mold of water jet sand pipe for ultrahigh pressure water cutting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4829964B1 (en) * | 1964-11-28 | 1973-09-14 | ||
| DE1815580C3 (en) * | 1967-12-21 | 1976-01-02 | Ugine-Carbone, Paris | Carbide based on WC with Tic, Tac, Nbc and Hfc as well as cobalt as binders |
| CN102628138A (en) * | 2012-03-23 | 2012-08-08 | 华南理工大学 | Trace cobalt-containing tungsten carbide without bonding phase and preparation method thereof |
| CN103667757A (en) * | 2013-12-12 | 2014-03-26 | 河南省大地合金股份有限公司 | Preparation method of hard alloy bar for PCB (Printed Circuit Board) micro drill |
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2018
- 2018-10-23 CN CN201811233795.5A patent/CN109504885B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4829964B1 (en) * | 1964-11-28 | 1973-09-14 | ||
| DE1815580C3 (en) * | 1967-12-21 | 1976-01-02 | Ugine-Carbone, Paris | Carbide based on WC with Tic, Tac, Nbc and Hfc as well as cobalt as binders |
| CN102628138A (en) * | 2012-03-23 | 2012-08-08 | 华南理工大学 | Trace cobalt-containing tungsten carbide without bonding phase and preparation method thereof |
| CN103667757A (en) * | 2013-12-12 | 2014-03-26 | 河南省大地合金股份有限公司 | Preparation method of hard alloy bar for PCB (Printed Circuit Board) micro drill |
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