CN108359785B - Strengthening and toughening treatment method for W6Mo5Cr4V2 high-speed steel broach - Google Patents
Strengthening and toughening treatment method for W6Mo5Cr4V2 high-speed steel broach Download PDFInfo
- Publication number
- CN108359785B CN108359785B CN201810224097.2A CN201810224097A CN108359785B CN 108359785 B CN108359785 B CN 108359785B CN 201810224097 A CN201810224097 A CN 201810224097A CN 108359785 B CN108359785 B CN 108359785B
- Authority
- CN
- China
- Prior art keywords
- speed steel
- salt bath
- broach
- temperature
- steel broach
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a strengthening and toughening treatment method of a W6Mo5Cr4V2 high-speed steel broach, belonging to the technical field of alloy tool steel heat treatment process, which comprises the specific steps of firstly carrying out graded quenching on the W6Mo5Cr4V2 high-speed steel broach in a salt bath; high-temperature tempering for 2 times; then carrying out salt bath nitrocarburizing treatment at 540-550 ℃ for 20-40 min; finally, performing salt bath oxidation treatment at 350-380 ℃ for 20-30 min, and discharging and cooling to room temperature; and repeating the steps of salt bath nitriding and salt bath oxidizing for multiple times to improve the depth of a diffusion layer. The toughness of the W6Mo5Cr4V2 high-speed steel broach is improved, the depth of a infiltrated layer is obviously increased, the surface hardness of the broach is effectively improved, and the service life of the broach can be prolonged by 2-4 times; in addition, after the broach is used for a period of time, the cutting edge regrinds better than the existing one-time nitriding treatment.
Description
Technical Field
The invention belongs to the technical field of alloy tool steel heat treatment processes, and particularly relates to a strengthening and toughening treatment method for a W6Mo5Cr4V2 high-speed steel broach.
Background
The W6Mo5Cr4V2 high-speed steel is widely used for manufacturing various non-standard broaches such as spline broaches, circular broaches, keyway broaches, polygonal broaches and the like due to high hardness, high wear resistance, good thermal stability and red hardness and moderate price. The modern manufacturing industry puts forward the requirements of high cutting speed, high precision, long service life and good reliability to the high-speed steel cutter, so that domestic and foreign scholars always strive to carry out strengthening and toughening treatment on the high-speed steel cutter, improve the hardness and increase the strength and toughness, thereby prolonging the service life of the high-speed steel cutter and reducing the production cost. The main methods for improving the high-speed steel strengthening and toughening are two types: firstly, adjusting the chemical components of the high-speed steel or improving the heat treatment process to improve the toughness of the high-speed steel. Secondly, strengthening treatment of the surface of the high-speed steel, developing a high-speed steel cutter with hard surface and tough core, such as surface coating technology, surface strengthening treatment by laser or ion beams, surface chemical heat treatment technology of nitriding, vulcanizing, molybdenation, multicomponent co-infiltration and the like.
The Chinese invention patent (publication No. CN 103805890A) discloses a heat treatment process of high-speed steel for a cutting tool, the Chinese invention patent (publication No. CN 101693943A) discloses a heat treatment method of the high-speed steel tool, and the Chinese invention patent (publication No. CN 103849739A) discloses a cryogenic treatment method of the high-speed steel tool, wherein the three methods are all used for changing the size, the form and the distribution of carbides in the high-speed steel by adjusting the chemical components of the W6Mo5Cr4V2 high-speed steel or improving the heat treatment process so as to improve the hardness of the high-speed steel. The key performance indexes of the strength (hardness) and the toughness 2 of the high-speed steel are contradictory, and the improvement of the hardness is usually at the expense of the toughness.
In recent years, the development of coated cutters is rapid, one or more layers of composite coatings are deposited on the surface of the high-speed steel cutter through a physical or chemical method, the hardness and the wear resistance of the cutter can be effectively improved, the cutter has the characteristics of strong outer strength and tough inner strength, and the service life of the high-speed steel cutter can be prolonged by 3-6 times or more. Typical "hard" coating materials are diamond, TiC, TiN, TiCN, Al2O3And TiAlN and the like. The Chinese invention patent (publication No. CN101591780) discloses a preparation method of a wear-resistant coating of a cutting tool, which is characterized in that a plasma diffusion and deposition composite technology is adopted to form an N// TiN/TiC multilayer gradient composite coating on the surface of a high-speed steel cutting tool from inside to outside. The multilayer composite coating reinforced high-speed steel cutter prepared by the method can keep the toughness of the core of the cutter, and simultaneously improve the strength, hardness and wear resistance of the surface of the cutter and prolong the service life of the cutter. However, the existing coating technology cannot well solve the problem of low interface bonding strength between the coating and the substrate, and the coating is easy to peel off. And alsoThe coated cutting tool has poor regrinding property, expensive equipment, strict requirements on pretreatment process and high cost, and is suitable for expensive and precise cutting tools, such as gear cutting tools.
The Chinese invention patent (publication No. CN1594605A) discloses a high-speed steel cutter surface high-current pulse ion beam treatment technology, which adopts high-current pulse ion beam irradiation to carry out high-speed steel cutter surface treatment, and combines with subsequent cryogenic treatment to change the tissue structure of the high-speed steel cutter surface, improve the hardness and the wear resistance of the high-speed steel cutter, thereby improving the service life of the cutter. The method has obvious advantages, but faces the same dilemma with other ion beam surface modification technologies such as laser surface treatment and the like, and industrial production is difficult.
the Chinese invention patent (publication No. CN 1616705A) discloses salt bath soft nitriding treatment of a high-speed steel (W6Mo5Cr4V2) sliding blade (or blade), and the Chinese invention patent (publication No. CN 101871087A) discloses a salt bath formula and a treatment method for salt bath nitriding treatment of a high-speed steel air-conditioning compressor blade, wherein both the salt bath nitriding treatment and the treatment method are carried out on the W6Mo5Cr4V2 high-speed steel, so that the surface hardness and the wear resistance of the high-speed steel are improved, and the service life of the high-speed steel is greatly prolonged. The salt bath soft nitriding treatment technology has low cost, obvious strengthening effect and stable performance, and can also be suitable for large-scale and wide-range general high-speed steel cutters. The high-speed steel surface strengthening treatment technology is used for carrying out subsequent treatment on finished cutters so as to improve the performance and prolong the service life of the finished cutters, has multiple process steps, and is not ideal in the aspects of energy conservation and production cost.
disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention aims to provide a strengthening and toughening treatment method for a W6Mo5Cr4V2 high-speed steel broach, so that the broach has the characteristics of hard surface and tough core, the comprehensive performance of the material is improved, and the energy and production cost are greatly saved.
In order to achieve the purpose, the invention adopts the following technical scheme:
A strengthening and toughening treatment method of a W6Mo5Cr4V2 high-speed steel broach comprises the following steps:
step one, carrying out graded quenching to obtain a quenched high-speed steel broach;
Step two, high-temperature tempering: tempering the quenched high-speed steel broach in a salt bath furnace, then air-cooling to room temperature, and carrying out tempering for 2 times according to the process to obtain the high-temperature tempered high-speed steel broach;
Step three, salt bath nitriding: performing salt bath carbonitriding treatment on the high-speed steel broach subjected to high-temperature tempering;
step four, salt bath oxidation: placing the high-speed steel broach subjected to salt bath nitriding treatment into an oxidation salt bath furnace, discharging and cooling to room temperature, and washing with water to remove surface salt;
step five, polishing: and polishing the surface of the high-speed steel broach to remove the surface loose layer.
