Preparation method of exhaust door

A technology of exhaust valves and raw materials, which is applied in the field of automotive machinery parts, can solve the problems of large heating area, large heating area of ​​the head, complex processing, etc., and achieve the effect of improving wear resistance and heat resistance

Inactive Publication Date: 2018-01-12
李林君
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spherical top valve is suitable for the exhaust valve, which has high strength, low exhaust resistance and good exhaust gas elimination effect, but it has a large heating area, large mass and ine

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 more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1

[0017] A method for preparing an exhaust valve, which is characterized in that it comprises the following steps: (1) smelting the raw materials and forging into a shape to obtain an exhaust valve blank; (2) straightening; (3) surface treatment: in the exhaust valve The end surface of the blank is nano-treated and polished and then the tapered surface is ground; (4) The end of the exhaust valve is surfacing alloy treatment; (5) Tempering treatment; (6) Nitriding treatment, (7) The tapered surface is polished .

[0018] The weight percentage composition of the raw materials is: 9% Cr, 15% Mn, 5% Ni, 5% N, and the rest is iron.

[0019] In step (4), the alloy in the surfacing alloy treatment is a titanium alloy.

[0020] The nitriding temperature is 360°C.

Example Embodiment

[0021] Example 2

[0022] A method for preparing an exhaust valve, which is characterized in that it comprises the following steps: (1) smelting the raw materials and forging into a shape to obtain an exhaust valve blank; (2) straightening; (3) surface treatment: in the exhaust valve The end surface of the blank is nano-treated and polished and then the tapered surface is ground; (4) The end of the exhaust valve is surfacing alloy treatment; (5) Tempering treatment; (6) Nitriding treatment, (7) The tapered surface is polished .

[0023] The weight percentage composition of the raw material is: 8% Cr, 18% Mn, 6% Ni, 3% N, and the rest is iron.

[0024] In step (4), the alloy in the surfacing alloy treatment is a titanium alloy.

[0025] The nitriding temperature is 450°C.

Example Embodiment

[0026] Example 3

[0027] A method for preparing an exhaust valve, which is characterized in that it comprises the following steps: (1) smelting the raw materials and forging into a shape to obtain an exhaust valve blank; (2) straightening; (3) surface treatment: in the exhaust valve The end surface of the blank is nano-treated and polished and then the tapered surface is ground; (4) The end of the exhaust valve is surfacing alloy treatment; (5) Tempering treatment; (6) Nitriding treatment, (7) The tapered surface is polished .

[0028] The weight percentage composition of the raw materials is: 10% Cr, 16% Mn, 5% Ni, 5% N, and the rest is iron.

[0029] In step (4), the alloy in the surfacing alloy treatment is a titanium alloy.

[0030] The nitriding temperature is 540°C.

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

No PUM Login to view more

Abstract

The invention discloses a preparation method of an exhaust door. The preparation method of the exhaust door comprises the following steps: (1) raw materials are smelted for forging to prepare an exhaust door blank (2) the straightening is performed; (3) surface treatment: after the nanometer polishing is performed on the end surface of the exhaust door blank, a conical surface is grinded; (4) thealloy overlaying is performed at the tail end of the exhaust door; (5) the tempering is performed; (6) the nitriding is performed; and (7) the conical surface is grinded after polishing. The surface treatment technology is combined with the terminal alloy overlaying technology to effectively improve the wear resistance and the heat resistance of the intake door.

Description

technical field [0001] The invention relates to the field of automobile mechanical parts, in particular to a method for preparing an exhaust valve. Background technique [0002] The function of the valve is to be responsible for inputting air into the engine and discharging the exhaust gas after combustion. From the structure of the engine, it is divided into intake valve and exhaust valve. The role of the intake valve is to draw air into the engine and mix it with fuel for combustion; the role of the exhaust valve is to discharge the burned exhaust gas and dissipate heat. [0003] The valve is composed of a valve head and a stem. The temperature of the valve head is very high (intake valve 570-670K, exhaust valve 1050-1200K), and it also bears the pressure of the gas, the force of the valve spring and the inertial force of the transmission component. The lubrication and cooling conditions are poor, and the valve must be It has certain strength, rigidity, heat resistance ...

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
no application Login to view more
IPC IPC(8): B23P15/00
Inventor 李林君
Owner 李林君
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap