CN107662084A - Cutting part and its manufacture method - Google Patents
Cutting part and its manufacture method Download PDFInfo
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- CN107662084A CN107662084A CN201610618794.7A CN201610618794A CN107662084A CN 107662084 A CN107662084 A CN 107662084A CN 201610618794 A CN201610618794 A CN 201610618794A CN 107662084 A CN107662084 A CN 107662084A
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- Prior art keywords
- cutting
- cutting part
- metal material
- manufacture method
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Classifications
-
- 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
-
- 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
- B23D65/00—Making tools for sawing machines or sawing devices for use in cutting any kind of material
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/18—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for knives, scythes, scissors, or like hand cutting tools
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/24—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for saw blades
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of manufacture method of cutting part, the cutting part has the Part I for supporting and the Part II for forming cutting edge, connects above-mentioned two-part Part III；The manufacture method includes providing the first metal material for being used for forming Part I；The second metal material for forming Part II is provided；First metal material and the second metal material are welded by high energy beam current, and weld forms Part III；It is heat-treated to obtaining cutting part blank after welding.Present invention also offers a kind of cutting part, Part I is made up of the first metal material；Part II is made up of the second metal material；After welding, Part III and neighbouring structure are substantially free of hole.The characteristics of cutting part obtained using the manufacturing process of the present invention has blade good toughness concurrently, and cutting edge hardness is high, and blade and blade are not easy to disconnect, service life length.
Description
Technical field
The present invention relates to a kind of cutting part, more particularly to a kind of cutting part formed by Metal Material Welding, its
Support section is with high tenacity and cutting edge portion is with high rigidity and high-wearing feature.The invention further relates to the system of this cutting material
Make method.
Background technology
Cutting part is used to cut object, can generally include the diversified forms such as blade and saw blade, generally comprise
Support section and cutting edge portion, support section play a part of supporting cutting edge portion, and cutting edge portion can be used for being cut.With knife
Exemplified by piece, its support section is blade, and its cutting edge portion is cutting edge.Conventional blade is typically made of single material, such as
Blanking is carried out by more integral materials and grinding forms Finished blades.Its blade of such blade and cutting edge have unified toughness
With hardness or abrasion resistance.If in order to improve the hardness of blade cutting edge, make the service life of cutting edge longer, then need to use hardness
High material.But using blade made of the high material of hardness, its degraded toughness, easily snapped off during blade use.Such as
Fruit is in order to improve the toughness of blade when using the preferable material of toughness, and thus the hardness of cutting edge made of material will be deteriorated,
So that the wearability of cutting edge reduces, service life shortens.If the making material selected is between high rigidity and high tenacity, also only
The balance between blade toughness and edge hardness can be obtained, but is both not reaching to best effect.Other cutting parts
Part there is also it is similar with blade the defects of.
Therefore, those skilled in the art is directed to developing the high tenacity for having support section concurrently and the height of cutting edge portion is hard
Degree/high-wearing feature, and the cutting part of service life length, and the manufacture method of this cutting part.
The content of the invention
In view of the drawbacks described above of prior art, the technical problems to be solved by the invention are to provide one kind and have supporting part concurrently
The high tenacity and high rigidity/high-wearing feature of cutting edge portion divided, and the cutting part and its manufacture method of service life length.
To achieve the above object, one aspect of the present invention provides a kind of manufacture method of cutting part：
The cutting part has the Part I for supporting and the Part II for forming cutting edge, connects first
Divide the Part III with Part II；
The manufacture method includes：
The first metal material is provided, it is used to form the Part I, and has first side；Second metal material is provided
Material, it is used to form the Part II, and has second side；
The first side of first metal material and the second side of the second metal material are welded by high energy beam current, weld
Form above-mentioned Part III；
Cutting part blank is obtained after welding, the cutting part blank is heat-treated.
Further, above-mentioned high energy beam current is welded as laser, electron beam or ion-beam welding.
Further, high energy beam current is welded as pulsed laser welding, and the wavelength of laser is 1064nm.
Alternatively, high energy beam current is welded as continuous laser welding, and the continuous laser is produced by rear-earth-doped laser, is swashed
The wavelength of light is 1070nm ± 10nm.
Further, the movement velocity of laser is 5~50mm/s.
Further, the first metal material is the stainless steel of hardening；Second metal material is tool steel.
Further, the first metal material is martensitic stain less steel of the carbon content between 0.1~0.7%；Second metal
Material is the alloy tool steel that high-speed tool steel of the carbon content not less than 0.7% or carbon content are not less than 0.8%.
Preferably, carbon content not less than 0.7% high-speed tool steel or carbon content not less than 0.8% alloy tool steel extremely
It is few to contain the one or more in the alloying elements such as W, Cr, Mo, V, Co.
Further, above-mentioned preparation method also comprises the following steps before welding：By the first metal material and the second metal
Material is cut, and the second metal material is 0.3mm perpendicular to the minimum widith of the first side.
Preferably, above-mentioned cutting is carried out using wire cutting or high velocity ram machine.
Preferably, above-mentioned manufacture method also comprises the following steps after being heat-treated to cutting part blank：To heat
The Part I and the Part II of cutting part blank after processing are ground, to form finished product cutting part
Shape.
The specific embodiment of the present invention additionally provides a kind of manufacture method of cutting part, and the cutting part has
The 3rd of Part II for the Part I of support and for forming cutting edge, connection Part I and Part II
Point；
The manufacture method includes：
The first metal material is provided, it is used to form Part I, and has first side；Second metal material, it is used
In formation Part II, and there is second side；First metal material be martensite of the carbon content between 0.1~0.7% not
Become rusty steel；Second metal material is the alloy tool that high-speed tool steel of the carbon content not less than 0.7% or carbon content are not less than 0.8%
Steel；
The first side of first metal material and the second side of the second metal material are welded by high energy beam current, weld
Form Part III；
Cutting part blank is obtained after welding, the cutting part blank is heat-treated, the heat treatment includes：
Make the above-mentioned temperature-gradient method of cutting part blank and insulation；
Quench the cutting part blank after heating；
Cutting part after quenching is repeatedly tempered.
Further, above-mentioned heat treatment is carried out under vacuo before quenching, and the vacuum in heating in vacuum room is little
In 200Pa.
Further, above-mentioned temperature-gradient method and incubation step include：
Cutting part blank is warming up to the first temperature with First Speed and carry out the first insulation；
Cutting part blank is warming up to second temperature from the first temperature with the second speed less than First Speed and carry out
Second of insulation；
Make cutting part blank be warming up to the 3rd temperature from second temperature with the third speed not higher than second speed to go forward side by side
Row third time is incubated.
Further, First Speed is 9.5 ± 1 DEG C/min, and the first temperature is 620~680 DEG C, and the first insulation is insulation 60
~90min；Second speed is 7 ± 0.5 DEG C/min, and second temperature is 800~850 DEG C, and the second insulation is 60~90min of insulation；
Third speed is 6 ± 0.5 DEG C/min, and the 3rd temperature is 1100~1250 DEG C, and the 3rd insulation is 60~120min of insulation.
Preferably, First Speed is 9.5 DEG C/min, and the first temperature is 650 DEG C, and the first insulation is insulation 90min；Second speed
It is 800~850 DEG C to spend for 7 DEG C/min, second temperature, and the second insulation is 60~90min of insulation；Third speed is 6 DEG C/min, the
Three temperature are 1100~1250 DEG C, and the 3rd insulation is 60~120min of insulation.
Further, quench as vacuum air-quenching, inert gas pressure is at least 0.5bar in heating chamber, makes in heating chamber
Temperature drops to less than 100 DEG C.
Alternatively, quench as vacuum oil quenching, the vacuum quenching oil temperature range used is between 50~80 DEG C.
Further, the second metal material is not less than 0.7% high-speed tool steel using carbon content, and tempering step includes：
The cutting part blank after quenching is warming up to the 4th temperature and carries out the 4th insulation.
Preferably, the 4th temperature is 500~560 DEG C, and the 4th insulation is insulation 2 hours, and tempering is carried out 3 times, every time tempering
Preceding cutting part blank sky is cooled to after room temperature is warming up to the 4th temperature again.
Alternatively, the second metal material is not less than 0.8% alloy tool steel using carbon content, and tempering step includes：
Cutting part blank after quenching is warming up to the 5th temperature and carries out the 5th insulation.
Still optionally further, the 5th temperature is 180~260 DEG C, and the 5th insulation is insulation 2 hours, is tempered progress 2 times, often
Cutting part blank sky is cooled to after room temperature before secondary tempering and is warming up to the 5th temperature again.
Another aspect of the present invention also provides a kind of cutting part, the cutting part have for support Part I and
For forming the Part II of cutting edge, the Part III of Part I and Part II is connected；
Part I is made up of the first metal material, and the first metal material is the stainless steel of hardening, and has first side；
Part II is made up of the second metal material, and the second metal material is tool steel, and has second side；
Part III passes through high energy beam current by the first side of the first metal material and the second side of the second metal material
Formed during welding；
After welding, Part I is in structure, the structure and second of Part III at Part III
Part is all substantially free of hole in the structure at Part III.
Further, Part I contains martensite, ferrite and carbide group in the structure at Part III
Knit, Part II contains cryptocrystalline martensite and partially carbonized thing tissue in the structure at Part III.
Further, Part I causes tensile strength at this not less than the in the structure at the Part III
The tensile strength of one metal material；Part II make it that the tensile strength at this is not low in the structure at Part III
In the tensile strength of the second metal material.
Further, the cutting part lifts hardness through Overheating Treatment, and the hardness of the Part I after Overheating Treatment exists
Between 36-54HRC, the hardness of Part II is between 58-72RHC.
Further, Part II has the first edge for cutting, and first edge is smooth or zigzag.
Further, cutting part has the shape of polygon.
Further, cutting part is the shape of triangle, has the second side intersected respectively with the both ends of first edge
Edge and the 3rd edge, second edge and the 3rd edge also intersect；Part I and Part II extend to described from second edge
3rd edge.
Further, second edge is made up of at least two lines section, wherein at least including one section of full curve.
Further, above-mentioned at least two lines section mathematically can continuously be led.
Preferably, the ratio of the Breadth Maximum of the Breadth Maximum of Part II and Part I is 1:15~1:3.
It is yet another aspect of the present invention to provide a kind of cutting tool, and it includes the cutting part that method manufacture is manufactured as described above
Part, or including cutting part as described above.
Further, above-mentioned cutting tool is fruit knife, kitchen knife, replaceable blade utility knife, jackknife, cutter, singly operated on, palm
Saw, wallboard saw or sweep-saw etc..
The cutting part of the present invention has support section (Part I) good toughness concurrently, and cutting edge portion (Part II) hardness is high
The characteristics of.Using the two kinds of metal materials and welding method in the present invention, the Part III of acquisition is the metallographic group of commissure
Knit does not have hole substantially, and this, which shows to be welded to connect, works well, and commissure intensity is higher, it is not easy to fractures.Weld seam both sides
Support section and the structure of cutting edge portion there is no hole substantially yet, and support section is after welding close to commissure
Structure contains martensite, ferrite and carbide tissue, and the structure improves the tensile strength of the part, is allowed at least not low
In the tensile strength of the first metal material script used in support section.Cutting edge portion is after welding close to the metallographic of commissure
Structure improves the tensile strength of the part containing cryptocrystalline martensite and partially carbonized thing tissue, the structure, is allowed at least be not less than
The tensile strength of second metal material script used in cutting edge portion.
Therefore, weld seam caused by the metal material and welding procedure that the present invention uses and the structure near weld seam, overcome
Conventional metal material produces the flimsy nature of weld seam when using conventional soldering techniques parameter so that whole cutting edge portion and support
Partial connection is good, and the connection is no longer the vulnerable area of whole cutting part, so that the cutting part has more
Good service life.
Temperature-rise period during heat treatment, using heating stage by stage and heat preserving mode, programming rate is slower when temperature is higher,
With reference to the present invention specific process parameter, can effectively prevent cutting part handle herein during cracking.
The construction and cutting edge curve (i.e. first edge) of triangle in the specific embodiment of the present invention exist
The continuous property led mathematically so that the cutting effect of the cutting part is more preferable.
It is hard by the metal material composition and process, the final finished of the cutting part of acquisition, its blade of the present invention
Degree in 36-54HRC, cutting edge hardness in 58-72RHC, have concurrently support section high tenacity and cutting edge portion high rigidity/height it is resistance to
Mill property, its durability degree substantially increase the service life of cutting part in more than 300mm.
Design, concrete structure and the caused technique effect of the present invention are described further below with reference to accompanying drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is the schematic diagram of a preferred embodiment of the cutting part of the present invention, and it is specially blade.
Fig. 2 is the metallographic structure near the Part III of a preferred embodiment of the cutting part of the present invention.
Fig. 3 and Fig. 4 is the schematic diagram of one embodiment of cutting part of the present invention, and it is specially replaceable blade utility knife blade.
Fig. 5 is the schematic diagram of another embodiment of the cutting part of the present invention, and it is specially razor blade for carving tool.
Fig. 6 and Fig. 7 is the schematic diagram of the another embodiment of the cutting part of the present invention, and it is specially chopper.
Fig. 8 and Fig. 9 is the schematic diagram of the another embodiment of the cutting part of the present invention, and it is specially panel saw and wallboard saw
Saw blade.
Embodiment
Signified cutting part of the invention, for being cut to object, including support section, cutting edge portion and weld seam,
Support section plays a part of supporting cutting edge portion, and cutting edge portion can be used for being cut, and weld seam is formed to even by welding
Connect support section and cutting edge portion.
Fig. 1 shows the cutting part of one embodiment of the present of invention, is a kind of blade.The blade defines first edge
1st, the edge 3 of second edge 2 and the 3rd, wherein, first edge 1 and second edge 2 have the first intersection point 11, first edge 1 and
Three edges 3 have the second intersection point 12, and the edge 3 of second edge 2 and the 3rd has the 3rd intersection point 13.In the embodiment, knife
A kind of construction of triangle is presented in piece.
The blade has the Part I 4 for supporting, and for forming the Part II 5 of cutting edge.Part I 4
Extend along second edge 2 towards the 3rd edge 3, Part II 5 is between first edge 1 and Part I 4 towards the 3rd side
Edge 3 extends.There is the Part III 6 that welding is formed between Part I 4 and Part II 5, i.e. weld seam, Part III 6 connects
Part I 4 and Part II 5.
Part I 4 is made up of the first metal material, and the first metal material has higher toughness, stainless from martensite
Steel.In a preferred embodiment, the carbon content of the martensitic stain less steel can be selected from following between 0.1~0.7%
The martensitic stain less steel of the standardization of the trade mark (the Chinese trade mark/U.S.'s trade mark), including but not limited to 2Cr13/420,3Cr13/
420th, 4Cr13 and 7Cr17/440 etc..
Part II 5 is made up of the second metal material, and the second metal material has higher hardness/wearability, from height
Fast tool steel or alloy tool steel.In a preferred embodiment, the carbon content of the high-speed tool steel be not less than 0.7%, and
And at least containing the one or more in the alloying elements such as W, Cr, Mo, V and Co, can be selected from the following trade mark (the Chinese trade mark/
U.S.'s trade mark) standardization high-speed tool steel, including but not limited to W18Cr4V/T1, W18Cr4V2Co8/T5,
W12Cr4V5Co5/T15, W6Mo5Cr4V2/M2, W2Mo9Cr4V2/M7 and W2Mo9Cr4VCo8/M42.It is preferable at another
In embodiment, the carbon content of the alloy tool steel is not less than 0.8%, can be selected from the following trade mark (the Chinese trade mark/American card
Number) standardization alloy tool steel, including but not limited to Cr12Mo1V1/D2, Cr12/D3 and Cr5Mo1V/A2.
When the first metal material and the second metal material are welded to connect, the Part III 6 of blade is formed.3rd
Part 6 is the weld seam between Part I and Part II.The structure of the weld seam is observed, as shown in a in Fig. 2,
The basic formation without hole, this shows that the welding effect of weld seam is good.At the Part I 4 close to Part III 6, such as Fig. 2
In b shown in, its structure contains martensite, ferrite and carbide tissue after welding.At second of close Part III 6
Divide at 5, as shown in the c in Fig. 2, its structure contains cryptocrystalline martensite and partially carbonized thing tissue after welding.Above-mentioned metallographic group
Knit and ensure that the Part I 4 of close Part III 6 is suitable at least with mother metal with the tensile strength of Part II 5.Part III
6th, Part I 4 is at close Part III 6 and Part II 5 is substantially all not in the structure at Part III 6
Hole, this shows that the structural strength of weld is higher, it is not easy to is broken, thus it is not easy to Part I and second occur
Divide situation about disconnecting in use, extend the service life of blade.
In a preferred embodiment, the number ratios of the width of Part II 5 and the Breadth Maximum of Part I 4 exist
1:15~1:Between 3, for example it is 1:15、1:10、1:5 or 1:3.Ratio setting in this range, that is, it ensure that Part II 4
It can be welded on Part I 5, in turn ensure that Part II 4 is unlikely to too wide, weakens the toughness of Part I 5, so as to
Whole blade is caused to easily snap off.It ensure that the hardness and wearability of the cutting edge that Part II is formed, also ensure that first
Partial higher toughness.
In yet another embodiment, the first edge 1 of blade is made up of at least two lines section, continuous bent including one section
Line.The curve that all composition line segments are formed mathematically can continuously be led.Such cutting edge curve form coordinates triangle
Blade structure, good cutting effect can be produced.
Skilled person will appreciate that cutting part of the invention can also have various shapes and construction, for example, such as Fig. 3
With the replaceable blade utility knife blade shown in Fig. 4, it has trapezoidal outward appearance, including the Part I 21,31 for support, is cut for being formed
The Part II 22 of sword, the Part III 23,33 formed between 32, and Part I and Part II by welding are cut, its
There is the groove or hole for being used for coordinating with the other parts of replaceable blade utility knife on middle Part I 21 or 31.Cutting part can also be such as
It is a kind of razor blade for carving tool shown in Fig. 5, it has the shape of parallelogram, including the Part I 41 for support, is used for
The Part II 42 of cutting edge is formed, and by welding the Part III 43 formed between Part I and Part II.Cut
It can also be as shown in Figures 6 and 7 chopper to cut part, have the prominent handle connecting portion of extension on its Part I 51 or 61
Divide 511 and 611, the handle con-nection part can be identical with the material of Part I, can also be different.Cutting part can also be such as
It is the saw blade of panel saw or wallboard saw shown in Fig. 8 and 9, it forms the Part II of cutting edge by modes such as grindings, produces saw
The edge of dentation.The zigzag can be the zigzag fashion commonly used in the art such as dual roll flute or triple roll flutes.These are different
In embodiment, i.e., Part III and its neighbouring structure are equal after the material of Part I, the i.e. material of Part II, welding
As in the foregoing embodiment, will not be repeated here.
Skilled person will appreciate that cutting part of the invention can also have it is other more in addition to foregoing description
Kind shape and construction.
Another aspect of the present invention provides the manufacture method of cutting part as described above, in an embodiment
In, the manufacture method comprises the following steps：1) to the first metal material and the second metal material blanking, 2) utilize high energy beam fluid welding
Connect, such as laser, electron beam or ion-beam welding, 3) the cutting part blank after welding is heat-treated, 4) to heat treatment after
Cutting part be ground to form final products.
The present invention manufacture method one embodiment in, the first metal material using carbon content 0.1~0.7% it
Between martensitic stain less steel, the second metal material from carbon content be not less than 0.7% high-speed tool steel.
First, the first metal material and the second metal material are distinguished into blanking, cuts into and correspond roughly to finished product cutting part
The Part I of part and the shape of Part II.The cutting can use wire cutting or high velocity ram machine to carry out, and can also use this
Other conventional use of cutting modes are carried out in field.The first metal material after cutting has relatively flat first side,
The second metal material after cutting has relatively flat second side.
Then, using wavelength 1064nm, translational speed 5~50mm/s pulse laser, to the first metal after cutting
The first side of material and the second side of the second metal material welded.In another embodiment of the present invention,
Can also be welded using the continuous laser of wavelength 1070nm ± 10nm, translational speed in 5~50mm/s, the continuous laser by
Rear-earth-doped laser produces.Furthermore it is also possible to welded using electron beam, ion beam.
Afterwards, the cutting part blank after welding is heat-treated.The heat treatment includes 1) heating up and being incubated；2) quench
Fire；3) it is tempered.Wherein, heat up and be incubated and quenching is carried out in a vacuum furnace, before quenching, the vacuum in heating in vacuum room
No more than 200Pa.
Heat treatment is specially：
1) heat up and be incubated：620~680 DEG C are warming up to 9.5 ± 1 DEG C/min speed, is incubated 60~90min；Again with 7
± 0.5 DEG C/min speed is warming up to 800~850 DEG C, is incubated 60~90min；It is warming up to again with 6 ± 0.5 DEG C/min speed
1100~1250 DEG C, it is incubated 60~120min.In a preferred embodiment, 650 are warming up to 9.5 DEG C/min speed
DEG C, it is incubated 90min；800~850 DEG C are warming up to 7 DEG C/min speed again, is incubated 60~90min；Again with 6 DEG C/min speed
Degree is warming up to 1100~1250 DEG C, is incubated 60~120min；
2) quench：Using vacuum air-quenching, inert gas is filled with heating chamber, makes inert gas pressure in heating chamber extremely
It is less 0.5bar, is cooled to less than 100 DEG C (referring to vacuum drying oven displays temperature as less than 100 DEG C).In another embodiment, quenching is adopted
With vacuum oil quenching, the vacuum quenching oil temperature range used is between 50~80 DEG C.
3) it is tempered：Then the cutting part blank air cooling after quenching to room temperature is warming up between 500~560 DEG C, be incubated
2 hours, then the step is repeated twice, i.e. tempering is carried out altogether three times.
Finally, the grinding of size and dimension is carried out to the cutting part blank after heat treatment.Grinding can use this area
Conventional use of method is carried out, for example is carried out using grinding machine.
In another embodiment of manufacture method of the present invention, the first metal material using carbon content 0.1~0.7% it
Between martensitic stain less steel, the second metal material from carbon content be not less than 0.8% alloy tool steel.
Wherein, the heating in blanking, welding, heat treatment and quenching Step and last grinding step are such as manufacture method
Previous embodiment described in, no longer repeated herein.
Tempering step in heat treatment process is specially：By the cutting part blank air cooling after quenching to room temperature, Ran Housheng
Between warm to 180~260 DEG C, 2 hours are incubated, then the step is repeated once, be i.e. tempering is carried out altogether twice.
In addition, in the further embodiment of manufacture method, to the heat treatment process of the cutting part blank after welding
It can not carry out under vacuo.
By above-mentioned embodiment or the manufacture method of embodiment, Part III is obtained after welding, its metallographic knot
Hole (as shown in Fig. 2 a) is substantially not present in structure, this shows the welding manner in embodiment, is welded to connect effect
It is good, weld and frangibility is not allowed at the Part III of formation.Part I can be formed containing geneva after welding at Part III
The structure of body, ferrite and carbide tissue, the structure improve the tensile strength of the part, are allowed at least not less than the
The tensile strength of first metal material script used in a part.Part II can be formed after welding at Part III
Income structure containing cryptocrystalline martensite and partially carbonized thing tissue, the structure improve the tensile strength of the part, are allowed at least
Not less than the tensile strength of the second metal material script used in Part II.
After the heat treatment, for the hardness of Part I in 36-54HRC, it is preferable that such hardness imparts Part I
Toughness so that cutting part does not allow frangibility.The hardness of Part II is good which imparts Part II in 58-72RHC
Wearability so that the service life of cutting edge is longer.
Another aspect of the invention provides a kind of cutting tool, and it includes cutting part described above.The cutter
Tool can be fruit knife, replaceable blade utility knife, jackknife, cutter, singly operate on, panel saw, wallboard saw or sweep-saw etc..
Using the present invention method manufacture blade formed singly operate on, with it is existing singly operate on compared with, its sharpness and
Durability degree is as follows：
As can be seen here, there is its durability degree of the cutting part of the embodiment of the present invention to be improved relative to existing blade of singly operating on
More times.
Preferred embodiment of the invention described in detail above.It should be appreciated that the ordinary skill of this area is without wound
The property made work can makes many modifications and variations according to the design of the present invention.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be in the protection domain being defined in the patent claims.
Claims (32)
- A kind of 1. manufacture method of cutting part, it is characterised in that：The cutting part has the Part I for supporting and the Part II for forming cutting edge, connection described first Part and the Part III of the Part II；The manufacture method includes：The first metal material is provided, it is used to form the Part I, and has first side；Second metal material is provided, It is used to form the Part II, and has second side；The first side of first metal material and the second side of second metal material are welded by high energy beam current, weldering The place of connecing forms the Part III；Cutting part blank is obtained after welding, the cutting part blank is heat-treated.
- 2. the manufacture method of cutting part as claimed in claim 1, it is characterised in that the high energy beam current be welded as laser, Electron beam or ion-beam welding.
- 3. the manufacture method of cutting part as claimed in claim 2, it is characterised in that the high energy beam current is welded as pulse and swashed Photocoagulation, the wavelength of laser is 1064nm.
- 4. the manufacture method of cutting part as claimed in claim 2, it is characterised in that the high energy beam current is welded as continuous sharp Photocoagulation, the continuous laser are produced by rear-earth-doped laser, and the wavelength of laser is 1070nm ± 10nm.
- 5. the manufacture method of the cutting part as described in claim 3 or 4, it is characterised in that the movement velocity of laser be 5~ 50mm/s。
- 6. the manufacture method of cutting part as claimed in claim 2, it is characterised in that first metal material is hardening Stainless steel；Second metal material is tool steel.
- 7. the manufacture method of cutting part as claimed in claim 6, it is characterised in that first metal material is carbon content Martensitic stain less steel between 0.1~0.7%；Second metal material is the high-speed tool that carbon content is not less than 0.7% Steel or carbon content are not less than 0.8% alloy tool steel.
- 8. the manufacture method of cutting part as claimed in claim 7, it is characterised in that the carbon content is not less than 0.7% The alloy tool steel of high-speed tool steel or carbon content not less than 0.8% is at least containing one in the alloying elements such as W, Cr, Mo, V, Co Kind is a variety of.
- 9. the manufacture method of cutting part as claimed in claim 6, it is characterised in that the manufacture method is before the welding Also comprise the following steps：First metal material and second metal material are cut, second metal material Minimum widith perpendicular to the first side is 0.3mm.
- A kind of 10. manufacture method of cutting part, it is characterised in thatThe cutting part has the Part I for supporting and the Part II for forming cutting edge, connection described first Part and the Part III of the Part II；The manufacture method includes：The first metal material is provided, it is used to form the Part I, and has first side；Second metal material is provided, It is used to form the Part II, and has second side；First metal material be carbon content 0.1~0.7% it Between martensitic stain less steel；Second metal material is that high-speed tool steel of the carbon content not less than 0.7% or carbon content be not low In 0.8% alloy tool steel；The first side of first metal material and the second side of second metal material are welded by high energy beam current, weldering The place of connecing forms the Part III；Cutting part blank is obtained after welding, the cutting part blank is heat-treated, the heat treatment includes：Make the temperature-gradient method of cutting part blank and insulation；Quench the cutting part blank after heating；The cutting part after quenching is repeatedly tempered.
- 11. the manufacture method of cutting part as claimed in claim 10, it is characterised in that the heat treatment is in the quenching Preceding to carry out under vacuo, the vacuum in heating in vacuum room is not more than 200Pa.
- 12. the manufacture method of cutting part as claimed in claim 11, it is characterised in that the temperature-gradient method and incubation step Including：The cutting part blank is warming up to the first temperature with First Speed and carry out the first insulation；The cutting part blank is set to be warming up to the second temperature from first temperature with the second speed less than the First Speed Spend and carry out second of insulation；The cutting part blank is set to be warming up to the 3rd from the second temperature with the third speed not higher than the second speed Temperature simultaneously carries out third time insulation.
- 13. the manufacture method of cutting part as claimed in claim 12, it is characterised in that the First Speed is 9.5 ± 1 DEG C/min, first temperature is 620~680 DEG C, and first insulation is 60~90min of insulation；The second speed be 7 ± 0.5 DEG C/min, the second temperature is 800~850 DEG C, and second insulation is 60~90min of insulation；The third speed is 6 ± 0.5 DEG C/min, the 3rd temperature is 1100~1250 DEG C, and the 3rd insulation is 60~120min of insulation.
- 14. the manufacture method of cutting part as claimed in claim 13, it is characterised in that the First Speed be 9.5 DEG C/ Min, first temperature are 650 DEG C, and first insulation is insulation 90min；The second speed is 7 DEG C/min, described Two temperature are 800~850 DEG C, and second insulation is 60~90min of insulation；The third speed is 6 DEG C/min, the described 3rd Temperature is 1100~1250 DEG C, and the 3rd insulation is 60~120min of insulation.
- 15. the manufacture method of cutting part as claimed in claim 10, it is characterised in that the quenching is vacuum air-quenching, is added The pressure of inert gas is at least 0.5bar in hot cell, the temperature in heating chamber is dropped to less than 100 DEG C.
- 16. the manufacture method of cutting part as claimed in claim 10, it is characterised in that the quenching is vacuum oil quenching, is made Vacuum quenching oil temperature range is between 50~80 DEG C.
- 17. the manufacture method of cutting part as claimed in claim 10, it is characterised in that second metal material uses carbon Content is not less than 0.7% high-speed tool steel, and the tempering step includes：The cutting part blank after quenching is warming up to the 4th temperature and carries out the 4th insulation.
- 18. the manufacture method of cutting part as claimed in claim 17, it is characterised in that the 4th temperature is 500~560 DEG C, the 4th insulation is insulation 2 hours, and the tempering is carried out 3 times, before being tempered every time by the cutting part blank air cooling but The 4th temperature is warming up to after to room temperature again.
- 19. the manufacture method of cutting part as claimed in claim 10, it is characterised in that second metal material uses carbon Content is not less than 0.8% alloy tool steel, and the tempering step includes：The cutting part blank after quenching is warming up to the 5th temperature and carries out the 5th insulation.
- 20. the manufacture method of cutting part as claimed in claim 19, it is characterised in that the 5th temperature is 180~260 DEG C, the 5th insulation is insulation 2 hours, and the tempering is carried out 2 times, before being tempered every time by the cutting part blank air cooling but The 5th temperature is warming up to after to room temperature again.
- A kind of 21. cutting part, it is characterised in that：The cutting part has the Part I for supporting and the Part II for forming cutting edge, connection described first Part and the Part III of the Part II；The Part I is made up of the first metal material, and first metal material is the stainless steel of hardening, and with first Side；The Part II is made up of the second metal material, and second metal material is tool steel, and has second side；The Part III is passed through by the first side of first metal material and the second side of second metal material High energy beam current is formed when welding；After welding, the Part I is in structure, the metallographic knot of the Part III at the Part III Structure and the Part II are all substantially free of hole in the structure at the Part III.
- 22. cutting part as claimed in claim 21, it is characterised in that after welding, the Part I is close to described Structure at Part III contains martensite, ferrite and carbide tissue, and the Part II is close to described 3rd The structure of office contains cryptocrystalline martensite and partially carbonized thing tissue.
- 23. cutting part as claimed in claim 22, it is characterised in that the Part I is at the Part III Structure cause tensile strength at this to be not less than the tensile strength of first metal material；The Part II by Structure at the nearly Part III causes the tensile strength at this to be not less than the tensile strength of second metal material.
- 24. cutting part as claimed in claim 23, it is characterised in that the cutting part lifts hardness through Overheating Treatment, The hardness of the Part I after Overheating Treatment between 36-54HRC, the hardness of the Part II 58-72RHC it Between.
- 25. cutting part as claimed in claim 24, it is characterised in that the Part II has the first side for cutting Edge, the first edge are smooth or zigzag.
- 26. cutting part as claimed in claim 25, it is characterised in that the cutting part has the shape of polygon.
- 27. cutting part as claimed in claim 26, it is characterised in that the cutting part is the shape of triangle, is had The second edge intersected respectively with the both ends of the first edge and the 3rd edge, the second edge and the 3rd edge It is intersecting；The Part I and the Part II extend to the 3rd edge from the second edge.
- 28. cutting part as claimed in claim 27, it is characterised in that the second edge is made up of at least two lines section, Wherein at least include one section of full curve.
- 29. cutting part as claimed in claim 28, it is characterised in that at least two lines section is mathematically can continuously to lead 's.
- 30. cutting part as claimed in claim 27, it is characterised in that the Breadth Maximum of the Part II and described first The ratio of partial Breadth Maximum is 1:15~1:3.
- 31. a kind of cutting tool, it is characterised in that the cutting tool includes the cutting as described in claim 1-4 and 6-20 The cutting part of the manufacture method manufacture of part, or including the cutting part as described in claim 21-30.
- 32. cutting tool as claimed in claim 31, it is characterised in that the cutting tool is fruit knife, kitchen knife, practicality Knife, jackknife, cutter, singly operate on, panel saw, wallboard saw or sweep-saw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610618794.7A CN107662084A (en) | 2016-07-28 | 2016-07-28 | Cutting part and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610618794.7A CN107662084A (en) | 2016-07-28 | 2016-07-28 | Cutting part and its manufacture method |
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| CN107662084A true CN107662084A (en) | 2018-02-06 |
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| CN201610618794.7A Pending CN107662084A (en) | 2016-07-28 | 2016-07-28 | Cutting part and its manufacture method |
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| US4336083A (en) * | 1980-04-24 | 1982-06-22 | Asko, Inc. | Method of producing knife for cutting hot metal |
| DE20221211U1 (en) * | 2001-07-26 | 2005-07-07 | American Saw & Mfg. Co., East Longmeadow | Composite utility knife blade has weld region joins the first and second metal portions, and extending from approximately one side edge to other side edge of the blade |
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