CN112695157A - Gear laser quenching method and device capable of obtaining continuous uniform hardened layer - Google Patents
Gear laser quenching method and device capable of obtaining continuous uniform hardened layer Download PDFInfo
- Publication number
- CN112695157A CN112695157A CN202011400095.8A CN202011400095A CN112695157A CN 112695157 A CN112695157 A CN 112695157A CN 202011400095 A CN202011400095 A CN 202011400095A CN 112695157 A CN112695157 A CN 112695157A
- Authority
- CN
- China
- Prior art keywords
- laser
- gear
- tooth
- mode
- power density
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
-
- 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
- C21D1/62—Quenching devices
-
- 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
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- 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
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
Landscapes
- 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)
Abstract
The invention discloses a gear laser quenching method and device capable of obtaining a continuous uniform hardened layer, which can obtain a continuous and uniform quenched hardened layer along a tooth surface and solve the problems of discontinuous quenching area, tempering and softening in a lap joint area and low production efficiency in the conventional method. The method mainly comprises the following steps: 1. acquiring a laser quenching processing mode; 2. selecting a laser; 3. segmenting the gear; 4. the first mode or the second mode is selected for quenching each single tooth of the gear, gas blowing is carried out on a processing area in the process so as to protect a laser light path from being shielded by smoke or water vapor, and water cooling is carried out on the processing area.
Description
Technical Field
The invention relates to the technical field of gear surface hardening, in particular to a gear laser quenching method and device capable of obtaining a continuous uniform hardened layer.
Background
The gear is an important transmission part of various engineering mechanical equipment, requires high mechanical performance, especially improves the surface fatigue resistance and wear resistance, and has important significance for improving the bearing capacity and the service life of the gear.
The laser quenching process is a novel gear surface hardening technology and adopts high energy density (10)3～105W/cm2) The laser beam scans the surface of the workpiece to instantly reach the phase change temperature required by quenching, and the surface after the light spot is removed generates a self-quenching phenomenon due to the huge temperature difference between the surface and the substrate, so that the tooth surface of the quench-hardened layer is obtained. The laser quenching has the advantages of accurately controlling a heat treatment area and small deformation, does not reduce the precision grade of the gear, does not need processes such as gear grinding after treatment, and has shown advantages in the field of gear surface hardening.
However, because the profile of the gear is complex, the existing method adopts single-tooth axial scanning, and has the problems of discontinuous quenching area, tempering and softening in a lap joint area, low production efficiency and the like.
Disclosure of Invention
The invention provides a gear laser quenching method and device capable of obtaining a continuous uniform hardened layer, and aims to solve the problems of discontinuous quenching area, tempering and softening in a lap joint area, low production efficiency and the like in the conventional single-tooth axial scanning mode pointed out in the background art.
The specific technical scheme of the invention is as follows:
the invention provides a gear laser quenching method capable of obtaining a continuous uniform hardened layer, which comprises the following specific steps:
step 1: acquiring a laser quenching processing mode;
the laser quenching processing mode comprises two modes:
the first mode is a scan speed variation mode: setting the scanning speed of the tooth top as 100% of the preset scanning speed, setting the scanning speed of the left tooth root as 20% of the preset scanning speed, gradually increasing the scanning speed of the left meshing surface from the left tooth root to the tooth top, enabling the scanning speed curve of the left meshing surface to be consistent with the profile curve of the left meshing surface, increasing the scanning speed of each position of the right meshing surface by 20-40% on the basis of the scanning speed of the equivalent position of the left meshing surface, and keeping the laser power density unchanged in the mode;
the second mode is a laser power density variation mode: setting the laser power density of a left tooth root to be 100% of the preset laser power density, setting the laser power density of a tooth top to be 20% of the set laser power density, gradually reducing the laser power density of a left meshing surface from the left tooth root to the tooth top, enabling the laser power density curve of the left meshing surface to be consistent with the inverted contour curve of the left meshing surface, reducing the power density of each position of a right meshing tooth surface by 15-35% on the basis of the power density of the equivalent position of the left meshing surface, and keeping the scanning speed unchanged in the mode;
step 2: selecting a laser;
selecting a laser with a rectangular light spot, wherein the long edge of the rectangular light spot is matched with the tooth width of the gear to be quenched;
and step 3: segmenting the gear;
dividing the tooth surface of the single tooth of the gear to be quenched into a plurality of continuous processing sections according to the left tooth root, the left meshing surface, the right tooth root and the tooth top;
and 4, step 4: the first mode or the second mode is selected for quenching each single tooth of the gear, gas blowing is carried out on a processing area in the process so as to protect a laser light path from being shielded by smoke or water vapor, and water cooling is carried out on the processing area.
Further, in step 2, the gas nozzle for gas blowing is positioned directly above the processing region, and the water nozzle for water cooling is provided in the opposite direction to the scanning direction and above the processing region.
Further, above-mentioned water jet and air nozzle set up side by side, and the interval between the two is 1/4 tooth pitch to guarantee that hydroenergy is quick to cool off to the region of laser scanning, can not shelter from the effect of laser again.
Further, in the step 3, the tooth surface of the single tooth is divided into 5 sections, 7 sections or 9 sections according to the further subdivision of the change of the curvature radius of the tooth surface.
Further, in step 1, the long side of the rectangular spot is equal to the width of the gear.
The invention also provides a gear laser quenching device capable of obtaining a continuous uniform hardened layer, which comprises a laser, an air nozzle, a water nozzle and a rotating platform;
the laser spot of the laser is rectangular, and the long side of the rectangular spot is matched with the tooth width of the gear to be quenched;
the air nozzle is arranged right above the processing area;
the water spray nozzle is positioned above the processing area and is arranged in the direction opposite to the scanning advancing direction;
the rotating platform is used for installing the gear to be quenched.
Furthermore, the air nozzle and the water nozzle are both arranged outside the light outlet of the laser through a universal joint pipe.
Further, above-mentioned water jet and air nozzle set up side by side, and the interval between the two is 1/4 tooth pitch to guarantee that hydroenergy is quick to cool off to the region of laser scanning, can not shelter from the effect of laser again.
Further, the long side of the rectangular light spot is equal to the width of the gear.
The invention has the beneficial effects that:
1. according to the structural characteristics of the gear and the distribution characteristics of the laser quenching temperature field, the invention obtains a continuous and uniform quenching hardened layer along the tooth surface by a mode of scanning the whole tooth profile tooth surface at one time and accurately controlling the input laser energy and the cooling speed and area, and solves the problems of discontinuous quenching area, tempering and softening in a lap joint area and low production efficiency of the traditional method.
2. The invention realizes the continuous and uninterrupted quenching processing of the gear in the circumferential direction through two quenching modes, further improves the quenching effect by acquiring the characteristics of consistent scanning speed and tooth profile curve change under the condition of constant power, constant scanning speed and consistent power density change and inverted tooth profile curve change, more importantly, can carry out accurate and reliable laser quenching processing on gears with different shapes and sizes only by determining the tooth profile curve, and greatly improves the working efficiency of quenching when gears with different models are replaced.
3. The quenching device is simple in structure and easy to realize.
Drawings
FIG. 1 is a graph of gear profile curves versus scan speed and laser power density for two modes;
FIG. 2 is a schematic structural view of a quenching apparatus;
FIG. 3 is a schematic sectional view of a single tooth (seven segments in the figure);
FIG. 4 is a schematic diagram of the temperature distribution field of laser quenching;
FIG. 5 is a hardness curve of the gear hardened layer.
The reference numbers are as follows:
1-laser, 2-air nozzle, 3-water nozzle, 4-gear to be quenched, 5-universal joint pipe and 6-light outlet.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a gear laser quenching method capable of obtaining a continuous uniform hardened layer, which comprises the following implementation steps of:
1. according to the simulation of a plurality of gears, the relationship curve between the gear profile curve and the scanning speed and the laser power density under two modes is obtained, as shown in fig. 1:
in the first mode, the laser power is constant, and the scanning speed is changed; the mode is specifically as follows: setting the scanning speed of the tooth top as 100% of the preset scanning speed, setting the scanning speed of the left tooth root as 20% of the preset scanning speed, gradually increasing the scanning speed of the left meshing surface from the left tooth root to the tooth top, enabling the scanning speed curve of the left meshing surface to be consistent with the profile curve of the left meshing surface, increasing the scanning speed of each position of the right meshing surface by 20-40% on the basis of the scanning speed of the equivalent position of the left meshing surface, and keeping the laser power density unchanged in the mode;
in the second mode, the scanning speed is constant, and the laser power is changed; the mode is specifically as follows: setting the laser power density of a left tooth root to be 100% of the preset laser power density, setting the laser power density of a tooth top to be 20% of the set laser power density, gradually reducing the laser power density of a left meshing surface from the left tooth root to the tooth top, enabling the laser power density curve of the left meshing surface to be consistent with the inverted contour curve of the left meshing surface, reducing the power density of each position of a right meshing tooth surface by 15-35% on the basis of the power density of the equivalent position of the left meshing surface, and keeping the scanning speed unchanged in the mode;
2. selecting a laser with a rectangular light spot, wherein the long edge of the rectangular light spot is matched with the tooth width of the gear to be quenched;
3. dividing the tooth surface of the single tooth of the gear to be quenched into a plurality of continuous processing sections according to the left tooth root, the left meshing surface, the right tooth root and the tooth top;
4. the first mode or the second mode is selected to carry out quenching treatment on each single tooth of the gear, gas blowing is carried out on a processing area to protect a laser light path from being shielded by smoke or water vapor in the process, water cooling is carried out on the processing area, one of important conditions of laser quenching is the huge temperature difference between a base body and the quenched area, and therefore the pressure and the flow of an air nozzle and a water nozzle are determined according to the temperature rising condition of the base body in the quenching process.
Based on the above method, the present invention provides a quenching apparatus for carrying out the above method, as shown in fig. 2, the apparatus comprising a laser 1, an air nozzle 2, a water nozzle 3, and a rotary table; the laser spot of the laser 1 is rectangular, and the long side of the rectangular spot is matched with the tooth width of the gear 4 to be quenched; the air nozzle 2 and the water nozzle 3 are both arranged outside the light outlet 6 of the laser 1 through a universal joint pipe 5 and are arranged side by side, and 1/4 of the tooth pitch of the gear to be quenched is arranged between the air nozzle and the water nozzle; wherein, the air nozzle 2 is positioned right above the processing area; the water spray nozzle 3 is positioned above the processing area and is arranged in the opposite direction of the scanning advancing direction; the rotating platform is used for installing the gear 4 to be quenched and providing rotation for the gear 4 to be quenched.
Specific examples of gear quenching using two different modes of the quenching apparatus are provided below.
Example 1
Gear parameters: the involute gear is made of 45 steel, the modulus m is 6, the tooth number z is 20, the tooth width b is 40mm, the pressure angle alpha is 20 degrees, and the reference circle diameter d is 120 mm.
Step 1: a long-strip rectangular light spot laser is selected, a laser beam is horizontally emitted, the long side of the rectangular light spot laser is perpendicular to the ground, the gear is horizontally clamped on the rotating table, and the normal direction of the tooth surface of the gear is perpendicular to the light spot laser.
Step 2: according to the structural characteristics of the gear, the tooth surface of the single tooth is divided into 7 sections, as shown in FIG. 3;
and step 3: quenching treatment is carried out by adopting a first mode, and the specific quenching parameters are as follows: the laser power is constant at 1200W, the preset scanning speed is 9mm/s, the scanning speeds of 1-7 sections are respectively 2mm/s, 3mm/s, 5mm/s, 9mm/s, 6mm/s, 4mm/s and 2mm/s, and the distribution of the laser quenching temperature field is shown in figure 4.
And 4, step 4: and (3) quenching all the teeth along the circumferential direction of the tooth surface according to the process parameters set in the step (3), wherein in the quenching process, a gas nozzle sprays protective gas for protecting a laser beam light path from being shielded by smoke or water vapor to a processing area, a water spray nozzle sprays cooling water to the processing area for cooling the processed area, and the hardness curve of a hardening layer of the gear is shown in figure 5.
Example 2
Gear parameters: the material of the involute gear is 20CrNiMo, the modulus m is 5, the tooth number z is 52, the tooth width b is 40mm, the pressure angle alpha is 20 degrees, and the reference circle diameter d is 260 mm.
Step 1: a long-strip rectangular light spot laser is selected, a laser beam is horizontally emitted, the long side of the rectangular light spot laser is perpendicular to the ground, the gear is horizontally clamped on the rotating table, and the normal direction of the tooth surface of the gear is perpendicular to the light spot laser.
Step 2: according to the structural characteristics of the gear, the tooth surface of the single tooth is divided into 7 sections, as shown in FIG. 3;
and step 3: quenching treatment is carried out by adopting a second mode, and the specific quenching parameters are as follows: the given scanning speed is set to be 10mm/s constantly, the preset laser power is 2700W, and the laser power of 1-7 sections is 2700W, 1800W, 1080W, 600W, 900W, 1350W and 2700W respectively.
And 4, step 4: and (3) quenching all the teeth along the circumferential direction of the tooth surface according to the process parameters set in the step (3), wherein in the quenching process, a gas nozzle sprays protective gas for protecting a laser beam light path from being shielded by smoke or water vapor to a processing area, and a water spray nozzle sprays cooling water to the processing area for cooling the processed area.
Claims (9)
1. A gear laser quenching method capable of obtaining a continuous uniform hardening layer is characterized by comprising the following specific steps:
step 1: acquiring a laser quenching processing mode;
the laser quenching processing mode comprises two modes:
the first mode is a scan speed variation mode: setting the scanning speed of the tooth top as 100% of the preset scanning speed, setting the scanning speed of the left tooth root as 20% of the preset scanning speed, gradually increasing the scanning speed of the left meshing surface from the left tooth root to the tooth top, enabling the scanning speed curve of the left meshing surface to be consistent with the profile curve of the left meshing surface, increasing the scanning speed of each position of the right meshing surface by 20-40% on the basis of the scanning speed of the equivalent position of the left meshing surface, and keeping the laser power density unchanged in the mode;
the second mode is a laser power density variation mode: setting the laser power density of a left tooth root to be 100% of the preset laser power density, setting the laser power density of a tooth top to be 20% of the set laser power density, gradually reducing the laser power density of a left meshing surface from the left tooth root to the tooth top, enabling the laser power density curve of the left meshing surface to be consistent with the inverted contour curve of the left meshing surface, reducing the power density of each position of a right meshing tooth surface by 15-35% on the basis of the power density of the equivalent position of the left meshing surface, and keeping the scanning speed unchanged in the mode;
step 2: selecting a laser;
selecting a laser with a rectangular light spot, wherein the long edge of the rectangular light spot is matched with the tooth width of the gear to be quenched;
and step 3: segmenting the gear;
dividing the tooth surface of the single tooth of the gear to be quenched into a plurality of continuous processing sections according to the left tooth root, the left meshing surface, the right tooth root and the tooth top;
and 4, step 4: the first mode or the second mode is selected for quenching each single tooth of the gear, gas blowing is carried out on a processing area in the process so as to protect a laser light path from being shielded by smoke or water vapor, and water cooling is carried out on the processing area.
2. The method of laser hardening a gear with a continuous uniform hardened layer according to claim 1, wherein: in the step 2, the gas nozzle for gas blowing is positioned right above the processing area, and the water nozzle for water cooling is arranged in the opposite direction of the scanning advancing direction and above the processing area.
3. The method of laser hardening a gear with a continuous uniform hardened layer according to claim 2, wherein: the water spray nozzle and the air spray nozzle are arranged side by side, and the distance between the water spray nozzle and the air spray nozzle is 1/4 tooth pitch.
4. The method of laser hardening a gear with a continuous uniform hardened layer according to claim 1, wherein: in the step 3, the tooth surface of the single tooth is divided into 5 sections, 7 sections or 9 sections.
5. The method of laser hardening a gear with a continuous uniform hardened layer according to claim 1, wherein: in the step 1, the width of the long edge of the rectangular light spot is equal to that of the gear.
6. A gear laser quenching device capable of obtaining a continuous uniform hardening layer is characterized by comprising a laser, an air nozzle, a water nozzle and a rotating platform;
the laser spot of the laser is rectangular, and the long side of the rectangular spot is matched with the tooth width of the gear to be quenched;
the air nozzle is arranged right above the processing area;
the water spray nozzle is positioned above the processing area and is arranged in the direction opposite to the scanning advancing direction;
the rotating platform is provided with a gear to be quenched and used for providing rotation for the gear to be quenched.
7. The laser hardening apparatus for gear capable of obtaining a continuous uniform hardened layer according to claim 6, wherein: and the air nozzle and the water spray nozzle are both arranged outside the light outlet of the laser through a universal joint pipe.
8. The laser hardening apparatus for gear capable of obtaining a continuous uniform hardened layer according to claim 7, wherein: the water spray nozzle and the air spray nozzle are arranged side by side, and the distance between the water spray nozzle and the air spray nozzle is 1/4 tooth pitch.
9. The laser hardening apparatus for gear capable of obtaining a continuous uniform hardened layer according to claim 6, wherein: the long edge of the rectangular light spot is equal to the width of the gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400095.8A CN112695157A (en) | 2020-12-02 | 2020-12-02 | Gear laser quenching method and device capable of obtaining continuous uniform hardened layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400095.8A CN112695157A (en) | 2020-12-02 | 2020-12-02 | Gear laser quenching method and device capable of obtaining continuous uniform hardened layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112695157A true CN112695157A (en) | 2021-04-23 |
Family
ID=75506214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011400095.8A Pending CN112695157A (en) | 2020-12-02 | 2020-12-02 | Gear laser quenching method and device capable of obtaining continuous uniform hardened layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112695157A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116411155A (en) * | 2023-04-13 | 2023-07-11 | 广州泰格激光技术有限公司 | Laser quenching device and water cooling method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58107421A (en) * | 1981-12-18 | 1983-06-27 | Toshiba Corp | Heat-treatment of cylindrical cam |
| JPH0543942A (en) * | 1991-08-12 | 1993-02-23 | Toyota Motor Corp | Laser hardening method |
| JP2002129239A (en) * | 2000-10-30 | 2002-05-09 | Hitachi Constr Mach Co Ltd | Laser beam hardening method and apparatus |
| CN107805705A (en) * | 2017-11-28 | 2018-03-16 | 广东工业大学 | A kind of method and system for strengthening gear part |
| CN108559820A (en) * | 2018-04-19 | 2018-09-21 | 杭州盛镭激光科技有限公司 | The method that laser surface hardening based on generation gear grinding avoids tempering band |
-
2020
- 2020-12-02 CN CN202011400095.8A patent/CN112695157A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58107421A (en) * | 1981-12-18 | 1983-06-27 | Toshiba Corp | Heat-treatment of cylindrical cam |
| JPH0543942A (en) * | 1991-08-12 | 1993-02-23 | Toyota Motor Corp | Laser hardening method |
| JP2002129239A (en) * | 2000-10-30 | 2002-05-09 | Hitachi Constr Mach Co Ltd | Laser beam hardening method and apparatus |
| CN107805705A (en) * | 2017-11-28 | 2018-03-16 | 广东工业大学 | A kind of method and system for strengthening gear part |
| CN108559820A (en) * | 2018-04-19 | 2018-09-21 | 杭州盛镭激光科技有限公司 | The method that laser surface hardening based on generation gear grinding avoids tempering band |
Non-Patent Citations (4)
| Title |
|---|
| 刘颂豪: "《光子学技术与应用 下》", 30 September 2006 * |
| 周建忠等: "齿轮激光淬火工艺及性能研究", 《农业机械学报》 * |
| 杨泽华: "激光淬火技术在大模数齿圈齿面表面强化上的应用", 《金属加工（热加工）》 * |
| 陈继民: "《激光现代制造技术》", 31 October 2007 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116411155A (en) * | 2023-04-13 | 2023-07-11 | 广州泰格激光技术有限公司 | Laser quenching device and water cooling method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1230933A (en) | Method and apparatus for laser gear hardening | |
| US6541733B1 (en) | Laser shock peening integrally bladed rotor blade edges | |
| US9187794B2 (en) | Process and apparatus for hardening the surface layer of components having a complicated shape | |
| JP5589142B2 (en) | Gas turbine compressor blade or turbine blade reshaping method | |
| CN1926250A (en) | Component with internal compressive stress, method for producing said component and device for generating internal compressive stress | |
| CN110899981B (en) | Laser-modified ultra-precision cutting laser-assisted hard and brittle material processing method | |
| CN112695157A (en) | Gear laser quenching method and device capable of obtaining continuous uniform hardened layer | |
| CN109207905B (en) | Method and device for preparing titanium alloy blade water erosion resistant layer in partition mode through laser nitridation based on scanning galvanometer | |
| CN103639592A (en) | Roller out-of-order roughening processing method based on fiber laser | |
| CN103282157B (en) | The Ginding process of diamond surface | |
| CN104120238A (en) | Wheel hardening and tempering heat treatment technology | |
| CN106086777A (en) | 45 steel power transmission shaft Rapid Ion Nitriding methods | |
| CN102808077A (en) | Thin-wall gear ring type part quenching method for keeping accuracy level | |
| CN112430796B (en) | Preparation method of micro-nano textured coating of diamond grinding wheel | |
| CN106119468B (en) | Vacuum automobile pump rotor laser-quenching method | |
| CN111515548B (en) | Method for optimizing laser processing scanning track of micro-curvature radius antenna | |
| CN1392023A (en) | Laser profile repairing process for damaged blade of smoke gas turbine | |
| CN109355462B (en) | Selective laser quenching process and device | |
| CN110722468B (en) | Grinding wheel manufacturing device and method for orderly arranging abrasive particles based on laser trimming | |
| CN107199402A (en) | The method of laser co-induction spheroidal graphite cast-iron component surface in-situ authigenic graphene | |
| CN111286596A (en) | Quenching strengthening process for cutting edge of thin blade | |
| CN111889893A (en) | Ultrashort pulse laser precision machining method for dry gas sealed micron-sized groove | |
| CN114774639B (en) | Laser tempering quenching method | |
| CN110093480A (en) | NC cutting tool blade laser surface intensified technique method | |
| CN110039378B (en) | Tooth profile grinding temperature homogenization macrostructure forming grinding wheel parameter design method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210423 |