CN102766817B - Semi-high speed steel shear steel - Google Patents
Semi-high speed steel shear steel Download PDFInfo
- Publication number
- CN102766817B CN102766817B CN201210289225.4A CN201210289225A CN102766817B CN 102766817 B CN102766817 B CN 102766817B CN 201210289225 A CN201210289225 A CN 201210289225A CN 102766817 B CN102766817 B CN 102766817B
- Authority
- CN
- China
- Prior art keywords
- steel
- high speed
- semi
- shear
- speed steel
- 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.)
- Active
Links
Images
Abstract
The invention discloses semi-high speed steel shear steel and belongs to the technical field of mechanical blades. The semi-high speed steel shear steel comprises, by weight, 0.56-0.65% of C, 0.40-0.60% of Si, 0.25-0.40% of Mn, 6.0-6.8% of Cr, 1.6-2.5% of W, 4.2-5.2% of Mo, 0.7-0.9% of V, 0.1-0.2% of Nb, 0.3-0.4% of Co or Ni, S<=0.02%, P<=0.025% and the balance Fe. The hardness of copper brazing steel plated paper cutting blades prepared by the semi-high speed steel shear steel is identical with that of the existing high speed steel copper brazing steel plated paper cutting blades, but the blades are higher in sharpness and easy to grind, and material and process costs are reduced.
Description
Technical field
The present invention relates to the technical field of mechanical bit, more particularly, relate to a kind of semi-high speed steel shear-steel, this semi-high speed steel shear-steel is especially suitable for using as the shear-steel of semi-high speed steel braze wilding edge steel paper cutting blade.
Background technology
The use properties of paper cutting blade should have high sharpness and wear resistance, also will have and not collapse the excellent impact resistance do not rolled up and certain thermohardening.
In the past, paper cutting blade was mainly the edge steel paper cutting blade that CrWMn steel and rapid steel are made as shear-steel.CrWMn steel is made the edge steel scudding knife of shear-steel, and hardness is HRC61～63, is mainly used in shearing the paper cutting blade of soft paper; W18Cr4V or W6Mo5Cr4V2 rapid steel are made the edge steel paper cutting blade of shear-steel, and hardness is HRC64～66, is mainly used in shearing the scudding knifes such as high quality high strength paper or fiber board.At present, the processing method that shear-steel is spliced at soft steel cutter hub has two kinds: (1) adopts hot rolling welding rapid steel scudding knife, for example, the rapid steel of the domestic employing patent ZL200510028805.8 having and soft steel non-oxidation edge technique processed, weld seam shearing resistance 200 N/mm
2～300 N/mm
2; (2) the rapid steel braze wilding that the good imperial high-speed steel cutter in Anhui company limited the adopts Technology of splicing, is the same with the paper cutting blade of the world shear-steel of the same type technique of splicing, and weld seam Jian cuts Qiang Du≤196N/mm
2, welding strength is a little less than the high-temperature oxidation-free pressure rolling technique of splicing.In fact, for being only subject to the edge steel paper cutting blade of longitudinal shear power effect, braze wilding edge hardness of steel can be to meet the shearing resistance requirement of paper cutting blade, but need to further stabilize and increase; And although hot rolling welding edge steel method can obtain higher welding strength, but, for rapid steel or semi-high speed steel shear-steel, the too high Heating temperature steel face of easily burning during hot rolling, excessive deflection because of shear-steel and cutter hub plasticity difference excessive, not only hinder the continuity of the bonding surface of Liao Ge road pressure rolling welding, but also can produce internal fissure from banded defect in the middle of shear-steel, become semi-high speed steel or rapid steel paper cutting blade and produce the high difficult problem of scrap rate.
Blade cutting edge sharpness and wear resistance depend primarily on quantity and the distribution of yield strength, hardness and the carbide of shear-steel.Carbide in blade shear-steel exists, and has both played wear-resisting effect, also plays the effect of point of a knife crack arrest, meanwhile, and the disadvantageous effect that also has cutting edge carbide to come off.Carbide refinement in blade shear-steel can improve obdurability and make blade keep smoothly sharp, and the excessive carbide of alligatoring easily peels off, and makes on the contrary sharpness and wear resistance decline.Therefore, shear-steel requires have high hardness and yield strength, and in its tissue, carbide refinement will reach high level (≤2 um), and quenching residual carbon compound quantity, distributing has strict restriction, too much and skewness, cutting edge carbide comes off both affects sharpness to quantity, also affects wear resistance; Quantity is very few or do not have, and the tiny crack of cutting edge can be expanded along cleavage surface, forms larger chipping.
Paper cutting blade keeps cutting edge sharpness and sharpening very important while shearing, residue carbide volume fraction after rapid steel Q-tempering is between 15%～22%, residual carbon compound is of a size of 2.5 um～15 um, the carbide of cutting edge easily comes off, both can reduce sharpness, also easily cause chipping in shear history.In recent years, our research and analytic demonstration are thought, if adopt suitable semi-high speed steel shear-steel, reduce in shear-steel between carbide quantity to 3%～8%, matrix Q-tempering hardness keeps again the level of rapid steel, can be conducive to improve paper cutting blade sharpness, wearing quality and be sheared face smooth finish, and having reduced the alloy amount cost of shear-steel, also having improved anufacturability.Existing semi-high speed steel patent and the technology that is applied to other tool and moulds reported more both at home and abroad, but be all not suitable for carbide size and the quantative attribute of paper cutting blade shear-steel, the lower hardness also having, the semi-high speed steel composition of announcing such as patent No. ZL200610085881.7 and application number 201010292113.5 etc.
In addition, Chinese Patent Application No. 201110431102.5, the name of innovation and creation is called: a kind of high-speed tool steel for drill bit, its component proportion is: C:0.90-0.98%; W:5.00-5.80%; Mo:4.00-4.60%; Cr:3.80-5.00%; V:1.80-2.20%; Mn:0.25-0.45%; Si:0.20-0.40%; Nb:0.08-0.30%; Co:1.30-1.60%; P :≤0.03%; S :≤0.03%; All the other are Fe.And for example, Chinese Patent Application No. 200910264467.6, the name of innovation and creation is called: wear-resistant high speed steel, the mass percent of its each composition is as follows: C:0.88-0.98%; W:4.30-4.80%; Mo:2.70-3.10%; Cr:3.80-4.30%; V:1.80-2.20%; Mn:0.20-0.40%; Si:1.10-1.50%; Nb:0.08-0.16%; Co:1.20-1.80%; P :≤0.03%; S :≤0.03%; All the other are Fe, the steel grades that this application case is rapid steel.Above-mentioned two application cases have mainly overcome original tool steel and have had quenching temperature narrow range, the lower problem in work-ing life of cutter, the composition adjustment of steel grade is mainly in order to reduce the consumption of noble metal tungsten and molybdenum, when but above-mentioned steel is used as the shear-steel of paper cutting blade, its sharpness, sharpening and hardness all need further reinforcement.
In this case, mainly new paper cutting blade shear-steel material is all being sought by mechanical bit factory both at home and abroad, to substituting rapid steel edge steel paper cutting blade.But, a lot of high alloy shear-steel materials that existing mechanical bit field is used, organizing of having is suitable, and hardness can only reach HRC60-63, does not reach the firmness level of rapid steel; Some steel hardness is suitable, but residual carbon compound is too much, and banded structure is heavier, can not improve significantly again the sharpness of rapid steel blade.To so far, although existing, adopt special high quality steel to make the alternative rapid steel shear-steel edge of shear-steel steel paper cutting blade both at home and abroad, but hardness is all on the low side, can only reach HRC61～63, still do not work out all suitable shear-steel materials of tissue and performance, make hardness reach the level of rapid steel HRC64～66, and make the use propertieies such as sharpness obviously be better than again the edge steel paper cutting blade of rapid steel.
Summary of the invention
the technical problem that invention will solve
The object of the invention is to overcome the low and poor deficiency of sharpening of prior art high speed steel edge steel paper cutting blade sharpness, a kind of semi-high speed steel shear-steel is provided, the paper cutting blade that the shear-steel material of employing optimization design of the present invention prepares, its hardness reaches HRC64～66, sharpness and sharpening performance are obviously better than the edge steel paper cutting blade that rapid steel is made shear-steel, and have reduced the alloy amount cost of shear-steel.
technical scheme
For achieving the above object, technical scheme provided by the invention is:
A kind of semi-high speed steel shear-steel of the present invention, is comprised of the chemical element of following weight percentage: C:0.56～0.65%, Si:0.40～0.60%, Mn:0.25～0.40%, Cr:6.0～6.8%, W:1.6～2.5%, Mo:4.2～5.2%, V:0.7～0.9%, Nb:0.1～0.2%, one of Co or Ni: 0.3～0.4%, S≤0.02%, P≤0.025%, all the other are Fe.
Preferably, described semi-high speed steel shear-steel is comprised of the chemical element of following weight percentage: C:0.58～0.62%, Si:0.48～0.52%, Mn:0.28～0.38%, Cr:6.12～6.60%, W:1.82～2.28%, Mo:4.45～4.94%, V:0.76～0.81%, Nb:0.13～0.16%, one of Co or Ni: 0.32～0.38%, S≤0.02%, P≤0.025%, all the other are Fe.
Semi-high speed steel shear-steel Composition Design principle of the present invention is: (1) is C, Cr, W, Mo, the collocation of V content reasonably, guarantee carbide quantity, distribution, and enough intensity, toughness, add a small amount of suitable Nb to improve the ratio of MC in carbide, and improve the solvent temperature of MC carbide in austenite, make it quenching temperature and reach 1160 ℃～1180 ℃ and quench to be suitable for braze wilding simultaneously; And prevent again the too high massive carbide when eliminating molten steel solidification of MC carbide solvent temperature in austenite, and guaranteed high yield strength and impact toughness index, avoid blade cutting edge within the usage period, to occur burr and chipping; (2) add a small amount of suitable Ni or Co to improve matrix with the bonding force of carbide, the tendency that comes off of carbide particle while reducing cutting edge wearing and tearing, and hinder annealing process atomic diffusion and promote refinement carbide, wherein containing Ni also help raising yield strength, strengthen the effect of cutting edge sharpness stronger; Containing Co make carbide and basal body binding force stronger, can be according to mechanical bit type selecting; (3) rational Cr, W, Mo, V ratio, utilize the variation of dissimilar carbide phase constituent to make it precipitation hardening near tempering secondary hardening maximum hardness district, at C content and more much lower than rapid steel containing W amount in the situation that, obtain high tempered-hardness, hardness reaches the level of W18Cr4V or W6Mo5Cr4V2 rapid steel.
For semi-high speed steel shear-steel composition range of the present invention, control and be described as follows: C content is low higher than the upper impelling strength of prescribing a time limit, lower than lower Q-tempering lower hardness in limited time; Si content increases and surface decarburization is increased the weight of higher than upper fragility in limited time, lower than lower strength decreased in limited time; Containing Mn amount, higher than upper fragility in limited time, increase, lower than lower strength decreased in limited time; Containing Cr amount, higher than upper time quenching remained austenite content, increase, and make tempering temperature depart from the maximum hardness point of precipitation hardening, lower than the hardening capacity of lower steel in limited time, reduce and make dry quenching lower hardness; Containing W amount, higher than upper M6C carbide size in limited time, increase, lower than lower tempered-hardness in limited time, reduce; Higher measures containing Mo the composition that has changed all kinds of carbide, make tempering Precipitation temperature near or speed accelerate, be conducive to reduce remained austenite content, improve tempered-hardness, the hardness that is tempering secondary hardening reaches the key that universal high speed molten steel is flat, but low higher than the upper high-temp plastic of prescribing a time limit containing Mo amount, lower than lower tempered-hardness in limited time, obviously reduce; V content is higher than the upper massive carbide that easily occurs in limited time, and lower than lower MC carbide quantity not sufficient in limited time, and in austenite, solvent temperature reduces, and when quenching for 1160 ℃～1180 ℃, residual carbon compound MC quantity is very few, hinders grain growth ability variation; Add a small amount of Nb solvent temperature of MC carbide in austenite that obviously raise, can effectively hinder the Austenite Grain Growth while quenching heating, but too high levels not only easily occurs massive carbide but also increased material cost; Containing Ni or Co amount, lower than lower bonded carbon compound effect in limited time, reduce, Ni is higher than the upper annealing of impact in limited time nodularization, and Co not only affects impelling strength but also increased material cost higher than the upper limit.In a word, shear-steel composition will strictly possess microstructure characteristic, technology characteristics and the performance characteristic of paper cutting blade shear-steel.Shear-steel microstructure of the present invention and performance are applicable to paper cutting blade, and shear-steel processing performance is applicable to braze wilding, quench simultaneously.
