CN102534465A - Heat treatment process for surface hardening and carbonitriding of hydraulic parts - Google Patents
Heat treatment process for surface hardening and carbonitriding of hydraulic parts Download PDFInfo
- Publication number
- CN102534465A CN102534465A CN2012100235031A CN201210023503A CN102534465A CN 102534465 A CN102534465 A CN 102534465A CN 2012100235031 A CN2012100235031 A CN 2012100235031A CN 201210023503 A CN201210023503 A CN 201210023503A CN 102534465 A CN102534465 A CN 102534465A
- Authority
- CN
- China
- Prior art keywords
- airshed
- carbon potential
- hydraulic part
- keeps
- carbonitriding
- 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
- 238000005256 carbonitriding Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000008569 process Effects 0.000 title claims abstract description 23
- 238000010438 heat treatment Methods 0.000 title abstract description 17
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 63
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000005255 carburizing Methods 0.000 claims abstract description 24
- 238000010791 quenching Methods 0.000 claims abstract description 22
- 230000000171 quenching effect Effects 0.000 claims abstract description 19
- 238000005496 tempering Methods 0.000 claims abstract description 17
- 238000010792 warming Methods 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 11
- 238000002791 soaking Methods 0.000 claims description 10
- 239000004215 Carbon black (E152) Substances 0.000 claims description 9
- 229930195733 hydrocarbon Natural products 0.000 claims description 9
- 150000002430 hydrocarbons Chemical class 0.000 claims description 9
- 238000007669 thermal treatment Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 239000000356 contaminant Substances 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 abstract description 7
- 238000005406 washing Methods 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000013256 coordination polymer Substances 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000010407 vacuum cleaning Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Abstract
The invention provides a heat treatment process for surface hardening and carbonitriding of hydraulic parts, which includes the following steps: a washing the hydraulic parts preparing for heat treatment to remove greasy dirt; b warming a carburizing multi-purpose furnace, and performing pre-carburizing treatment; c putting the hydraulic parts washed cleanly through the step a in the carburizing multi-purpose furnace, and performing strong carburizing; d adjusting carbon potential after the strong carburizing to perform diffusion; e putting the hydraulic parts after carbonitriding in the step d in a quenching chamber of the carburizing multi-purpose furnace to be quenched, filtering oil and discharging from the furnace; and f washing the hydraulic parts of the step e, and putting the hydraulic parts in a tempering furnace to be tempered to obtain products.
Description
Technical field
The present invention relates to the heat treatment technics field, relate in particular to a kind of material hydraulic part surface hardening carbonitriding thermal treatment process.
Background technology
Carbonitriding is the chemical heat treatment process that active C, N atom infiltrate steel piece surface simultaneously; It is to ooze C and ooze combining of N chemical heat treatment process; Have both strong points concurrently; And that the C-N co-penetration layer enbrittles is little, toughness is high and firmly reach characteristics such as antistripping property with matrix bond, has progressively to replace oozing C trend.But in actual production, can produce various defectives because of various reasons, especially to the control aspect of rigidity layer, be the important prerequisite of guaranteeing infiltration layer quality that C, N ooze altogether and product work-ing life.
[0003] carbonitriding process must strictly be controlled the carbon nitrogen concentration of infiltration layer; Content is low excessively, can not obtain high intensity, hardness and ideal unrelieved stress, influences wear resistance and fatigue strength; Otherwise; Not only a large amount of uneven block carbon nitrogen compounds appear in the top layer, fragility increases, and the back remained austenite content that quenches is increased severely, and influence rigidity layer and fatigue strength; And the quality control of rigidity layer is a technology that is difficult to grasp in the current industry, and we have invented a kind of heat-treatment technology method of may command rigidity layer to these problems.
Summary of the invention
The object of the invention is intended to overcome the deficiency of prior art, and a kind of respond well hydraulic part surface hardening carbonitriding thermal treatment process is provided.
The object of the invention can be realized through following technical measures:
Treatment process of the present invention carries out as follows:
A. the hydraulic part of preparing to heat-treat is cleaned, remove surface and oil contaminant;
B. carburizing multipurpose furnace is warming up to 910-930 ℃; Insulation 1.5-2.5h oozes processing then in advance, and at first controlling carbon potential is that 0.3-0.5% keeps 1.5-2.5h; Improving carbon potential again is that 0.7-0.9% keeps 1.5-2.5h, and improving carbon potential once more is that 1.0-1.2% keeps 1.5-2.5h.
C. with a step in the hydraulic part that cleans up is packed carburizing multipurpose furnace into, control furnace temperature be 840-860 ℃, NH
3Airshed is 3.4-3.6L/min, CH
3The OH airshed is 2600-3000mL/h, keeps 20-40min, and the control furnace temperature is that 840-860 ℃, carbon potential are 1.0-1.1%, NH after the soaking
3Airshed is 3.4-3.6L/min, CH
3The OH airshed is 2600-3000mL/h, oozes 100-140min by force;
D. oozing back adjustment carbon potential by force is 0.7-0.9%, maintenance 20-40min, NH
3Airshed is that 3.4-3.6L/min carries out
Diffusion, being cooled to 790-810 ℃, carbon potential at last is 0.7-0.9%, NH
3Airshed is 3.4-3.6L/min, CH
3The OH airshed is 2600-3000mL/h, keeps 20-40min;
E. place the quenching chamber of carburizing multipurpose furnace to quench the hydraulic part of d step after carbonitriding, use quenching oil to cool off 10-20min down as 50-70 ℃, come out of the stove behind the oil strain in temperature;
F. the hydraulic part with the e step cleans, (can 1.5-2.5h be all right at 170-190 ℃ of following tempering 100-140 min in the tempering stove of packing into then?) after product.
The object of the invention also can be realized through following technical measures:
As preferably, the described cleaning of above-mentioned a step is in hydrocarbon vacuum solvent cleaning machines, to carry out.
As preferably, the b step is described to be warming up to 920 ℃ with carburizing multipurpose furnace, is incubated 120 min, and described control carbon potential is 0.4% to keep 1.5-2.5h, improves carbon potential again and is 0.8% and keep 2h, improves carbon potential once more and is 1.1% and keep 2h; The described control furnace temperature of c step is 850 ℃, NH
3Airshed is 3.5L/min, CH
3The OH airshed is 2800mL/h, keeps 30min, and the control furnace temperature is that 850 ℃, carbon potential are 1.05%, NH after the soaking
3Airshed is 3.5L/min, CH
3The OH airshed is 2800mL/h, oozes 2h by force; The d step is described, and to ooze back adjustment carbon potential by force be 0.8%, keep 30min, NH
3Airshed is that 3.5L/min spreads, and being cooled to 800 ℃, carbon potential at last is 0.8%, NH
3Airshed is 3.5L/min, CH
3The OH airshed is 2800mL/h, keeps 30min; The described quenching temperature of e step is 60 ℃ of cooling 15min; The described tempering stove of f step is at 180 ℃ of following tempering 2h.
Treatment process of the present invention is adopting N aspect the carbonitriding processing
2As protection gas, CH
3OH
,NH
3And C
3H
8Gas carbonitriding technology as atmosphere gas.Guarantee the requirement of hardness, depth of penetration simultaneously in order to improve carbonitriding speed; The present invention has adopted carbonitriding+quenching+tempered technology; Be divided into three phases in this technological process, high temperature (high carbon potential)-high temperature (low carbon potential)-low temperature (low carbon potential), the fs is adopted the high carbon potential of high temperature (850 ± 10 ℃, 100-140min); Hydraulic part is oozed by force; Subordinate phase adopts the low carbon potential of high temperature (850 ± 10 ℃, 20-40min), to accelerate the surperficial carbon content of velocity of diffusion adjustment hydraulic part of active atoms of carbon, to obtain the gently dipping perfect condition of concentration gradient; Phase III is adopted the low carbon potential of low temperature (800 ± 10 ℃ of 20-40min), and the reduction of this stage to temperature can make hydraulic part when postorder quenches, reduce internal stress and distortion as far as possible.
NH in the heat treatment process
3Under the accurate control of gas flow SV, feed body of heater inside, CH with the constant rate about 3.5L/min
3OH is as carrier gas, and flow control is about 2800mL/h, through accurate control enriched gas C
3H
8Flow adjust carbon potential.
It is 6 steps that this technology is divided into, the temperature of each step, and time and gas flow are following;
1, the first step is the temperature rise period, and design temperature rises to 850 ℃.
2, second step was holding stage, 850 ℃ of soaking time 30min of temperature, and this stage mainly is soaking, makes the surface of hydraulic part balanced consistent with core temperature.
3, the 3rd step is for oozing the stage 850 ℃ of soaking time 120min of temperature, CP:1.05%, NH by force
3Flow is 3.5L/min, and this stage carbon potential is higher, produces a large amount of active atoms of carbon in the stove hydraulic part is oozed by force.
4, the 4th step was diffusion phase, 850 ℃ of soaking time 30min of temperature, CP:0.80%, NH
3Flow is 3.5L/min;
5, the 5th step was temperature-fall period, and design temperature is reduced to 800 ℃; Because hydraulic part needs to quench after the carbonitriding, when quenching, reduce internal stress and distortion in order to make hydraulic part, so temperature is dropped to 800 ℃
6, the 6th step was holding stage, 800 ℃ of soaking time 30min of temperature, CP:0.80%, NH
3Flow is 3.5L/min, and this stage mainly is soaking, makes the surface of hydraulic part balanced consistent with core temperature.
Because the present invention has adopted above-mentioned thermal treatment process; Having guaranteed that the stove internal heating distributes rationally makes hydraulic part be heated evenly, through accurate control C, N gesture, contain C, N massfraction to can be controlled in ± 0.01%; And through time control accurately; 15CrMo material hydraulic part rigidity layer by after this thermal process processing can be precisely controlled, has high firmness, high resistance to tempering, high-wearing feature and fatigue resistance, can avoid steel piece surface to take off C and oxidation and surperficial shelly and netted compound fully; And in the quenching stage after carbonitriding, reduce quenching temperature and can make hydraulic part when quenching, reduce internal stress and distortion as far as possible.The C that obtains, N cocementation layer depth, microstructure, performance meet the technical requirements of 15CrMo material hydraulic part: surface hardness 680-750HV, core hardness 241-273HV, hard formation thickness: 0.30 ± 0.03mm correct grinding surplus 40-60 μ m.
Embodiment
Below 15CrMo material hydraulic part surface hardening carbonitriding thermal treatment process embodiment is further specified:
The equipment that in this heat treatment process, adopts has:
1, VCH-1000 (the hydrocarbon flux cleaning machine of vacuum) carries out the decontamination cleaning of hydraulic part, and the characteristics of this equipment are to utilize the agent for carbon hydrogen detergent wash cycles to remove the greasy dirt on the hydraulic part under the environment of negative pressure of vacuum.Wherein add a spot of FNAM agent and can effectively remove hydraulic part and adding the cutting fluid of adhering to man-hour, make the hydraulic part cleaning surfaces.Carbon, nitrogen-atoms better are adsorbed on the hydraulic part surface when handling for postorder.
2, BBH-1000-3R carburizing multipurpose furnace, this equipment are that quenching chamber and heating chamber are formed by the displacement chamber.Accurately control the time of processing in the treating processes by sequence controller, temperature and atmosphere, make temperature error accurately control to ± 0.1 ℃ of scope in, time error is within ± 1min.Atmosphere gas is by (CH
3OH
,NH
3,C
3H
8) form, by the gas flow SV to (CH
3OH
,NH
3,C
3H
8) flow accurately control, through in the program to the setting of atmosphere gas, each gas of gas flow solenoid control gets in stove, the controllable precision of carbon potential is reached ± 0.01%.CH in the process
3OH is as carrier gas, and flow is controlled at 2800mL/h always, through accurate control enriched gas C
3H
8Adjust the carbon potential of furnace atmosphere, NH
3Inner with the flow feeding body of heater of 3.5L/min always under the accurate control of gas flow SV.
3, BTF-1000 tempering stove: be mainly used in hydraulic part is carried out temper, temperature is set 180 ℃ of insulation 90min, and this low-temperaturetempering can be eliminated part internal stress and residual austenite, and tissue is tended towards stability.
Embodiment 1:
This 15CrMo material hydraulic part surface hardening carbonitriding heat treatment process is following:
1, the hydraulic part that will prepare processing is handled preceding cleaning in hydrocarbon vacuum solvent cleaning machines, the clean no greasy dirt of hydraulic part surface requirements after requiring to clean.
2, carburizing multipurpose furnace is adopted three sections heating schedules earlier, promptly first section: be warming up to 300 ℃, insulation 120min; Second section: be warming up to 600 ℃, insulation 120min; The 3rd section: rise to 910 ℃ of insulation 100 min, remake and ooze processing in advance.In advance flushing during the beginning temperature be 910 ℃, carbon-potential control keeps 140 min 0.4%, 910 ℃ temperature-resistant, to improve carbon potential be 0.8% to keep 100 min, improve carbon potential once more and be 1.05% and keep 140 min.
3, the hydraulic part after will cleaning is packed in the carburizing multipurpose furnace, and is controlled at 860 ℃ and keeps 20min (this moment NH
3Airshed is controlled to be 3.6L/min, CH
3The OH airshed is controlled at 2600mL/h, this process make hydraulic part surface and core temperature balanced to).Temperature and time accurately is controlled at 860 ℃ and oozes 140min by force after equal thermal processs, and (this moment, carbon potential was 1.1%, NH
3Flow is 3.6L/min, CH
3The OH flow control is at 2600mL/h).The adjustment carbon potential is 0.7% when oozing back entering diffusion phase by force, keeps 40min, NH
3Flow is 3.4L/min.Being cooled to 810 ℃ of carbon potentials at last is 0.70%, keeps 40min, NH
3Flow is 3.6L/min, CH
3The OH flow control is at 3000mL/h.
4, after carbonitriding finishes, hydraulic part is quenched in the quenching chamber of carburizing multipurpose furnace, using quenching oil is 60 ℃ of cooling 20min down in temperature, comes out of the stove behind the oil strain.
5, the hydraulic part after will handling cleans in hydrocarbon vacuum cleaning machine.Remove the dirt settling on hydraulic part surface.
6, the hydraulic part after will cleaning is packed into and is come out of the stove after tempering stove is set 170 ℃ of tempering 140min.
Embodiment 2:
This 15CrMo material hydraulic part surface hardening carbonitriding heat treatment process is following:
1, the hydraulic part that will prepare processing is handled preceding cleaning in hydrocarbon vacuum solvent cleaning machines, the clean no greasy dirt of hydraulic part surface requirements after requiring to clean.
2, carburizing multipurpose furnace is adopted three sections heating schedules earlier, promptly first section: be warming up to 300 ℃, insulation 120min; Second section: be warming up to 600 ℃, insulation 120min; The 3rd section: rise to 930 ℃ of insulation 140 min, remake and ooze processing in advance.In advance flushing is warming up to 930 ℃ during the beginning, and carbon-potential control keeps 100 min 0.3%, 930 ℃ temperature-resistant, to improve carbon potential be 0.9% to keep 140 min, improve carbon potential once more and be 1.0% and keep 100 min.
3, the hydraulic part after will cleaning is packed in the carburizing multipurpose furnace, and is controlled at 840 ℃ and keeps 40min (this moment NH
3Airshed is controlled to be 3.4L/min, CH
3The OH airshed is controlled at 3000mL/h, this process make hydraulic part surface and core temperature balanced to).Temperature and time accurately is controlled at 840 ℃ and oozes 100min by force after equal thermal processs, and (this moment, carbon potential was 1.0%, NH
3Flow is 3.4L/min, CH
3The OH flow control is at 3000mL/h).The adjustment carbon potential is 0.9% when oozing back entering diffusion phase by force, keeps 20min, NH
3Flow is 3.6L/min.Being cooled to 790 ℃ of carbon potentials at last is 0.9%, keeps 20min, NH
3Flow is 3.4L/min, CH
3The OH flow control is at 2600mL/h.
4, after carbonitriding finishes, hydraulic part is quenched in the quenching chamber of carburizing multipurpose furnace, using quenching oil is 70 ℃ of cooling 10min in temperature, comes out of the stove behind the oil strain.
5, the hydraulic part after will handling cleans in hydrocarbon vacuum cleaning machine.Remove the dirt settling on hydraulic part surface.
6, the hydraulic part after will cleaning is packed into and is come out of the stove after tempering stove is set 190 ℃ of tempering 100min.
Embodiment 3:
15CrMo material hydraulic part surface hardening carbonitriding heat treatment process is following:
1, the hydraulic part that will prepare processing is handled preceding cleaning in hydrocarbon vacuum solvent cleaning machines, the clean no greasy dirt of hydraulic part surface requirements after requiring to clean.
2, carburizing multipurpose furnace is adopted three sections heating schedules earlier, promptly first section: be warming up to 300 ℃, insulation 120min; Second section: be warming up to 600 ℃, insulation 120min; The 3rd section: rise to 920 ℃ of insulation 120 min, remake and ooze processing in advance.In advance flushing is warming up to 920 ℃ during the beginning, and carbon-potential control keeps 120 min 0.4%, 920 ℃ temperature-resistant, to improve carbon potential be 0.8% to keep 120 min, improve carbon potential once more and be 1.1% and keep 120 min.
3, the hydraulic part after will cleaning is packed in the carburizing multipurpose furnace, and is controlled at 850 ℃ and keeps 30min (this moment NH
3Airshed is controlled to be 3.5L/min, CH
3The OH airshed is controlled at 2800mL/h, this process make hydraulic part surface and core temperature balanced to).Temperature and time accurately is controlled at 850 ℃ and oozes 120min by force after equal thermal processs, and (this moment, carbon potential was 1.05%, NH
3Flow is 3.5L/min, CH
3The OH flow control is at 2800mL/h).The adjustment carbon potential is 0.8% when oozing back entering diffusion phase by force, keeps 30min, NH
3Flow is 3.5L/min.Being cooled to 800 ℃ of carbon potentials at last is 0.8%, keeps 30min, NH
3Flow is 3.5L/min, CH
3The OH flow control is at 2800mL/h.
4, after carbonitriding finishes, hydraulic part is quenched in the quenching chamber of carburizing multipurpose furnace, using quenching oil is 60 ℃ of cooling 15min in temperature, comes out of the stove behind the oil strain.
5, the hydraulic part after will handling cleans in hydrocarbon vacuum cleaning machine, removes the dirt settling on hydraulic part surface.
6, the hydraulic part after will cleaning pack into tempering stove set come out of the stove behind 180 ℃ of tempering 120min product.
Claims (3)
1. hydraulic part surface hardening carbonitriding thermal treatment process is characterized in that this treatment process carries out as follows:
A. the hydraulic part of preparing to heat-treat is cleaned, remove surface and oil contaminant;
B. carburizing multipurpose furnace is warming up to 910-930 ℃; Insulation 1.5-2.5h oozes processing then in advance, and at first controlling carbon potential is that 0.3-0.5% keeps 1.5-2.5h; Improving carbon potential again is that 0.7-0.9% keeps 1.5-2.5h, and improving carbon potential once more is that 1.0-1.2% keeps 1.5-2.5h;
C. with a step in the hydraulic part that cleans up is packed carburizing multipurpose furnace into, control furnace temperature be 840-860 ℃, NH
3Airshed is 3.4-3.6L/min, CH
3The OH airshed is 2600-3000mL/h, keeps 20-40min, and the control furnace temperature is that 840-860 ℃, carbon potential are 1.0-1.1%, NH after the soaking
3Airshed is 3.4-3.6L/min, CH
3The OH airshed is 2600-3000mL/h, oozes 100-140min by force;
D. oozing back adjustment carbon potential by force is 0.7-0.9%, maintenance 20-40min, NH
3Airshed is that 3.4-3.6L/min spreads, and being cooled to 790-810 ℃, carbon potential at last is 0.7-0.9%, NH
3Airshed is 3.4-3.6L/min, CH
3The OH airshed is 2600-3000mL/h, keeps 20-40min;
E. place the quenching chamber of carburizing multipurpose furnace to quench the hydraulic part of d step after carbonitriding, use quenching oil to cool off 10-20min down as 50-70 ℃, come out of the stove behind the oil strain in temperature;
F. the hydraulic part with the e step cleans, and in the tempering stove of packing into then, behind 170-190 ℃ of following tempering 1.5-2.5h, gets product.
2. a kind of hydraulic part surface hardening carbonitriding thermal treatment process according to claim 1 is characterized in that the described cleaning of a step is in hydrocarbon vacuum solvent cleaning machines, to carry out.
3. a kind of hydraulic part surface hardening carbonitriding thermal treatment process according to claim 1 is characterized in that:
The b step is described to be warming up to 920 ℃ with carburizing multipurpose furnace, is incubated 120 min, and described control carbon potential is 0.4% maintenance 1.5-2.5h, and improving carbon potential again is 0.8% maintenance 2h, and improving carbon potential once more is 1.1% maintenance 2h;
The described control furnace temperature of c step is 850 ℃, NH
3Airshed is 3.5L/min, CH
3The OH airshed is 2800mL/h, keeps 30min, and the control furnace temperature is that 850 ℃, carbon potential are 1.05%, NH after the soaking
3Airshed is 3.5L/min, CH
3The OH airshed is 2800mL/h, oozes 2h by force;
The d step is described, and to ooze back adjustment carbon potential by force be 0.8%, keep 30min, NH
3Airshed is that 3.5L/min spreads, and being cooled to 800 ℃, carbon potential at last is 0.8%, NH
3Airshed is 3.5L/min, CH
3The OH airshed is 2800mL/h, keeps 30min;
The described quenching temperature of e step is 60 ℃ of cooling 15min;
The described tempering stove of f step is at 180 ℃ of following tempering 2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210023503 CN102534465B (en) | 2012-02-02 | 2012-02-02 | Heat treatment process for surface hardening and carbonitriding of hydraulic parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210023503 CN102534465B (en) | 2012-02-02 | 2012-02-02 | Heat treatment process for surface hardening and carbonitriding of hydraulic parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102534465A true CN102534465A (en) | 2012-07-04 |
| CN102534465B CN102534465B (en) | 2013-07-17 |
Family
ID=46342476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210023503 Active CN102534465B (en) | 2012-02-02 | 2012-02-02 | Heat treatment process for surface hardening and carbonitriding of hydraulic parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102534465B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710714A (en) * | 2012-12-07 | 2014-04-09 | 厦门真冈热处理有限公司 | Automobile gearbox gear carburizing and quenching heat treatment method |
| CN103924248A (en) * | 2014-04-24 | 2014-07-16 | 鑫光热处理工业(昆山)有限公司 | Carbonitriding quenching process for car seat adjuster component |
| CN104831293A (en) * | 2015-05-26 | 2015-08-12 | 重庆银雁科技有限公司 | Technology for carburizing and quenching screws |
| CN106222606A (en) * | 2016-08-31 | 2016-12-14 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of process controlling the carburized workpiece non-martensite degree of depth |
| CN109136484A (en) * | 2018-10-30 | 2019-01-04 | 安徽芜湖海螺建筑安装工程有限责任公司 | Resisting fractre anchoring piece bending cutter material and preparation method thereof |
| CN110343996A (en) * | 2019-07-30 | 2019-10-18 | 天津创真金属科技有限公司 | The thin layer carbonitriding heat treatment process of light-duty vehicle clutch main plate |
| CN110512167A (en) * | 2019-10-11 | 2019-11-29 | 江苏康达顺精密汽车附件制造有限公司 | A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process |
| CN111549314A (en) * | 2020-05-21 | 2020-08-18 | 湖南特科能热处理有限公司 | Carburizing process for low-carbon steel thin-wall part |
| CN114774840A (en) * | 2022-05-07 | 2022-07-22 | 江苏丰东热处理及表面改性工程技术研究有限公司 | Nitriding process for powder metallurgy products |
| CN115044861A (en) * | 2022-06-27 | 2022-09-13 | 滨中元川金属制品（昆山）有限公司 | Micro-carbonitriding process for precision fastener of medium carbon alloy steel |
| CN115261775A (en) * | 2022-07-04 | 2022-11-01 | 东宇东庵(无锡)热处理有限公司 | Heat-preservation quenching heat treatment process after carbonitriding |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804128A (en) * | 2005-11-30 | 2006-07-19 | 重庆长江轴承工业有限公司 | High carbon chromium bearing parts surface chemical heat-treatment process |
| CN102230151A (en) * | 2011-07-20 | 2011-11-02 | 新大洲本田摩托有限公司 | Heat treatment process of metal workpiece |
-
2012
- 2012-02-02 CN CN 201210023503 patent/CN102534465B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804128A (en) * | 2005-11-30 | 2006-07-19 | 重庆长江轴承工业有限公司 | High carbon chromium bearing parts surface chemical heat-treatment process |
| CN102230151A (en) * | 2011-07-20 | 2011-11-02 | 新大洲本田摩托有限公司 | Heat treatment process of metal workpiece |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710714A (en) * | 2012-12-07 | 2014-04-09 | 厦门真冈热处理有限公司 | Automobile gearbox gear carburizing and quenching heat treatment method |
| CN103710714B (en) * | 2012-12-07 | 2016-02-03 | 厦门真冈热处理有限公司 | The heat treating method of automobile gearbox gear carburizing and quenching |
| CN103924248A (en) * | 2014-04-24 | 2014-07-16 | 鑫光热处理工业(昆山)有限公司 | Carbonitriding quenching process for car seat adjuster component |
| CN104831293A (en) * | 2015-05-26 | 2015-08-12 | 重庆银雁科技有限公司 | Technology for carburizing and quenching screws |
| CN104831293B (en) * | 2015-05-26 | 2017-06-20 | 重庆银雁科技有限公司 | Screw carburizing quenching process |
| CN106222606A (en) * | 2016-08-31 | 2016-12-14 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of process controlling the carburized workpiece non-martensite degree of depth |
| CN106222606B (en) * | 2016-08-31 | 2019-07-12 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of process controlling carburized workpiece non-martensite depth |
| CN109136484A (en) * | 2018-10-30 | 2019-01-04 | 安徽芜湖海螺建筑安装工程有限责任公司 | Resisting fractre anchoring piece bending cutter material and preparation method thereof |
| CN110343996A (en) * | 2019-07-30 | 2019-10-18 | 天津创真金属科技有限公司 | The thin layer carbonitriding heat treatment process of light-duty vehicle clutch main plate |
| CN110512167A (en) * | 2019-10-11 | 2019-11-29 | 江苏康达顺精密汽车附件制造有限公司 | A kind of hydraulic part Surface hardened layer carbo-nitriding heat treatment process |
| CN111549314A (en) * | 2020-05-21 | 2020-08-18 | 湖南特科能热处理有限公司 | Carburizing process for low-carbon steel thin-wall part |
| CN114774840A (en) * | 2022-05-07 | 2022-07-22 | 江苏丰东热处理及表面改性工程技术研究有限公司 | Nitriding process for powder metallurgy products |
| CN115044861A (en) * | 2022-06-27 | 2022-09-13 | 滨中元川金属制品（昆山）有限公司 | Micro-carbonitriding process for precision fastener of medium carbon alloy steel |
| CN115044861B (en) * | 2022-06-27 | 2023-11-17 | 滨中元川金属制品（昆山）有限公司 | Micro-carbonitriding process for medium carbon alloy steel precise fastener |
| CN115261775A (en) * | 2022-07-04 | 2022-11-01 | 东宇东庵(无锡)热处理有限公司 | Heat-preservation quenching heat treatment process after carbonitriding |
| CN115261775B (en) * | 2022-07-04 | 2023-09-19 | 东宇东庵(无锡)科技有限公司 | Thermal treatment process for thermal insulation quenching after carbonitriding |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102534465B (en) | 2013-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102534465B (en) | Heat treatment process for surface hardening and carbonitriding of hydraulic parts | |
| CN102676752B (en) | Thermal treatment process for die steel H13 of automobile forged piece | |
| CN102747316B (en) | Salt bath nitriding pre-treatment and gas nitriding complex heat treatment process of anti-corrosion stainless steel parts | |
| CN102321795B (en) | Heat treatment method for high ferrochrome roll requiring stepped hardness of roll body | |
| CN108118283A (en) | A kind of surface peening heat treatment method for improving hardness gradient | |
| CN111139345A (en) | Heat treatment method of steel | |
| CN110438319B (en) | Heat treatment method of sliding block | |
| CN101775571B (en) | Process for producing large-scale diesel engine cam workpiece with high hardness and abrasive resistance | |
| CN111187899A (en) | Gear heat treatment process | |
| JP7163642B2 (en) | Carburizing and quenching equipment and carburizing and quenching method | |
| CN109023221B (en) | The heat treatment method of aero-engine blade mounting base | |
| JP4876668B2 (en) | Heat treatment method for steel members | |
| CN103103321A (en) | Isothermal quenching process | |
| CN107245691B (en) | Surface strengthening method for metal material composite heat treatment | |
| CN102181613B (en) | Heat treatment method for large-scale Cr12Mov workpiece | |
| CN113817979B (en) | Method for preparing ultra-thick nitriding/carbon layer through permeation-annealing cycle | |
| CN109183045A (en) | A kind of heat treatment process of vehicle spindle | |
| CN104404443A (en) | Carburizing process for bearing part of wagon | |
| CN104213070A (en) | Control process for carburized layer of sewing machine gear | |
| EP2712939B1 (en) | Multimedia quench system and process | |
| CN112251712A (en) | Carburizing treatment method for medium-carbon low-alloy steel | |
| CN115109899A (en) | Heat treatment process of low-carbon alloy steel material | |
| CN112025231B (en) | Machining process for machining cutter | |
| CN107937862A (en) | A kind of carburization process for chain production | |
| CN112708734A (en) | Heat treatment process for improving wear resistance |
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 | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Yihua Inventor after: Han Bin Inventor after: Liu Yanchao Inventor after: Chen Quande Inventor after: Meng Fantao Inventor after: Gao Gongru Inventor after: Yang Dabo Inventor before: Liu Yanchao Inventor before: Chen Quande Inventor before: Meng Fantao Inventor before: Han Bin Inventor before: Yang Dabo Inventor before: Gao Gongru |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LIU YANCHAO CHEN QUANDE MENG FANTAO HAN BIN YANG DABO GAO GONGRU TO: ZHANG YIHUA HAN BIN LIU YANCHAO CHEN QUANDE MENG FANTAO GAO GONGRU YANG DABO |
|
| PP01 | Preservation of patent right |
Effective date of registration: 20160616 Granted publication date: 20130717 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20161216 Granted publication date: 20130717 |
|
| PP01 | Preservation of patent right |
Effective date of registration: 20161216 Granted publication date: 20130717 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170616 Granted publication date: 20130717 |
|
| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20170616 Granted publication date: 20130717 |
|
| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20200616 Granted publication date: 20130717 |
|
| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20200616 Granted publication date: 20130717 |
|
| PP01 | Preservation of patent right |