CN106916922B - A kind of quenched new techniques of temper of high-speed steel - Google Patents
A kind of quenched new techniques of temper of high-speed steel Download PDFInfo
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- CN106916922B CN106916922B CN201710223238.4A CN201710223238A CN106916922B CN 106916922 B CN106916922 B CN 106916922B CN 201710223238 A CN201710223238 A CN 201710223238A CN 106916922 B CN106916922 B CN 106916922B
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 229910000997 High-speed steel Inorganic materials 0.000 title claims abstract description 21
- 229910001311 M2 high speed steel Inorganic materials 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005496 tempering Methods 0.000 abstract description 40
- 229910000734 martensite Inorganic materials 0.000 abstract description 25
- 230000008569 process Effects 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 229910001563 bainite Inorganic materials 0.000 description 22
- 238000001816 cooling Methods 0.000 description 19
- 229910001566 austenite Inorganic materials 0.000 description 18
- 230000009466 transformation Effects 0.000 description 18
- 230000000717 retained effect Effects 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 6
- 229910017604 nitric acid Inorganic materials 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000005496 eutectics Effects 0.000 description 3
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000000844 transformation Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 208000013201 Stress fracture Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000000641 cold extrusion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- 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
- 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
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
-
- 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
- C21D2211/002—Bainite
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The present patent application belongs to the technical field of heat treatment of ferrous alloy, specifically discloses a kind of quenched new techniques of temper of high-speed steel, includes the following steps：（1）M2 high-speed steel is heated to 1,210 1230 DEG C, makes product austenitizing, 8 12min is kept the temperature, is cooled to below martensite start temperature 5 80 DEG C；（2）It is tempered for the first time：Step（1）After the completion, 250 270 DEG C are heated product to, keeps the temperature 80 100min, then hardening；（3）Second of tempering：After being tempered for the first time, 250 270 DEG C are heated product to again, keep the temperature 80 100min, then hardening；（4）Third time is tempered：After second is tempered, 520 540 DEG C are heated product to, keeps the temperature 80 100min, it is then air-cooled.Using this tempering process converted products, its toughness can be improved while product hardness is not reduced, the service life of product can be made to improve 17 24% or so, and since temperature substantially reduces, energy consumption reduces by 40 46% or so, effectively reduces the production cost of enterprise.
Description
Technical field
The invention belongs to the technical field of heat treatment of ferrous alloy more particularly to a kind of quenched novel backfires of high-speed steel
Technique.
Background technology
High-speed steel is a kind of tool steel with high rigidity, high-wearing feature and high-fire resistance, also known as high-speed tool steel or cutting edge of a knife or a sword
Steel is commonly called as Bai Gang.The processing performance of high-speed steel is good, and intensity and toughness are worked good, thus be mainly used to the complicated thin sword of manufacture and
Impact-resistant metal cutting tool can also manufacture high-temperature bearing and cold extrusion die etc..And M2 high-speed steel is molybdenum high speed steel, by
It is good in its hardness and wearability, it is chiefly used in cutter of the manufacture cutting compared with hard-cutting material.
Fig. 1 show M2 high-speed steel normative heat treatment tempering process curve graphs, as seen from the figure, the tempering of M2 high-speed steel routine
Process characteristic is：Temperature is high, times of tempering is more.M2 high-speed steel is generally in secondary hardness peak temperature or some slightly higher temperature
It is tempered under degree (540-560 DEG C), guarantee obtains high hardness and thermohardening；And it is repeatedly tempered, main purpose is to eliminate
A large amount of retained austenite.In drawing process, alloy carbide is precipitated from retained austenite, makes the alloy content in austenite
It reducing, and martensite point Ms is made to increase, and in tempering cools down, a part of austenite is changed into martensite, and hardness improves,
Referred to as secondary quenching.The retained austenite contained after high-speed steel quenching is about 20-25%, still there is 10% left side after being tempered for the first time
Right retained austenite fails to change, thus needs to carry out second of tempering, so that retained austenite continues to change, and makes for the first time
The martenaging martempering formed during tempering cooling, eliminates internal stress.And the martenaging martempering formed when being and cooling down second of tempering
And eliminate internal stress, then it needs to carry out third time tempering.
Using conventional tempering process produce M2 high-speed steel, although high hardness and thermohardening can be obtained, toughness compared with
Difference easily makes product that brittle fracture occur, and reduces the service life of product；And due to the temperature being tempered three times be held at compared with
In high range, need to consume a large amount of energy, increase the production cost of enterprise.
Theoretically, to improve the performance of product, improve service life, the content that bainite in increase tissue can be used is this
Mode can carry out tempering operation by way of first carrying out a lonneal and then carrying out a high tempering again, need to note
Meaning is must first to carry out lonneal to carry out high tempering again, and reason is：For high-speed steel, high tempering can make big portion
Point Transformation of Retained Austenite is martensite, and there will be no enough retained austenites to bainite transformation during such lonneal
.But this treating method will not be used in existing temper technique, reason is：When carrying out lonneal processing,
The speed of bainite transformation is very slow, and the time of cost is longer, generally requires the shellfish for spending for more than 10 a hours could change needs
The amount of family name's body, the production efficiency of this mode is extremely low, and that pays is disproportionate with harvesting.
Invention content
The purpose of the present invention is providing a kind of quenched new techniques of temper of high-speed steel, using tempering process production
Product can improve its toughness while product hardness is not reduced, and improve the service life of product, and can also reduce enterprise and add
Work cost.
In order to achieve the above object, base case of the invention is：A kind of quenched new techniques of temper of high-speed steel, packet
Include following steps：
(1) M2 high-speed steel is heated to 1210-1230 DEG C, makes product austenitizing, kept the temperature 8-12min, be subsequently cooled to
5-80 DEG C below martensite start temperature；
(2) it is tempered for the first time：After the completion of step (1), 250-270 DEG C is heated product to, keeps the temperature 80-100min, then
Hardening；
(3) it is tempered for second：After being tempered for the first time, 250-270 DEG C is heated product to again, keeps the temperature 80-100min, so
Hardening afterwards；
(4) third time is tempered：After second is tempered, 520-540 DEG C is heated product to, keeps the temperature 80-100min, Ran Houkong
It is cold.
The operation principle of this base case is：M2 high-speed steel is heated to 1210-1230 DEG C, product austenitizing is protected
Warm 8-12min；After product austenitizing, 5-80 DEG C of progress martensite prequenching below martensite start temperature is cooled to, due to M2 at a high speed
The martensite start temperature of steel is 130 DEG C namely is cooled to 50-125 DEG C.Product is cooled to 130 DEG C of martensite start temperature hereinafter, in tissue
Overcooling austenite start to be changed into martensite, the amount that temperature difference is changed into martensite also can be different.When being cooled to 50-125
DEG C when, the Cooling Austenite Transformation of 5-10% can only be allowed to reduce the free energy of isothermy Lower Bainite Transformation for martensite,
Fast transition for isothermy lower bainite below carries out tissue and prepares to prepare with energy.Control the transformation amount of martensite very
It is crucial, it is impossible to excessive Cooling Austenite Transformation be allowed to avoid the bainite for influencing to generate in follow-up drawing process for martensite
Amount reduces the amount that bainite produces.250-270 DEG C is then heated product to, overcooling austenite is waited to turn to bainite transformation
Become after a certain period of time, carry out water cooling at once.After partial martensite changes, 250-270 DEG C is heated product to again, mistake
Cold austenite after a certain period of time, carries out water cooling again to bainite transformation, transformation.Primary conventional high tempering is then carried out,
520-540 DEG C is heated product to, keeps the temperature 80-100min, then air-cooled, it is tempered martensite to make the martensite transfor mation that front changes
Body.
Using water cooling, faster cooling velocity is obtained by water cooling for tempering for the first time, second of tempering, is improved remaining difficult to understand
Nucleation rate from family name's body to martensite transfor mation and inhibit the stabilisation of retained austenite, inhibit the stabilisation of retained austenite can be with
Ensure the bainite transformation amount and rate of transformation of second of tempering.
The advantageous effect of this base case is：
1st, the product produced using common tempering process, it is internal not contain bainite structure generally, and use this tempering
The product of technique productions contains bainite 20-30%, tempered martensite 60-70%, eutectic carbide 4-8%, proeutectoid carbide
4-6%；The line and staff control of a certain amount of bainite and tempered martensite can improve hardness of the toughness of product without influencing product
And red hardness, therefore, the product produced using this tempering process also improves the tough of product while product hardness is not reduced
Property, the performance of product is significantly improved, improves service life.For wood cutter, produced after being tempered using normative heat treatment
The M2 high-speed steel woodworking plane edge service life is about 1800 meters, and uses the new techniques of temper service life that can reach 2000-2100 meters, improves production
The service life of product.
2nd, under normal circumstances, directly carry out lonneal processing, the speed of bainite transformation is very slow, time of cost compared with
It is long, if you need to the bainite for changing 30%, it usually needs a hour more than 10.It is handled by the prequenching of step (1), makes to be less than 5-10%
Overcooling austenite be first changed into martensite, greatly accelerate the rate of transformation of bainite in follow-up tempering step, twice low temperature
Tempering spends 3-3.5 hour in total, shortens the time, effectively improves production efficiency.
3rd, a lonneal after keeping the temperature 80-100min, hardening, then carries out a lonneal, heat preservation 80-100min,
Hardening, the effect acquired by such processing keep the temperature 200-300min, then hardening better than a lonneal is only carried out.It is former
Because being：1) transformation can be excited by reheating；2) hardening can promote bainite fast transition.
4th, it using common tempering process, cannot be cooled down by way of hardening after heating, reason has at 2 points：1) high temperature
Tempering is generally using 550-600 DEG C, and temperature is excessively high, and the stress that workpiece is subject to is big, and direct hardening easily makes workpiece be damaged；2)
High tempering can generate a large amount of martensite, and since the specific volume of martensite is big, entire product expands after tempering, carries out at this time
Hardening easily forms crackle.Cool down in a manner that hardening then can be used in this technique, reason generates after being lonneal
More is bainite, and too big variation will not occur for the volume of product after tempering, and what is be subject to during lonneal hardening answers
Power is smaller.Cooling is carried out by the way of hardening to be good, and faster cooling velocity is obtained by water cooling and can be promoted
Into bainite transformation.
5 compared with common tempering process, and the temperature of this tempering process is below the temperature of common tempering process,
And preceding temperature twice is only the half of common temperature, effectively reduces the consumption of the energy.According to calculating, using this time
Ignition technique energy consumption can reduce 40-46%, greatly reduce the production cost of enterprise.
Scheme two：As the preferred of basic scheme, in the step (2), 260 DEG C are heated product to, keeps the temperature 90min,
Then hardening.It according to known to long-term knowhow, is tempered for the first time, temperature is controlled at 260 DEG C, is then kept the temperature
90min, obtained properties of product are best.
Scheme three：As the preferred of basic scheme, in the step (3), 260 DEG C are heated product to, keeps the temperature 90min,
Then hardening.According to long-term knowhow, second of tempering, temperature controls at 260 DEG C, then keeps the temperature 90min, obtain
Product it is best.
Scheme four：As the preferred of basic scheme, in the step (4), 530 DEG C are heated product to, keeps the temperature 90min,
Then hardening.Third time is tempered, and temperature is controlled at 530 DEG C, then keeps the temperature 90min, the hardness of obtained product, toughness,
The performances such as wearability are relatively preferable.
Scheme four：As the preferred of basic scheme, after the completion of step (4), 600-650 DEG C is heated product to again, so
After be quickly cooled down, product temperature in 5-8min is made to be reduced to 35-50 DEG C.After the completion of step (4), original austenite is nearby and micro-
Fracture faces enriched objectionable impurities, particularly fracture faces, the very high concentrations of objectionable impurities cause product easily to generate height
Warm temper brittleness.When product is again heated to 600-650 DEG C, due to atomic thermal motion aggravation and randomly the acceleration spread and
Reduce segregation tendency, and have little time segregation during rapid cooling, avoid generating temper brittleness.
Description of the drawings
Fig. 1 is M2 high-speed steel normative heat treatment tempering process curves；
Fig. 2 is the M2 high-speed steel novel thermal process tempering process curves that the present invention uses；
Fig. 3 is to amplify 500 under the shallow corrosion in 5 seconds of 4% nitric acid alcohol using the M2 high-speed steel of 2 processing step of embodiment production
Organization chart again；
Fig. 4 is the group that the M2 high-speed steel produced using common process amplifies 500 times under the shallow corrosion in 5 seconds of 4% nitric acid alcohol
Knit structure chart；
Fig. 5 is amplified under the deep etch in 10 seconds of 8% nitric acid alcohol using the M2 high-speed steel of 2 processing step of embodiment production
500 times of organization chart；
Fig. 6 is the group that the M2 high-speed steel produced using common process amplifies 500 times under the deep etch in 10 seconds of 8% nitric acid alcohol
Knit structure chart.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail：
Embodiment 1
A kind of quenched new techniques of temper of high-speed steel, includes the following steps：
(1) M2 high-speed steel is heated to 1210 DEG C, makes product austenitizing, kept the temperature 8min, be subsequently cooled to 50 DEG C；
(2) it is tempered for the first time：After the completion of step (1), 250 DEG C are heated product to, keeps the temperature 80min, then hardening, water cooling
10 minutes or so, the temperature of product is made to be down to 20-30 DEG C；
(3) it is tempered for second：After being tempered for the first time, 250 DEG C are heated product to again, keep the temperature 80min, then hardening,
Water cooling 10 minutes or so, makes the temperature of product be down to 20-30 DEG C；
(4) third time is tempered：After second is tempered, 520 DEG C are heated product to, keeps the temperature 80min, it is then air-cooled.
Embodiment 2
A kind of quenched new techniques of temper of high-speed steel, includes the following steps：
(1) M2 high-speed steel is heated to 1220 DEG C, makes product austenitizing, kept the temperature 10min, be subsequently cooled to 80 DEG C；
(2) it is tempered for the first time：After the completion of step (1), 260 DEG C are heated product to, keeps the temperature 90min, then hardening, water cooling
10 minutes or so, the temperature of product is made to be down to 20-30 DEG C；
(3) it is tempered for second：After being tempered for the first time, 260 DEG C are heated product to again, keep the temperature 90min, then hardening,
Water cooling 10 minutes or so, makes the temperature of product be down to 20-30 DEG C；
(4) third time is tempered：After second is tempered, 530 DEG C are heated product to, keeps the temperature 90min, it is then air-cooled.
Embodiment 3
A kind of quenched new techniques of temper of high-speed steel, includes the following steps：
(1) M2 high-speed steel is heated to 1230 DEG C, makes product austenitizing, kept the temperature 12min, be subsequently cooled to 125 DEG C；
(2) it is tempered for the first time：After the completion of step (1), 270 DEG C are heated product to, keeps the temperature 100min, then hardening, water
Cold 10 minutes or so, the temperature of product is made to be down to 20-30 DEG C；
(3) it is tempered for second：After being tempered for the first time, 270 DEG C are heated product to again, keep the temperature 100min, then hardening,
Water cooling 10 minutes or so, makes the temperature of product be down to 20-30 DEG C；
(4) third time is tempered：After second is tempered, 540 DEG C are heated product to, keeps the temperature 100min, it is then air-cooled.
