CN102154652B - Medium-deep-layer carburization or carbonitriding thermal processing technology for bearings or clutch parts - Google Patents
Medium-deep-layer carburization or carbonitriding thermal processing technology for bearings or clutch parts Download PDFInfo
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- CN102154652B CN102154652B CN2011100596707A CN201110059670A CN102154652B CN 102154652 B CN102154652 B CN 102154652B CN 2011100596707 A CN2011100596707 A CN 2011100596707A CN 201110059670 A CN201110059670 A CN 201110059670A CN 102154652 B CN102154652 B CN 102154652B
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Abstract
The invention relates to a medium-deep-layer carburization or carbonitriding thermal processing technology for bearings or clutch parts. In the invention, the carburization or carbonitriding is carried on parts by utilizing a continuous production line of a carrier roller type mesh belt furnace with a controllable atmosphere, and the technology comprises the following steps in sequence: strong permeation, diffusion, quenching, cleaning, low-temperature tempering, discharging and air cooling. In the invention, the continuous production line of the carrier roller type mesh belt furnace with the controllable atmosphere is used for carrying out the medium-deep-layer carburization or carbonitriding, thus continuous production is realized, the production efficiency is improved, the productivity is increased, frequent opening and closing actions of a gap furnace can be reduced, non-oxidization treatment is realized, and the labor intensity is reduced; and in addition, carbon potentials in all areas of the mesh belt furnace are respectively controlled so as to guarantee the quality stability.
Description
Technical field
The present invention relates to the heat treatment technics field, the mid-deep strata carburizing or carbonitriding thermal treatment process of especially a kind of bearing or zero clutch parts.
Background technology
Carburizing is for the carbon content that increases the steel part top layer and certain carbon profile, and steel part is heated in carburizing medium and is incubated, and makes carbon atom infiltrate the chemical heat treatment process on top layer.Q-tempering after the carburizing can make piece surface hardness raising, wear-resisting, and good core toughness.Carbonitriding is to infiltrate nitrogen and carbon to workpiece surface, and is main thermal treatment process with the nitriding.Nitrided layer hardness is lower, and fragility is less.The major advantage workpiece deformation is little, not limited by steel grade.But the infiltration layer of carbonitriding is thinner, should not bear heavy lift.
Traditional carburizing or carbonitriding process using crack stove is produced, and the crack stove needs frequent opening and closing, and labor strength is high, and production efficiency is low, and quality is unstable.
Summary of the invention
The technical problem that the present invention will solve is: overcome the deficiency in the prior art; The mid-deep strata carburizing or carbonitriding thermal treatment process of a kind of bearing or zero clutch parts is provided, realizes continuous production, enhance productivity; Temperature and carbon potential are controlled, make constant product quality.
The technical solution adopted for the present invention to solve the technical problems is: the mid-deep strata carburizing or carbonitriding thermal treatment process of a kind of bearing or zero clutch parts; Adopt the roller-type meshbeltfurnace tinuous production of controlled atmosphere to carry out the carburizing or carbonitriding processing of component, step is following:
(1) ooze by force: at first in meshbeltfurnace, component are carried out oozing by force of carburizing or carbonitriding, keep furnace temperature 910 ± 10 ℃ of scopes, soaking time is 420-720min, and the carbon potential in the meshbeltfurnace is regulated in 1.0～1.3%CP;
(2) diffusion: in meshbeltfurnace, component are carried out the diffusion of carburizing or carbonitriding then; Control meshbeltfurnace temperature is reduced to 880 ± 10 ℃, and insulation 45-90min is cooled to 850 ± 10 ℃; Insulation 45-90min, the carbon potential in the meshbeltfurnace is regulated in 0.6～0.8%CP;
(3) quench: component directly carry out oil quenching at 850 ± 10 ℃, and oily temperature control is at 70 ± 5 ℃;
(4) clean: remove the component surface oil stain, rinse liquid temperature is controlled at 50 ± 10 ℃;
(5) tempering: carry out low-temperaturetempering, 180 ± 10 ℃ of control meshbeltfurnace temperature, time 150-200min;
(6) take out component, the air cooling of coming out of the stove.
The described quenching process of step (3) adopts quick bright quenc hing oil.