beneficial effect
Adopt technical scheme provided by the invention, compare with existing known technology, there is following unusual effect:
(1) a kind of semi-high speed steel shear-steel of the present invention, its shear-steel microstructure had both been applicable to the performance requriements of paper cutting blade, be applicable to again the requirement of the blades such as wood working, shear-steel has the suitable microstructure of edge steel paper cutting blade, its sharpness and impelling strength, higher than rapid steel shear-steel, have improved use properties;
(2) a kind of semi-high speed steel shear-steel of the present invention, reduced quenching residual carbon compound quantity, and carbide reasonable quantity in steel, refinement is evenly distributed, not only alleviated the cutting edge carbide particle degree that comes off, guaranteed durability, and be also easy to mechanical sharpening and hand lapping in using, and avoided blade cutting edge within the usage period, to occur burr and chipping, improved the smooth finish of shearing;
(3) a kind of semi-high speed steel shear-steel of the present invention, can under relatively low alloying condition, obtain high secondary hardening tempered-hardness, relative with C content low in the situation that in total alloy amount, can obtain the hardness identical with rapid steel, its hardness reaches HRC64～66, and has reduced material cost and process costs;
(4) a kind of semi-high speed steel shear-steel of the present invention, its hardness is identical with rapid steel, but low, the easy sharpening of cost, use properties are high, overcome the drawback of rapid steel edge steel mechanical bit, in fields such as papermaking, printing, packing and wood working, have a wide range of applications.
Accompanying drawing explanation
Fig. 1 is the equilibrium phase diagram of semi-high speed steel shear-steel in the present invention;
Fig. 2 is semi-high speed steel shear-steel annealing stereoscan photograph in embodiment 1;
Fig. 3 is metallograph after blade shear-steel Q-tempering in embodiment 1;
Fig. 4 is stereoscan photograph after blade shear-steel Q-tempering in embodiment 1;
The semi-high speed steel braze wilding that Fig. 5 is prepared for the semi-high speed steel shear-steel of employing embodiment 1 is inlayed the structural representation of steel paper cutting blade.
Label declaration in schematic diagram: 1-semi-high speed steel shear-steel; 2-braze wilding layer; 3-cutter hub.
Embodiment
For further understanding content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
embodiment 1
Semi-high speed steel braze wilding edge steel paper cutting blade prepared by the semi-high speed steel shear-steel of employing the present embodiment, paper cutting blade is welded on cutter hub 3 and makes through braze wilding by semi-high speed steel shear-steel 1, and the composition of this semi-high speed steel shear-steel 1 is as shown in table 1.Its concrete preparation method is as follows:
(1) produce semi-high speed steel shear-steel:
First prepare semi-high speed steel shear-steel, adopt induction furnace or induction furnace+electric slag refusion and smelting semi-high speed steel shear-steel, meeting semi-high speed steel shear-steel of the present invention is comprised of the chemical element of following weight percentage: C:0.56～0.65%, Si:0.40～0.60%, Mn:0.25～0.40%, Cr:6.0～6.8%, W:1.6～2.5%, Mo:4.2～5.2%, V:0.7～0.9%, Nb:0.1～0.2%, one of Co or Ni: 0.3～0.4%, S≤0.02%, P≤0.025%, all the other are Fe and inevitable impurity; The Composition Design of shear-steel of the present invention is to analyze alloy system balance each other weave construction and the phase transition process of calculation of thermodynamics, and carried out Q-tempering hardness and thermal treatment temp and calculated, and compared on the basis that between alloy atom, cohesive energy calculation is associated with performance and proposition.Specifically, the alloy designs of semi-high speed steel comprises Composition Design, organizational structure design, technological design and four aspects of performance prediction.According to the feature of high-carbon alloy steel, first with the thermodynamics method that balances each other, for carbide and quantity and change law thereof, carry out the prediction of carbide refinement; Secondly, the matrix composition calculating according to the thermodynamics method that balances each other, then carry out the calculating prediction of quenching hardness and tempered-hardness; Then, according to the A calculating
1the definite annealing temperature of point, determines quenching temperature scope according to quenching undissolved carbide quantity and hardness, from tempering carbide precipitate type and quantitative proportion, estimates the temperature of high secondary hardening, with this, determines tempering temperature; Finally, according to calculating combination energy and the hardness of martensitic matrix structure cell on electronics, atom level, infer yield strength and toughness index.Finally, analyze the data of the heterogeneity steel of more all calculating, the requirement of contrast mechanical bit use properties, optimized choice goes out semi-high speed steel shear-steel composition.The semi-high speed steel shear-steel composition of the present embodiment is as shown in table 1.
Composition/the wt% of the semi-high speed steel shear-steel material of table 1 embodiment 1 ~ 5
(2) forging rolling operation:
The semi-high speed steel shear-steel that step (1) is smelted carries out forging rolling, and forging rolling temperature is 950 ℃ ~ 1000 ℃.
(3) annealing:
The semi-high speed steel shear-steel of step (2) forging rolling is heated to 850 ℃, is incubated furnace cooling after 5 hours; As shown in Figure 1,850 ℃～860 ℃ temperature ranges, M23C6 and M6C growth and decline each other, are conducive to annealing process carbide refinement to semi-high speed steel shear-steel equilibrium phase diagram.The semi-high speed steel shear-steel annealing stereoscan photograph of the present embodiment is as shown in Fig. 2 (5000 *), and carbide mean sizes is less than 1.5 μ m.
(4) braze wilding quenches simultaneously: the semi-high speed steel shear-steel after step (3) is processed is heated to 1170 ℃ and carries out braze wilding edge steel, this braze wilding edge steel technology is existing common technology, semi-high speed steel shear-steel 1 is welded on soft steel cutter hub 3 and makes paper cutting blade, between semi-high speed steel shear-steel 1 and soft steel cutter hub 3, be braze wilding layer 2(as shown in Figure 5), and carry out quench treatment simultaneously, air cooling after 1.3 minutes/mm of insulation, the paper cutting blade soaking time that is every centimetre of thickness is 1.3 minutes, reason is that paper cutting blade is plate workpiece, soaking time is by THICKNESS CALCULATION, during concrete production, in the time of 1170 ℃, to carry out the operation of braze wilding edge steel, and be incubated air cooling after 1.3 minutes/mm, complete quenching.Not exclusively the undissolved carbide quantity of austenitizing is (referring to Fig. 1) between 3～8vt%, can effectively hinder Austenite Grain Growth.After blade shear-steel Q-tempering, metallograph is as shown in Fig. 3 (500 *), and quenching grain fineness number is 10 grades.
(5) tempering:
The paper cutting blade of step (4) is heated to 550 ℃, is incubated 3 hours, tempering 2 times.
After above-mentioned steps is processed, through mechanical workout, mechanical workout comprises the processing step of smoothing, ground finish, milling hole type etc., creates edge steel paper cutting blade.Blade shear-steel stereoscan photograph after tempering is as shown in Fig. 4 (4000 *), and residual carbon compound quantity is 3.8%～5.8%, mean sizes≤1.5 μ m.As shown in Figure 5, the blade of the present embodiment is suitable as paper cutting blade and uses the structural representation of the paper cutting blade of this semi-high speed steel braze wilding edge steel, and wherein paper cutting blade stock size is as shown in table 2.
The stock size of table 2 scudding knife
In the semi-high speed steel braze wilding edge steel paper cutting blade of the present embodiment, the experiment of hardness result of semi-high speed steel shear-steel is as shown in table 3.
The experiment of hardness value of table 3 embodiment 1 semi-high speed steel shear-steel
embodiment 2
Semi-high speed steel braze wilding edge steel paper cutting blade prepared by the semi-high speed steel shear-steel of employing the present embodiment, paper cutting blade is welded on cutter hub 3 and makes through braze wilding by semi-high speed steel shear-steel 1, and the composition of this semi-high speed steel shear-steel 1 is as shown in table 1.Its concrete preparation method is as follows:
(1) produce semi-high speed steel shear-steel:
First prepare semi-high speed steel shear-steel, adopt induction furnace or induction furnace+electric slag refusion and smelting semi-high speed steel shear-steel, its composition is as shown in table 1.
(2) forging rolling operation:
The semi-high speed steel shear-steel that step (1) is smelted carries out forging rolling, and forging rolling temperature is 870 ℃ ~ 930 ℃.
(3) annealing:
The semi-high speed steel shear-steel of step (2) forging rolling is heated to 860 ℃, is incubated furnace cooling after 4 hours.
(4) braze wilding quenches simultaneously:
Semi-high speed steel shear-steel after step (3) is processed is heated to 1160 ℃ and carries out braze wilding edge steel, semi-high speed steel shear-steel 1 is welded on soft steel cutter hub 3 and makes paper cutting blade, and carry out quench treatment simultaneously, air cooling after 1.5 minutes/mm of insulation.
(5) tempering:
The paper cutting blade of step (4) is heated to 540 ℃, is incubated 2 hours, tempering 3 times.
The experiment of hardness result of the semi-high speed steel shear-steel of the present embodiment is as shown in table 4, and after 540 ℃ of tempering, its hardness is HRC66.
The experiment of hardness value of table 4 embodiment 2 semi-high speed steel shear-steels
Semi-high speed steel braze wilding edge steel paper cutting blade prepared by the semi-high speed steel shear-steel of employing the present embodiment, paper cutting blade is welded on cutter hub 3 and makes through braze wilding by semi-high speed steel shear-steel 1, and the composition of this semi-high speed steel shear-steel 1 is as shown in table 1.Its concrete preparation method is as follows:
(1) produce semi-high speed steel shear-steel:
First prepare semi-high speed steel shear-steel, adopt induction furnace or induction furnace+electric slag refusion and smelting semi-high speed steel shear-steel, its composition is as shown in table 1.
(2) forging rolling operation:
The semi-high speed steel shear-steel that step (1) is smelted carries out forging rolling, and forging rolling temperature is 940 ℃ ~ 990 ℃.
(3) annealing:
The semi-high speed steel shear-steel of step (2) forging rolling is heated to 850 ℃, is incubated furnace cooling after 6 hours.
(4) braze wilding quenches simultaneously:
Semi-high speed steel shear-steel after step (3) is processed is heated to 1170 ℃ and carries out braze wilding edge steel, semi-high speed steel shear-steel 1 is welded on soft steel cutter hub 3 and makes paper cutting blade, and carry out quench treatment simultaneously, air cooling after 1.2 minutes/mm of insulation.
(5) tempering:
The paper cutting blade of step (4) is heated to 545 ℃, is incubated 3 hours, tempering 3 times.
The dimensions of the semi-high speed steel shear-steel of the present embodiment is mm * 12.7,1080mm * 127 mm, and its experiment of hardness result is as shown in table 5, and after 545 ℃ of tempering, its hardness is HRC65.9.Semi-high speed steel braze wilding edge steel paper cutting blade sharpening prepared by the semi-high speed steel shear-steel of employing the present embodiment is sheared 18 hours for 1 time, and rapid steel blade sharpening also can only be sheared 16～18 hours for 1 time.
The experiment of hardness value of table 5 embodiment 3 semi-high speed steel shear-steels
embodiment 4
Semi-high speed steel braze wilding edge steel paper cutting blade prepared by the semi-high speed steel shear-steel of employing the present embodiment, paper cutting blade is welded on cutter hub 3 and makes through braze wilding by semi-high speed steel shear-steel 1, and the composition of this semi-high speed steel shear-steel 1 is as shown in table 1.Its concrete preparation method is as follows:
(1) produce semi-high speed steel shear-steel:
First prepare semi-high speed steel shear-steel, adopt induction furnace or induction furnace+electric slag refusion and smelting semi-high speed steel shear-steel, its composition is as shown in table 1.
(2) forging rolling operation:
The semi-high speed steel shear-steel that step (1) is smelted carries out forging rolling, and forging rolling temperature is 960 ℃ ~ 1010 ℃.
(3) annealing:
The semi-high speed steel shear-steel of step (2) forging rolling is heated to 855 ℃, is incubated furnace cooling after 6 hours.
(4) braze wilding quenches simultaneously:
Semi-high speed steel shear-steel after step (3) is processed is heated to 1180 ℃ and carries out braze wilding edge steel, semi-high speed steel shear-steel 1 is welded on soft steel cutter hub 3 and makes paper cutting blade, and carry out quench treatment simultaneously, air cooling after 1.2 minutes/mm of insulation.
(5) tempering:
The paper cutting blade of step (4) is heated to 540 ℃, is incubated 4 hours, tempering 3 times.
The dimensions of the semi-high speed steel shear-steel of the present embodiment is 1785mm * 160mm * 12.7mm, and its experiment of hardness result is as shown in table 6, and after 540 ℃ of tempering, its hardness is HRC65.8.Semi-high speed steel braze wilding edge steel paper cutting blade sharpening prepared by the semi-high speed steel shear-steel of employing the present embodiment is sheared 22 hours for 1 time, and rapid steel blade sharpening also can only be sheared 16～18 hours for 1 time.
The experiment of hardness value of table 6 embodiment 4 semi-high speed steel shear-steels
embodiment 5
Semi-high speed steel braze wilding edge steel paper cutting blade prepared by the semi-high speed steel shear-steel of employing the present embodiment, paper cutting blade is welded on cutter hub 3 and makes through braze wilding by semi-high speed steel shear-steel 1, and the composition of this semi-high speed steel shear-steel 1 is as shown in table 1.Its concrete preparation method is as follows:
(1) produce semi-high speed steel shear-steel:
First prepare semi-high speed steel shear-steel, adopt induction furnace or induction furnace+electric slag refusion and smelting semi-high speed steel shear-steel, its composition is as shown in table 1.
(2) forging rolling operation:
The semi-high speed steel shear-steel that step (1) is smelted carries out forging rolling, and forging rolling temperature is 1130 ℃ ~ 1180 ℃.
(3) annealing:
The semi-high speed steel shear-steel of step (2) forging rolling is heated to 860 ℃, is incubated furnace cooling after 4 hours.
(4) braze wilding quenches simultaneously:
Semi-high speed steel shear-steel after step (3) is processed is heated to 1160 ℃ and carries out braze wilding edge steel, semi-high speed steel shear-steel 1 is welded on soft steel cutter hub 3 and makes paper cutting blade, and carry out quench treatment simultaneously, air cooling after 1.5 minutes/mm of insulation.
(5) tempering:
The paper cutting blade of step (4) is heated to 548 ℃, is incubated 3 hours, tempering 2 times.
The experiment of hardness result of the semi-high speed steel shear-steel of the present embodiment is as shown in table 7, and after 548 ℃ of tempering, its hardness is HRC65.7.
The experiment of hardness value of table 7 embodiment 5 semi-high speed steel shear-steels
In addition, adopt technical scheme production wood working of the present invention to indulge slicing blade, its dimensions is 1550mm * 185mm * 20.5mm, soldering quenching temperature is 1170 ℃, tempering temperature is 550 ℃, tempered-hardness HRC is 64.3, and the vertical slicing Sharpening a knife blade of this wood working 1 time can slicing 4～5 hours, and 1 slicing of alloy-steel blade sharpening 2～3 hours.
The applicable cases of embodiment 1 ~ 5 all shows, adopt semi-high speed steel braze wilding prepared by semi-high speed steel shear-steel of the present invention to inlay steel paper cutting blade than former like product high life, and hardness is high.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, each manufacturing enterprise or company in mechanical bit field, may make various process programs and application, therefore all employings shear-steel composition of the present invention is manufactured edge steel or all steel mechanical bit, and other tool and mould product of equivalent technical solutions manufacture also should belong to category of the present invention, all should be that claim limits.
Claims (2)
1. a semi-high speed steel shear-steel, is characterized in that: the chemical element by following weight percentage forms: C:0.56～0.65%, Si:0.40～0.60%, Mn:0.25～0.40%, Cr:6.0～6.8%, W:1.6～2.5%, Mo:4.2～5.2%, V:0.7～0.9%, Nb:0.1～0.2%, one of Co or Ni: 0.3～0.4%, S≤0.02%, P≤0.025%, all the other are Fe; The preparation method of the semi-high speed steel shear-steel being comprised of the chemical element of above-mentioned weight percentage is as follows: (1) produces semi-high speed steel shear-steel: adopt induction furnace or induction furnace+electric slag refusion and smelting semi-high speed steel shear-steel; (2) forging rolling operation: the semi-high speed steel shear-steel that step (1) is smelted carries out forging rolling, and forging rolling temperature is 870 ℃ ~ 1180 ℃; (3) annealing: the semi-high speed steel shear-steel of step (2) forging rolling is heated to 850 ℃ ~ 860 ℃, is incubated furnace cooling after 4 ~ 6 hours.
2. a kind of semi-high speed steel shear-steel according to claim 1, is characterized in that: described semi-high speed steel shear-steel is comprised of the chemical element of following weight percentage: C:0.58～0.62%, Si:0.48～0.52%, Mn:0.28～0.38%, Cr:6.12～6.60%, W:1.82～2.28%, Mo:4.45～4.94%, V:0.76～0.81%, Nb:0.13～0.16%, one of Co or Ni: 0.32～0.38%, S≤0.02%, P≤0.025%, all the other are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210289225.4A CN102766817B (en) | 2012-08-15 | 2012-08-15 | Semi-high speed steel shear steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210289225.4A CN102766817B (en) | 2012-08-15 | 2012-08-15 | Semi-high speed steel shear steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102766817A CN102766817A (en) | 2012-11-07 |
| CN102766817B true CN102766817B (en) | 2014-04-02 |
Family
ID=47094381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210289225.4A Active CN102766817B (en) | 2012-08-15 | 2012-08-15 | Semi-high speed steel shear steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102766817B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104250709B (en) * | 2013-06-28 | 2016-06-08 | 江苏天工工具有限公司 | A kind of high-quality TG42 saw blade high-speed steel |
| CN104126429A (en) * | 2014-06-20 | 2014-11-05 | 张新瑜 | Blade for roadside green belt trimmer |
| CN105908048A (en) * | 2016-05-18 | 2016-08-31 | 太仓市中厚机械有限公司 | Splitting machine blade |
| CN107937810A (en) * | 2017-11-28 | 2018-04-20 | 东台苏明高速钢制品有限公司 | A kind of phosphorus-containing alloy high-speed steel |
| CN107974616A (en) * | 2017-11-28 | 2018-05-01 | 东台苏明高速钢制品有限公司 | A kind of high silicon steel |
| CN107815599A (en) * | 2017-11-29 | 2018-03-20 | 东台苏明高速钢制品有限公司 | A kind of wear-resisting high molybdenum steel |
| CN107974617A (en) * | 2017-11-29 | 2018-05-01 | 东台苏明高速钢制品有限公司 | A kind of carbon containing high-speed steel |
| CN107964628A (en) * | 2017-11-30 | 2018-04-27 | 东台苏明高速钢制品有限公司 | A kind of low-carbon alloy high-speed steel |
| CN107937821A (en) * | 2017-11-30 | 2018-04-20 | 东台苏明高速钢制品有限公司 | A kind of wear-resisting high-vandium steel |
| CN107937822A (en) * | 2017-11-30 | 2018-04-20 | 东台苏明高速钢制品有限公司 | A kind of high chrome |
| CN107964629A (en) * | 2017-11-30 | 2018-04-27 | 东台苏明高速钢制品有限公司 | A kind of high-strength abrasion-proof high-speed steel |
| CN107881418A (en) * | 2017-11-30 | 2018-04-06 | 东台苏明高速钢制品有限公司 | A kind of high-speed steel |
| CN108130478A (en) * | 2017-12-22 | 2018-06-08 | 安徽嘉龙锋钢刀具有限公司 | A kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb |
| CN107971062A (en) * | 2017-12-29 | 2018-05-01 | 宣城市安工大工业技术研究院有限公司 | A kind of multifunctional solution broken stone quartering hammer and its manufacture 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540023A (en) * | 2003-04-09 | 2004-10-27 | ������������ʽ���� | High speed tool steel and its mfg. method |
-
2012
- 2012-08-15 CN CN201210289225.4A patent/CN102766817B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540023A (en) * | 2003-04-09 | 2004-10-27 | ������������ʽ���� | High speed tool steel and its mfg. method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102766817A (en) | 2012-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102766817B (en) | Semi-high speed steel shear steel | |
| CN102776446B (en) | Semi-high speed steel copper soldering inlaid steel cutting blade and manufacturing method thereof | |
| CN105821279A (en) | High-strength diamond saw blade | |
| CN101250669A (en) | Low-cobalt low alloy high-speed tool steel | |
| CN101250668A (en) | Hot work die steel | |
| CN102505095A (en) | High-speed tool steel for drill bit | |
| CN102586700A (en) | High alloy tube piercing plug material and manufacturing method and surface processing method thereof | |
| CN114032464B (en) | High-performance shearing blade for wide and thick plates and manufacturing method thereof | |
| CN102644027A (en) | Fixed-length shear blade and manufacturing method thereof | |
| CN101962731B (en) | High-strength easy-cutting processing gray pig iron | |
| CN102796958B (en) | Alloy designed steel mechanical blade for preventing network carbide on CrWMn steel from being separated out | |
| CN100469936C (en) | High-performance low-alloy niobium-contained high-speed steel | |
| CN104250709A (en) | High quality TG42 saw blade high speed steel | |
| CN101962738B (en) | Superfine carbide high-alloy tool steel shear-steel splicing mechanical blade | |
| CN108130478A (en) | A kind of Cr-W-Mo-V high alloy tool steels edge steel mechanical bit containing micro Nb | |
| CN104195440A (en) | Low-cost high-speed tool steel for cutting drill bit and preparation process of low-cost high-speed tool steel | |
| CN101250667A (en) | General cold work tool steel | |
| CN114427091B (en) | High-wear-resistance die steel product for hot stamping and additive manufacturing process thereof | |
| CN104131231B (en) | A kind of rocker arm of coal mining machine low-carbon microalloyed cast steel and its preparation method | |
| CN103589956A (en) | Low-cobalt superhard high-speed tool steel for cutting drill bit and preparation technology thereof | |
| CN108570626A (en) | Cut drill wear-resisting no cobalt high speed steel and its preparation process | |
| CN107937810A (en) | A kind of phosphorus-containing alloy high-speed steel | |
| WO2009082328A1 (en) | High speed steel | |
| CN107974617A (en) | A kind of carbon containing high-speed steel | |
| CN101020988A (en) | Antiwear steel and its making process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |