CN111347094B - High-precision ultrathin tungsten steel blade and machining method thereof - Google Patents
High-precision ultrathin tungsten steel blade and machining method thereof Download PDFInfo
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- CN111347094B CN111347094B CN202010201828.9A CN202010201828A CN111347094B CN 111347094 B CN111347094 B CN 111347094B CN 202010201828 A CN202010201828 A CN 202010201828A CN 111347094 B CN111347094 B CN 111347094B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D19/00—Shearing machines or shearing devices cutting by rotary discs
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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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
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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
- C22C29/06—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 based on carbides, but not containing other metal compounds
- C22C29/067—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 based on carbides, but not containing other metal compounds comprising a particular metallic binder
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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
- C22C29/06—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 based on carbides, but not containing other metal compounds
- C22C29/08—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 based on carbides, but not containing other metal compounds based on tungsten carbide
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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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
Abstract
The invention discloses a high-precision ultrathin tungsten steel blade and a processing method thereof, and the high-precision ultrathin tungsten steel blade comprises a blade base body and a blade outer ring sleeved outside the blade base body, wherein the blade base body and the blade outer ring are of disc-shaped structures, the blade base body comprises an upper base plate positioned on the blade outer ring and a lower base plate positioned below the blade outer ring, an annular cutting edge is arranged on the outer side of the blade outer ring, a connecting inner hole is arranged in the center of the blade outer ring, connecting outer holes arranged in an annular array are arranged on the blade outer ring on the outer side of the connecting outer hole, the upper base plate and the lower base plate are symmetrically arranged on two sides of the blade outer ring, the upper base plate and the lower base plate are tightly pressed on the connecting inner hole and the connecting outer hole of the. According to the high-precision ultrathin tungsten steel blade and the processing method thereof, when the blade base body is installed corresponding to a lathe and a machine tool, the stability of the blade outer ring in use is improved, and therefore the hardness of the whole tungsten steel blade in cutting is improved.
Description
Technical Field
The invention belongs to the technical field of tungsten steel blades, and particularly relates to a high-precision ultrathin tungsten steel blade and a processing method thereof.
Background
The tungsten steel blade refers to a blade with a blade body which is partially or completely made of high-quality tungsten steel materials through a series of finish machining (such as wire cut electrical discharge machining, welding, precision grinding and mirror polishing), and is widely applied to mechanical special blades in various industries: such as woodworking machinery blades, packaging machinery blades, chemical machinery blades, food machinery blades, paper machinery blades, textile machinery blades, plastic machinery blades, electronic industry machinery blades, printing machinery blades and other special blades in industries.
The tungsten steel has a series of excellent performances such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, particularly high hardness and wear resistance, and basically remains unchanged even at the temperature of 500 ℃, and has high hardness at the temperature of 1000 ℃, so that tungsten steel blades are widely used, but the existing ultra-thin tungsten steel blades have the defects of inconvenient clamping and fixing due to low thinness of the tungsten steel blades when being installed and used on a corresponding machine tool or lathe, and poor stability of the whole body and influence on the using strength when the blades are used.
Disclosure of Invention
The invention aims to provide a high-precision ultrathin tungsten steel blade and a processing method thereof, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high-accuracy ultra-thin tungsten steel blade, includes blade base member and the outer blade outer lane of cover at the blade base member, the blade base member is discoid structure with the blade outer lane, and the blade base member is including being located the last base plate on the blade outer lane and being located the lower base plate under the blade outer lane, the outside of blade outer lane is equipped with annular cutting edge, and the center of blade outer lane is equipped with the connection hole, and is equipped with the connection outer hole that is the annular array setting on the blade outer lane in the connection hole outside the hole outside, go up base plate and infrabasal plate and set up at blade outer lane bilateral symmetry, and go up base plate and infrabasal plate and all compress tightly the connection hole and the connection outer hole in the blade outer lane, and the mounting.
Preferably, the bottom of the upper substrate and the bottom center of the lower substrate are respectively provided with a protruding block protruding from the bottom center of the upper substrate and a protruding block protruding from the bottom center of the lower substrate, the protruding blocks are of a cylindrical structure matched with the connecting inner hole, the connecting height of the two groups of protruding blocks is the same as the depth of the connecting inner hole, and the mounting hole is vertically communicated with the protruding blocks.
