Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A poppet valve with a surface-modified surface of the valve head using a ni-cr-co-based alloy with high-temperature corrosion resistance

一种耐高温腐蚀、表面改性的技术，应用在升阀、阀细节、阀装置等方向，能够解决涂敷层破裂、热冲击抵抗性低、剥离等问题，达到优秀高温腐蚀耐性、提高耐高温腐蚀特性的效果

Active Publication Date: 2017-03-15
FUKUKA METAL FOIL & POWDER CO LTD +1
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] However, in the coating using ceramics such as chromium carbide and yttria-stabilized zirconia, when the coating layer is peeled off, the hard ceramic bites between the valve and the valve seat, which may damage the valve and the valve seat.
[0021] In addition, in the high-Cr-based spraying materials shown in Patent Documents 9 to 15, since the Cr-rich solid solution forms a matrix, the resistance to thermal shock is low, and cracks and peeling may occur in the coating layer, and the desired coating cannot be obtained. Satisfactory aging resistance

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A poppet valve with a surface-modified surface of the valve head using a ni-cr-co-based alloy with high-temperature corrosion resistance
  • A poppet valve with a surface-modified surface of the valve head using a ni-cr-co-based alloy with high-temperature corrosion resistance
  • A poppet valve with a surface-modified surface of the valve head using a ni-cr-co-based alloy with high-temperature corrosion resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] The Example alloys of the present invention and Comparative Example alloys adjusted and blended as described above were smelted, the Charpy impact value was measured by the following method, and a high temperature corrosion test was carried out. In addition, evaluation of film properties after thermal spraying using alloy powder produced by a spray method was also carried out.

[0050] (1) Charpy impact test; use an electric furnace to heat a 100g billet with the composition of each alloy to about 1600°C in an argon flow, melt it, cast it into a shell mold, and machine it into a test piece recorded in JIS Z2242:2005 (no notch). Then, using a Charpy impact tester, an impact test based on JIS Z 2242:2005 was performed to measure an impact value.

[0051] It should be noted that, in Patent Documents 9 to 15, since alloys with a Cr content of more than 60% by mass cannot be melted in an electric furnace set at about 1600° C., comparative studies were abandoned (the patents...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

Provided are: a surface-coating material having excellent cracking resistance and peeling resistance and also having excellent high-temperature corrosion resistance properties; and a poppet valve coated with the surface-coating material. A Ni-Cr-Co-based alloy according to the present invention comprises 40.0 to 50.0 mass% of Cr, 10.0 to 20.0 mass% of Co, 0.5 to 5.0 mass% of Nb, 0.01 to 5.0 mass% of Fe and 0.1 to 3.0 mass% of Si, with the remainder being 26.0 to 40.0 mass% of Ni and unavoidable impurities. The Ni-Cr-Co-based alloy may additionally comprise one or more elements selected from Mo, W, Mn, Ti, Al, B and C in a total amount of 5.0 mass% or less, wherein the content of each of Ti and Al is 3.0 mass% or less and the content of each of B and C is 1.0 mass% or less. In the poppet valve according to the present invention, at least a face portion is coated with the Ni-Cr-Co-based alloy.

Description

technical field [0001] The present invention relates to materials for surface modification used in various construction processes such as high-velocity flame spraying, plasma spraying, PTA powder surfacing, and vapor deposition, and in particular to materials used in components requiring high-temperature corrosion resistance A Ni-Cr-Co alloy with high temperature corrosion resistance, and a surface-modified poppet valve using this alloy. Background technique [0002] Conventionally, in poppet valves that require high-temperature corrosion resistance, heat-resistant alloys are generally used as valve base materials. However, in recent years, the high-temperature corrosion environment has become more severe due to the deterioration of the fuel used and the high temperature of the combustion gas accompanying the increase in the output of the engine, and the service life of the valve has been shortened. That is, on the surface of the valve head of the suction valve and the exha...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/06C22C30/00
CPCC22C27/06C22C30/00F01L3/04F01L2303/00F01L2820/01F16K25/005F16K27/00
Inventor 乙部胜则西村信一仓桥一宪高桥佳弘
Owner FUKUKA METAL FOIL & POWDER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com