And step six, repeating the step three, the step four and the step five for n times (n is more than or equal to 1), and improving the depth of a penetration layer to obtain the high-speed steel broach with hard surface and tough core.
the step quenching in the step one is as follows:
firstly, preheating a high-speed steel broach in an air furnace at 400-550 ℃ for 2-4 h at a low temperature, and then preheating in a salt bath furnace at 850-870 ℃ for 10-20 min at a medium temperature; then heating the steel plate in a high-temperature salt bath furnace to the quenching temperature of 1200-1220 ℃, and keeping the temperature for 10-18 s/mm; then carrying out graded quenching in a salt bath at the temperature of 500-550 ℃ for 10-18 s/mm to obtain a quenched high-speed steel broach;
The temperature of high-temperature tempering in the second step is 560 ℃;
The salt bath nitriding step in the third step is as follows:
1) cleaning: cleaning a high-speed steel broach by using water to remove salt on the surface;
2) Preheating: the preheating temperature is 350-400 ℃, and the time is 20-30 min. The preheating aims at forming a very thin FeO film on the surface of the high-speed steel broach to promote the subsequent nitriding;
3) Nitriding treatment: and immersing the high-speed steel broach into a salt bath furnace at 540-550 ℃ for nitrocarburizing treatment for 20-40 min.
In the third step, CNO in the salt bath furnace is used for nitriding-The concentration is 30-32%.
the salt bath oxidation step in the fourth step is as follows: and (3) placing the high-speed steel broach subjected to the salt bath nitriding treatment into an oxidation salt bath furnace at 350-380 ℃ for 20-30 min.
Has the advantages that: compared with the prior art, the method forms Fe on the surface of the high-speed steel after low-temperature salt bath nitridation and salt bath oxidation treatment3O4the oxidation layer and the diffusion layer with nitrogen and carbon dissolved in alpha-Fe effectively improve the hardness of the surface and simultaneously keep the toughness of the core of the broach; meanwhile, a 560 ℃ high-temperature tempering process is saved, the depth of a infiltrated layer of the high-speed steel broach is obviously increased after salt bath nitriding treatment for several times, the surface hardness of the broach is effectively improved, and the service life of the broach can be prolonged by 2-4 times; in addition, after the broach is used for a period of time, the cutting edge regrinds better than the existing one-time nitriding treatment.
Drawings
FIG. 1 is an XRD pattern of the surface of W6Mo5Cr4V2 high-speed steel;
FIG. 2 is the gradient hardness value of W6Mo5Cr4V2 high-speed steel section.
Detailed Description
The technical solution of the present invention is specifically described below by way of examples and with reference to the accompanying drawings, but the scope of the present invention is not limited to the examples.
A strengthening and toughening treatment method for a W6Mo5Cr4V2 high-speed steel broach comprises the following specific steps:
step one, staged quenching
firstly, preheating a high-speed steel broach in an air furnace at 400-550 ℃ for 2-4 h at a low temperature, and then preheating in a salt bath furnace at 850-870 ℃ for 10-20 min at a medium temperature; then heating the steel plate in a high-temperature salt bath furnace to the quenching temperature of 1200-1220 ℃, and keeping the temperature for 10-18 s/mm; then carrying out graded quenching in a salt bath at the temperature of 500-550 ℃ for 10-18 s/mm to obtain a quenched high-speed steel broach;
Step two, high temperature tempering
Tempering the quenched high-speed steel broach in a 560 ℃ salt bath furnace for 1h, then air-cooling to room temperature, and tempering for 2 times according to the process to obtain the high-temperature tempered high-speed steel broach;
Step three, salt bath nitriding
The salt bath carbonitriding treatment is carried out on the high-speed steel broach after high-temperature tempering, and the method comprises the following steps:
1) Cleaning: cleaning a high-speed steel broach by using water to remove salt on the surface;
2) Preheating: the preheating temperature is 350-400 ℃, and the time is 20-30 min. The preheating aims at forming a very thin FeO film on the surface of the high-speed steel broach to promote the subsequent nitriding;
3) Nitriding treatment: and immersing the broach into a salt bath furnace at 540-550 ℃ for nitrocarburizing treatment for 20-40 min. CNO in salt bath furnaces-The concentration is controlled to be about 30-32%.
Step four, salt bath oxidation
And (3) putting the broach subjected to the salt bath nitriding treatment into an oxidation salt bath furnace at 350-380 ℃ for 20-30 min, discharging and cooling to room temperature. And (5) washing with water for 5-10 min to remove the salt on the surface.
Step five, polishing
And polishing the surface of the high-speed steel broach to remove the surface loose layer.
And step six, repeating the step three, the step four and the step five for n times (n is more than or equal to 1), and improving the depth of a penetration layer to obtain the high-speed steel broach with hard surface and tough core.
Example 1
the strengthening and toughening treatment method of the W6Mo5Cr4V2 high-speed steel spline broach with the size of phi 30 multiplied by 900mm comprises the following steps:
Step one, staged quenching: preheating a high-speed steel broach in an air furnace at 500 ℃ for 2 h; preheating for 10min at the medium temperature in a salt bath furnace at 870 ℃; heating to 1220 deg.C in high temperature salt bath furnace, and holding for 5 min; then, the steel plate is subjected to graded quenching in a salt bath at the temperature of 550 ℃ for 5 min.
step two, high-temperature tempering: and (3) tempering the quenched high-speed steel broach in a 560 ℃ salt bath furnace for 1h, then air-cooling to room temperature, and tempering for 2 times according to the process.
step three, salt bath nitriding: and D, performing salt bath carbonitriding treatment on the high-speed steel broach obtained by the second treatment, wherein the method comprises the following steps: (1) cleaning: will be high speedcleaning the steel broach by water to remove salt on the surface; (2) preheating: preheating at 400 deg.C for 20 min; (3) nitriding treatment: immersing the broach in a 540 deg.C salt bath furnace for 40min for nitrocarburizing treatment. CNO in salt bath-The concentration is controlled to be about 32%.
Step four, salt bath oxidation: and (3) putting the broach subjected to the salt bath nitriding treatment into an oxidizing salt bath furnace at 350 ℃ for 30min, discharging and cooling to room temperature. Washing with water for 5min to remove surface salt.
Step five, polishing: and polishing the surface of the broach to remove the surface loose layer.
and step six, repeating the step three, the step four and the step five for 1 time.
Example 2
the strengthening and toughening treatment method of the W6Mo5Cr4V2 high-speed steel spline broach with the size of phi 30 multiplied by 900mm comprises the following steps:
The method comprises the following steps: step quenching: preheating a high-speed steel broach in an air furnace at 500 ℃ for 2 h; preheating for 10min at the medium temperature in a salt bath furnace at 870 ℃; heating to 1220 deg.C in high temperature salt bath furnace, and holding for 5 min; then, the steel plate is subjected to graded quenching in a salt bath at the temperature of 550 ℃ for 5 min.
Step two: high-temperature tempering: and (3) tempering the quenched high-speed steel broach in a 560 ℃ salt bath furnace for 1h, then air-cooling to room temperature, and tempering for 2 times according to the process.
Step three: salt bath nitriding: and D, performing salt bath carbonitriding treatment on the high-speed steel broach obtained by the second treatment, wherein the method comprises the following steps: (1) cleaning: cleaning a high-speed steel broach by using water to remove salt on the surface; (2) preheating: preheating at 400 deg.C for 20 min; (3) nitriding treatment: immersing the broach in a 540 deg.C salt bath furnace for nitrocarburizing treatment for 20 min. CNO in salt bath-the concentration is controlled to be about 32%.
Step four: salt bath oxidation: and (3) putting the broach subjected to the salt bath nitriding treatment into an oxidizing salt bath furnace at 350 ℃ for 30min, discharging and cooling to room temperature. Washing with water for 5min to remove surface salt.
Step five: polishing: and polishing the surface of the broach to remove the surface loose layer.
And step six, repeating the steps three, four and five to carry out surface strengthening and toughening treatment for 2 times, and improving the depth of a penetrated layer.
Example 3
The strengthening and toughening treatment method of the W6Mo5Cr4V2 high-speed steel spline broach with the size of phi 30 multiplied by 900mm comprises the following steps:
the method comprises the following steps: step quenching: preheating a high-speed steel broach in an air furnace at 500 ℃ for 2 h; preheating for 10min at the medium temperature in a salt bath furnace at 870 ℃; heating to 1220 deg.C in high temperature salt bath furnace, and holding for 5 min; then, the steel plate is subjected to graded quenching in a salt bath at the temperature of 550 ℃ for 5 min.
Step two: high-temperature tempering: and (3) tempering the quenched high-speed steel broach in a 560 ℃ salt bath furnace for 1h, then air-cooling to room temperature, and tempering for 2 times according to the process.
Step three: salt bath nitriding: and D, performing salt bath carbonitriding treatment on the high-speed steel broach obtained by the second treatment, wherein the method comprises the following steps: (1) cleaning: cleaning a high-speed steel broach by using water to remove salt on the surface; (2) preheating: preheating at 400 deg.C for 20 min; (3) nitriding treatment: immersing the broach in a salt bath furnace at 550 ℃ for nitrocarburizing treatment for 20 min. CNO in salt bath-The concentration is controlled to be about 32%.
Step four: salt bath oxidation: and (3) putting the broach subjected to the salt bath nitriding treatment into an oxidizing salt bath furnace at 350 ℃ for 20min, discharging and cooling to room temperature. Washing with water for 5min to remove surface salt.
step five: polishing: and polishing the surface of the broach to remove the surface loose layer.
Step six: and repeating the third, fourth and fifth steps to carry out surface strengthening and toughening treatment for 2 times, so as to improve the depth of a penetrated layer.
Example 4
the strengthening and toughening treatment method of the W6Mo5Cr4V2 high-speed steel spline broach with the size of phi 30 multiplied by 900mm comprises the following steps:
Step one, staged quenching: preheating a high-speed steel broach in an air furnace at 500 ℃ for 2 h; preheating for 10min at the medium temperature in a salt bath furnace at 870 ℃; heating to 1220 deg.C in high temperature salt bath furnace, and holding for 5 min; then, the steel plate is subjected to graded quenching in a salt bath at the temperature of 550 ℃ for 5 min.
step two, high-temperature tempering: and (3) tempering the quenched high-speed steel broach in a 560 ℃ salt bath furnace for 1h, then air-cooling to room temperature, and tempering for 2 times according to the process.
step three, salt bath nitriding: and D, performing salt bath carbonitriding treatment on the high-speed steel broach obtained by the second treatment, wherein the method comprises the following steps: (1) cleaning: cleaning a high-speed steel broach by using water to remove salt on the surface; (2) preheating: preheating at 400 deg.C for 20 min; (3) nitriding treatment: immersing the broach in a 540 deg.C salt bath furnace for 25min for nitrocarburizing treatment. CNO in salt bath-The concentration is controlled to be about 32%.
Step four, salt bath oxidation: and (3) putting the broach subjected to the salt bath nitriding treatment into an oxidizing salt bath furnace at 380 ℃ for 20min, discharging and cooling to room temperature. Washing with water for 5min to remove surface salt.
Step five, polishing: and polishing the surface of the broach to remove the surface loose layer.
And step six, repeating the step three, the step four and the step five for 2 times.
Experimental example 4 XRD pattern analysis of surface-strengthened W6Mo5Cr4V2 high-speed steel
The phase composition analysis of the surface-strengthened W6Mo5Cr4V2 high-speed steel surfaces provided in examples 1-3 is shown in FIG. 1. Research shows that after low-temperature salt bath nitriding and salt bath oxidizing treatment, Fe is formed on the surface of the high-speed steel3O4The oxide layer and the diffusion layer of nitrogen and carbon dissolved in alpha-Fe have no compound layer, thus effectively improving the hardness of the surface and simultaneously maintaining the toughness of the core part of the broach.
Experimental example 5 Cross-sectional gradient hardness test of surface-strengthened W6Mo5Cr4V2 high-speed Steel
The gradient hardness test of the W6Mo5Cr4V2 high-speed steel section was carried out by a microhardness tester (HVS-1000), and the results are shown in FIG. 2. Experiments prove that the surface hardness of the high-speed steel is obviously improved due to the penetration of C, N atoms into the high-speed steel matrix, the hardness from the surface to the inside is in gradient change, and the hardness is gradually reduced to the hardness (950 Hv) of the high-speed steel matrix0.1left and right). Wherein the gradient hardness value of the embodiment 2 is the highest, and the surface hardness reaches 1420Hv0.1The depth of the penetrated layer is more than 70 μm.
in conclusion, according to the strengthening and toughening treatment method of the W6Mo5Cr4V2 high-speed steel broach, provided by the invention, the high-speed steel broach is subjected to salt bath nitriding treatment for several times, the depth of a carburized layer is obviously increased, the surface hardness of the broach is effectively improved, and the toughness of the core part of the broach is kept unchanged.
Claims (5)
1. A strengthening and toughening treatment method for a W6Mo5Cr4V2 high-speed steel broach is characterized by comprising the following steps:
Step one, carrying out graded quenching to obtain a quenched high-speed steel broach;
step two, high-temperature tempering: tempering the quenched high-speed steel broach in a salt bath furnace, then air-cooling to room temperature, and carrying out tempering for 2 times according to the process to obtain the high-temperature tempered high-speed steel broach;
Step three, salt bath nitriding: performing salt bath carbonitriding treatment on the high-speed steel broach subjected to high-temperature tempering;
Step four, salt bath oxidation: placing the high-speed steel broach subjected to salt bath nitriding treatment into an oxidation salt bath furnace, discharging and cooling to room temperature, and washing with water to remove surface salt;
step five, polishing: polishing the surface of the high-speed steel broach obtained in the step four, and removing a surface loose layer;
Sixthly, repeating the third, fourth and fifth steps for n times, wherein n is more than or equal to 1, and increasing the depth of a infiltrated layer to obtain a high-speed steel broach with hard surface and tough core; in the third step, the salt bath nitriding step is as follows:
1) Cleaning: cleaning a high-speed steel broach by using water to remove salt on the surface;
2) preheating: the preheating temperature is 350-400 ℃, the time is 20-30 min, and the preheating aims at forming a very thin FeO film on the surface of the high-speed steel broach and promoting the subsequent nitriding;
3) Nitriding treatment: and immersing the high-speed steel broach into a salt bath furnace at 540-550 ℃ for nitrocarburizing treatment for 20-40 min.
2. The strengthening and toughening treatment method of the W6Mo5Cr4V2 high-speed steel broach according to claim 1, characterized in that: in the step one, the step quenching is to preheat the high-speed steel broach in an air furnace at 400-550 ℃ for 2-4 h at a low temperature, and then preheat in a salt bath furnace at 850-870 ℃ for 10-20 min at a medium temperature; then heating the steel plate in a high-temperature salt bath furnace to the quenching temperature of 1200-1220 ℃, and keeping the temperature for 10-18 s/mm; and then carrying out graded quenching in a salt bath at the temperature of 500-550 ℃ for 10-18 s/mm to obtain the quenched high-speed steel broach.
3. The strengthening and toughening treatment method of the W6Mo5Cr4V2 high-speed steel broach according to claim 1, characterized in that: CNO in the salt bath furnace-the concentration is 30-32%.
4. the strengthening and toughening treatment method of the W6Mo5Cr4V2 high-speed steel broach according to claim 1, characterized in that: and in the fourth step, the high-speed steel broach subjected to the salt bath nitriding treatment is placed in an oxidizing salt bath furnace at the temperature of 380-400 ℃ for 20-30 min.
5. The strengthening and toughening treatment method of the W6Mo5Cr4V2 high-speed steel broach according to claim 1, characterized in that: in the sixth step, the third, fourth and fifth steps are repeated for 2 times, so that the depth of the penetrated layer is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810224097.2A CN108359785B (en) | 2018-03-19 | 2018-03-19 | Strengthening and toughening treatment method for W6Mo5Cr4V2 high-speed steel broach |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810224097.2A CN108359785B (en) | 2018-03-19 | 2018-03-19 | Strengthening and toughening treatment method for W6Mo5Cr4V2 high-speed steel broach |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108359785A CN108359785A (en) | 2018-08-03 |
| CN108359785B true CN108359785B (en) | 2019-12-17 |
Family
ID=63000783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810224097.2A Active CN108359785B (en) | 2018-03-19 | 2018-03-19 | Strengthening and toughening treatment method for W6Mo5Cr4V2 high-speed steel broach |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108359785B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109402351A (en) * | 2018-10-15 | 2019-03-01 | 东莞理工学院 | A kind of metal works processing method |
| CN109295288A (en) * | 2018-10-15 | 2019-02-01 | 东莞理工学院 | A kind of metal works hydrodynamics technique |
| CN109825689B (en) * | 2019-03-11 | 2020-06-02 | 湖北汽车工业学院 | Method for preparing high-solid-solubility ultra-fine grain high-speed steel by using electric pulse |
| CN111660145A (en) * | 2020-06-03 | 2020-09-15 | 山东理工大学 | Tool processing method for reducing metal processing cost |
| CN111910053A (en) * | 2020-07-01 | 2020-11-10 | 南京百泽机械有限公司 | Heat treatment process for cutting die assembly |
| CN112430712A (en) * | 2020-11-24 | 2021-03-02 | 南京科亚化工成套装备有限公司 | Heat treatment process for high-speed steel threaded element |
| CN115491632A (en) * | 2022-09-29 | 2022-12-20 | 国家能源菏泽发电有限公司 | Surface treatment technology for gas shock wave soot blower nozzle buffer leaf spring |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338529A (en) * | 2000-08-14 | 2002-03-06 | 斯蒂芬流体力学与摩擦研究中心 | Surface treatment of mechanical parts with wear and corrosion simultaneously |
| CN101693943A (en) * | 2009-10-13 | 2010-04-14 | 上海电机学院 | High speed steel tool heat treatment method |
| CN102808075A (en) * | 2012-09-13 | 2012-12-05 | 沈阳飞机工业（集团）有限公司 | Heat treatment technology method for high-speed steel-disc milling cutter |
| CN103276344A (en) * | 2012-12-28 | 2013-09-04 | 郭伟 | Deep QPQ salt bath composite strengthening and modifying high and new technology |
| CN105525230A (en) * | 2014-10-23 | 2016-04-27 | 无锡桥阳机械制造有限公司 | Method for manufacturing cutting tools from high-speed W18Cr4Nb material |
| CN105586524A (en) * | 2014-10-23 | 2016-05-18 | 无锡华冶钢铁有限公司 | Manufacturing and machining technique for tool made from material with Al2O3 as main component |
| CN105755257A (en) * | 2014-12-13 | 2016-07-13 | 重庆泰达模具制造有限公司 | Broaching tool heat treatment technology |
| CN107109617A (en) * | 2014-12-23 | 2017-08-29 | H.E.F.公司 | Pass through nitriding or the surface treatment method of the steel element of carbo-nitriding, oxidation and then dipping |
-
2018
- 2018-03-19 CN CN201810224097.2A patent/CN108359785B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338529A (en) * | 2000-08-14 | 2002-03-06 | 斯蒂芬流体力学与摩擦研究中心 | Surface treatment of mechanical parts with wear and corrosion simultaneously |
| CN101693943A (en) * | 2009-10-13 | 2010-04-14 | 上海电机学院 | High speed steel tool heat treatment method |
| CN102808075A (en) * | 2012-09-13 | 2012-12-05 | 沈阳飞机工业（集团）有限公司 | Heat treatment technology method for high-speed steel-disc milling cutter |
| CN103276344A (en) * | 2012-12-28 | 2013-09-04 | 郭伟 | Deep QPQ salt bath composite strengthening and modifying high and new technology |
| CN105525230A (en) * | 2014-10-23 | 2016-04-27 | 无锡桥阳机械制造有限公司 | Method for manufacturing cutting tools from high-speed W18Cr4Nb material |
| CN105586524A (en) * | 2014-10-23 | 2016-05-18 | 无锡华冶钢铁有限公司 | Manufacturing and machining technique for tool made from material with Al2O3 as main component |
| CN105755257A (en) * | 2014-12-13 | 2016-07-13 | 重庆泰达模具制造有限公司 | Broaching tool heat treatment technology |
| CN107109617A (en) * | 2014-12-23 | 2017-08-29 | H.E.F.公司 | Pass through nitriding or the surface treatment method of the steel element of carbo-nitriding, oxidation and then dipping |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108359785A (en) | 2018-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108359785B (en) | Strengthening and toughening treatment method for W6Mo5Cr4V2 high-speed steel broach | |
| JP5328545B2 (en) | Steel member having nitrogen compound layer and method for producing the same | |
| CN102877070A (en) | Surface compound treatment method for steel mould | |
| CN107974670A (en) | A kind of process for the processing of tool surface coating | |
| CN110578109A (en) | Vacuum carburizing heat treatment process for 18Cr2Ni4WA material workpiece | |
| CN111962012A (en) | High-temperature carburization slow-cooling quenching tempering heat treatment method for engineering machinery crawler belt pin bush | |
| WO2022121565A1 (en) | High-frequency induction-based local tempering heat treatment method for high-nitrogen stainless bearing steel | |
| CN113774315A (en) | Aviation heavy-load gear and preparation method thereof | |
| CN111485070A (en) | Preparation process of antifriction and wear-resistant gear part | |
| CN111690794A (en) | Preparation method of engineering machinery final transmission gear | |
| CN112323024B (en) | High-strength antioxidant coating and preparation method and application thereof | |
| CA3196428A1 (en) | Carburized workpiece and preparation method therefor | |
| CN109518184B (en) | Hf-BHfN-BHfNC composite coating cutter and preparation method thereof | |
| CN110629170A (en) | Method for improving wear resistance of high-pressure hydraulic pump part | |
| CN108517488B (en) | A kind of alloy material parts surface anticorrosion antiwear composite coating and preparation method thereof | |
| CN101623737B (en) | Stretch forming die obtained by surface processing | |
| CN107354432A (en) | ZrCrCN gradient composite coating cutters and preparation method thereof | |
| CN111519129A (en) | Rotation-driven surface soft nitriding chemical heat treatment strengthening method | |
| CN208562500U (en) | A kind of high-speed steel tool Strengthening and Toughening processing unit | |
| CN109295411A (en) | A kind of automobile transmission gear under Q&P&T technique | |
| CN115283945B (en) | High-hardness synchronizer riveting locking pin and processing method thereof | |
| CN107937913A (en) | A kind of production technology of pallet | |
| Nie et al. | Research and prospects of vacuum heat treatment technology | |
| CN112725721B (en) | Carburizing and quenching process for ultrahigh-hardness gear | |
| CN116676563A (en) | High-hardness Ti-TiN-TiAlN-TiAlCrN multilayer coating and preparation process thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20180803 Assignee: Jiangsu Shenggong Construction Group Co.,Ltd. Assignor: YANCHENG INSTITUTE OF TECHNOLOGY Contract record no.: X2022980029965 Denomination of invention: A method of strengthening and toughening of W6Mo5Cr4V2 high-speed steel broach Granted publication date: 20191217 License type: Common License Record date: 20230105 Application publication date: 20180803 Assignee: Jiangsu Jiujian Construction Engineering Co.,Ltd. Assignor: YANCHENG INSTITUTE OF TECHNOLOGY Contract record no.: X2022980028532 Denomination of invention: A method of strengthening and toughening of W6Mo5Cr4V2 high-speed steel broach Granted publication date: 20191217 License type: Common License Record date: 20221230 Application publication date: 20180803 Assignee: SUNWAVE COMMUNICATIONS Co.,Ltd. Assignor: YANCHENG INSTITUTE OF TECHNOLOGY Contract record no.: X2022980028529 Denomination of invention: A method of strengthening and toughening of W6Mo5Cr4V2 high-speed steel broach Granted publication date: 20191217 License type: Common License Record date: 20221230 |