Method for manufacturing 20CrMnTi gears
A gear and machining technology, applied in the field of gear manufacturing, to achieve the effects of small deformation, uniform structure, and improved crystal structure
Inactive Publication Date: 2016-10-05
重庆展申机械厂
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is a method for making 20CrMnTi gears, which can improve the crystal phase structure of the workpiece, so that the matrix structure of the workpiece is more uniform, and the subsequent carburizing and quenching process The amount of deformation is smaller to ensure the machining accuracy of the workpiece
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 moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0009] The invention discloses a method for manufacturing 20CrMnTi gears, comprising the following steps: forging billet → normalizing → machining → incomplete annealing → machining → carburizing and quenching → tempering → shot blasting.
[0010] The incomplete annealing process is under the protection of nitrogen, at the temperature of Ac1+45°C for 2.5 hours, and then cooled to 720°C with the furnace and then air-cooled.
[0011] The method can improve the crystal phase structure of the workpiece, make the matrix structure of the workpiece more uniform, and reduce the deformation amount in the subsequent carburizing and quenching process, thereby ensuring the machining accuracy of the workpiece.
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 method for manufacturing 20CrMnTi gears. The method includes the following processes of forging stock, normalizing, machining, incomplete annealing, machining, carburizing and quenching, tempering and shot blasting. The incomplete annealing process includes under protection of nitrogen performing heat preservation at the temperature of Ac1+(40-50) DEG C for 2.5 hours, and performing furnace cooling to 700-720 DEG C prior to air cooling. By the process for manufacturing the 20CrMnTi gears, internal stress of workpieces can be eliminated more thoroughly, the crystalline phase texture structure of the workpieces can be improved, matrix structure of the workpieces is more uniform, deformation in the subsequent carburizing and quenching process is smaller, and machining accuracy of the workpieces is guaranteed.
Description
technical field [0001] The invention belongs to the field of gear manufacturing, in particular to a method for manufacturing 20CrMnTi gears. Background technique [0002] In the cold working process of gears made of 20CrMnTi, in order to eliminate the internal stress of the workpiece, reduce the deformation of the workpiece and prevent the cracking of the workpiece, stress relief annealing at 500~600 °C is usually used for treatment. Although the internal stress of the workpiece can be removed to a certain extent by using the stress relief annealing process, the internal stress of the workpiece is not completely removed, and the matrix structure is not uniform enough, which makes the deformation of the workpiece difficult to control and denatured in the subsequent carburizing and quenching process of the processed gear. larger. [0003] In view of this, the present invention proposes a method for manufacturing 20CrMnTi gears. The manufacturing process of the 20CrMnTi carbur...
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): B23P15/14C21D9/32
Inventor 赵伟
Owner 重庆展申机械厂