CN108130478A - A kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb - Google Patents
A kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb Download PDFInfo
- Publication number
- CN108130478A CN108130478A CN201711399631.5A CN201711399631A CN108130478A CN 108130478 A CN108130478 A CN 108130478A CN 201711399631 A CN201711399631 A CN 201711399631A CN 108130478 A CN108130478 A CN 108130478A
- Authority
- CN
- China
- Prior art keywords
- steel
- mechanical bit
- shear
- high alloy
- alloy tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
- B27C1/14—Other details or accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C5/00—Machines designed for producing special profiles or shaped work, e.g. by rotary cutters; Equipment therefor
-
- 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
- C21D9/22—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
- 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
-
- 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
-
- 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
-
- 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- 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
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of Cr W Mo V high alloy tool steels containing micro Nb to inlay steel mechanical bit, belongs to the preparation field of mechanical bit.The present invention its ingredient of shear-steel and weight percent be：C 0.54~0.64%, Si0.4~0.6%, Mn0.25~0.5%, Cr 6.0~6.8%, W 2.0~2.5%, Mo 1.4~1.8%, V0.3~0.4%, Co 0.18~0.3%, Nb 0.15~0.2%, S≤0.02%, P≤0.025%, Fe surpluses.Using electroslag remelting ingot casting after electric induction furnace or electric induction furnace and subsequent 870 DEG C~1100 DEG C forging rollings and 840 DEG C of processing steps annealed.Soldering Quench heating is carried out using 1050 DEG C~1060 DEG C, ingredient shear-steel mounting is made to carry out temper three times after quenched processing on the cutter hub of mild steel.The mechanical bit comprehensive performance of the present invention higher than widely used 5Cr types shear-steel edge steel mechanical bit at present, than hot rolling edge steel production mechanical bit it is simple for process, production cost reduces 25%.
Description
Technical field
The present invention relates to the preparing technical field of mechanical bit, more specifically to a kind of Cr-W- containing micro Nb
Mo-V high alloy tool steels inlay steel mechanical bit.
Background technology
At present, the extensive 5Cr8 types high alloy tool steel of timber processed and applied makees the edge steel blade of shear-steel, is applied to plane more
Cutter is also used for peeling knife.But it is not adequate to process very hard abrasion of wood for slicing knife；It is near for peeling knife
In order to be suitable for processing compared with hardwood, with the former low middle alloy tool steel peeling knife of replacement over a little years, but easily generation in use
Small burr shape cutting edge.Therefore, it is badly in need of developing the edge steel mechanical bit that a kind of high alloy tool steel makees shear-steel, performance is better than
5Cr8 types inlay steel mechanical bit, not only can further improve wearability as slicing knife, but also can avoid generating burr shape as peeling knife
Cutting edge is also adapted to the technological requirement of 1050 DEG C~1060 DEG C of copper-based filler metal soldering while quenching.The purpose is into one
Step improves the performance of timber processing slicing knife and peeling knife to cope with higher and higher processing request and domestic and international market
Keen competition.
The scientific research in China mechanical bit field and product quality have been in the international rank of advanced units, mechanical bit Product Marketing
The ratio of international market alreadys exceed external well-established business.The fine copper soldering or copper-based conjunction of applicant edge steel mechanical bit
The technique of gold brazing filler metal soldering while quenching is advanced, fine craftsmanship, compared with the hot rolling edge steel technique that most enterprises use, technique
The technical process such as annealing, individually quenching and multi-pass smoothing alignment are not only omitted, but also overcome hot rolling edge steel weld strength
Fluctuate it is larger and high-temperature heating usually scaling loss the drawbacks of, have unique technology advantage.Therefore the present invention first has to provide
The reasonable hardening heat of high alloy tool steel shear-steel material must coincide with copper-based filler metal brazing temperature, i.e., 1050 DEG C~
At once air-blast quenching after 1060 DEG C of heating solderings edge steel.
The ingredient of 5Cr8 type high alloy tool steels is (wt%) C 0.45-0.55, Si 0.8-1.2, Mn 0.25-0.5, Cr
8.0-9.0, W 1.0-1.5, Mo 1.5-2.0, V 0.2-0.4, S, P≤0.03, surplus Fe；It can be write by grade of steel name
5Cr8WMo2VSi does not contain W sometimes by purposes yet, is referred to as 5Cr8 type alloy tool steels.Ingredient is equal according to alloy system according to this
The thermodynamics method that weighs calculates, and carbide has been completely dissolved (referring to attached drawing 1-1) in steel when being heated to 1050 DEG C~1060 DEG C, even if
The soldering Quench heating time does not reach the equilibrium state being completely dissolved, it is remaining also know clearly it is very few.In this case, it on the one hand quenches
Fiery crystal grain, which can significantly grow up, reduces toughness；On the other hand lacking a certain number of remaining carbide of tiny quenching makes point of a knife necessarily produce
Raw micro-crack is extended along cleavage surface, tiny chipping is easily occurred and is formed point of a knife burr；In addition, it is also dropped because remaining carbide content is very few
Low wearability.Without big change (refer to the attached drawing 1-2) even if add in a small amount of Nb on the basis of 5Cr8 shaped steel.Shen of the present invention
Ask someone once there is a patent to provide a kind of semi-high speed steel edge steel mechanical bit (patent No. suitable for fine copper soldering quenching
CN201210289224X).It also has excellent performance, but be then broken for peeling knife for timber processing slicing knife
Toughness is insufficient.Because timber rotation has vibrations when rotary-cut is processed, point of a knife is simultaneously by longitudinal force and cross force, to fracture toughness requirement
It is very high, and timber plain quickly moves when slicing is processed, the main transverse vibration very little by longitudinal force.
From the foregoing, it can be seen that it needs to develop a kind of high alloy tool steel for being brazed quenching technical simultaneously suitable for copper-based filler metal
Make the novel edge steel mechanical bit of shear-steel, can not only make timber processing slicing knife but also peeling knife can be made.Edge steel weld strength should be higher than that
To prevent alternation Lateral Force from generating creep running crack, shear-steel performance should be better than current widely used 5Cr8 for fine copper soldering
Type tool steel inlays steel mechanical bit.It is allowed to significantly improve for the wearability of slicing knife, is avoided that burr occur for peeling knife
Shape cutting edge.
Invention content
1. technical problems to be solved by the inivention
It is an object of the invention to overcome in the prior art mechanical bit wear no resistance, be also easy to produce burr shape cutting edge deficiency,
Provide a kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb, the high alloy of trace niobium-containing of the present invention
Tool steel edge steel mechanical bit shear-steel microscopic structure evenly refines, and sharpness, wearability and impact resistance are above original
5Cr8 types shear-steel inlays steel mechanical bit, and the slicing knife for being not only suitable for timber processing is also applied for peeling knife etc..
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
The present invention has developed a kind of Cr-W-Mo-V high containing micro Nb suitable for copper-based filler metal soldering quenching technical and closes
Golden tool steel makees the edge steel mechanical bit of shear-steel, which can not only do timber processing slicing knife but also can make peeling knife, property
It can make the edge steel mechanical bit of shear-steel better than current widely used 5Cr8 types tool steel.Cr-W-Mo-V high containing micro Nb is closed
Golden tool steel shear-steel ingredient is (wt%)：C 0.54~0.64%, Si0.4~0.6%, Mn0.25~0.5%, Cr 6.0~
6.8%, W 2.0~2.5%, Mo 1.4~1.8%, V0.3~0.4%, Co0.18~0.3%, Nb 0.15~0.2%, S≤
0.02%, P≤0.025%, Fe surplus.
