Method for processing anti-corrosive surface through oxidation
An oxidation treatment and anti-corrosion technology, applied in coatings, metal material coating processes, solid-state diffusion coatings, etc., can solve problems such as environmental hazards, increase production costs, and poor working condition stability, reduce pollution and facilitate production. , the effect of eliminating internal stress
Inactive Publication Date: 2013-04-17
严方
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] Due to the poor stability of high-power marine diesel engines and the use of seawater for cooling, the cavitation problem in the wall of the water jacket is more serious, and the failure of the cylinder liner is more common. In order to improve the cavitation resistance of the cylinder liner, the current The more commonly used methods are chemical treatment and painting of its parts, which not only increases the production cost of the product, but also causes certain harm to the environment.
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
[0008] The technical solution adopted by the present invention to solve the technical problem is: the casting blank of the cylinder liner is rough-machined, and the rough machining includes the rough-machined outer circle and the rough-machined inner hole. First, the outer circle of the cylinder liner blank is roughly machined, and then the outer circle Position and process the inner hole. When semi-finishing and semi-finishing the outer circle, the water jacket, skirt and other non-assembly parts are processed to the finished product requirements, and then tempered. The tempering requirement is not higher than 60°C per hour to 600°C-610°C. Keep warm for 4-5 hours, then cool down at no more than 30°C per hour to 220°C and take it out of the furnace to cool. The surface of the tempered cylinder liner produces an oxide layer. After tempering, the cylinder liner is finished, and the assembly size and inner hole of the assembly belt and shoulder are processed to meet the requirem...
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 relates to a method for processing an anti-corrosive surface through oxidation. The method comprises the following steps of carrying out crude machining and semifinishing machining on a cylinder sleeve; when the semifinishing machining is carried out on an outer circumference, machining unassembled parts, such as a water sleeve and a skirt part, to meet the requirements of finished products, and carrying out tempering process to generate an oxidized layer on the surface of the cylinder sleeve after the tempering process; and carrying out finish-machining on the tempered cylinder sleeve, and machining the assembly sizes of an assembly waistband, shoulder and the like and an inner hole to be matched with the requirements of the finished products, so that a water sleeve part of the cylinder sleeve does not need to be painted and does not need other chemical processes. The cylinder sleeve after the tempering process has reduced inner stress, the size of the assembled cylinder sleeve is stable, and the oxidized layer generated through the tempering step can prevent corrosion during transportation and storage and improves the cavitation erosion resistance during application.
Description
Technical field [0001] The invention relates to an anti-cavitation treatment method for a cylinder liner of a high-power marine diesel engine. Background technique [0002] Due to the poor stability of high-power marine diesel engines and the use of seawater for cooling, the cavitation problem in the wall of the water jacket is more serious, and the failure of the cylinder liner is more common. In order to improve the cavitation resistance of the cylinder liner, the current The more commonly used methods are chemical treatment and painting of its parts, which not only increases the production cost of the product, but also causes certain harm to the environment. Contents of the invention [0003] In order to improve the anti-cavitation ability of marine diesel engine cylinder liners, the present invention provides a heat treatment and machining process. Through this process, the large internal stress generated in the casting process and rough machining process can be elimin...
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): C23C8/14
Inventor 严方张加中
Owner 严方