CN102888581A - Heat treatment technology of small hoist crane - Google Patents
Heat treatment technology of small hoist crane Download PDFInfo
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- CN102888581A CN102888581A CN2011102014518A CN201110201451A CN102888581A CN 102888581 A CN102888581 A CN 102888581A CN 2011102014518 A CN2011102014518 A CN 2011102014518A CN 201110201451 A CN201110201451 A CN 201110201451A CN 102888581 A CN102888581 A CN 102888581A
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Abstract
A heat treatment technology of a small hoist crane is characterized in that a ferrite chemical heat treatment and austenite heat treatment combined method is adopted. The technology comprises the following steps of: firstly carrying out low-temperature chemical sulfonitriding heat treatment; then carrying out high-temperature chemical carbonitriding heat treatment above the critical temperature; simultaneously carrying out high-temperature chemical boronizing heat treatment above the critical temperature; carrying out austenitic nitriding; and finally hardening and tempering. The invention provides a safe and reliable heat treatment technology of a small hoist crane which has advantages of corrosion resistance, abrasion resistance, long service life, low noise and low cost of use and maintenance.
Description
Technical fieldThe present invention relates to a kind of thermal treatment process field of small lifting equipment, specifically relate to the thermal treatment process of small-sized hoist crane.
Background technologyThe present invention relates to the thermal treatment process of small-sized hoist crane.Existing small-sized electric cucurbit is comprised of motor, speed reduction unit, traveling mechanism, stopper, trip switch, reel, most of parts are made by metal, in use there is surface corrosion, the phenomenon of getting rusty along with the prolongation of duration of service, can form crackle in the metallic surface, crackle progressively expansion biscuit metal can occur and peels off, cause the uneven of metallic surface, cause vibration and noise, even cause the forfeiture transmission capacity.Simultaneously use procedure meeting produces wearing and tearing, and constantly wearing and tearing make a noise in transmission process so that cut appears in the metallic surface, have shortened the work-ing life of hoist crane, have increased construction cost, has reduced the security of construction.
Summary of the inventionIn view of the defective that prior art exists, the objective of the invention is to remedy the weak point of present small-sized hoist crane, provide a kind of corrosion-resistant, wear-resistant, long service life, noise is little, use and maintenance cost are low, the thermal treatment process of safe and reliable small-sized hoist crane.
For achieving the above object, the technology used in the present invention solution is: the thermal treatment process of small-sized hoist crane is to adopt the method for ferrite thermo-chemical treatment and the combination of austenite heat treatment phase.Carry out first the cryochemistry thermal treatment of sulfur-nitrogen co-cementing; More than critical temperature, carry out the pyrochemistry thermal treatment of carbonitriding again; More than critical temperature, carry out the pyrochemistry thermal treatment of boronising simultaneously; Implement again austenitic nitriding; Modified in execution at last.
Concrete technology implementation mode is: (1) purifies the ammonia process, be heated to 550 ℃ ± 50 ℃ by helical pipe, ammonia is through adding heat evolution nitrogen ion, in mixing tank, add Sulfothiorine, and temperature is remained within 700 ℃ ± 50 ℃, and apply 0.2 ± 0.05Pa barometric point, sulphur nitrogen ion is around rotational flow pipeline formation eddy current is full of at a slow speed pending parts, after 2 hours, cooling, when temperature is down to 400 ℃ ± 50 ℃, stop ammonia and pass into, continue to be cooled to the parts cooling.
(2) the ammonia process is purified, to be heated to 550 ℃ ± 50 ℃ by helical pipe, ammonia passes into carburizing agent through adding heat evolution nitrogen ion in mixing tank, after 1.5 ± 0.5 hours, after carburized depth reaches requirement, temperature is remained within 700 ℃ ± 50 ℃ scopes, and apply 0.05 ± 0.03 Pa barometric point, carburetted hydrogen gas and nitrogen ion are around rotational flow pipeline formation eddy current is full of at a slow speed pending parts, after 3 ± 0.5 hours, stop carburizing agent and pass into.
(3) with the technical grade borax 550 ℃ ± 50 ℃ dryings 4 ± 0.5 hours, under synthermal 700 ℃ ± 50 ℃ scopes, melt; Technical grade sodium-chlor 350 ℃ ± 50 ℃ dryings 2.5 ± 0.5 hours, is joined in the borax and mixes, and blending ratio is that borax is 19:7 than sodium-chlor, is warming up to 800 ℃ ± 50 ℃, and it is full of around the pending parts, keeps 3.5 ± 0.5 hours.
(4) continue to be cooled in 600 ℃ ± 50 ℃ scopes, carry out austenitic nitriding, the ammonia process is purified, be heated to 600 ℃ ± 50 ℃ by helical pipe, ammonia is through adding heat evolution nitrogen ion, treats that ammonia decomposes when obtaining the highest nitrogen concentration the high-nitrogen austenitic layer that can reach capacity.
(5) in fast cooling to the 250 ℃ ± 50 ℃ scope, be evacuated to vacuum, carry out means of isothermal quenching, be incubated 1.5 ± 0.5 hours; Be warming up to again in 650 ℃ ± 50 ℃ scopes, keep vacuum state, carry out high tempering, be incubated 6～8 hours, be down to again room temperature, finished whole heat treatment process.
To have overcome small-sized hoist crane perishable, easy to wear in when construction in view of the present invention, and work-ing life is short, and noise is larger, the shortcoming that safe reliability is low; Provide a kind of corrosion-resistant, wear-resistant, long service life, noise is little, and use and maintenance cost are low, the thermal treatment process of safe and reliable small-sized hoist crane.
Embodiment
The technology used in the present invention solution is: the method that adopts ferrite thermo-chemical treatment and the combination of austenite heat treatment phase.Carry out first the cryochemistry thermal treatment of sulfur-nitrogen co-cementing; More than critical temperature, carry out the pyrochemistry thermal treatment of carbonitriding again; More than critical temperature, carry out the pyrochemistry thermal treatment of boronising simultaneously; Implement again austenitic nitriding; Modified in execution at last.
Embodiment is: (1) purifies the ammonia process, be heated to 550 ℃ ± 50 ℃ by helical pipe, ammonia adds Sulfothiorine through adding heat evolution nitrogen ion in mixing tank, and temperature is remained within 700 ℃ ± 50 ℃, and applying 0.2 ± 0.05Pa barometric point, sulphur nitrogen ion is around rotational flow pipeline formation eddy current is full of at a slow speed pending parts, after 2.5 hours, cooling, when temperature is down to 400 ℃ ± 50 ℃, stop ammonia and pass into, continue to be cooled to the parts cooling.
(2) the ammonia process is purified, to be heated to 550 ℃ ± 50 ℃ by helical pipe, ammonia passes into carburizing agent through adding heat evolution nitrogen ion in mixing tank, after 1.5 ± 0.5 hours, after carburized depth reaches requirement, temperature is remained within 700 ℃ ± 50 ℃ scopes, and apply 0.05 ± 0.03 Pa barometric point, carburetted hydrogen gas and nitrogen ion are around rotational flow pipeline formation eddy current is full of at a slow speed pending parts, after 3 ± 0.5 hours, stop carburizing agent and pass into.
(3) with the technical grade borax 550 ℃ ± 50 ℃ dryings 4 ± 0.5 hours, under synthermal 700 ℃ ± 50 ℃ scopes, melt; Technical grade sodium-chlor 350 ℃ ± 50 ℃ dryings 2.5 ± 0.5 hours, is joined in the borax and mixes, and blending ratio is that borax is 19:7 than sodium-chlor, is warming up to 800 ℃ ± 50 ℃, and it is full of around the pending parts, keeps 3.5 ± 0.5 hours.
(4) continue to be cooled in 600 ℃ ± 50 ℃ scopes, carry out austenitic nitriding, the ammonia process is purified, be heated to 600 ℃ ± 50 ℃ by helical pipe, ammonia is through adding heat evolution nitrogen ion, treats that ammonia decomposes when obtaining the highest nitrogen concentration the high-nitrogen austenitic layer that can reach capacity.
(5) in fast cooling to the 250 ℃ ± 50 ℃ scope, be evacuated to vacuum, carry out means of isothermal quenching, be incubated 1.5 ± 0.5 hours; Be warming up to again in 650 ℃ ± 50 ℃ scopes, keep vacuum state, carry out high tempering, be incubated 6～8 hours, be down to again room temperature, finished whole heat treatment process.
Claims (6)
1. the thermal treatment process of small-sized hoist crane is characterized in that adopting the method for ferrite thermo-chemical treatment and the combination of austenite heat treatment phase; Carry out first the cryochemistry thermal treatment of sulfur-nitrogen co-cementing; More than critical temperature, carry out the pyrochemistry thermal treatment of carbonitriding again; More than critical temperature, carry out the pyrochemistry thermal treatment of boronising simultaneously; Implement again austenitic nitriding; Modified in execution at last.
2. the thermal treatment process of small-sized hoist crane according to claim 1, the thermal treatment process of sulfur-nitrogen co-cementing is characterized in that ammonia through purifying, be heated to 550 ℃ ± 50 ℃ by helical pipe, ammonia is through adding heat evolution nitrogen ion, in mixing tank, add Sulfothiorine, and temperature is remained within 700 ℃ ± 50 ℃, and apply 0.2 ± 0.05Pa barometric point, sulphur nitrogen ion is around rotational flow pipeline formation eddy current is full of at a slow speed pending parts, after 2.5 hours, cooling is when temperature is down to 400 ℃ ± 50 ℃, stop ammonia and pass into, continue to be cooled to the parts cooling.
3. the thermal treatment process of small-sized hoist crane according to claim 1, the thermal treatment process of carbonitriding is characterized in that ammonia through purifying, to be heated to 550 ℃ ± 50 ℃ by helical pipe, ammonia is through adding heat evolution nitrogen ion, in mixing tank, pass into carburizing agent, after 1.5 ± 0.5 hours, after carburized depth reaches requirement, temperature is remained within 700 ℃ ± 50 ℃ scopes, and apply 0.05 ± 0.03 Pa barometric point, carburetted hydrogen gas and nitrogen ion after 3 ± 0.5 hours, stop carburizing agent and pass into around rotational flow pipeline formation eddy current is full of at a slow speed pending parts.
4. the thermal treatment process of small-sized hoist crane according to claim 1, the thermal treatment process of boronising is characterized in that the technical grade borax melting under synthermal 700 ℃ ± 50 ℃ scopes 550 ℃ ± 50 ℃ dryings 4 ± 0.5 hours; Technical grade sodium-chlor 350 ℃ ± 50 ℃ dryings 2.5 ± 0.5 hours, is joined in the borax and mixes, and blending ratio is that borax is 19:7 than sodium-chlor, is warming up to 800 ℃ ± 50 ℃, and it is full of around the pending parts, keeps 3.5 ± 0.5 hours.
5. the thermal treatment process of small-sized hoist crane according to claim 1, the thermal treatment process of austenitic nitriding is characterized in that continuing to be cooled in 600 ℃ ± 50 ℃ scopes, carry out austenitic nitriding, the ammonia process is purified, be heated to 600 ℃ ± 50 ℃ by helical pipe, ammonia is through adding heat evolution nitrogen ion, treats that ammonia decomposes when obtaining the highest nitrogen concentration the high-nitrogen austenitic layer that can reach capacity.
6. the thermal treatment process of small-sized hoist crane according to claim 1, modified thermal treatment process is characterized in that in fast cooling to 250 behind the parts austenitic nitriding ℃ ± 50 ℃ scope, be evacuated to vacuum, carry out means of isothermal quenching, be incubated 1.5 ± 0.5 hours; Be warming up to again in 650 ℃ ± 50 ℃ scopes, keep vacuum state, carry out high tempering, be incubated 6～8 hours, be down to again room temperature, finished whole thermal treatment process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102014518A CN102888581A (en) | 2011-07-19 | 2011-07-19 | Heat treatment technology of small hoist crane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102014518A CN102888581A (en) | 2011-07-19 | 2011-07-19 | Heat treatment technology of small hoist crane |
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| CN102888581A true CN102888581A (en) | 2013-01-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032311A (en) * | 2014-06-30 | 2014-09-10 | 张家港市华尊宝特种材料科技有限公司 | Thermal treatment technology for special-shaped steel tube |
| CN109338278A (en) * | 2018-10-08 | 2019-02-15 | 宁国市开源电力耐磨材料有限公司 | A kind of heat treatment process of bucket tooth steel alloy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GR960300067T1 (en) * | 1995-03-22 | 1996-11-30 | Bilstein August Gmbh Co Kg | Surface treated piston |
| CN101880853A (en) * | 2010-07-13 | 2010-11-10 | 杨洪举 | Heat treatment technology for bearing box |
| CN102071428A (en) * | 2010-12-29 | 2011-05-25 | 大连引领科技发展有限公司 | Thermal treatment method for high-precision bearing box |
| CN102080204A (en) * | 2011-03-10 | 2011-06-01 | 大连三木得科技有限公司 | Heating processing technology of metal steel tube |
-
2011
- 2011-07-19 CN CN2011102014518A patent/CN102888581A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GR960300067T1 (en) * | 1995-03-22 | 1996-11-30 | Bilstein August Gmbh Co Kg | Surface treated piston |
| CN101880853A (en) * | 2010-07-13 | 2010-11-10 | 杨洪举 | Heat treatment technology for bearing box |
| CN102071428A (en) * | 2010-12-29 | 2011-05-25 | 大连引领科技发展有限公司 | Thermal treatment method for high-precision bearing box |
| CN102080204A (en) * | 2011-03-10 | 2011-06-01 | 大连三木得科技有限公司 | Heating processing technology of metal steel tube |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032311A (en) * | 2014-06-30 | 2014-09-10 | 张家港市华尊宝特种材料科技有限公司 | Thermal treatment technology for special-shaped steel tube |
| CN109338278A (en) * | 2018-10-08 | 2019-02-15 | 宁国市开源电力耐磨材料有限公司 | A kind of heat treatment process of bucket tooth steel alloy |
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Application publication date: 20130123 |