The manufacturing process of the high alloy tool steel edge steel mechanical bit of trace niobium-containing includes：(1) using electric induction furnace or sense
Electroslag remelting ingot casting after electric furnace is answered, then carries out the processing steps for being included in 870 DEG C~1100 DEG C forging rollings and 840 DEG C of annealing.(2)
Carry out soldering Quench heating using 1050 DEG C~1060 DEG C, the ingredient shear-steel made to be welded on the cutter hub of mild steel, and simultaneously into
The processing of sector-style cold quenching.(3) temper is carried out according to mechanical bit application type, temperature is 530 DEG C -550 DEG C.Into one
Step ground can make slicing knife in 530 DEG C of -540 DEG C of tempering, and 540 DEG C of -550 DEG C of tempering make peeling knife.(4) it is dug slightly, slightly
The processing step of the mechanical processings such as head, fine grinding and pass is ground, cut, is manufactured as edge steel mechanical bit.
The edge steel mechanical bit shear-steel welding performance of the Cr-W-Mo-V high alloy tool steels containing micro Nb and sword of the present invention
Structure of steel and Properties Control index：Soldered seam shear strength >=250MPa, shear-steel microscopic structure is tempered martensite, carbide
Add retained austenite, remaining 0.25 μm of carbide size average out to, full-size≤0.9 μm, remained austenite content≤5.5%.
The high alloy tool steel edge steel mechanical bit shear-steel microscopic structure of trace niobium-containing of the present invention evenly refines, sharpness, wear-resisting
Property and impact resistance be above former 5Cr8 types shear-steel edge steel mechanical bit, the slicing knife for being not only suitable for timber processing is also applied for revolving
Cutter.
3. advantageous effect
Using technical solution provided by the invention, compared with prior art, have the advantages that：
(1) it is of the invention to have developed a kind of new shear-steel material and with new copper-based filler metal soldering quenching technical production
Edge steel mechanical bit.Its comprehensive performance is higher than widely used 5Cr types shear-steel edge steel mechanical bit at present, than hot rolling edge steel life
The mechanical bit of production it is simple for process, production cost reduces 25%.(2) present invention processes slicing knife service life for timber
33% is improved, and can the normal hardwood material such as slicing beech, toothed oak wood；Cutting edge sharpness for timber processing peeling knife is high, anti-impact
Toughness height is hit, cutting edge is avoided and burr and chipping phenomenon occurs.(3) superior performance of mechanical bit of the invention, versatile,
It is with a wide range of applications, is conducive to improve the competitiveness of domestic and international market.
Description of the drawings
Fig. 1 is：(Fig. 1-1 5Cr8 shaped steel, Fig. 1-2 5Cr8 types add Nb to the 5Cr8 shaped steel and new material shear-steel phasor of calculating
Steel, Fig. 1-3 new material steel, Fig. 1-4 new material steel are not added with Nb)
Fig. 2~4 are：Microscopic structure stereoscan photograph (Fig. 2 of new material shear-steel：840 DEG C of annealing, Fig. 3：1050 DEG C are quenched
Fire, Fig. 4：540 DEG C of tempering)
Fig. 5 is：New material shear-steel inlays steel mechanical bit structure diagram.
Label declaration in schematic diagram：1st, cutter hub；2nd, shear-steel.
Specific embodiment
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
(1) with alloy system balance each other thermodynamics method carry out largely calculate research, obtain a kind of containing micro Nb's
Cr-W-Mo-V high alloy tool steel shear-steels, ingredient and mass percentage are (wt%)：C 0.54~0.64%, Si 0.4
~0.6%, Mn 0.25~0.5%, Cr6.0~6.8%, W 2.0~2.5%, Mo 1.4~1.8%, V 0.3~0.4%,
Co 0.18~0.3%, Nb 0.15~0.2%, S≤0.02%, P≤0.025%, Fe surpluses.This programme is known as
5Cr6W2Mo2VNb0.2 steel, the steel phasor calculated according to ingredient is referring to attached drawing 1-3.Have from the visible steel of phasor following special
Sign：
(1) when heating for 1050 DEG C~1060 DEG C, carbide molar fraction is 0.022, there is enough quenching residue carbonizations
Object prevents crystal grain from growing up；When generation M23C6 → M6C transformations of the annealing at 830 DEG C~840 DEG C, dissolving and precipitation process are conducive to
Annealing thinning microstructure.
Remaining carbide is mainly M6C after (2) 1050 DEG C of quenchings, secondly MC, microhardness is up to about respectively
HV1800 and HV2300 can improve wearability.Adding in 0.2%Nb makes MC type carbide dissolution temperature be increased to 1350 DEG C, on the contrary
During solidification since after 1350 DEG C tiny MC type carbide is precipitated, playing prevents overheat, thinning microstructure, improves the works such as wearability
With the phasor with not adding 0.2%Nb steel has apparent difference (referring to attached drawing 1-4).
(3) according to 1050 DEG C of the thermodynamics method calculating that balances each other austenite matrix composition when, can further calculate and quench
Fiery hardness and tempering hardness, respectively HRC62.6 and HRC63.6, technique and performance design are reasonable.
(2) technique and technological achievement that edge steel mechanical bit makes are as follows：
(1) shear-steel material is prepared according to mentioned component, including using electric induction furnace or electric induction furnace+electroslag remelting, ingot casting,
Then in 1100 DEG C~870 DEG C forging rollings plank into strips, then at 830 DEG C~840 DEG C spheroidizings, globular carbide size is main
It is distributed between 0.6 μm~1.5 μm (referring to attached drawing 2), annealing hardness HB227~255.
(2) shear-steel is with after mild steel zoarium, 1150 DEG C~1160 DEG C progress acid bronze alloy prickers are heated to using protective atmosphere
Material soldering edge steel, makes the Cr-W-Mo-V high alloy tool steel shear-steels containing micro Nb be welded on Q235 mild steel cutter hubs, and at once
Carry out air-blast quenching processing.Weld seam shear strength >=250MPa, 10 μm~15 μm of crystallite dimension of quenching (referring to attached drawing 3) are remaining
0.25 μm of carbide size average out to, full-size≤0.9 μm (referring to attached drawing 4).
(3) temper three times is carried out according to mechanical bit application type, temperature is at 530 DEG C~550 DEG C.530
DEG C~540 DEG C of tempering making slicing knifes, hardness HRC62~64, retained austenite≤5.5%；540 DEG C~550 DEG C tempering make
Peeling knife, hardness HRC60~62, retained austenite≤3.8%.Again through roughly grinding, refining, the mechanical processings such as pass be mechanical bit
Finished product, in addition, the material and technique can also be used for making hand papercutter etc..
Further explanation to the present invention：
1. the determining and experimental verification of the hardness calculation, Q-tempering temperature of alloy design
Our production, teaching ＆ research projects (national medium-sized and small enterprises innovation funds 13C26213402744) once research shows that, according to being designed to
Point median is calculated with the thermodynamics method that balances each other, austenite matrix composition when can calculate different quenching and all kinds of
Type residue carbide quantity and ingredient.Quenching hardness and tempering hardness can be calculated according to austenite matrix composition, returned after quenching
When fiery hardness and reasonable remaining carbide content, this temperature is just reasonable hardening heat.Temperature is according to not equality of temperature
Balance mutually calculates the various types carbide quantity decision of precipitation when spending.M23C6 Precipitation Temperatures are 480 DEG C~520 DEG C, M6C
Precipitation Temperature is 520 DEG C~540 DEG C, and MC Precipitation Temperatures are 540 DEG C~560 DEG C.According to all kinds of Carbide Precipitation amount comprehensive analysis,
It can determine rational tempering range.
According to austenite matrix composition under hardening heat, quenching hardness Hc may be calculated：
Hc=α (1+ β)/(0.00915 α+0.00527) (1)
In formula (1), α is the square root of C content in austenitic matrix；β is alloying element to martensitic matrix solution strengthening
Correction factor, be expressed as：
β=0.0079Si+0.0067Mn+0.0058Ni+0.0038Mo+0.0035V+0.0032W+0.00 31Cr (2)
The symbol of element is the content of each alloying element in austenitic matrix in formula (2), and wherein Nb is added in V, with following formula (3)
(5) it is identical.
Austenitic matrix carbon saturation formula is：
Cp=0.011W+0.02Mo+0.057Cr+0.19V (3)
Being tempered post-curing hardness formula is：
HRC=a (1+b)/(0.0127a+0.00297) (4)
A=(C in formula (4)S/ Cp) square root, wherein CSIt is C content in austenitic matrix；B is and carbide precipitation
Related correction factor, b values are：
B=0.00374 (Cr-6.69)+0.00907 (W-2.76)+0.00465 (Mo-1.70)+0.0419 (V-0.59)
(5)
It is hard to determine that the element is tempered precipitation-hardening for the comprehensive function of the relevant constant of each element and coefficient in formula (5)
The contribution of degree.
Trial production experiment composition of steel according to design ingredient melting is (wt%)：C 0.59%, Si 0.55%, Mn
0.46%, Cr6.8%, W 2.35%, Mo 1.56%, V 0.32%, Co 0.23%, Nb 0.18%, S/P≤0.02%, Fe
Surplus.It is according to the above-mentioned experiment steel result of calculation that is calculated：Rational 1050 DEG C, quenching hardness HRC62.6 of hardening heat, is returned
Fiery maximum hardness HRC63.6,540 DEG C of the corresponding temperature of maximum hardness.Heat treatment experiment verification is carried out according to result of calculation
As listed by the following table 1：
The trial production of table 1. experiment steel heat treatment quenching and tempering hardness experimental result
Heat treatment temperature and experiment of hardness result are consistent substantially with alloy design calculated value.Sample scans electron microscope analysis is shown
In attached drawing 2, remaining carbide size of annealing is mainly distributed between 0.6 μm~1.2 μm (referring to attached drawing 2)；Quench crystallite dimension
10 μm~15 μm (referring to attached drawing 3), remaining carbide are evenly distributed refinement, and carbide key dimension is about 0.25 μm, individually most
Large scale≤0.9 μm (referring to attached drawing 4).The alloy that the present invention is further demonstrated by testing the above-mentioned technical data obtained is set
Result of calculation is counted, also provides production technology and quality control index.
2. illustrate new material shear-steel alloy content and effect with reference to phasor
Fig. 1-1 in attached drawing 1 is 5Cr8WMo2VSi steel phasor of the 5Cr types containing W.From Fig. 1-1 as it can be seen that 1. the steel is 1050
DEG C~1060 DEG C heating when, carbide almost dissolves totally, so, be brazed quenching technical production machinery blade shear-steel residual carbon
Compound amount is very few, reduces the ability for hindering Austenite Grain Growth；2. carbide based on M23C6 (or M7C3), M6C,
M7C3 is secondary, MC hardly occurs；3. it in this case, has volume Mo to add in M23C6, although the hard of M23C6 can be improved
Degree and tempering Precipitation Temperature, but reduce the contribution to high rigidity M6C.Fig. 1-2 is 5Cr8WMo2VSi steel addition 0.2%Nb
Phasor, although MC dissolvings or Precipitation Temperature are increased to 1350 DEG C, without changing other carbides and quantity.