Embodiment 4
A kind of quenched new techniques of temper of high-speed steel, includes the following steps：
(1) M2 high-speed steel is heated to 1230 DEG C, makes product austenitizing, kept the temperature 12min, be subsequently cooled to 125 DEG C；
(2) it is tempered for the first time：After the completion of step (1), 270 DEG C are heated product to, keeps the temperature 100min, then hardening, water
Cold 10 minutes or so, the temperature of product is made to be down to 20-30 DEG C；
(3) it is tempered for second：After being tempered for the first time, 270 DEG C are heated product to again, keep the temperature 100min, then hardening,
Water cooling 10 minutes or so, makes the temperature of product be down to 20-30 DEG C；
(4) third time is tempered：After second is tempered, 540 DEG C are heated product to, keeps the temperature 100min, it is then air-cooled；
(5) it reheats：620 DEG C are heated product to again, is then quickly cooled down, and are reduced to product temperature in 6min
38℃。
Table 1
1 data of table are respectively to be tempered and used the tempering heat treatment technique productions of embodiment 2 using normative heat treatment
Some parameters of M2 high-speed steel woodworking plane edges.
The tempering heat treatment technique using embodiment 2 is can be seen that with being given birth to using normative heat treatment tempering from the data of table 1
The M2 high-speed steel of production is compared, and bending strength, the impact that M2 high-speed steel can also be improved while M2 Hardness of High Speed Steel is not reduced are tough
Property, red hardness and service life.
Analysis chart 3, Fig. 4, Fig. 5 and Fig. 6, practical figure 3 above and Fig. 5 are same styles, and distinctive points are that Fig. 3 is to use
The shallow corrosion of 4% nitric acid alcohol 5 seconds obtains, and Fig. 5 is obtained using the deep etch in 20 seconds of 8% nitric acid alcohol, the group in Fig. 3 and Fig. 5
It is woven to：The a small amount of retained austenites 2% of tempered martensite 60%+ lower bainite 30%+ eutectic carbides 8%+；Fig. 4 and Fig. 6 is same
One style is to be produced using conventional tempering process, is organized as：Tempered martensite 90%+ eutectic carbides 8%+ is a small amount of
Retained austenite 2%.There are 30% lower bainite, the presence of lower bainite using the product tissue of 2 technique productions of embodiment
Improve the comprehensive performance of material.
The scope of protection required by this application should be based on the content of the claims, the specific embodiment in specification
Records is waited to can be used for explaining the content of claim.
Claims (5)
1. a kind of quenched new techniques of temper of high-speed steel, which is characterized in that include the following steps：
(1) M2 high-speed steel is heated to 1210-1230 DEG C, makes product austenitizing, kept the temperature 8-12min, be subsequently cooled to start
5-80 DEG C below family name's body point；
(2) it is tempered for the first time：After the completion of step (1), 250-270 DEG C is heated product to, keeps the temperature 80-100min, then hardening；
(3) it is tempered for second：After being tempered for the first time, 250-270 DEG C is heated product to again, keeps the temperature 80-100min, Ran Houcui
Water；
(4) third time is tempered：After second is tempered, 520-540 DEG C is heated product to, keeps the temperature 80-100min, it is then air-cooled.
A kind of 2. quenched new techniques of temper of high-speed steel as described in claim 1, which is characterized in that the step (2)
In, 260 DEG C are heated product to, keeps the temperature 90min, then hardening.
A kind of 3. quenched new techniques of temper of high-speed steel as described in claim 1, which is characterized in that the step (3)
In, 260 DEG C are heated product to, keeps the temperature 90min, then hardening.
A kind of 4. quenched new techniques of temper of high-speed steel as described in claim 1, which is characterized in that the step (4)
In, 530 DEG C are heated product to, keeps the temperature 90min, it is then air-cooled.
5. a kind of quenched new techniques of temper of high-speed steel as described in claim 1, which is characterized in that step (4) is completed
Afterwards, 600-650 DEG C is heated product to again, is then quickly cooled down, and product temperature in 5-8min is made to be reduced to 35-50 DEG C.
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| CN107794350A (en) * | 2017-10-13 | 2018-03-13 | 重庆派斯克刀具制造股份有限公司 | A kind of H.S.S. production technique |
| CN107962362A (en) * | 2017-11-23 | 2018-04-27 | 重庆派斯克刀具制造股份有限公司 | A kind of method for improving planing tool cutter hub intensity |
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