Preparation method of anti-falling DLC coating on surface of steel part
A technology for anti-shedding and steel parts, which is applied to the device for coating liquid on the surface, coating, pretreatment surface, etc. It can solve the problems of low bonding strength between the film and the workpiece, affecting the cleanliness of the workpiece, and low friction coefficient. Achieve the effect of improving bonding stability, avoiding partial shedding, and low cost
Pending Publication Date: 2022-07-15
CHONGQING HONGJIANG MACHINERY
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Although the diamond-like carbon film has excellent properties such as high hardness and elastic wear, low friction coefficient, excellent wear resistance and corrosion resistance, but because of the bond-to-bond combination, there will be some residual stress inside, so the film The bonding strength with the workpiece is not high
When the DLC layer falls off, the fallen DLC layer not only means that the cleanliness and life of the workpiece will be affected, but it will also cause the piston to get stuck during the movement, resulting in a series of serious consequences
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 Construction
[0020] The present invention will be described in detail below with reference to the accompanying drawings.
[0021] A preparation method of anti-stripping DLC coating on the surface of a steel part, which comprises the following steps:
[0022] S1, hardening heat treatment, the steel material is 18CrNiMo7-6, placed at a temperature of 850 ° C for 2 hours at a constant temperature, and then placed at a tempering temperature for 3 hours at a constant temperature to ensure the formation of the molecular structure of the steel and improve the overall hardness of the steel.
[0023] S2, stress relief and aging treatment, place the steel part at a temperature of 380°C for a period of time to fully release the internal stress of the steel part. Observing the surface of the steel after stress relief aging treatment, it can be seen that an oxide film has begun to form on the surface. This oxide film is an unstable film for the DLC coating. The existence of the oxide film will cause ...
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
Login to View More Abstract
The invention discloses a preparation method of an anti-falling DLC (diamond-like carbon) coating on the surface of a steel part, which comprises the following steps: S1, carrying out hardening heat treatment to improve the overall hardness of the steel part; s2, stress relief aging treatment is conducted, and internal stress of the steel part is released; s3, polishing treatment is carried out; s4, vibration finishing treatment is conducted, and an oxidation film on the surface of the steel part is removed; and S5, spraying treatment is conducted, specifically, the surface of the steel part is coated with a DLC coating. The binding force between the DLC coating and the surface of the steel part can be improved, and the stability of the DLC coating is improved.
Description
technical field [0001] The invention relates to a surface treatment process of a steel part, in particular to a preparation method of an anti-drop-off DLC coating on the surface of a steel part. Background technique [0002] With the development of the motor vehicle industry, the engine is the main source of power during the operation of the motor vehicle. Roller products are widely used in motor vehicle engines, and the requirements for roller pins are gradually increasing, especially the performance on the functional surface, because this performance determines the life of the cam system. Roller pins often require high surface hardness, anti-seize force, high wear resistance, low friction coefficient, etc. Therefore, DLC, the diamond-like carbon coating technology, has been gradually applied to roller pins. [0003] Although the diamond-like carbon film has excellent properties such as high hardness and elastic wear, low friction coefficient, excellent wear resistance an...
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 IPC IPC(8): B05D7/14B05D7/24B05D3/12C21D6/00C21D1/00
CPCB05D7/14B05D7/24B05D3/12C21D6/004C21D1/00B05D2202/10
Inventor 宋代骄唐松焦泽钧甘勇李东斌黎大勇凌泽远王弢
Owner CHONGQING HONGJIANG MACHINERY