Heat treatment method of sliding block
A heat treatment method and slider technology, applied in the field of heat treatment, can solve the problems of reducing the fatigue resistance of sliders, grinding cracked carburized layers, and shortening service life, so as to reduce the generation of black structures, improve carburizing quality, and improve The effect of cooling rate
Active Publication Date: 2019-11-12
厦门真冈热处理有限公司
View PDF5 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The existing carburizing and quenching methods have the following shortcomings: the main structural defect of the carburized layer is the abnormality of the structure, and there are reticular cementite and black structure, which are easy to cause grinding cracks and The risk of peeling off the carburized layer when the slider is working; the existence of black tissue reduces the fatigue resistance of the slider and shortens the service life
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0028] Such as figure 1 As shown, a heat treatment method for a slider includes the following:
[0029] 1) In the preheating stage, the temperature of the carburizing furnace is raised to 920°C±5°C, and the slider is placed in the carburizing furnace. The preheating time is 20 minutes. The austenite structure with high solubility is followed by carburizing gas, so that the surface of the obtained carburized structure will be more uniform;
[0030] 2) In the carburizing stage, the temperature of the carburizing furnace is kept at 920°C±5°C, and a carburizing agent is introduced into the carburizing furnace to form a carburizing atmosphere. The time of the carburizing stage is 640 minutes, and the carburizing stage Including the strong infiltration stage and the diffusion stage, the carbon potential CP of the strong infiltration stage is 1.15%, and the carbon potential CP of the diffusion stage is 1.0%; the carbon potential from the strong infiltration stage to the diffusion st...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a heat treatment method of a sliding block. The method comprises steps as follows: preheating stage: after a carburizing furnace is heated to 920 DEG C plus or minus 5 DEG C, the sliding block is placed in the carburizing furnace, and the preheating time is 20 min; carburizing stage: strong carburizing potential is 1.15%, carburizing time is 540 min, diffusion carburizing potential is 1.0%, and the carburizing time is 100 min; carbonitriding stage: the carburized sliding block is cooled to 840 DEG C, carbon potential is adjusted to be 0.9%, meanwhile, ammonia gas is introduced with ammonia gas flow of 4-6 L / min, and temperature equalization is performed for 30 min; quenching stage: the sliding block is placed in an oil tank with oil temperature of 70 DEG C and subjected to medium-speed stirring and quenching, and quenching time is 30 min; tempering stage: the quenched sliding block is tempered at 180 DEG C for 2 h. According to the method, the surface harness ofthe sliding block obtained by first carburizing and later carbonitriding is 62-64 HKC, the thickness of a carburized layer is larger than or equal to 1.2 mm, the surface hardness is much higher thanthat of the sliding block obtained by single carburizing heat treatment, besides, abnormality of a carburized structure is eliminated, and high wear resistance, high fatigue resistance and high corrosion resistance of the sliding block can be realized.
Description
technical field [0001] The invention relates to a heat treatment method, which belongs to the technical field of heat treatment, in particular to a heat treatment method of a slider. Background technique [0002] Sliders are mainly used in linear guide rails, and are also widely used in many fields such as micro machine tools, precision measuring instruments, automated machinery, medical equipment, and manipulators. The slider needs to be heat-treated to make it have high precision, low noise, high wear resistance and excellent high-speed performance. [0003] At present, the most important method of strengthening heat treatment on the surface of the slider is carburizing and quenching. The existing carburizing and quenching methods have the following disadvantages: the main structural defect of the carburized layer is the abnormality of the structure, and there are reticular cementite and black structure, which are easy to cause grinding cracks and The danger of peeling o...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/18C23C8/34C23C8/80
CPCC21D1/18C21D9/0068C23C8/34C23C8/80
Inventor 胡大维张雪梅胡敬华
Owner 厦门真冈热处理有限公司