CN102230151B - A kind of heat treatment process of metal workpiece - Google Patents
A kind of heat treatment process of metal workpiece Download PDFInfo
- Publication number
- CN102230151B CN102230151B CN201110203437.1A CN201110203437A CN102230151B CN 102230151 B CN102230151 B CN 102230151B CN 201110203437 A CN201110203437 A CN 201110203437A CN 102230151 B CN102230151 B CN 102230151B
- Authority
- CN
- China
- Prior art keywords
- minutes
- treatment process
- time
- stage
- carbon
- 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
Abstract
The invention provides a kind of heat treatment process of metal workpiece, first by the preheating under protection gas condition of pending workpiece, then heat up and carry out carbonitriding, finally quenching, tempering, cooling.The heat treated workpiece strength of the present invention is high, and wear resistance is good, through durable test and the test of main physicochemical property, all meets processing requirement.
Description
Technical field
The present invention relates to a kind of heat treatment process of metal workpiece, particularly relate to a kind of thermal treatment process improving workpiece antifatigue spot corrosion wearing and tearing.
Background technology
The general work principle that 125 man styles straddle motorcycle engine is contractd to light by the mixed pressure of mixing air and fuel (normally gasoline) to form blast afterwards in cylinder, drives crankshaft operation to provide power, i.e. the process of conversion of heat into kinetic energy; Then bent axle by primary pinion power again by the different speed ratios of the different gears of main shaft/countershaft, with the slow speed of revolution to high rotating speed by initiatively output gear in transmission of power to countershaft, and then to be operated by chain drive trailing wheel, reach the object of motorcycle walking.It is exactly so the vitals transmitting high rotating speed power as five grades of gears on master/slave shaft transmission main shaft, this gear is transmitting power and is changing in the operational process of speed, existing rolling between the pair of meshing flank of tooth, there is slip again, and also will be pulsed or the effect of alternate flexural stress in tooth root portion, these stress mainly contain three kinds: frictional force, contact stress and stress in bending.
Owing to being on active service under high rotating speed of being everlasting, superpower load, multiple stress state, therefore gear very easily produces fatigue equivalent wearing and tearing, in this field, because the incidence of the engine abnormal noise caused of this fault is higher.So man style straddle car motorcycle engine inspection in have to pass through engine pedestal resistance to comply with the national standard requirements long afterwards just can go on the market as salable product.Especially some 125 man style straddles car when developing, straddle car power high (8.5KW) owing to having than general 125 man styles, the feature of width little (little 1mm) that five grades of general 125 man styles of gear ratio straddle car five grades of wheel teeth, unit load on such gear and stress are very large, this just causes gear more easily to produce durable spot corrosion wearing and tearing, so just occurred that engine pedestal is resistance on stream to occur the problem that fatigue equivalent weares and teares long afterwards.
Summary of the invention
The object of this invention is to provide a kind of heat treatment process of metal workpiece, by improving preheating, oozing by force, spreading and quenching technology, thus improve gear pitting corrosion wearing and tearing.Problem to be solved by this invention is that the deficiency that fatigue equivalent weares and teares easily appears in prior art middle gear.
Heat treatment process of metal workpiece of the present invention, step comprises:
Step 1, by preheating under pending workpiece 770 ± 5 DEG C and protection gas existence condition;
Step 2, is warming up to 870 ± 5 DEG C and carries out carbonitriding, and wherein, oozing by force stage carbon-potential control is 1.15% ~ 1.25%, and diffusion phase carbon-potential control is 1.05% ~ 1.15%; Then be cooled to 830 ± 5 DEG C to be incubated, holding stage terminates carbon-potential control 0.90% ~ 1.05%;
Step 3, quenches under 120 ± 5 DEG C of conditions;
Step 4, carries out tempering under 180 ± 10 DEG C of conditions, cooling.
In the above-mentioned thermal treatment process of the present invention, each flow process required time changes according to different depth of penetration, and the present invention is preferably the following time:
The above-mentioned thermal treatment process of the present invention, in step 1, warm up time is 25 ± 5 minutes.
The above-mentioned thermal treatment process of the present invention, in step 2, oozing by force phases-time is 130 ± 5 minutes; The diffusion phase time is 45 ± 5 minutes; The holding stage time is 30 ± 5 minutes.