Preferably, a plurality of groups of convex columns arranged in an annular array are further convexly arranged on the upper substrate and the lower substrate on the outer sides of the two groups of convex blocks, the plurality of groups of convex blocks are matched in the connecting outer holes, and a group of connecting outer holes is filled between the upper group of convex blocks and the lower group of convex blocks.
Preferably, the blade consists of the following components in parts by weight: 85-90 parts of tungsten carbide, 5-10 parts of titanium carbide, 5-10 parts of cobalt powder, 8-10 parts of nickel powder, 1-3 parts of molybdenum carbide, 1-3 parts of zirconium carbide and 3-5 parts of chromium carbide.
Preferably, the blade consists of the following components in parts by weight: 85 parts of tungsten carbide, 5 parts of titanium carbide, 5 parts of cobalt powder, 8 parts of nickel powder, 1 part of molybdenum carbide, 1 part of zirconium carbide and 3 parts of chromium carbide.
Preferably, the blade consists of the following components in parts by weight: 88 parts of tungsten carbide, 8 parts of titanium carbide, 8 parts of cobalt powder, 9 parts of nickel powder, 2 parts of molybdenum carbide, 2 parts of zirconium carbide and 4 parts of chromium carbide.
Preferably, the blade consists of the following components in parts by weight: 90 parts of tungsten carbide, 10 parts of titanium carbide, 10 parts of cobalt powder, 10 parts of nickel powder, 3 parts of molybdenum carbide, 3 parts of zirconium carbide and 5 parts of chromium carbide.
Preferably, the particle size of the zirconium carbide is 200-500nm, the particle size of the chromium carbide is 300-800nm, and the particle size of the molybdenum carbide is 400-600 nm.
A processing method of a high-precision ultrathin tungsten steel blade comprises the following steps:
s1, selecting and stamping: selecting tungsten carbide, titanium carbide, cobalt powder, nickel powder, molybdenum carbide, zirconium carbide and chromium carbide in certain parts by weight, stamping the tungsten carbide, titanium carbide, cobalt powder, nickel powder, molybdenum carbide, zirconium carbide and chromium carbide according to the shapes of the blade substrate and the blade outer ring, and pressing the tungsten carbide, titanium carbide, cobalt powder, nickel powder, molybdenum carbide, zirconium carbide and chromium carbide into a required shape;
s2, preheating and sintering: placing the punched blade substrate and the punched blade outer ring in S1 in a heating furnace for preheating, placing the blade substrate and the punched blade outer ring in a sintering furnace for primary heating to 700-;
s3, press forming: pressing the sintered blade base body and the blade outer ring together according to requirements in the step S2, inserting the two groups of bumps of the blade base body into the connecting inner hole of the blade outer ring, and inserting the bumps of the blade base body into the connecting outer hole of the blade outer ring;
s4, welding and fixing: after the blade substrate and the blade outer ring are pressed and formed in S3, coating welding powder on the joint of the blade substrate and the blade outer ring, and then welding by using a silver-containing welding strip to complete the forming of the whole tungsten steel blade;
s5, machining: using a lathe machine to carry out surface polishing, deburring, oil immersion and electroplating on the tungsten steel blade molded in the step S3, keeping the surface of the tungsten steel blade smooth, and carrying out corresponding protection treatment on the surface to obtain the finally finished tungsten steel blade;
s6, checking and packaging: after the tungsten steel blade is machined in S5, the tungsten steel blade is subjected to parallelism, dimensional accuracy and heat treatment hardness detection, the thickness tolerance of the tungsten steel blade is enabled to be within +/-0.005 mm, and packaging and transportation are carried out after the detection is finished.
Preferably, in S1, the thickness of the blade outer ring 1 is 2-6mm, and the thickness of the blade base body 2 is 4-10 mm.
Preferably, in S2, the preheating temperature is 300-500 ℃, the time is 0.5-1 hour, the primary heating time is 1-1.5 hours, the reheating time is 1-2 hours, and the final heating time is 0.5-1 hour.
Preferably, in S4, the heating temperature of the welding rod is controlled at 700 ℃ to 800 ℃, and the silver content in the silver-containing welding rod is controlled at 51-56 wt%.
The invention has the technical effects and advantages that:
1. the blade comprises the following components in parts by weight: 85-90 parts of tungsten carbide, 5-10 parts of titanium carbide, 5-10 parts of cobalt powder, 8-10 parts of nickel powder, 1-3 parts of molybdenum carbide, 1-3 parts of zirconium carbide and 3-5 parts of chromium carbide; the composition comprises the following components in parts by weight: 85-90 parts of tungsten carbide, 5-10 parts of titanium carbide, 5-10 parts of cobalt powder, 8-10 parts of nickel powder, 1-3 parts of molybdenum carbide, 1-3 parts of zirconium carbide and 3-5 parts of chromium carbide; the added nano-scale molybdenum carbide, zirconium carbide and chromium carbide can effectively inhibit overgrowth of carbide grains in the sintering process, so that refined grain chromium carbide can be completely dissolved in the binder phase in the re-sintering process, the solubility of tungsten carbide in the binder phase is reduced, the molybdenum carbide, the zirconium carbide and the chromium carbide are dissolved in the binder phase in a solid mode and are segregated at a WC/Co interface, small-grain tungsten carbide grains are prevented from being transferred on large-grain tungsten carbide grains through a dissolution-precipitation mechanism, the growth of the grains is inhibited, and the mechanical property of tungsten steel is ensured. Meanwhile, the use amounts of the molybdenum carbide, the zirconium carbide and the chromium carbide are respectively controlled to be 1-3 parts, 1-3 parts and 3-5 parts, so that the densification process of the tungsten steel is not influenced, and the tungsten steel is enabled to leave residual gaps to reduce the hardness of the tungsten steel.
2. According to the high-precision ultrathin tungsten steel blade and the processing method thereof, the tungsten steel blade is divided into the blade outer ring and the blade base body, the thickness of the blade base body is larger than that of the blade outer ring, and the blade base body and the blade outer ring are fixed in a mode of pressing and then welding, so that when the ultrathin tungsten steel blade is produced, the blade base body can be arranged on a corresponding lathe and a machine tool, the stability of the blade outer ring in use is improved, and the hardness of the integral tungsten steel blade in cutting is improved; meanwhile, the outer ring of the blade of the tungsten steel blade and the blade base body are firstly punched and then sintered and machined in the machining process, so that the overall machining efficiency is higher, the effect of connection and fixation is better due to the design of clamping during welding, the problem of low strength of a welding position is solved, and the tungsten steel blade is more convenient to install correspondingly with a machine tool and a lathe.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded schematic view of the present invention;
fig. 3 is a front view of the present invention.
In the figure: the cutting tool comprises a blade outer ring 1, a blade base body 2, a mounting hole 3, a cutting edge 4, a connecting inner hole 5, a connecting outer hole 6, an upper substrate 7, a lower substrate 8, a lug 9 and a convex column 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 provides a high-precision ultrathin tungsten steel blade as shown in figures 1-3, which comprises a blade base body 2 and a blade outer ring 1 sleeved outside the blade base body 2, the blade base body 2 and the blade outer ring 1 are both of a disc-shaped structure, the blade base body 2 comprises an upper substrate 7 positioned on the blade outer ring 1 and a lower substrate 8 positioned below the blade outer ring 1, the outer side of the blade outer ring 1 is provided with an annular cutting edge 4, the center of the blade outer ring 1 is provided with a connecting inner hole 5, and the blade outer ring 1 outside the connecting inner hole 6 is provided with connecting outer holes 6 arranged in an annular array, the upper substrate 7 and the lower substrate 8 are symmetrically arranged at two sides of the blade outer ring 1, and the upper substrate 7 and the lower substrate 8 are both pressed on the inner connecting hole 5 and the outer connecting hole 6 of the blade outer ring 1, and the centers of the upper substrate 7 and the lower substrate 8 are both provided with a through mounting hole 3.
Preferably, the bottom end of the upper substrate 7 and the bottom end center position of the lower substrate 8 are respectively provided with a protruding block 9 protruding from the bottom end of the connecting inner hole 5, the height of the two groups of protruding blocks 9 is the same as the depth of the connecting inner hole 5, and the mounting hole 3 vertically penetrates through the protruding blocks 9.
Preferably, a plurality of groups of convex columns 10 arranged in an annular array are further convexly arranged on the upper substrate 7 and the lower substrate 8 at the outer sides of the two groups of convex blocks 9, the plurality of groups of convex blocks 9 are matched in the connecting outer holes 6, and a group of connecting outer holes 6 is filled between the upper group of convex blocks 9 and the lower group of convex blocks 9.
Preferably, the blade consists of the following components in parts by weight: 85-90 parts of tungsten carbide, 5-10 parts of titanium carbide, 5-10 parts of cobalt powder, 8-10 parts of nickel powder, 1-3 parts of molybdenum carbide, 1-3 parts of zirconium carbide and 3-5 parts of chromium carbide.
Preferably, the blade consists of the following components in parts by weight: 85 parts of tungsten carbide, 5 parts of titanium carbide, 5 parts of cobalt powder, 8 parts of nickel powder, 1 part of molybdenum carbide, 1 part of zirconium carbide and 3 parts of chromium carbide.
Preferably, the blade consists of the following components in parts by weight: 88 parts of tungsten carbide, 8 parts of titanium carbide, 8 parts of cobalt powder, 9 parts of nickel powder, 2 parts of molybdenum carbide, 2 parts of zirconium carbide and 4 parts of chromium carbide.
Preferably, the blade consists of the following components in parts by weight: 90 parts of tungsten carbide, 10 parts of titanium carbide, 10 parts of cobalt powder, 10 parts of nickel powder, 3 parts of molybdenum carbide, 3 parts of zirconium carbide and 5 parts of chromium carbide.
The grain diameter of the zirconium carbide is 200-500nm, the grain diameter of the chromium carbide is 300-800nm, and the grain diameter of the molybdenum carbide is 400-600 nm.
A processing method of a high-precision ultrathin tungsten steel blade comprises the following steps:
s1, selecting and stamping: selecting tungsten carbide, titanium carbide, cobalt powder, nickel powder, molybdenum carbide, zirconium carbide and chromium carbide in certain parts by weight, stamping the tungsten carbide, titanium carbide, cobalt powder, nickel powder, molybdenum carbide, zirconium carbide and chromium carbide according to the shapes of the blade substrate 2 and the blade outer ring 1, and pressing the tungsten carbide, titanium carbide, cobalt powder, nickel powder, molybdenum carbide, zirconium carbide and chromium carbide into required shapes;
s2, preheating and sintering: the blade substrate 2 and the blade outer ring 1 which are punched in the step S1 are placed in a heating furnace for preheating, the blade substrate and the blade outer ring are placed in a sintering furnace for preheating, the preheating is carried out, the temperature is initially increased to 800 ℃ for initial sintering treatment, then the temperature is continuously increased to 1050 ℃ for continuous sintering treatment, in the heating process, gaps between tungsten carbide particles and other particles are gradually reduced, the linear black part almost disappears, only large black parts are remained, and therefore the particle connection combination is strengthened, and finally when the temperature is slowly increased to 1500 ℃ for 1100 ℃, the sintering is finished, and the temperature is slowly reduced.
S3, press forming: pressing the blade base body 2 and the blade outer ring 1 which are sintered in the step S2 together according to requirements, so that two groups of bumps 9 of the blade base body 2 are inserted into the connecting inner hole 5 of the blade outer ring 1, and the convex columns 10 of the blade base body 2 are inserted into the connecting outer hole 6 of the blade outer ring 1;
s4, welding and fixing: after the blade base body 2 and the blade outer ring 1 are pressed and formed in S3, welding powder is coated at the joint of the blade base body 2 and the blade outer ring 1, and then a silver-containing welding strip is used for welding, so that the forming of the integral tungsten steel blade is completed;
s5, machining: using a lathe machine to carry out surface polishing, deburring, oil immersion and electroplating on the tungsten steel blade molded in the step S3, keeping the surface of the tungsten steel blade smooth, and carrying out corresponding protection treatment on the surface to obtain the finally finished tungsten steel blade;
s6, checking and packaging: after the tungsten steel blade is machined in S5, the tungsten steel blade is subjected to parallelism, dimensional accuracy and heat treatment hardness detection, the thickness tolerance of the tungsten steel blade is enabled to be within +/-0.005 mm, and packaging and transportation are carried out after the detection is finished.
Example 1:
in S1, 85 parts of tungsten carbide, 5 parts of titanium carbide, 5 parts of cobalt powder, 8 parts of nickel powder, 1 part of molybdenum carbide, 1 part of zirconium carbide and 3 parts of chromium carbide are pressed to form the blade outer ring 1, wherein the thickness of the blade outer ring is 2mm, and the thickness of the blade substrate 2 is 4 mm. The grain size of the zirconium carbide is 200nm, the grain size of the chromium carbide is 300nm, and the grain size of the molybdenum carbide is 400 nm.
In S2, the preheating temperature was 300 ℃, the time was 0.5 hour, the preliminary heating time was 1 hour, the reheating time was 1 hour, and the final heating time was 0.5 hour.
In S4, the heating temperature of the welding rod is controlled at 700 ℃, and the silver content in the silver-containing welding rod is controlled at 51%.
Example 2:
in S1, 88 parts of tungsten carbide, 8 parts of titanium carbide, 8 parts of cobalt powder, 9 parts of nickel powder, 2 parts of molybdenum carbide, 2 parts of zirconium carbide and 4 parts of chromium carbide are pressed into the blade outer ring 1, wherein the thickness of the blade outer ring is 4mm, and the thickness of the blade substrate 2 is 7 mm. The grain size of the zirconium carbide is 400nm, the grain size of the chromium carbide is 500nm, and the grain size of the molybdenum carbide is 500 nm.
In S2, the preheating temperature was 400 ℃, the time was 0.5 hour, the preliminary heating time was 1 hour, the reheating time was 1.5 hours, and the final heating time was 1 hour.
In S4, the heating temperature of the welding rod is controlled at 750 ℃, and the silver content in the silver-containing welding rod is controlled at 53%.
Example 3:
in S1, 90 parts of tungsten carbide, 10 parts of titanium carbide, 10 parts of cobalt powder, 10 parts of nickel powder, 3 parts of molybdenum carbide, 3 parts of zirconium carbide and 5 parts of chromium carbide are pressed to form the blade outer ring 1 with the thickness of 6mm, and the blade substrate 2 with the thickness of 10 mm. The grain size of the zirconium carbide is 500nm, the grain size of the chromium carbide is 800nm, and the grain size of the molybdenum carbide is 600 nm.
In S2, the preheating temperature was 500 ℃, the time was 1 hour, the preliminary heating time was 1.5 hours, the reheating time was 2 hours, and the final heating time was 1 hour.
In S4, the heating temperature of the welding rod is controlled at 800 ℃, and the silver content in the silver-containing welding rod is controlled at 56%.
Comparative example 1
Comparative example 1 differs from example 2 in that: in comparative example 1, zirconium carbide, chromium carbide and molybdenum carbide were not added;
comparative example 2
Comparative example 2 differs from example 2 in that: the grain diameters of the zirconium carbide, the chromium carbide and the molybdenum carbide added in the comparative example 2 are not nano-scale;
comparative example 3
Comparative example 3 differs from example 2 in that: in comparative example 2 no chromium carbide was added;
table 1 shows the performance tests on the blades of examples 1-3 and comparative examples 1-3:
TABLE 1
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Hardness (HRC) | 67.2 | 68.1 | 67.6 | 62.2 | 64.7 | 65.8 |
| Bending strength (MPa) | 3596.3 | 3601.3 | 3591.6 | 3356.6 | 3462.3 | 3496.3 |
| Impact toughness (J/cm)2) | 47.8 | 48.6 | 48.1 | 40.4 | 42.3 | 44.8 |
| Fracture toughness (MPa. m)1/2) | 43.2 | 44.5 | 43.7 | 38.5 | 40.7 | 41.6 |
Therefore, the tungsten steel blade has better hardness, bending strength, impact toughness and fracture toughness.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalent substitutions and modifications may be made to some features of the embodiments described above, and any modifications, equivalents, improvements, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. The utility model provides a high-accuracy ultra-thin tungsten steel blade, includes blade base member (2) and cover blade outer lane (1) outside blade base member (2), its characterized in that: the blade outer ring (1) and the blade base body (2) are of disc-shaped structures, the blade base body (2) comprises an upper base plate (7) located on the blade outer ring (1) and a lower base plate (8) located below the blade outer ring (1), an annular cutting edge (4) is arranged on the outer side of the blade outer ring (1), a connecting inner hole (5) is formed in the center of the blade outer ring (1), connecting outer holes (6) arranged in an annular array are formed in the blade outer ring (1) on the outer side of the connecting outer hole (6), the upper base plate (7) and the lower base plate (8) are symmetrically arranged on two sides of the blade outer ring (1), the upper base plate (7) and the lower base plate (8) are tightly pressed on the connecting inner hole (5) and the connecting outer hole (6) of the blade outer ring (1), and through mounting holes (3) are formed in the centers of the upper base plate (7);
the bottom end of the upper substrate (7) and the bottom end of the lower substrate (8) are respectively provided with a convex block (9) which is matched with the connecting inner hole (5) in a protruding mode and has a cylindrical structure, the connecting height of the two groups of convex blocks (9) is the same as the depth of the connecting inner hole (5), and the mounting hole (3) vertically penetrates through the convex blocks (9);
