CN113894505B - Composite cutter blank and preparation method thereof - Google Patents
Composite cutter blank and preparation method thereof Download PDFInfo
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- CN113894505B CN113894505B CN202111270178.4A CN202111270178A CN113894505B CN 113894505 B CN113894505 B CN 113894505B CN 202111270178 A CN202111270178 A CN 202111270178A CN 113894505 B CN113894505 B CN 113894505B
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- 238000002360 preparation method Methods 0.000 title abstract description 9
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- 239000010935 stainless steel Substances 0.000 claims abstract description 31
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- 238000005098 hot rolling Methods 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 16
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- 239000012535 impurity Substances 0.000 claims description 7
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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
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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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B9/00—Blades for hand knives
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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
- C22C38/02—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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Abstract
The invention discloses a composite knife blank and a preparation method thereof, wherein the composite knife blank comprises a knife body, wherein the front end of the knife body is provided with a knife edge; the knife body is made of 2Cr13 stainless steel or 3Cr13 stainless steel; the cutting edge is prepared from 10Cr15MoV alloy powder, the cutting edge is wrapped on at least three sides of the cutter body, and the cutting edge is metallurgically bonded with the cutter body. The composite knife blank comprises a knife body and a knife edge arranged at the front end of the knife body, wherein the knife edge is made of 10Cr15MoV alloy powder and has high hardness and wear resistance, the knife body is made of a low-carbon stainless steel material 3Cr13 or 2Cr13 and has good corrosion resistance and toughness, and the knife body and the knife edge are metallurgically compounded, so that the double-metal composite knife blank fully exerts the advantages of the low-carbon stainless steel material and the alloy powder material, has good corrosion resistance, good sharpness and sharpness durability, only the knife edge is made of the 10Cr15MoV alloy powder, the cost of the composite knife blank is reduced, and mass production can be realized.
Description
Technical Field
The invention relates to the field of civil kitchen knives, in particular to a composite knife blank. In addition, the invention also relates to a preparation method of the composite cutter blank.
Background
China is a large country for producing kitchen knives, and according to the statistical data of' 2020-2026 years published by international consulting of China, market research and investment potential prediction report of kitchen knife industry in China, the statistical data shows that: the market scale of the kitchen tool industry in China reaches 439 billion yuan by 2020, china accounts for more than 95% of the world's middle and low-end knife and scissors market, however, high-end knife and scissors are divided by China such as Japan (50%), germany (20%), switzerland, italy, sweden, USA, korea and the like.
The kitchen knife industry in China develops rapidly, and the yield, the types and the like of knives are positioned in the front of the world, so that the kitchen knife industry is an important kitchen knife production base in the world. However, the industry development has been in a bottleneck at present, and kitchen knife manufacturers are facing the problems of intense competition and serious profit decline. At present, the production technology of cutter products is insufficient, so that the low-end and medium-end cutter products are more, the competition is fierce, the added value is low, and the profit rate is reduced year by year. There is no large steel mill for producing high-end and high-quality cutter material in China, the main cutter material is 2Cr13, 3Cr13 (420), 4Cr13, 5Cr15 and the like, and the high-end material still needs to be imported.
The kitchen knife produced by adopting common materials is difficult to meet the requirements of good sharpness and durability of sharpness, good corrosion resistance and low price. Although the most commonly used kitchen knife tools made of stainless steel such as 2Cr13, 3Cr13, 4Cr13, etc. on the market solve the problem of rust prevention, the hardness of the tools is not satisfactory, the hardness of general stainless steel after quenching is HRC 40-55, the sharpness and the durability of the sharpness of the tools are poor, and the edge curling phenomenon is easy to occur when cutting hard articles. The high-carbon steel knife needs to have good sharpness and sharpness durability, but has poor corrosion resistance and is easy to rust. The powder stainless steel has the characteristics of corrosion resistance, high sharpness and durability, high hardness and the like, but is expensive and difficult to be accepted by the public. Therefore, the development of a cutter blank material with high sharpness, high hardness, good corrosion resistance and low price is a problem to be solved in the field.
Disclosure of Invention
The invention provides a composite cutter blank and a preparation method thereof, and aims to solve the technical problem of how to obtain a cutter blank with high sharpness, high hardness, good corrosion resistance and low price.
The technical scheme adopted by the invention is as follows:
a composite knife blank comprises a knife body, wherein the front end of the knife body is provided with a knife edge; the knife body is made of 2Cr13 stainless steel or 3Cr13 stainless steel; the blade is prepared from 10Cr15MoV alloy powder; the blade body wraps the cutting edge on at least three sides, and the cutting edge is metallurgically bonded with the blade body.
Furthermore, the 10Cr15MoV alloy powder material comprises 1.0-1.2% of C, 0.2-0.6% of Si, 0.2-0.55% of Mn, 13-15% of Cr, 2.5-4% of Mo, 1.5-2% of V, and the balance of Fe and inevitable impurities.
Furthermore, the oxygen content of the 10Cr15MoV alloy powder adopted by the cutting edge is less than or equal to 200ppm; and/or the cutting edge adopts 10Cr15MoV alloy powder with the granularity less than or equal to 250 mu m; and/or the thickness of the blade is 20-30% of the thickness of the blade body and is not less than 0.5mm.
According to another aspect of the invention, a preparation method of the composite cutter blank comprises the following steps:
processing a knife body: processing 2Cr13 stainless steel or 3Cr13 stainless steel into a plate blank;
processing a cutting edge: forming a groove or a blind hole in the side wall of the plate blank along the horizontal direction, filling 10Cr15MoV alloy powder into the groove or the blind hole, covering a cover plate at the opening of the groove or the blind hole, vacuumizing to form vacuum inside the groove or the blind hole, and sealing and connecting the cover plate with the groove or the blind hole to form a composite blank;
hot rolling: carrying out hot rolling on the composite blank to roll the composite blank into a composite cutter material with the thickness of 2-5 mm;
and (3) post-treatment: and removing the cover plate at the front end of the composite cutter material to expose the cutting edge to obtain a composite cutter blank.
Further, the length of the plate blank is 3-6 m, the width is 70-120 mm, and the thickness is 30-60 mm.
Furthermore, the grooves are rectangular grooves, and the blind holes are rectangular blind holes; the length of the rectangular groove or the rectangular blind hole is 2mm less than that of the plate blank, the thickness is 10 mm-15 mm, and the depth is 10 mm-20 mm.
Further, in the process of machining the cutting edge, 10Cr15MoV alloy powder is filled in the groove or the blind hole, and the 10Cr15MoV alloy powder in the groove or the blind hole is compacted; the tap density of the 10Cr15MoV alloy powder is 6.5g/cm 3 ～7.5g/cm 3 。
Further, in the process of machining the cutting edge, the vacuum degree in the groove after vacuumizing treatment is 0.001 Pa-0.01 Pa; and/or in the process of machining the cutting edge, the cover plate is in sealing connection with the groove or the blind hole by adopting one of electron beam welding, laser welding or argon arc welding.
Furthermore, the cover plate is made of 2Cr13 stainless steel or 3Cr13 stainless steel; the thickness of the cover plate is 1 mm-2 mm.
Further, the hot rolling specifically includes: the heating temperature of the plate blank is controlled to be 1200-1250 ℃, the heating and heat preservation time is 6-8 h, the initial rolling temperature is 1050-1200 ℃, the first rolling deformation is controlled to be more than or equal to 20% in the rolling process, and the final rolling temperature of the plate is controlled to be more than or equal to 950 ℃.
The invention has the following beneficial effects:
the composite knife blank comprises a knife body and a knife edge arranged at the front end of the knife body, wherein the knife edge is made of 10Cr15MoV alloy powder and has high hardness and wear resistance, the knife body is made of 3Cr13 or 2Cr13 materials and has good corrosion resistance and toughness, and the knife body and the knife edge are metallurgically compounded, so that the advantages of low-carbon stainless steel materials and alloy powder materials are fully exerted, the composite knife blank has good corrosion resistance and good sharpness and durability, and only the knife edge is made of the 10Cr15MoV alloy powder, so that the cost of the composite knife blank is reduced, and mass production can be realized.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a right side view of a fluted blade body according to a preferred embodiment of the present invention;
FIG. 2 is a front view of a fluted blade according to a preferred embodiment of the invention;
FIG. 3 is a schematic view of a preferred embodiment of the present invention blade loaded with 10Cr15MoV alloy powder;
FIG. 4 is a composite blade blank with the cover plate removed according to the preferred embodiment of the present invention; and
fig. 5 shows a composite blank according to a preferred embodiment of the present invention after grinding to prepare a kitchen knife.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 4, the composite knife blank of the present embodiment includes a knife body, and a cutting edge is disposed at the front end of the knife body; the knife body is made of 2Cr13 stainless steel or 3Cr13 stainless steel; the blade is prepared from 10Cr15MoV alloy powder; the blade body wraps the cutting edge on at least three sides, and the cutting edge is metallurgically bonded with the blade body.
The composite knife blank comprises a knife body and a knife edge arranged at the front end of the knife body, wherein the knife edge is made of 10Cr15MoV alloy powder and has high hardness and wear resistance, the knife body is made of 3Cr13 or 2Cr13 materials and has good corrosion resistance and toughness, and the knife body and the knife edge are metallurgically compounded, so that the advantages of low-carbon stainless steel materials and alloy powder materials are fully exerted, the composite knife blank has good corrosion resistance and good sharpness and durability, and only the knife edge is made of 10Cr15MoV alloy powder, so that the cost of the composite knife blank is reduced, and mass production can be realized.
In this embodiment, the 10Cr15MoV alloy powder material includes 1.0% to 1.2% of C, 0.2% to 0.6% of Si, 0.2% to 0.55% of Mn, 13% to 15% of Cr, 2.5% to 4% of Mo, 1.5% to 2% of V, and the balance of Fe and unavoidable impurities. The 10Cr15MoV alloy powder is produced by adopting a vacuum gas atomization powder preparation process.
In the embodiment, the oxygen content of the 10Cr15MoV alloy powder adopted by the cutting edge is less than or equal to 200ppm. The cutting edge adopts 10Cr15MoV alloy powder with the granularity less than or equal to 250 mu m. The performance indexes of the cutting edge are three, namely the corrosion resistance, the sharpness and sharpness retention and the toughness. The main influence on the corrosion resistance is the alloy composition, and the higher the CR content in the alloy composition is, the better the corrosion resistance is. In addition, the lower the carbon content, the better the corrosion resistance, but reducing the carbon content affects the hardness and sharpness. The main influences on the sharpness, sharpness retention and toughness are alloy components, the purity and the structure grain size of the alloy, the higher the contents of CR, mo, V and C in the alloy components are, the higher the hardness is, the better the wear resistance is, and the better the sharpness and sharpness retention are correspondingly. But the high alloy content and the poor toughness; the purer the alloy composition and the smaller the structure grain size, the better the toughness of the alloy. It is understood that the lower the oxygen content, the higher the purity of the alloy produced and the better the toughness. The smaller the grain size, the smaller the grain size of the microstructure of the alloy produced and the better the toughness. Therefore, the cutting edge adopts 10Cr15MoV alloy powder with oxygen content less than or equal to 200ppm and granularity less than or equal to 250 microns to obtain the cutting edge with high toughness, strong corrosion resistance, high sharpness and sharpness retention. Preferably, the thickness of the blade is 20% -30% of the thickness of the blade body and is not less than 0.5mm.
As shown in fig. 1, 2, 3 and 4, according to another aspect of the present invention, there is also provided a method for manufacturing a composite blade blank, including the steps of:
processing a knife body: processing 2Cr13 stainless steel or 3Cr13 stainless steel into a plate blank;
processing a cutting edge: forming a groove or a blind hole in the side wall of the plate blank along the horizontal direction, filling 10Cr15MoV alloy powder into the groove or the blind hole, covering a cover plate at the opening of the groove or the blind hole, vacuumizing to form vacuum inside the groove or the blind hole, and sealing and connecting the cover plate with the groove or the blind hole to form a composite blank;
hot rolling: carrying out hot rolling on the composite blank to roll the composite blank into a composite cutter material with the thickness of 2-5 mm;
and (3) post-treatment: and removing the cover plate at the front end of the composite cutter material to expose the cutting edge to obtain a composite cutter blank.
The preparation method of the composite cutter blank comprises the steps of processing a 2Cr13 or 3Cr13 plate into a plate blank, forming a groove or a blind hole in the plate blank, filling 10Cr15MoV alloy powder into the groove or the blind hole, covering a cover plate at the opening of the groove or the blind hole, carrying out vacuumizing and hot rolling treatment, and removing the cover plate to expose a cutting edge. According to the preparation method of the composite cutter blank, the plate blank is processed into the semi-enclosed groove or blind hole, so that alloy powder can be conveniently filled, meanwhile, a closed cavity can be formed by welding the cover plate on one surface, and the production and the manufacture are convenient. The 10Cr15MoV alloy powder is combined with two metals of a 2Cr13 or 3Cr13 plate, and under the condition of a clean interface, the two different materials are in diffusion connection under the action of high temperature and high pressure, so that the aim of metallurgical bonding is fulfilled. The purpose of vacuumizing is to ensure the clean interface of the two materials, not to be polluted to influence the bonding strength and also to prevent the surface oxidation from influencing the bonding quality in the subsequent heating and rolling process. The hot rolling comprises two processes of heating and rolling, the purpose of heating is that the hardness of the metal is reduced after heating, the plasticity is improved, the rolling force behind is reduced, and the two metals are convenient to thermally diffuse and combine. The purpose of rolling is to apply pressure to the metal to deform and thin it, while facilitating the bonding of the two metals.
In the embodiment, the length of the plate blank is 3-6 m, the width is 70-120 mm, and the thickness is 30-60 mm.
In this embodiment, the recess adopts the rectangle recess, and the blind hole adopts the rectangle blind hole. The length of the rectangular groove or the rectangular blind hole is 2mm less than that of the plate blank, the thickness is 10 mm-15 mm, and the depth is 10 mm-20 mm.
The length direction of the groove or the blind hole is 2mm less than the length of the plate blank, so that the groove or the blind hole is convenient to process. The thickness is 10 mm-15 mm, the depth is 10 mm-20 mm, the dimension of the blade after rolling into the knife blank is ensured, and the requirement that the thickness of the blade is 20% -30% of the thickness of the knife body and is not less than 0.5mm is met. The size of the cutting edge is too small, so that the subsequent production of finished product cutters is inconvenient for industrial production, and the cost is increased if the size of the cutting edge is too large. And (3) processing the slab, removing part of a matrix of the slab to form a groove or a blind hole for filling 10Cr15MoV alloy powder, and cleaning the inner surface of the groove or the blind hole after the groove or the blind hole is processed without oil stains, impurities, oxides and the like. Preferably, the length of the rectangular groove or the rectangular blind hole is 2mm less than the length of the slab, and the wall thickness of the rectangular groove or the rectangular blind hole in the length direction can also be considered as 1mm, so that the processing of the groove or the blind hole wall in the length direction is noticed when processing the groove or the blind hole, and cracks or fissures are prevented from occurring.
In this embodiment, during the processing of the cutting edge, the 10Cr15MoV alloy powder is filled in the groove, and the 10Cr15MoV alloy powder in the groove or blind hole is compacted. The compactness of the 10Cr15MoV alloy powder is 6.5g/cm 3 ～7.5g/cm 3 。
In the embodiment, in the blade machining process, the vacuum degree in the groove or the blind hole after the vacuum pumping treatment is 0.001 Pa-0.01 Pa. And/or in the process of processing the cutting edge, the cover plate is hermetically connected with the groove or the blind hole by adopting one of electron beam welding, laser welding or argon arc welding. In the process of processing the cutting edge, the cover plate is covered at the opening of the groove or the blind hole, and the cover plate covers the opening in one aspect, so that the 10Cr15MoV alloy powder is prevented from falling off, and the external gas is prevented from entering the groove or the blind hole and carrying out oxidation reaction with the 10Cr15MoV alloy powder; on the other hand, the cover plate covers the opening of the groove or the blind hole at the stage, and is not completely covered, and a certain gap is left, so that most of air in the groove or the blind hole is pumped away in the subsequent vacuumizing process, most of air is pumped away in the subsequent heating process, and secondary oxidation cannot be generated in the heating process.
Preferably, the cover plate is made of 2Cr13 stainless steel or 3Cr13 stainless steel. The thickness of the cover plate is 1 mm-2 mm. The cover plate serves as an auxiliary member and needs to be removed after the hot rolling process to expose the cutting edges. The cover plate can be removed by various methods such as punch processing, wire cutting processing, laser cutting, and the like.
In this embodiment, the hot rolling specifically includes: the heating temperature of the plate blank is controlled to be 1200-1250 ℃, the heating and heat preservation time is 6-8 h, the initial rolling temperature is 1050-1200 ℃, the first rolling deformation is controlled to be more than or equal to 20% in the rolling process, and the final rolling temperature of the plate is more than or equal to 950 ℃.
And further comprising the step of connecting the prepared composite cutter blank with a cutter handle. Or the composite cutter blank and the cutter handle are integrally formed. The kitchen knife is processed according to the size and the shape of the kitchen knife, then is subjected to heat treatment, and is ground and edged according to the traditional kitchen knife production process after the heat treatment, so that the edge of the produced kitchen knife is made of high-hardness high-wear-resistance alloy powder, and the knife body is made of low-carbon stainless steel with good corrosion resistance.
Examples
Example 1
The 10Cr15MoV alloy powder material comprises 1.2% of C, 0.5% of Si, 0.3% of Mn, 15% of Cr, 3% of Mo and 2% of V, the balance being Fe and inevitable impurities, and the oxygen content of the 10Cr15MoV alloy powder is 170ppm. The grain size of the 10Cr15MoV alloy powder is less than or equal to 200 mu m.
A method for preparing a composite cutter blank,
processing a knife body: 3Cr13 stainless steel with the width of 30mm, the height of 100mm and the length of 3m is adopted to be processed into a rectangular plate blank;
processing a cutting edge: processing a rectangular groove on one surface of a rectangular plate blank with the width of 30mm multiplied by the length of 3m, wherein the rectangular groove is 10mm wide multiplied by 25mm thick multiplied by 2.998m, filling 10Cr15MoV alloy powder into the rectangular groove, and performing tapping, wherein the tap density is 6.5g/cm 3 Covering a 3Cr13 stainless steel cover plate with the thickness of 2mm at the opening of the groove, moving the cover plate and the groove into a vacuum box together, starting a vacuum system, vacuumizing to ensure that the inside of the groove is vacuumized, keeping the vacuum degree of the inside of the groove to be 0.01Pa after vacuumizing, and hermetically connecting the cover plate and the groove by using electron beam welding to form a composite blank;
hot rolling: hot rolling the composite billet, the hot rolling comprising: the heating temperature of the plate blank is controlled at 1200 ℃, the heating and heat preservation time is 6h, the initial rolling temperature is 1050 ℃, the final rolling temperature of the plate is 1000 ℃, and the plate blank is rolled into a composite cutter material with the thickness of 3mm, the width of 100mm and the length of 30 m;
and (3) post-treatment: and removing the cover plate at the front end of the composite cutter material to expose the cutting edge to obtain a composite cutter blank.
Example 2
The 10Cr15MoV alloy powder material comprises 1% of C, 0.4% of Si, 0.4% of Mn, 14.3% of Cr, 2.8% of Mo and 2% of V, the balance being Fe and inevitable impurities, the oxygen content of the 10Cr15MoV alloy powder is 160ppm, and the particle size of the 10Cr15MoV alloy powder is less than or equal to 250 mu m.
A method for preparing a composite cutter blank,
processing a knife body: 3Cr13 stainless steel with the width of 30mm, the height of 100mm and the length of 3m is adopted to be processed into a rectangular plate blank;
processing a cutting edge: in a width of 30mm of the rectangular plate blankProcessing a rectangular groove on one surface with the length of 3m, wherein the rectangular groove is 10mm wide, 20mm thick and 2.998m long, filling 10Cr15MoV alloy powder into the rectangular groove, and compacting, wherein the compaction degree of compaction is 7g/cm 3 Covering a 3Cr13 stainless steel cover plate with the thickness of 2mm at the opening of the groove, moving the cover plate and the groove into a vacuum box together, starting a vacuum system, vacuumizing to ensure that the inside of the groove is vacuumized, keeping the vacuum degree of the inside of the groove to be 0.01Pa after vacuumizing, and hermetically connecting the cover plate and the groove by using electron beam welding to form a composite blank;
hot rolling: hot rolling the composite billet, the hot rolling comprising: the heating temperature of the plate blank is controlled to be 1180 ℃, the heating and heat preservation time is 6 hours, the initial rolling temperature is 1050 ℃, the finish rolling temperature of the plate is 980 ℃, and the plate is rolled into a composite cutter material with the thickness of 3mm, the width of 100mm and the length of 30 m;
and (3) post-treatment: and removing the cover plate at the front end of the composite cutter material to expose the cutting edge to obtain a composite cutter blank.
Example 3
The 10Cr15MoV alloy powder material comprises 1.1% of C, 0.4% of Si, 0.5% of Mn, 14.5% of Cr, 3.2% of Mo and 2% of V, the balance being Fe and inevitable impurities, the oxygen content of the 10Cr15MoV alloy powder is 155ppm, and the particle size of the 10Cr15MoV alloy powder is less than or equal to 250 mu m.
A method for preparing a composite cutter blank,
processing a knife body: 3Cr13 stainless steel with the width of 30mm, the height of 100mm and the length of 3m is adopted to be processed into a rectangular plate blank;
processing a cutting edge: processing a rectangular groove on one surface of a rectangular plate blank with the width of 30mm multiplied by the length of 3m, wherein the rectangular groove is 10mm wide multiplied by 25mm thick multiplied by 2.998m, filling 10Cr15MoV alloy powder into the rectangular groove, and performing tapping, wherein the tap compactness is 7g/cm 3 Covering a 3Cr13 stainless steel cover plate with the thickness of 1mm at the opening of the groove, moving the cover plate and the groove into a vacuum box together, starting a vacuum system, vacuumizing to ensure that the inside of the groove is vacuumized, sealing and connecting the cover plate and the groove by using electron beam welding to form a composite blank, wherein the vacuum degree of the inside of the groove is 0.01Pa after the vacuumizing;
hot rolling: hot rolling the composite billet, the hot rolling comprising: the heating temperature of the plate blank is controlled at 1200 ℃, the heating and heat preservation time is 5h, the initial rolling temperature is 1050 ℃, the final rolling temperature of the plate is 950 ℃, and the plate blank is rolled into a composite cutter material with the thickness of 3mm, the width of 100mm and the length of 30 m;
and (3) post-treatment: and removing the cover plate at the front end of the composite cutter material to expose the cutting edge to obtain a composite cutter blank.
Comparative example 1
The knife blank comprises a knife body and a knife edge, and the knife body and the knife edge are both integrally prepared from 3Cr 13.
Comparative example 2
The knife blank comprises a knife body and a knife edge, and the knife body and the knife edge are both integrally prepared from 4Cr 13.
The composite blade blank obtained in example 1 and the blades of comparative examples 1 and 2 were subjected to the tests of sharpness, sharpness durability, hardness, and bonding interface shear strength, and the test results are shown in table 1.
