CN105369191A - Circulatory QPQ treating technology suitable for high-speed steel cutters - Google Patents

Circulatory QPQ treating technology suitable for high-speed steel cutters Download PDF

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Publication number
CN105369191A
CN105369191A CN201510978117.1A CN201510978117A CN105369191A CN 105369191 A CN105369191 A CN 105369191A CN 201510978117 A CN201510978117 A CN 201510978117A CN 105369191 A CN105369191 A CN 105369191A
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CN
China
Prior art keywords
qpq
workpiece
circulation
applicable
treatment process
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Pending
Application number
CN201510978117.1A
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Chinese (zh)
Inventor
唐刚全
张丰琼
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SICHUAN QUANFENG NEW MATERIALS TECHNOLOGY Co Ltd
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SICHUAN QUANFENG NEW MATERIALS TECHNOLOGY Co Ltd
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Priority to CN201510978117.1A priority Critical patent/CN105369191A/en
Publication of CN105369191A publication Critical patent/CN105369191A/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
    • C23C8/58—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions more than one element being applied in more than one step

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

The invention provides a circulatory QPQ treating technology suitable for high-speed steel cutters. The circulatory QPQ treating technology comprises the following steps: 1) cleaning: carrying out electrolytic cleaning for 0.05 to 0.1 s under the action of a water-based cleaning agent, wherein the electric current density is 100 to 150 A/dm<2>; 2) preheating: heating a workpiece in an air furnace for 30 to 60 min at the temperature of 380 to 400 DEG C; 3), nitrocarburizing: placing the preheated workpiece in a 450 to 500 DEG C salt bath for 180 min's treatment; 4), oxidizing and polishing: rinsing oxidized workpiece with clear water, and carrying out polishing; repeating the steps (1 to 4) for three times. The circulatory QPQ treating technology is an improvement of the conventional QPQ technology, and has the advantages that the deepness of an azotized layer can be increased effectively; the azotizing thickness of a white etching layer is reduced; the tenacity of a strengthening layer is improved; the obdurability effect is good.

Description

A kind of circulation QPQ treatment process being applicable to speedy steel cutting-tool
Technical field
The invention belongs to hardware manufacturing industry technical field, be specifically related to a kind of circulation QPQ treatment process being applicable to speedy steel cutting-tool.
Background technology
The ordinary method of cutter highly malleablized process is generally that the morphology and distribution improving carbide realizes by adjustment rapid steel thermal treatment process.Adopt vacuum heat treatment technology, obtain small grains tissue, improve the obdurability of high speed steel M2 Al.Coating technology is also one of effective ways improving cutter highly malleablized performance, utilize PVD and CVD technology, form very thin coating at tool surface, these coatings have high rigidity, good thermotolerance and thermal insulation, add the matrix that internal toughness is higher, make cutter have highly malleablized characteristic.The method cvd nitride carbon-titanium nitride composite membrane on rapid steel adopting DC reaction magnetocontrol sputtering and arc ion plating to combine, significantly improves cutter hardness and wear resisting property, thus makes cutter have outer strong interior tough characteristic.In addition, laser reinforcing technology is also one of major processes of speedy steel cutting-tool highly malleablized process.This technique mainly utilizes that laser energy density is high, rate of heating and speed of cooling fast characteristic, the austenite crystal in rapid steel is made to obtain refinement, the toughness of tool matrix material increases, a large amount of carbide dissolves in austenite simultaneously, carbon in martensite subsequently and alloying element content are increased, thus the hardness of cutter, wear resistance and red hardness are significantly promoted.
QPQ technology is the abbreviation of metallic surface salt bath nitriding technology.QPQ technology is a kind of oxynitriding technology, and its technological process comprises several operations such as preheating, nitrogenize, oxidation, polishing.QPQ technology can be good at promoting cutter ground edge hardness, thus improves the wear resistance of cutter.The workpiece of QPQ process from table and be followed successively by compound layer (strengthening layer), diffusion layer and matrix.Compound layer contains Fe 2-3the ε phase of N, hardness is very high, but toughness is poor; Diffusion layer reduces due to nitrogen quantity, mainly contains Fe 4γ ' the phase of N, toughness is higher and have higher hardness.Therefore compound layer should not be formed with diffusion layer being formed during QPQ technical finesse speedy steel cutting-tool.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of circulation QPQ treatment process being applicable to speedy steel cutting-tool.Traditional Q PQ technology is improved, effectively can improve the degree of depth of nitride layer, reduce nitrogenize bright layer thickness, improve the toughness of strengthening layer, in obdurability, obtain good effect.
In order to realize foregoing invention object, the present invention adopts following technical scheme:
Be applicable to a circulation QPQ treatment process for speedy steel cutting-tool, it is characterized in that: processing step is as follows:
3) clean
Under the effect of aqueous cleaning agent, with 100 ~ 150A/dm 2current density electrolysis cleaning 0.05-0.1s;
1) preheating
At the temperature of 380-400 DEG C, to workpiece heat 30-60min in air furnace;
2) carbonitriding
Workpiece after preheating is placed in the salt bath of 450-500 DEG C, process 180min;
By mass, formula consists of described nitridation salt: urea 30-50%, Na 2cO 34-8%, K 2cO 36-10%, Li 2cO 35-10%, KCNO12-25%, NaCNO8-15%, NaCl5-8%, Na 2s4-8%, K 2s6-10%, LiOH2-5%;
3) oxidation and polishing
By the workpiece clear water rinsing after oxidation, polishing;
Repeat 1)-4) step 3 time.
Preferably, by mass, formula consists of described nitridation salt: urea 30-40%, Na 2cO 34-5%, K 2cO 36-7%, Li 2cO 38-10%, KCNO15-20%, NaCNO8-10%, NaCl5-6%, Na 2s4-5%, K 2s6-8%, LiOH2-3%.
Salt bath of the present invention needs to pass into pressurized air continuously, and air flow is 400 ~ 450L/h, and salt bath appropriateness is seethed.
Preferably, described salt is wanted slowly to add in batches, and disposable add-on too much can because reacting violent and excessive salt.
Oxidation of the present invention refers at 400-450 DEG C, under the effect of saline oxide, be oxidized 15min, thoroughly decomposes the cyanogen root that workpiece brings out from nitriding furnace, eliminates public hazards; Form black oxide film at workpiece surface simultaneously, increase antiseptic power, also have certain benefit to raising wear resistance.
The temperature of electrolytic cleaning of the present invention is 70-90 DEG C, and polar plate spacing is 20mm.
Beneficial effect of the present invention is:
1, the present invention adopts novel nitridation salt, can not only keep certain nitrogen gesture, stablize at a higher temperature, also effectively can improve the thickness of processing layer under the lesser temps state of 420-460 DEG C, improves the corrosion resistance of workpiece.
2, circulation QPQ technique of the present invention thoroughly can decompose the cyanogen root that workpiece brings out from nitriding furnace, eliminates public hazards; Form black oxide film at workpiece surface simultaneously, increase antiseptic power, improve wear resistance; Effectively can improve the degree of depth of nitride layer, reduce nitrogenize bright layer thickness, improve the toughness of strengthening layer, in obdurability, obtain good effect.
Embodiment
Below in conjunction with embodiment, essentiality content of the present invention is described in further detail.
Embodiment 1
Be applicable to a circulation QPQ treatment process for speedy steel cutting-tool, processing step is as follows:
1) clean
Under the effect of aqueous cleaning agent, with 100A/dm 2current density electrolysis cleaning 0.1s;
2) preheating
At the temperature of 380 DEG C, to workpiece heat 60min in air furnace;
3) carbonitriding
Workpiece after preheating is placed in the salt bath of 450 DEG C, process 180min;
By mass, formula consists of the nitridation salt of described salt bath: urea 30%, Na 2cO 34%, K 2cO 36%, Li 2cO 35%, KCNO12%, NaCNO8%, NaCl5%, Na 2s4%, K 2s6%, LiOH2%;
4) oxidation and polishing
By the workpiece clear water rinsing after oxidation, polishing;
Repeat 1)-4) step 3 time;
Embodiment 2
Be applicable to a circulation QPQ treatment process for speedy steel cutting-tool, processing step is as follows:
1) clean
Under the effect of aqueous cleaning agent, with 150A/dm 2current density electrolysis cleaning 0.05s; 2) preheating
At the temperature of 400 DEG C, to workpiece heat 30min in air furnace;
3) carbonitriding
Workpiece after preheating is placed in the salt bath of 500 DEG C, process 180min;
By mass, formula consists of the nitridation salt of described salt bath: urea 50%, Na 2cO 38%, K 2cO 310%, Li 2cO 310%, KCNO25%, NaCNO15%, NaCl8%, Na 2s8%, K 2s10%, LiOH5%;
4) oxidation and polishing
By the workpiece clear water rinsing after oxidation, polishing;
Repeat 1)-4) step 3 time;
Embodiment 3
Be applicable to a circulation QPQ treatment process for speedy steel cutting-tool, processing step is as follows:
1) clean
Under the effect of aqueous cleaning agent, with 120A/dm 2current density electrolysis cleaning 0.07s;
2) preheating
At the temperature of 390 DEG C, to workpiece heat 40min in air furnace;
3) carbonitriding
Workpiece after preheating is placed in the salt bath of 460 DEG C, process 180min;
By mass, formula consists of described nitridation salt: urea 32%, Na 2cO 34%, K 2cO 36.5%, Li 2cO 38.5%, KCNO15%, NaCNO8%, NaCl5.5%, Na 2s4.5%, K 2s6.5%, LiOH2.5%;
4) oxidation and polishing
By the workpiece clear water rinsing after oxidation, polishing;
Repeat 1)-4) step 3 time;
Embodiment 4
Be applicable to a circulation QPQ treatment process for speedy steel cutting-tool, processing step is as follows:
1) clean
Under the effect of aqueous cleaning agent, with 130A/dm 2current density electrolysis cleaning 0.08s;
2) preheating
At the temperature of 395 DEG C, to workpiece heat 50min in air furnace;
3) carbonitriding
Workpiece after preheating is placed in the salt bath of 470 DEG C, process 180min;
By mass, formula consists of described nitridation salt: urea 40%, Na 2cO 35%, K 2cO 37%, Li 2cO 310%, KCNO20%, NaCNO10%, NaCl6%, Na 2s5%, K 2s8%, LiOH3%;
4) oxidation and polishing
By the workpiece clear water rinsing after oxidation, polishing;
Repeat 1)-4) step 3 time;
Embodiment 5
The present embodiment is substantially the same manner as Example 1, on this basis:
Described salt bath needs to pass into pressurized air continuously, and air flow is 400L/h.
Embodiment 6
The present embodiment is substantially the same manner as Example 2, on this basis:
Described salt bath needs to pass into pressurized air continuously, and air flow is 450L/h.
Described salt is wanted slowly to add in batches.
Embodiment 7
The present embodiment is substantially the same manner as Example 3, on this basis:
Described salt bath needs to pass into pressurized air continuously, and air flow is 410L/h.
Described salt is wanted slowly to add in batches.
Described oxidation refers at 400 DEG C, under the effect of saline oxide, be oxidized 15min.
Embodiment 8
The present embodiment is substantially the same manner as Example 4, on this basis:
Described salt bath needs to pass into pressurized air continuously, and air flow is 420L/h.
Described salt is wanted slowly to add in batches.
Described oxidation refers at 450 DEG C, under the effect of saline oxide, be oxidized 15min.
The temperature of described electrolytic cleaning is 70 DEG C, and polar plate spacing is 20mm.
Embodiment 9
The present embodiment is substantially the same manner as Example 4, on this basis:
Described salt bath needs to pass into pressurized air continuously, and air flow is 440L/h.
Described salt is wanted slowly to add in batches.
Described oxidation refers at 410 DEG C, under the effect of saline oxide, be oxidized 15min.
The temperature of described electrolytic cleaning is 90 DEG C, and polar plate spacing is 20mm.
Embodiment 10
The present embodiment is substantially the same manner as Example 4, on this basis:
Described salt bath needs to pass into pressurized air continuously, and air flow is 435L/h.
Described salt is wanted slowly to add in batches.
Described oxidation refers at 420 DEG C, under the effect of saline oxide, be oxidized 15min.
The temperature of described electrolytic cleaning is 80 DEG C, and polar plate spacing is 20mm.

Claims (6)

1. be applicable to a circulation QPQ treatment process for speedy steel cutting-tool, it is characterized in that: processing step is as follows:
1) clean
Under the effect of aqueous cleaning agent, with 100 ~ 150A/dm 2current density electrolysis cleaning 0.05-0.1s;
2) preheating
At the temperature of 380-400 DEG C, to workpiece heat 30-60min in air furnace;
3) carbonitriding
Workpiece after preheating is placed in the salt bath of 450-500 DEG C, process 180min;
By mass, formula consists of described nitridation salt: urea 30-50%, Na 2cO 34-8%, K 2cO 36-10%, Li 2cO 35-10%, KCNO12-25%, NaCNO8-15%, NaCl5-8%, Na 2s4-8%, K 2s6-10%, LiOH2-5%;
4) oxidation and polishing
By the workpiece clear water rinsing after oxidation, polishing;
Repeat 1)-4) step 3 time.
2. a kind of circulation QPQ treatment process being applicable to speedy steel cutting-tool according to claim 1, is characterized in that: by mass, formula consists of described nitridation salt: urea 30-40%, Na 2cO 34-5%, K 2cO 36-7%, Li 2cO 38-10%, KCNO15-20%, NaCNO8-10%, NaCl5-6%, Na 2s4-5%, K 2s6-8%, LiOH2-3%.
3. a kind of circulation QPQ treatment process being applicable to speedy steel cutting-tool according to claim 1, it is characterized in that: described salt bath needs to pass into pressurized air continuously, air flow is 400 ~ 450L/h.
4. a kind of circulation QPQ treatment process being applicable to speedy steel cutting-tool according to claim 1, is characterized in that: described salt is wanted slowly to add in batches.
5. a kind of circulation QPQ treatment process being applicable to speedy steel cutting-tool according to claim 1, is characterized in that: described oxidation refers at 400-450 DEG C, under the effect of saline oxide, is oxidized 15min.
6. a kind of circulation QPQ treatment process being applicable to speedy steel cutting-tool according to claim 1, is characterized in that: the temperature of described electrolytic cleaning is 70-90 DEG C, and polar plate spacing is 20mm.
CN201510978117.1A 2015-12-23 2015-12-23 Circulatory QPQ treating technology suitable for high-speed steel cutters Pending CN105369191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510978117.1A CN105369191A (en) 2015-12-23 2015-12-23 Circulatory QPQ treating technology suitable for high-speed steel cutters

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Application Number Priority Date Filing Date Title
CN201510978117.1A CN105369191A (en) 2015-12-23 2015-12-23 Circulatory QPQ treating technology suitable for high-speed steel cutters

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CN105369191A true CN105369191A (en) 2016-03-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110004284A (en) * 2018-01-05 2019-07-12 成都成量工具集团有限公司 A kind of tool checks the manufacturing method of dedicated file

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110004284A (en) * 2018-01-05 2019-07-12 成都成量工具集团有限公司 A kind of tool checks the manufacturing method of dedicated file

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Application publication date: 20160302

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