a plurality of groups of convex columns (10) arranged in an annular array are further convexly arranged on the upper substrate (7) and the lower substrate (8) at the outer sides of the two groups of convex blocks (9), the plurality of groups of convex blocks (9) are matched in the connecting outer holes (6), and a group of connecting outer holes (6) are filled between the upper group of convex blocks (9) and the lower group of convex blocks (9);
the blade comprises the following components in parts by weight: 85-90 parts of tungsten carbide, 5-10 parts of titanium carbide, 5-10 parts of cobalt powder, 8-10 parts of nickel powder, 1-3 parts of molybdenum carbide, 1-3 parts of zirconium carbide and 3-5 parts of chromium carbide;
the processing method of the high-precision ultrathin tungsten steel blade is characterized by comprising the following steps of:
s1, selecting and stamping: selecting tungsten carbide, titanium carbide, cobalt powder, nickel powder, molybdenum carbide, zirconium carbide and chromium carbide in certain parts by weight, stamping the tungsten carbide, titanium carbide, cobalt powder, nickel powder, molybdenum carbide, zirconium carbide and chromium carbide according to the shapes of the blade substrate (2) and the blade outer ring (1), and pressing the tungsten carbide, titanium carbide, cobalt powder, nickel powder, molybdenum carbide, zirconium carbide and chromium carbide into required shapes;
s2, preheating and sintering: placing the blade substrate (2) and the blade outer ring (1) which are punched in the step S1 in a heating furnace for preheating, placing the blade substrate and the blade outer ring in a sintering furnace for preheating, primarily heating the blade substrate to 800 ℃ for primary sintering treatment, then continuously heating the blade substrate to 1050 ℃ for continuous sintering treatment, and finally slowly cooling the blade substrate and the blade outer ring when the temperature is slowly 1500 ℃ for 1100 ℃ for sintering;
s3, press forming: pressing the blade base body (2) and the blade outer ring (1) which are sintered in the step S2 together according to requirements, inserting two groups of bumps (9) of the blade base body (2) into a connecting inner hole (5) of the blade outer ring (1), and inserting a convex column (10) of the blade base body (2) into a connecting outer hole (6) of the blade outer ring (1);
s4, welding and fixing: after the blade base body (2) and the blade outer ring (1) are pressed and formed in S3, welding powder is coated on the joint of the blade base body (2) and the blade outer ring (1), and then a silver-containing welding strip is used for welding to complete the forming of the integral tungsten steel blade;
s5, machining: using a lathe machine to carry out surface polishing, deburring, oil immersion and electroplating on the tungsten steel blade molded in the step S3, keeping the surface of the tungsten steel blade smooth, and carrying out corresponding protection treatment on the surface to obtain the finally finished tungsten steel blade;
s6, checking and packaging: after the tungsten steel blade is machined in S5, detecting the parallelism, the dimensional accuracy and the heat treatment hardness of the tungsten steel blade to ensure that the thickness tolerance is within +/-0.005 mm, and packaging and transporting after the detection is finished;
s1, the thickness of the blade outer ring (1) is 2-6mm, and the thickness of the blade base body (2) is 4-10 mm;
in S2, the preheating temperature is 300-500 ℃, the time is 0.5-1 hour, the preliminary heating time is 1-1.5 hours, the reheating time is 1-2 hours, and the final heating time is 0.5-1 hour;
in S4, the heating temperature of the welding rod is controlled at 700 ℃ and 800 ℃, and the silver content in the silver-containing welding rod is controlled at 51-56 wt%.
2. The high-precision ultra-thin tungsten steel blade of claim 1, characterized in that: the blade comprises the following components in parts by weight: 85 parts of tungsten carbide, 5 parts of titanium carbide, 5 parts of cobalt powder, 8 parts of nickel powder, 1 part of molybdenum carbide, 1 part of zirconium carbide and 3 parts of chromium carbide.
3. The high-precision ultra-thin tungsten steel blade of claim 1, characterized in that: the blade comprises the following components in parts by weight: 88 parts of tungsten carbide, 8 parts of titanium carbide, 8 parts of cobalt powder, 9 parts of nickel powder, 2 parts of molybdenum carbide, 2 parts of zirconium carbide and 4 parts of chromium carbide.
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