Fig. 1-3 in attached drawing 1 is the phasor of Cr-W-Mo-V high alloy tool steel of the new material containing micro Nb.It can from Fig. 1-3
See, compared with 5Cr shaped steel, since Cr contents are reduced to 6.0%~6.8%, W content is increased to 2.0%~2.5%, V content
Slightly increase and add in micro Nb, following variation occurs in phasor：1. when heating for 1050 DEG C~1060 DEG C, there is suitable quantity
Remaining carbide is undissolved, and based on M6C, and MC is secondary, and quantity is suitable；2. in 830 DEG C~840 DEG C anneal plus hot and colds
But during, it may occur that M23C6 carbide and M6C Carbide Phases co-conversions, dissolving and precipitation process can promote distribution of carbides
Uniformly refinement；3. micro V and Nb generates tiny MC carbide and remains degree of refinement in subsequent heat treatment process, due to adding
Enter micro Nb, MC carbide dissolutions or Precipitation Temperature is made to be increased to 1360 DEG C, can effectively hinder high-temperature region austenite grain
It grows up；4. in drawing process, into based on M6C, Mo is added thereto again because W-shaped, and therefore, tempering is precipitated based on M6C, secondly
M23C6 and MC, Precipitation Temperature are conducive to improve tempering hardness, effectively play the work of alloying element close to 540 DEG C of medium temperature
With.Fig. 1-4 is phasor when new material steel is not added with micro Nb, advantageous to the refinement of steel at this time, although and a kind of excellent super
Fine carbides steel still, when heating 1050 DEG C~1060 DEG C soldering quenchings, easily makes MC be dissolved completely in austenite, makes
Into abnormal grain growth.Cr-W-Mo-V high alloy tool steel of the new material containing micro Nb is additionally added a small amount of Co, primarily to
Enhancing bonds the effect of carbide particle.Because carbide particle is once exposed on point of a knife, the power that is easily hit is peeled off, and influences sword
Mouth sharpness and wearability.
New material alloy design is that calculating heterogeneity combination according to the method described above obtains as a result, with reference to smelting process reality
Border, analysis, which is compared, determines alloy component range.
3. new material inlays steel mechanical bit embodiment
Embodiment 1
The high alloy tool steel edge steel mechanical bit shear-steel of the present embodiment trace niobium-containing can be above-mentioned experiment steel, all manufacture
Process route is：Steel smelting → shear-steel forging rolling → annealing → cutter hub blanking → smoothing → shear-steel processing flour milling → milling side → milling is slightly
→ cropping → cutter hub channeling → shear-steel, cutter hub assembling → fixture installation → into controlled atmosphere generator → preheating, leads to controllable gas at copper sheet
Body → be warming up to high temperature → soldering, Quench heating → moves to cooling chamber → air-blast quenching → three times tempering → smoothing and alignment → knife
Piece processing plane the side → milling cutter back of the body → cropping → fine grinding face → drilling (drilling, hole milling, tapping) → essence smoothing → mill slightly → quality inspection →
Finished product.
Timber processes slicing knife and cutting blade stock size is as shown in table 2：
2 Finished blades stock size (mm) of table
The edge steel mechanical bit structure diagram of Cr-W-Mo-V high alloy tool steel new material shear-steels containing micro Nb is for example attached
Shown in Fig. 5, shear-steel 2 is set on cutter hub 1.Shear-steel thickness 5mm~8mm, shear-steel width are about 80mm~110mm by user's requirement.
The finished product the key technical indexes quality test results of trial-production are as shown in table 3.
3 Finished blades the key technical indexes quality test results of table
New material mechanical bit is tried out in wood-working factory, and slicing knife, which often sharpens a slicing Manchurian ash timber, continuously to be made
With 8-12 hours, sliced venceer thickness was 0.8mm~1mm, and the quantity of sliced venceer is 1.2 ten thousand~1.5 ten thousand, and service life is
1.5 times of 5Cr8WMo2VSi blades.Peeling knife often sharpens a rotary-cut birch and can be used continuously 8-10 hours, and cutting edge does not collapse not
Volume, service life improve 1 times, eliminate cutting edge burr and collapse dental phenomenon, and rotating plate thickness is 1.5mm~2mm, and plate face is smooth
It is indefectible.
Embodiment 2
The edge steel mechanical bit of the shear-steel of the present embodiment, shear-steel ingredient and mass percentage are (wt%)：C
0.62%, Si0.58%, Mn 0.25%, Cr6.3%, W 2.15%, Mo1.62%, V 0.36%, Co 0.18%, Nb
0.17%, S≤0.02%, P≤0.025%, Fe surplus.During processing, first using after electric induction furnace or electric induction furnace smelting through electricity
Slag remelting ingot casting tool of production steel, the then forging rolling under the conditions of 890 DEG C, 840 DEG C of annealing.Using 1050 DEG C~1053 DEG C carry out prickers
Quench heating is welded, makes the ingredient shear-steel with brass soldering mounting on the cutter hub of mild steel or medium carbon steel, and be carried out at the same time air-cooled
Quenching treatment.Temper three times is carried out at 540 DEG C -550 DEG C and makes peeling knife.
Embodiment 3
The edge steel mechanical bit of the shear-steel of the present embodiment, shear-steel ingredient and mass percentage are (wt%)：C
0.59%, Si0.47%, Mn0.32%, Cr 6.4%, W 2.2%, Mo 1.5%, V0.32%, Co 0.20%, Nb
0.15%, S≤0.02%, P≤0.025%, Fe surplus.During processing, first using after electric induction furnace or electric induction furnace smelting through electricity
Slag remelting ingot casting tool of production steel, the then forging rolling under the conditions of 1050 DEG C, 840 DEG C of annealing.Using 1054 DEG C~1058 DEG C progress
Quench heating is brazed, makes the ingredient shear-steel with brass soldering mounting on the cutter hub of Q235 mild steel, and be carried out at the same time air-cooled quench
Fire processing.Temper three times is carried out at 532 DEG C -536 DEG C and makes slicing knife.
Schematically the present invention and embodiments thereof are described above, this describes no restricted, institute in attached drawing
What is shown is also one of embodiments of the present invention, and practical structure is not limited thereto.So if common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (6)
1. a kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb, ingredient and weight percent are：C
0.54~0.64%, Si0.4~0.6%, Mn0.25~0.5%, Cr 6.0~6.8%, W 2.0~2.5%, Mo 1.4~
1.8%, V0.3~0.4%, Co 0.18~0.3%, Nb 0.15~0.2%, S≤0.02%, P≤0.025%, Fe surpluses.
2. a kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb according to claim 1, special
Sign is：Using electroslag remelting ingot casting after electric induction furnace or electric induction furnace, with and subsequent 870 DEG C~1100 DEG C forging rollings and 840
DEG C annealing processing step.
3. a kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb according to claim 2, special
Sign is：Soldering Quench heating is carried out using 1050 DEG C~1060 DEG C, the ingredient shear-steel is made to be brazed with copper-based filler metal and is spliced
On the cutter hub of mild steel, and it is carried out at the same time air-blast quenching processing.
4. a kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb according to claim 3, special
Sign is：Temper three times is carried out according to mechanical bit application type, temperature is 530 DEG C -550 DEG C.
5. a kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb according to claim 4, special
Sign is：530 DEG C of -540 DEG C of tempering make slicing knife, and 540 DEG C of -550 DEG C of tempering make peeling knife.
6. a kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb according to claim 1, special
Sign is：The edge steel mechanical bit shear-steel welding performance and shear-steel tissue and Properties Control index：Soldered seam shear strength >=
250MPa, shear-steel microscopic structure is tempered martensite, carbide adds retained austenite, remaining 0.25 μ of carbide size average out to
M, full-size≤0.9 μm, remained austenite content≤5.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711399631.5A CN108130478A (en) | 2017-12-22 | 2017-12-22 | A kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711399631.5A CN108130478A (en) | 2017-12-22 | 2017-12-22 | A kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108130478A true CN108130478A (en) | 2018-06-08 |
Family
ID=62391471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711399631.5A Pending CN108130478A (en) | 2017-12-22 | 2017-12-22 | A kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108130478A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983186A (en) * | 2019-12-23 | 2020-04-10 | 镇江中森科技有限公司 | High alloy tool steel, method for manufacturing same, and method for using same as cutting edge steel insert-joint slicing knife |
| CN111607760A (en) * | 2019-11-13 | 2020-09-01 | 哈尔滨理工大学 | M50 steel pulse electron beam irradiation Nb-W-Cr-Mo alloying method |
| WO2022158218A1 (en) * | 2021-01-21 | 2022-07-28 | 兼房株式会社 | Long cutting tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962738A (en) * | 2010-11-10 | 2011-02-02 | 常州机械刀片有限公司 | Superfine carbide high-alloy tool steel shear-steel splicing mechanical blade |
| CN102766817A (en) * | 2012-08-15 | 2012-11-07 | 安徽嘉龙锋钢刀具有限公司 | Semi-high speed steel shear steel |
-
2017
- 2017-12-22 CN CN201711399631.5A patent/CN108130478A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962738A (en) * | 2010-11-10 | 2011-02-02 | 常州机械刀片有限公司 | Superfine carbide high-alloy tool steel shear-steel splicing mechanical blade |
| CN102766817A (en) * | 2012-08-15 | 2012-11-07 | 安徽嘉龙锋钢刀具有限公司 | Semi-high speed steel shear steel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111607760A (en) * | 2019-11-13 | 2020-09-01 | 哈尔滨理工大学 | M50 steel pulse electron beam irradiation Nb-W-Cr-Mo alloying method |
| CN110983186A (en) * | 2019-12-23 | 2020-04-10 | 镇江中森科技有限公司 | High alloy tool steel, method for manufacturing same, and method for using same as cutting edge steel insert-joint slicing knife |
| WO2022158218A1 (en) * | 2021-01-21 | 2022-07-28 | 兼房株式会社 | Long cutting tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5121775B2 (en) | Ni-Cr alloy blade manufacturing method | |
| CN102766817B (en) | Semi-high speed steel shear steel | |
| EP1739199B1 (en) | Martensitic stainless steel | |
| CN100469938C (en) | Series superfine carbide high alloy tool steel | |
| CN102776446B (en) | Semi-high speed steel copper soldering inlaid steel cutting blade and manufacturing method thereof | |
| CN108130478A (en) | A kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb | |
| CN101403074A (en) | Novel chromium system hot die steel and thermal treatment process thereof | |
| CN106086620B (en) | A kind of forging cutting teeth and its manufacture method | |
| CN102010964A (en) | Heating treatment technology for low-alloy bucket lip mesh tape | |
| CN110408844A (en) | A kind of wood cutter mould steel and its manufacturing method | |
| CN101962738B (en) | Superfine carbide high-alloy tool steel shear-steel splicing mechanical blade | |
| CN110205562A (en) | A kind of mould steel and preparation method thereof | |
| JP4984321B2 (en) | Pre-hardened steel excellent in machinability and toughness and method for producing the same | |
| CN101597715B (en) | Iron-based high-temperature alloy material for guide roller and preparation method thereof | |
| CN100462469C (en) | Cold and hot shearing edge steel for shearing thick plate | |
| JP2015218384A (en) | HIGH-STRENGTH 13Cr-BASED STAINLESS THICK STEEL PLATE EXCELLENT IN TOUGHNESS AND WORKABILITY AND PRODUCTION METHOD THEREOF | |
| CN108570626A (en) | Cut drill wear-resisting no cobalt high speed steel and its preparation process | |
| CN104357753B (en) | Preparation technique of rare-earth 0Cr17Ni4Cu4Nb chemical fiber spinneret die steel | |
| CN110983186A (en) | High alloy tool steel, method for manufacturing same, and method for using same as cutting edge steel insert-joint slicing knife | |
| CN107937810A (en) | A kind of phosphorus-containing alloy high-speed steel | |
| JP2001123247A (en) | Cold tool steel excellent in machinability | |
| CN107974617A (en) | A kind of carbon containing high-speed steel | |
| JPS62196324A (en) | Manufacture of high carbon martensitic stainless steel suitable for quenching treatment | |
| CN105624576A (en) | Preparing method for half-high-speed steel blade steel | |
| CN107937821A (en) | A kind of wear-resisting high-vandium steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180608 |
|
| RJ01 | Rejection of invention patent application after publication |