The invention has the beneficial effects as follows that the mid-deep strata carburizing or carbonitriding thermal treatment process of bearing of the present invention or zero clutch parts adopts controlled atmosphere roller-type meshbeltfurnace tinuous production to carry out mid-deep strata carburizing and carbonitriding, realizes continuous production; Enhance productivity, increase production capacity, reduce the frequent opening and closing action of crack stove; The realization non-oxidation is handled; Reduce labour intensity, and meshbeltfurnace respectively distinguishes carbon potential and control respectively, thereby it is stable to ensure the quality of products.Can reach 60～65HRC through the heat treated component surface hardness of this technology, core hardness 30～45HRC, uniformity of hardness ± 1HRC, hardened layer homogeneity ± 0.1mm, the microstructure surface can reach 2～4 grades, 2～3 grades of cores.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is the process diagram of the mid-deep strata carburizing or carbonitriding thermal treatment process of bearing of the present invention or zero clutch parts.
Embodiment
Combine accompanying drawing that the present invention is done further detailed explanation now.These accompanying drawings are the synoptic diagram of simplification, substruction of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
As shown in Figure 1; The most preferred embodiment of the mid-deep strata carburizing or carbonitriding thermal treatment process of bearing of the present invention or zero clutch parts; Mid-deep strata is infiltration layer 0.6～1.5mm; Adopt the roller-type meshbeltfurnace tinuous production of controlled atmosphere to carry out the carburizing or carbonitriding processing of component, step is following:
(1) ooze by force: at first in meshbeltfurnace, component are carried out oozing by force of carburizing or carbonitriding, keep furnace temperature 910 ± 10 ℃ of scopes, soaking time is 420-720min, and the carbon potential in the meshbeltfurnace is regulated in 1.0～1.3%CP;
(2) diffusion: in meshbeltfurnace, component are carried out the diffusion of carburizing or carbonitriding then; Control meshbeltfurnace temperature is reduced to 880 ± 10 ℃, and insulation 45-90min is cooled to 850 ± 10 ℃; Insulation 45-90min, the carbon potential in the meshbeltfurnace is regulated in 0.6～0.8%CP;
(3) quench: component directly carry out oil quenching at 850 ± 10 ℃, adopt quick bright quenc hing oil, and oily temperature control is at 70 ± 5 ℃;
(4) clean: remove the component surface oil stain, rinse liquid temperature is controlled at 50 ± 10 ℃;
(5) tempering: carry out low-temperaturetempering, 180 ± 10 ℃ of control meshbeltfurnace temperature, time 150-200min;
(6) take out component, the air cooling of coming out of the stove.
Component surface hardness through heat treated bearing of this technology or clutch coupling can reach 60～65HRC, and core hardness reaches 30～45HRC, uniformity of hardness ± 1HRC, and hardened layer homogeneity ± 0.1mm, the microstructure surface can reach 2～4 grades, 2～3 grades of cores.
Claims (2)
1. the mid-deep strata carburizing or carbonitriding thermal treatment process of bearing or zero clutch parts is characterized in that: the carburizing or carbonitriding that adopts the roller-type meshbeltfurnace tinuous production of controlled atmosphere to carry out component is handled, and step is following:
(1) ooze by force: at first in meshbeltfurnace, component are carried out oozing by force of carburizing or carbonitriding, keep furnace temperature 910 ± 10 ℃ of scopes, soaking time is 420-720min, and the carbon potential in the meshbeltfurnace is regulated in 0.6～1.3%CP;
(2) diffusion: in meshbeltfurnace, component are carried out the diffusion of carburizing or carbonitriding then; Control meshbeltfurnace temperature is reduced to 880 ± 10 ℃, and insulation 45-90min is cooled to 850 ± 10 ℃; Insulation 45-90min, the carbon potential in the meshbeltfurnace is regulated in 0.6～0.8%CP;
(3) quench: component directly carry out oil quenching at 850 ± 10 ℃, and oily temperature control is at 70 ± 5 ℃;
(4) clean: remove the component surface oil stain, rinse liquid temperature is controlled at 50 ± 10 ℃;
(5) tempering: carry out low-temperaturetempering, 180 ± 10 ℃ of control meshbeltfurnace temperature, time 150-200min;
(6) take out component, the air cooling of coming out of the stove.
2. the mid-deep strata carburizing or carbonitriding thermal treatment process of bearing as claimed in claim 1 or zero clutch parts is characterized in that: the described quenching process of step (3) adopts quick bright quenc hing oil.
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| CN102154652B true CN102154652B (en) | 2012-11-28 |
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Address after: 213000 Longxiang Road, Wujin high tech Development Zone, Changzhou City, Jiangsu Province Patentee after: Jiangsu Nanfang Precision Industry Co.,Ltd. Address before: 213164 No. 9, Longxiang Road, high tech Development Zone, Wujin District, Changzhou City, Jiangsu Province Patentee before: Jiangsu Nanfang Bearing Co.,Ltd. |
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