Table 1 test results of the blades in example 1, comparative example 1 and comparative example 2
As can be seen from Table 1, the cutting edges of the composite blade blanks obtained by the invention have better sharpness, sharpness durability and hardness than those of comparative example 1 and comparative example 2, and the bonding interface shear strength is high.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A composite knife blank comprises a knife body and is characterized in that,
the front end of the knife body is provided with a knife edge;
the knife body is made of 2Cr13 stainless steel;
the cutting edge is prepared from 10Cr15MoV alloy powder;
the blade body wraps the cutting edge on at least three sides, the cutting edge is metallurgically bonded with the blade body, and the metallurgical bonding is formed through a hot rolling process;
the 10Cr15MoV alloy powder material comprises 1.0-1.2% of C, 0.2-0.6% of Si, 0.2-0.55% of Mn, 13-15% of Cr, 2.5-4% of Mo, 1.5-2% of V, and the balance of Fe and inevitable impurities;
the oxygen content of 10Cr15MoV alloy powder adopted by the cutting edge is less than or equal to 200ppm; the cutting edge adopts 10Cr15MoV alloy powder, and the granularity is less than or equal to 250 mu m; the thickness of the blade is 20% -30% of the thickness of the blade body and is not less than 0.5mm.
2. A method of making a composite tool blank according to claim 1, comprising the steps of:
processing the cutter body: processing 2Cr13 stainless steel into a plate blank;
processing a cutting edge: forming a groove or a blind hole in the side wall of the plate blank along the horizontal direction, filling 10Cr15MoV alloy powder into the groove or the blind hole, covering a cover plate at the opening of the groove or the blind hole, vacuumizing to form vacuum inside the groove or the blind hole, and sealing and connecting the cover plate with the groove or the blind hole to form a composite blank;
hot rolling: carrying out hot rolling on the composite blank to roll the composite blank into a composite cutter material with the thickness of 2-5 mm;
and (3) post-treatment: and removing the cover plate at the front end of the composite cutter material to expose the cutting edge to obtain a composite cutter blank.
3. The method of manufacturing a composite blade blank according to claim 2,
the length of the plate blank is 3-6 m, the width is 70-120 mm, and the thickness is 30-60 mm.
4. The method of making a composite blade blank according to claim 3,
the groove is a rectangular groove, and the blind hole is a rectangular blind hole;
the length of the rectangular groove or the rectangular blind hole is 2mm less than that of the plate blank, the thickness is 10 mm-15 mm, and the depth is 10 mm-20 mm.
5. The method of making a composite blade blank according to claim 2,
in the process of machining the cutting edge, 10Cr15MoV alloy powder is filled in the groove or the blind hole, and the 10Cr15MoV alloy powder in the groove or the blind hole is compacted;
the tap density of the 10Cr15MoV alloy powder is 6.5g/cm 3 ～7.5g/cm 3 。
6. The method of manufacturing a composite blade blank according to claim 2,
in the process of processing the cutting edge, the vacuum degree in the groove or the blind hole after the vacuum pumping treatment is 0.001 Pa-0.01 Pa; and/or
In the process of machining the cutting edge, the cover plate is in sealing connection with the groove or the blind hole by adopting one of electron beam welding, laser welding or argon arc welding.
7. The method of manufacturing a composite blade blank according to claim 2,
the cover plate is made of 2Cr13 stainless steel;
the thickness of the cover plate is 1 mm-2 mm.
8. The method of manufacturing a composite blade blank according to claim 2,
the hot rolling specifically comprises: the heating temperature of the plate blank is controlled to be 1200-1250 ℃, the heating and heat preservation time is 6-8 h, the initial rolling temperature is 1050-1200 ℃, the first rolling deformation is controlled to be more than or equal to 20% in the rolling process, and the final rolling temperature of the plate is controlled to be more than or equal to 950 ℃.
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| CN201405549Y (en) * | 2009-05-12 | 2010-02-17 | 宁波工程学院 | Bimetal composite structure of powder high-speed steel and structural steel |
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Denomination of invention: Composite blade blank and its preparation method Granted publication date: 20230328 Pledgee: China Construction Bank Co.,Ltd. Loudi branch Pledgor: HUNAN 3T NEW MATERIAL Co.,Ltd. Registration number: Y2021430000063 |