Wherein, ooze by force first 30 ± 5 minutes of the stage for equal thermophase, latter 95 ± 5 minutes for formally to ooze the stage by force.
The above-mentioned thermal treatment process of the present invention, in step 3, the quench stage time is 30 ± 5 minutes.
The above-mentioned thermal treatment process of the present invention, in step 4, tempering time is 180 ± 5 minutes.
According to a kind of preferred implementation of thermal treatment process of the present invention, in step 2, nitrogenous source is provided by ammonia, and carbon source is provided by methyl alcohol and propane.
More preferably, described methyl alcohol passed in the preheating initial stage, until stop at the end of holding stage; Described ammonia passes into, until stop when being cooled to holding stage oozing by force the initial stage.
The above-mentioned thermal treatment process of the present invention, wherein, methanol flow is 2 ~ 3.8L/min; And regulate the carbon potential in heat treatment environment by propane.
Contriver also finds, in the above-mentioned thermal treatment process of the present invention, ammonia flow is different, workpiece anti-fatigue intensity is also different, the present invention preferably, is oozing the stage by force, and ammonia flow is 1.5 ~ 3L/min, after diffusion phase and diffusion, temperature-fall period flow is 1.5 ~ 2.5L/min, all the other stages obstructed ammonia.
The above-mentioned thermal treatment process of the present invention, in step 3, drains after having quenched, and the time is 20 ± 5 minutes, and temperature can be normal temperature or room temperature.
Heat treatment process of metal workpiece of the present invention, eliminate 500 DEG C of preoxidation processes in existing thermal treatment process technology, and the pre-heating stage under adding protective atmosphere, and by controlling to ooze by force, spread and the carbon potential of holding stage, thus make the five grades of strengths of gear teeth of the main shaft after process higher, through durable test, occur without spot corrosion situation; Illustrate that heat treating method of the present invention well solves the problem of the durable spot corrosion wearing and tearing of main shaft five grades of gears.Thermal treatment process of the present invention can also be used for the thermal treatment of the workpiece such as other metal gear simultaneously, to improve intensity.
Accompanying drawing explanation
Fig. 1 is heat treatment cycle curve figure of the present invention.
Embodiment
Heat treatment process of metal workpiece of the present invention, step comprises:
Step 1, by preheating under pending workpiece 770 ± 5 DEG C and protection gas existence condition;
Step 2, is warming up to 870 ± 5 DEG C and carries out carbonitriding, and wherein, oozing by force stage carbon-potential control is 1.20 ± 0.05%, and diffusion phase carbon-potential control is 1.10 ± 0.05%; Then be cooled to 830 ± 5 DEG C to be incubated, holding stage carbon-potential control is 0.90% ~ 1.05%;
Step 3,120 ± 5 DEG C of quenchings;
Step 4,180 ± 10 DEG C of tempering, cooling.
The equipment that heat treatment process of metal workpiece equipment used of the present invention can adopt prior art known can be the multipurpose furnace such as business-like well formula multipurpose furnace, controlled atmosphere sealing box type multipurpose furnace, as rich eastern multipurpose furnace.
Be described in detail below by specific embodiment heat treatment process of metal workpiece of the present invention and describe, to make better to understand the present invention, but following embodiment does not limit the scope of the invention.
embodiment 1
Under protective atmosphere, gear is carried out preheating at 770 ± 5 DEG C, warm up time is 25 ± 5 minutes, passes into methyl alcohol while preheating, and methanol flow is 3.8L/min.
With utmost dispatch, temperature is risen to 870 ± 5 DEG C after preheating, pass into ammonia at this temperature, ammonia flow is 2.5L/min.Pass into methane and carbon potential is adjusted to 1.23%, that carries out carbonitriding oozes the stage by force.
Enter diffusion phase after 135 minutes, nitrogen flow is adjusted to 1.5L/min, and carbon potential is adjusted to 1.07%.
After 50 minutes, as early as possible by near for temperature 830 ± 5 DEG C, and be incubated at this temperature, stop passing into of ammonia, carbon potential is adjusted to 0.95% simultaneously.
Be incubated 35 minutes, oil quenchinng, quenching temperature is 120 ± 5 DEG C, and the time is 30 minutes.
Quench complete, carry out tempering process, tempering temperature is 180 ± 10 DEG C, and the time is 180 minutes; Described thermal treatment process is terminated after cooling.
embodiment 2
Under protective atmosphere, gear is carried out preheating at 770 ± 5 DEG C, warm up time is 25 minutes, passes into methyl alcohol while preheating, and methanol flow is 3.8L/min.
With utmost dispatch, temperature is risen to 870 ± 5 DEG C after preheating, pass into ammonia at this temperature, ammonia flow is 2.5L/min.Pass into methane and carbon potential is adjusted to 1.18%, that carries out carbonitriding oozes the stage by force.
Enter diffusion phase after 125 minutes, nitrogen flow is adjusted to 1.5L/min, and carbon potential is adjusted to 1.08%.
After 45 minutes, as early as possible by near for temperature 830 ± 5 DEG C, and be incubated at this temperature, stop passing into of ammonia, carbon potential is adjusted to 1.02% simultaneously.
Be incubated 45 minutes, oil quenchinng, quenching temperature is 120 ± 5 DEG C, and the time is 30 minutes.
Quench complete, carry out tempering process, tempering temperature is 180 ± 10 DEG C, and the time is 180 minutes; Described thermal treatment process is terminated after cooling.
embodiment 3
Under protective atmosphere, gear is carried out preheating at 770 ± 5 DEG C, warm up time is 25 minutes, passes into methyl alcohol while preheating, and methanol flow is 3.8L/min.
With utmost dispatch, temperature is risen to 870 ± 5 DEG C after preheating, make temperature-stable, pass into ammonia at this temperature through one end time (as 35min), ammonia flow is 2.5L/min.Pass into methane and carbon potential is adjusted to 1.20%, that carries out carbonitriding oozes the stage by force.
Enter diffusion phase after 130 minutes, nitrogen flow is adjusted to 1.5L/min, and carbon potential is adjusted to 1.10%.
After 45 minutes, as early as possible by near for temperature 830 ± 5 DEG C, and be incubated at this temperature, stop passing into of ammonia, carbon potential is adjusted to 0.98% simultaneously.
Be incubated 45 minutes, oil quenchinng, quenching temperature is 120 ± 5 DEG C, and the time is 30 minutes.
Quench complete, carry out tempering process, tempering temperature is 180 ± 10 DEG C, and the time is 180 minutes; Described thermal treatment process is terminated after cooling.
The heat treated gear of the above embodiment of the present invention, carries out endurance quality test, and test condition is: fourth gear 140H+ third gear 60H, 7500r/min, acknowledging time: 2011 03 month on 03 14th, 1 on the 03rd.Test result shows, and spot corrosion situation, does not appear in the heat treated gear of the above embodiment of the present invention.
Physico-chemical tests result shows, and the heat treated gear of the above embodiment of the present invention meets processing requirement, and concrete detected result is in table 1.
Table 1, embodiment of the present invention thermal treatment gear metallographic examination result
Be described in detail specific embodiments of the invention above, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and substituting also all among category of the present invention.Therefore, equalization conversion done without departing from the spirit and scope of the invention and amendment, all should contain within the scope of the invention.
Claims (4)
1. a heat treatment process of metal workpiece, is characterized in that, step comprises:
Step 1, by preheating under pending workpiece 770 ± 5 DEG C and protection gas existence condition;
Step 2, is warming up to 870 ± 5 DEG C and carries out carbonitriding, and wherein, oozing by force stage carbon-potential control is 1.20 ± 0.05%, and diffusion phase carbon-potential control is 1.10 ± 0.05%; Then be cooled to 830 ± 5 DEG C to be incubated, holding stage carbon-potential control is 0.90% ~ 1.05%; Wherein, the described phases-time that oozes by force is 130 ± 5 minutes; The described diffusion phase time is 45 ± 5 minutes; The described holding stage time is 30 ± 5 minutes;
Step 3, quenches under 120 ± 5 DEG C of conditions;
Step 4, carries out tempering under 180 ± 10 DEG C of conditions, cooling;
Wherein, in carbonitriding technology described in step 2, nitrogenous source is ammonia, and carbon source is methyl alcohol and propane;
Described methyl alcohol passed in the preheating initial stage, until stop at the end of holding stage; Described ammonia passes into when carbonitriding starts, until stop when being cooled to holding stage;
Oozing the stage by force, ammonia flow is 1.5 ~ 3L/min, and after diffusion phase and diffusion, temperature-fall period flow is 1.5 ~ 2.5L/min, all the other stages obstructed ammonia;
Methanol flow is 2 ~ 3.8L/min; And regulate the carbon potential in heat treatment environment by propane.
2. thermal treatment process according to claim 1, is characterized in that, warm up time described in step 1 is 25 ± 5 minutes.
3. thermal treatment process according to claim 1, is characterized in that, in described step 3, the quench stage time is 30 ± 5 minutes.
4. thermal treatment process according to claim 1, is characterized in that, in described step 4, tempering time is 180 ± 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110203437.1A CN102230151B (en) | 2011-07-20 | 2011-07-20 | A kind of heat treatment process of metal workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110203437.1A CN102230151B (en) | 2011-07-20 | 2011-07-20 | A kind of heat treatment process of metal workpiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102230151A CN102230151A (en) | 2011-11-02 |
| CN102230151B true CN102230151B (en) | 2015-10-21 |
Family
ID=44842754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110203437.1A Active CN102230151B (en) | 2011-07-20 | 2011-07-20 | A kind of heat treatment process of metal workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102230151B (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534465B (en) * | 2012-02-02 | 2013-07-17 | 山东常林机械集团股份有限公司 | Heat treatment process for surface hardening and carbonitriding of hydraulic parts |
| CN110241378A (en) * | 2012-08-21 | 2019-09-17 | Skf公司 | The method and steel member of heat- treated steel component |
| CN104789923A (en) * | 2014-01-20 | 2015-07-22 | 广东柳菱宏通实业有限公司 | Application method of rare earth in pre-oxidation and soft nitriding technology |
| CN103993154A (en) * | 2014-06-09 | 2014-08-20 | 江西航宇热处理有限公司 | Thermal treatment method of alloy steel gear |
| CN104213070B (en) * | 2014-07-30 | 2018-12-11 | 珠海市钧兴机电有限公司 | Sewing machine gear wheel carburization layer control technique |
| CN104831293B (en) * | 2015-05-26 | 2017-06-20 | 重庆银雁科技有限公司 | Screw carburizing quenching process |
| CN104975298A (en) * | 2015-07-10 | 2015-10-14 | 重庆银雁科技有限公司 | Multi-purpose furnace quenching process for bevel gears |
| CN105200201B (en) * | 2015-11-12 | 2017-03-15 | 佳兴紧固件工业（苏州）有限公司 | A kind of carbo-nitriding heat-treating methods for screw |
| CN106435462A (en) * | 2016-07-01 | 2017-02-22 | 兴化东华齿轮有限公司 | Energy-saving composite type thermal treatment process |
| CN107201494A (en) * | 2017-06-20 | 2017-09-26 | 合肥博创机械制造有限公司 | A kind of alloy carburizing steel gear heat treatment technique |
| CN109182958A (en) * | 2018-11-22 | 2019-01-11 | 福泉市发隆钢构有限公司 | A kind of steel structure surface processing method |
| CN109266999A (en) * | 2018-11-23 | 2019-01-25 | 福泉市发隆钢构有限公司 | A kind of steel structure surface processing method |
| CN109504935B (en) * | 2018-12-18 | 2021-03-05 | 上海嘉恒热处理有限公司 | Heat treatment process for thin metal piece |
| CN109487203A (en) * | 2018-12-31 | 2019-03-19 | 安徽银龙泵阀股份有限公司 | Valve plate surface carbo-nitriding processing method |
| CN109778109B (en) * | 2019-03-26 | 2020-12-08 | 成都天马精密机械有限公司 | Method for solving problem of unqualified carbonitriding quality |
| CN110541139B (en) * | 2019-10-18 | 2020-11-10 | 浙江丰安齿轮股份有限公司 | Carburizing and quenching method and carburizing and quenching equipment for internal spline of half axle gear |
| CN114032493A (en) * | 2021-09-28 | 2022-02-11 | 上海热处理厂有限公司 | Method for modifying high hardness of surface of low-carbon alloy steel |
| CN117625917A (en) * | 2023-12-14 | 2024-03-01 | 扬州市海洋环保设备有限公司 | Wind power shell heat treatment device and process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100188A (en) * | 1985-04-01 | 1988-08-10 | 陕西机械学院 | Wet body carburization process in little nitrogen |
| US5702540A (en) * | 1995-03-29 | 1997-12-30 | Jh Corporation | Vacuum carburizing method and device, and carburized products |
| CN101435065A (en) * | 2007-11-15 | 2009-05-20 | 冯俊杰 | Low temperature rare earth catalytic cementation soft nitriding processing technology for high speed steel mould |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009002985A1 (en) * | 2009-05-11 | 2010-11-18 | Robert Bosch Gmbh | Process for carbonitriding |
-
2011
- 2011-07-20 CN CN201110203437.1A patent/CN102230151B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100188A (en) * | 1985-04-01 | 1988-08-10 | 陕西机械学院 | Wet body carburization process in little nitrogen |
| US5702540A (en) * | 1995-03-29 | 1997-12-30 | Jh Corporation | Vacuum carburizing method and device, and carburized products |
| CN101435065A (en) * | 2007-11-15 | 2009-05-20 | 冯俊杰 | Low temperature rare earth catalytic cementation soft nitriding processing technology for high speed steel mould |
Non-Patent Citations (1)
| Title |
|---|
| 汽车离合器用从动盘减振盘气体碳氮共渗工艺探讨;龙顺彬;《科技致富向导》;20110405(第09期);第211-212页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102230151A (en) | 2011-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102230151B (en) | A kind of heat treatment process of metal workpiece | |
| CN104894506B (en) | Automobile gearbox gear heat treatment method | |
| CN103993154A (en) | Thermal treatment method of alloy steel gear | |
| CN103635717B (en) | Drive plate and manufacture method thereof | |
| CN105400944A (en) | Cryogenic heat treatment technology for improving performances of countershaft gear | |
| CN105239034B (en) | The benefit of carburized gears, which is oozed, reprocesses heat treatment method | |
| CN105386044A (en) | Method for solving problem of excessive seepage of 18CrNi4A material narrow-tooth-shaped component tooth crest | |
| CN102691030A (en) | Chemical nitridation catalyst | |
| CN102732821A (en) | Free-cutting steel part and manufacturing method thereof | |
| CN102888580A (en) | Heat treatment technology of hoisting machinery gear | |
| CN204298449U (en) | Increase the soft nitriding furnace system of gas area coverage | |
| CN103643197A (en) | Thermal processing technology of gears for hoisting machinery | |
| CN104233319A (en) | Method for increasing carburizing and quenching hardness of chrome-nickel steel material | |
| ATE380955T1 (en) | METHOD AND SYSTEM FOR REDUCING JERK DURING RANGE SHIFT OF A POWER-SPLIT CVT TRANSMISSION | |
| CN102703668B (en) | Seal head blank production process | |
| BRPI0515433A (en) | sludge treatment of steel mills in stage furnace | |
| CN102392106A (en) | Heat treatment process of 30CrMnSiA alloy constructional steel | |
| BRPI0504417A (en) | process for increasing temperature resistance of steel part | |
| CN108411093A (en) | A kind of heat treatment process reducing transfer-case idle shaft gear shifting quadrant texturing | |
| CN105463366B (en) | The method for carburizing of automobile gearbox park pawl | |
| CN205701730U (en) | Hot removing system | |
| CN204237831U (en) | The equipment of synchronous thermal treatment saw blade | |
| CN104805453A (en) | Variable-speed gear carburizing and quenching hot working method | |
| Korotkov | Plasma quenching of gear and slotted couplings. | |
| CN102888581A (en) | Heat treatment technology of small hoist crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190429 Address after: No. 36, East Guangzhou Road, 215000 Taicang High-tech Industrial Development Zone, Jiangsu Province Patentee after: New Dazhou Honda Motorcycle (Suzhou) Co., Ltd. Address before: 201708 No. 188 Jiasong Middle Road, Huaxin Town, Qingpu District, Shanghai Patentee before: Sundiro Honda Motorcycle Co., Ltd. |