CN1278014A - Heat treatment process for superthin large circular shape medium-high carbon steel workpiece - Google Patents
Heat treatment process for superthin large circular shape medium-high carbon steel workpiece Download PDFInfo
- Publication number
- CN1278014A CN1278014A CN 00119392 CN00119392A CN1278014A CN 1278014 A CN1278014 A CN 1278014A CN 00119392 CN00119392 CN 00119392 CN 00119392 A CN00119392 A CN 00119392A CN 1278014 A CN1278014 A CN 1278014A
- Authority
- CN
- China
- Prior art keywords
- workpiece
- carbon steel
- heat treatment
- circular shape
- high 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.)
- Granted
Links
Images
Abstract
A heat-treatment technology of super-thin large ring-shape medium-and high-carbon steel workpiece is proceeded according to following steps: 1st step, determining the range of workpiece to be treated; 2nd step, heating and insulating the workpiece in salt-bath furnace; 3rd step, graded quenching; 4th step, leveling; 5th step, clamping with gripping device; 6th step, shaping and tempering; 7th step, air cooling; 8th-step, warm water dipping; 9th step, looseiing gripping device. Said invention is simple in technology, the treated workpiece is good in toughness, elasticity and abrasive resistance.
Description
The present invention relates to the thermal treatment process of middle and high carbon steel work-piece, is a kind of superthin large circular shape medium and high carbon steel heat treatment of workpieces technology.
The thermal treatment of middle and high carbon steel, in steel carbonaceous composition the more, the volume change that is taken place during transformation is just big, and austenite is to carry out under lower temperature to martensitic transformation, this just is easy to generate thermal stresses, thereby causes workpiece deformation, cracking and other quenching defects; When thermal stresses greater than steel relevant temperature lower yield strength and during less than breakdown point, just make workpiece produce tension set at that time, when thermal stresses surpasses steel at that time during the breakdown point under the relevant temperature, then workpiece deformation not only also causes the workpiece cracking; Prior heat treatment process exists the disease of covering that distortion is serious, the cracking scrap rate is high when the processing of the middle and high carbon steel work-piece of ultrafine annular; Therefore cause the comprehensive mechanical performance of its product poor, planeness surpasses tolerance, yield rate is low.
Particularly, at embossing saw blade that uses on the sawtooth cotton gin and the stripping suede saw blade that uses on sawtooth linter all is consumable accessory, the product standard of embossing saw blade and stripping suede saw blade is carried out GB GB5674-85, the product thickness of its regulation is 0.95 ± 0.05 millimeter, planeness is 0.5 millimeter, surface rockwell hardness HR45N23.3 to 32.7, but meet the embossing saw blade of above-mentioned GB and shell the suede saw blade in use, generally stipulate in the cotton processing technology rules according to the issue of Chinese supply and marketing cooperation head office: embossing saw blade is whenever worked continuously and was promptly needed in 80 to 120 hours to change and stripping suede saw blade is carrying out two, three road suedes are worked continuously promptly to be needed to change in 24 to 36 hours.
At present, embossing saw blade is produced by U.S. L.M.S company preferably, the said firm only provides semi-finished products after the thermal treatment to Chinese Shandong Cotton ﹠ Flax Machinery Plant, Shandong linen-cotton mechanical workout is 121 types and the supporting use of new 80 type high speed cotton gins of producing for the our factory behind the finished product, this embossing saw blade measured learn: planeness is 0.35 millimeter, and hardness HRC is 32 to 40.
In view of the problem of above-mentioned existence, the object of the present invention is to provide the superthin large circular shape medium and high carbon steel heat treatment of workpieces technology that a kind of comprehensive mechanical performance is good, planeness is good, yield rate is high.
The objective of the invention is to realize by following steps: this superthin large circular shape medium and high carbon steel heat treatment of workpieces technology is carried out according to the following steps:
The first step, handled workpiece scope: material is No. 45 to No. 85 a carbon steel, and thickness of workpiece is less than 1.5 millimeters, and the ratio of the diameter of workpiece and thickness is greater than 300 to 1, and is porose in the middle of the workpiece;
Second step, required workpiece to be processed put into the salt bath furnace 3 to 4 minutes that is warmed to 810 ℃ to 825 ℃;
The 3rd step, the workpiece after will taking out from salt bath furnace are put into the nitrate furnace 30 to 35 seconds that has been warmed to 290 ℃ to 320 ℃ immediately;
The 4th step, the workpiece from nitrate furnace after the taking-up are put into planer immediately and are flattened, and its time is no less than 1 minute, and wherein the pressing plate of planer needs to 100 to 120 ℃ of pre-temperature;
Workpiece clamp after the 5th step, the process leveling;
The 6th step, workpiece and anchor clamps after will clamping are put into the typing tempering stove together, and the time is 4 to 8 hours, and the temperature of the tempering stove of finalizing the design is 400 to 500 ℃;
The 7th step, the workpiece and the anchor clamps that will take out from tempering stove are placed on air, make the temperature of workpiece and anchor clamps drop to 180 to 220 ℃;
The 8th workpiece and the anchor clamps that go on foot, will drop to 180 to 220 ℃ are put into 50 to 80 ℃ warm water, and soak time is no less than 8 hours;
Anchor clamps on the 9th workpiece that goes on foot, will take out from warm water unclamp, and obtain the good workpiece of thermal treatment.
The external diameter of above-mentioned workpiece can be 407.5 millimeters, internal diameter and can be 150 millimeters, thickness and can be 0.93 to 0.97 millimeter.
The external diameter of above-mentioned workpiece can be 321.5 millimeters, internal diameter and can be 40 millimeters, thickness and can be 0.93 to 0.97 millimeter.
Required workpiece to be processed can be put into the salt bath furnace 3 to 4 minutes that is warmed to 810 ℃ to 820 ℃ in above-mentioned second step.
Required workpiece to be processed can be put into the salt bath furnace 3 to 4 minutes that is warmed to 815 ℃ to 825 ℃ in above-mentioned second step.
Workpiece after taking out can be put into immediately the nitrate furnace 30 to 35 seconds that has been warmed to 290 ℃ to 310 ℃ in above-mentioned the 3rd step from salt bath furnace.
Workpiece after taking out can be put into immediately the nitrate furnace 30 to 35 seconds that has been warmed to 310 ℃ to 320 ℃ in above-mentioned the 3rd step from salt bath furnace.
Above-mentioned planer can be hydraulic pressure planer or dead-weight pressing plate apparatus for leveling.
Above-mentioned typing tempering stove can be nitrate furnace or well formula tempering stove or chamber type electric resistance furnace.
Can adopt 100 to 160 t hydraulic press that anchor clamps are compressed back fastening clips bolt in the 5th above-mentioned step clamps workpiece.
Accompanying drawing 1 is thermal treatment process figure of the present invention;
Accompanying drawing 2 is the front view that adopts the embossing saw blade blind plate after the present invention heat-treats,
Accompanying drawing 3 is the side view cutaway drawing of accompanying drawing 2;
Coding in the accompanying drawing is respectively: 1 is the first step, and 2 was second step, and 3 was the 3rd step, and 4 was the 4th step, and 5 was the 5th step, and 6 was the 6th step, and 7 was the 7th step, and 8 was the 8th step.
Below in conjunction with embodiment and accompanying drawing the present invention is further described:
Embodiment 1, this superthin large circular shape medium and high carbon steel heat treatment of workpieces technology is carried out according to the following steps: the first step, handled workpiece scope: material is No. 70 a carbon steel, and the external diameter of workpiece is that 407.5 millimeters, internal diameter are that 150 millimeters, thickness are 0.93 to 0.97 millimeter; Second step, required workpiece to be processed put into the salt bath furnace 3 to 4 minutes that is warmed to 810 ℃ to 820 ℃; The 3rd step, the workpiece after will taking out from salt bath furnace are put into the nitrate furnace 30 to 35 seconds that has been warmed to 310 ℃ to 320 ℃ immediately; The 4th step, the workpiece from nitrate furnace after the taking-up are put into planer immediately and are flattened, and its time is no less than 1 minute, and wherein the pressing plate of planer needs to 100 to 120 ℃ of pre-temperature; Workpiece clamp after the 5th step, the process leveling; The 6th step, workpiece and anchor clamps after will clamping are put into the typing tempering stove together, and the time is 4 hours, and the temperature of typing tempering stove is 410 to 420 ℃, the tempering stove of wherein finalizing the design employing nitrate furnace; The 7th step, the workpiece and the anchor clamps that will take out from tempering stove are placed in the air, make the temperature of workpiece and anchor clamps drop to 180 to 220 ℃; The 8th workpiece and the anchor clamps that go on foot, will drop to 180 to 220 ℃ are put into 50 to 80 ℃ warm water, and soak time is no less than 8 hours; Anchor clamps on the 9th workpiece that goes on foot, will take out from warm water unclamp, and obtain the good workpiece of thermal treatment.The good workpiece of thermal treatment measured obtain: Rockwell hardness HRC is 42 to 44, and planeness is less than 0.20 millimeter, and yield rate is 100%.
Embodiment 9 is with the difference of embodiment 7: the 6th step of embodiment 9 is different, workpiece after it will clamp and anchor clamps are put into the typing tempering stove together, time is 6 hours, and the temperature of typing tempering stove is 425 to 435 ℃, and the tempering stove of wherein finalizing the design adopts chamber type electric resistance furnace; The good workpiece of thermal treatment measured obtain: Rockwell hardness HRC is 40 to 42, and planeness is less than 0.17 millimeter, and yield rate is 100%.
Embodiment 10 is with the difference of embodiment 7: the first step of embodiment 10 is different, and its handled workpiece scope: material is No. 70 a carbon steel, and the external diameter of workpiece is that 321.5 millimeters, internal diameter are that 40 millimeters, thickness are 0.93 to 0.97 millimeter; The good workpiece of thermal treatment measured obtain: Rockwell hardness HRC is 40 to 42, and planeness is less than 0.17 millimeter, and yield rate is 100%.
Embodiment 11 is with the difference of embodiment 10: the 6th step of embodiment 11 is different, workpiece after it will clamp and anchor clamps are put into the typing tempering stove together, time is 5 hours, and the temperature of typing tempering stove is 430 to 440 ℃, and the tempering stove of wherein finalizing the design adopts well formula tempering stove; The good workpiece of thermal treatment measured obtain: Rockwell hardness HRC is 39 to 41, and planeness is less than 0.15 millimeter, and yield rate is 100%.
Embodiment 12 is with the difference of embodiment 10: the 6th step of embodiment 12 is different, workpiece after it will clamp and anchor clamps are put into the typing tempering stove together, time is 6 hours, and the temperature of typing tempering stove is 425 to 435 ℃, and the tempering stove of wherein finalizing the design adopts chamber type electric resistance furnace; The good workpiece of thermal treatment measured obtain: Rockwell hardness HRC is 39 to 41, and planeness is less than 0.16 millimeter, and yield rate is 100%.
Embodiment 13 is with the difference of embodiment 7: the 3rd step of embodiment 13 is different, and the workpiece after it will take out from salt bath furnace is put into the nitrate furnace 30 to 35 seconds that has been warmed to 290 ℃ to 310 ℃ immediately; The good workpiece of thermal treatment measured obtain: Rockwell hardness HRC is 41 to 43, and planeness is less than 0.22 millimeter, 3 plate plane degree is arranged above 0.20 millimeter in 100.
Embodiment 14 is with the difference of embodiment 13: the 6th step of embodiment 14 is different, workpiece after it will clamp and anchor clamps are put into the typing tempering stove together, time is 4 hours, and the temperature of typing tempering stove is 490 to 500 ℃, and the tempering stove of wherein finalizing the design adopts nitrate furnace; The good workpiece of thermal treatment measured obtain: Rockwell hardness HRC is 37 to 38, and planeness is less than 0.20 millimeter, and yield rate is 100%.
Embodiment 15 is with the difference of embodiment 13: the first step of embodiment 15 is different, and its handled workpiece scope: material is No. 55 a carbon steel, and the external diameter of workpiece is that 321.5 millimeters, internal diameter are that 40 millimeters, thickness are 0.93 to 0.97 millimeter; The good workpiece of thermal treatment measured obtain: Rockwell hardness HRC is 39 to 40, and planeness is less than 0.17 millimeter, and yield rate is 100%.
In the present invention: No. 45 to No. 85 carbon steel is the regulation that adopts among the GB GB699-65.
In an embodiment of the present invention, the workpiece among each embodiment is 100; What measurement of hardness used is the HD9-45 type optical surface Rockwell hardometer that Shanghai material-testing machine factory produces, and uses the HR45N scale, is converted into HRC after the mensuration; Planeness is measured and is used 0 grade of flat board, 0 grade of dial gauge of adapted and gauge stand; That nitrate furnace adopts is DM-100-6, and that salt bath furnace adopts is DM-100-8, and that well formula tempering stove adopts is R55-75-6H, and that box tempering stove adopts is RJX-60-9; Can adopt 100 to 160 t hydraulic press that anchor clamps are compressed back fastening clips bolt in the 5th step of the present invention clamps workpiece.
The workpiece good to thermal treatment in the foregoing description carries out folding test: workpiece is cut into long 200 millimeters, wide 20 millimeters rectangular along the Steel Rolling direction, catches its two ends with hand, bending 90 degree ten times all constantly do not split, and prove that the toughness of its workpiece is better.
Adopt the workpiece after the present invention heat-treats, its intensity reaches 114 kilograms/square millimeter, this has improved more than 50% on GB GB5674-85 basis, planeness is less than 0.20, scrap rate is less than 0.2%, workpiece hardness HRC is 36 to 45, and its comprehensive mechanical performance surpasses the semi-finished products after the thermal treatment of U.S. L.M.S company.
In sum, technology of the present invention is simple, the workpiece that utilizes this superthin large circular shape medium and high carbon steel heat treatment of workpieces technology to obtain, and comprehensive mechanical performances such as its toughness, elasticity and wear resistance are good, and its planeness is good, yield rate is high.
Claims (10)
1. superthin large circular shape medium and high carbon steel heat treatment of workpieces technology is characterized in that carrying out according to the following steps:
The first step, handled workpiece scope: material is No. 45 to No. 85 a carbon steel, and thickness of workpiece is less than 1.5 millimeters, and the ratio of the diameter of workpiece and thickness is greater than 300 to 1, and is porose in the middle of the workpiece;
Second step, required workpiece to be processed put into the salt bath furnace 3 to 4 minutes that is warmed to 810 ℃ to 825 ℃;
The 3rd step, the workpiece after will taking out from salt bath furnace are put into the nitrate furnace 30 to 35 seconds that has been warmed to 290 ℃ to 320 ℃ immediately;
The 4th step, the workpiece from nitrate furnace after the taking-up are put into planer immediately and are flattened, and its time is no less than 1 minute, and wherein the pressing plate of planer needs to 100 to 120 ℃ of pre-temperature;
Workpiece clamp after the 5th step, the process leveling;
The 6th step, workpiece and anchor clamps after will clamping are put into the typing tempering stove together, and the time is 4 to 8 hours, and the temperature of the tempering stove of finalizing the design is 400 to 500 ℃;
The 7th step, the workpiece and the anchor clamps that will take out from tempering stove are placed on air, make the temperature of workpiece and anchor clamps drop to 180 to 220 ℃;
The 8th workpiece and the anchor clamps that go on foot, will drop to 180 to 220 ℃ are put into 50 to 80 ℃ warm water, and soak time is no less than 8 hours;
Anchor clamps on the 9th workpiece that goes on foot, will take out from warm water unclamp, and obtain the good workpiece of thermal treatment.
2. superthin large circular shape medium and high carbon steel heat treatment of workpieces technology according to claim 1, the external diameter that it is characterized in that workpiece are that 407.5 millimeters, internal diameter are that 150 millimeters, thickness are 0.93 to 0.97 millimeter.
3. superthin large circular shape medium and high carbon steel heat treatment of workpieces technology according to claim 1, the external diameter that it is characterized in that workpiece are that 321.5 millimeters, internal diameter are that 40 millimeters, thickness are 0.93 to 0.97 millimeter.
4. according to claim 1 or 2 or 3 described superthin large circular shape medium and high carbon steel heat treatment of workpieces technologies, it is characterized in that in second step required workpiece to be processed put into the salt bath furnace 3 to 4 minutes that is warmed to 810 ℃ to 820 ℃.
5. according to claim 1 or 2 or 3 described superthin large circular shape medium and high carbon steel heat treatment of workpieces technologies, it is characterized in that in second step required workpiece to be processed put into the salt bath furnace 3 to 4 minutes that is warmed to 815 ℃ to 825 ℃.
6. according to claim 1 or 2 or 3 described superthin large circular shape medium and high carbon steel heat treatment of workpieces technologies, the workpiece after it is characterized in that will taking out from salt bath furnace in the 3rd step is put into the nitrate furnace 30 to 35 seconds that has been warmed to 290 ℃ to 310 ℃ immediately.
7. according to claim 1 or 2 or 3 described superthin large circular shape medium and high carbon steel heat treatment of workpieces technologies, the workpiece after it is characterized in that will taking out from salt bath furnace in the 3rd step is put into the nitrate furnace 30 to 35 seconds that has been warmed to 310 ℃ to 320 ℃ immediately.
8. according to claim 1 or 2 or 3 described superthin large circular shape medium and high carbon steel heat treatment of workpieces technologies, it is characterized in that planer is hydraulic pressure planer or dead-weight pressing plate apparatus for leveling.
9. according to claim 1 or 2 or 3 described superthin large circular shape medium and high carbon steel heat treatment of workpieces technologies, the tempering stove that it is characterized in that finalizing the design is nitrate furnace or well formula tempering stove or chamber type electric resistance furnace.
10. according to claim 1 or 2 or 3 described superthin large circular shape medium and high carbon steel heat treatment of workpieces technologies, it is characterized in that adopting in the 5th step 100 to 160 t hydraulic press that anchor clamps are compressed back fastening clips bolt workpiece is clamped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00119392 CN1107118C (en) | 2000-07-08 | 2000-07-08 | Heat treatment process for superthin large circular shape medium-high carbon steel workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00119392 CN1107118C (en) | 2000-07-08 | 2000-07-08 | Heat treatment process for superthin large circular shape medium-high carbon steel workpiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1278014A true CN1278014A (en) | 2000-12-27 |
| CN1107118C CN1107118C (en) | 2003-04-30 |
Family
ID=4587642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00119392 Expired - Fee Related CN1107118C (en) | 2000-07-08 | 2000-07-08 | Heat treatment process for superthin large circular shape medium-high carbon steel workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1107118C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422351C (en) * | 2006-07-10 | 2008-10-01 | 北京时代新人轴承有限公司 | Stepped quenching process and its apparatus suitable for bainite and martensite quenching |
| CN102500824A (en) * | 2011-11-07 | 2012-06-20 | 山西鼎荣冷弯型钢有限公司 | Method for repairing circular saw web of flying sawing machine |
| CN103667669A (en) * | 2013-12-09 | 2014-03-26 | 贵州华阳电工有限公司 | Method for flattening manganese steel belt |
| CN104313259A (en) * | 2014-11-22 | 2015-01-28 | 唐山亚捷机械有限公司 | Martensite and bainite isothermal salt bath quenching production line for high chrome bearing steel part |
| CN106929638A (en) * | 2017-04-24 | 2017-07-07 | 上海交通大学 | A kind of use hot water as cooling medium cleaning grade quench method |
| CN110640216A (en) * | 2019-08-14 | 2020-01-03 | 杭州博野精密工具有限公司 | Cold saw circular saw blade manufacturing process |
| CN114250353A (en) * | 2021-12-22 | 2022-03-29 | 辽宁乾金金属材料开发有限公司 | Heat treatment process for stone cutting saw blade |
-
2000
- 2000-07-08 CN CN 00119392 patent/CN1107118C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422351C (en) * | 2006-07-10 | 2008-10-01 | 北京时代新人轴承有限公司 | Stepped quenching process and its apparatus suitable for bainite and martensite quenching |
| CN102500824A (en) * | 2011-11-07 | 2012-06-20 | 山西鼎荣冷弯型钢有限公司 | Method for repairing circular saw web of flying sawing machine |
| CN103667669A (en) * | 2013-12-09 | 2014-03-26 | 贵州华阳电工有限公司 | Method for flattening manganese steel belt |
| CN104313259A (en) * | 2014-11-22 | 2015-01-28 | 唐山亚捷机械有限公司 | Martensite and bainite isothermal salt bath quenching production line for high chrome bearing steel part |
| CN106929638A (en) * | 2017-04-24 | 2017-07-07 | 上海交通大学 | A kind of use hot water as cooling medium cleaning grade quench method |
| CN106929638B (en) * | 2017-04-24 | 2018-11-16 | 上海交通大学 | A kind of cleaning grade quench method for using hot water as cooling medium |
| CN110640216A (en) * | 2019-08-14 | 2020-01-03 | 杭州博野精密工具有限公司 | Cold saw circular saw blade manufacturing process |
| CN114250353A (en) * | 2021-12-22 | 2022-03-29 | 辽宁乾金金属材料开发有限公司 | Heat treatment process for stone cutting saw blade |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1107118C (en) | 2003-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1107118C (en) | Heat treatment process for superthin large circular shape medium-high carbon steel workpiece | |
| CN1438926A (en) | Method of production of surface densified powder metal components | |
| CN101033769A (en) | Special-shaped anti-removing nut and manufacture method thereof | |
| CN111763889A (en) | High-carbon bearing steel and preparation method thereof | |
| CN1240493C (en) | Structural body and method for cold rolling | |
| CN1209466A (en) | Two-stage carbonitriding technology for gear | |
| CN1370851A (en) | Plastic-forming die steel and its heat treatment process | |
| CN101333688A (en) | Method for producing traceless quenching and embossing saw blade | |
| CN1772939A (en) | High purity steel belt for textile needle and its production process | |
| CN1257029C (en) | Sub-heat control fine forging process for automobile spline shaft | |
| CN101058887A (en) | Heat treatment process for automobile gear shifting box synchronizer gear sheath | |
| CN1095109A (en) | A kind of reforming technology of waste or old roll | |
| CN109423543B (en) | Spiral roller for metal surface treatment and treatment device and treatment method thereof | |
| CN1095970A (en) | Process for cold-drawing spline shaft | |
| CN109338286A (en) | A kind of boron-aluminium co-permeation treatment process of stamping die | |
| CN100343651C (en) | Method for manufacturing steel inlaid guide rail sheet of large tonnage tester for metal tension test | |
| CN115449607B (en) | Method for determining isothermal gas quenching process parameters for prolonging service life of cold working die material | |
| CN210560594U (en) | Heat treatment fixing and forming die for leaf spring | |
| CN1084647C (en) | Technology for manufacturing fully-threaded bright and high-strength very long screw bolt | |
| CN112126766A (en) | Workpiece suspension device for shaft pin quenching | |
| RU2349436C1 (en) | Method for manufacture of die blocks for extrusion of pipe ends | |
| CN111843387A (en) | Production process of high-precision linear guide rail | |
| CN101066615A (en) | Stone cutting saw blade and its production process | |
| CN112846013B (en) | Method for manufacturing forging blank for oil exploitation equipment | |
| CN205642958U (en) | Metal high temperature tensile sample thread rolling processingequipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |