Unlock instant, AI-driven research and patent intelligence for your innovation.

A high temperature resistant exhaust valve and its production method

A technology for exhaust valves and high temperature resistance, which is applied in the direction of machines/engines, mechanical equipment, engine components, etc., and can solve problems such as not being able to meet the development requirements of internal combustion engines

Active Publication Date: 2021-05-25
特冶(北京)科技发展有限公司
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current exhaust valve generally has a service life of 5000 hours, which cannot meet the future development requirements of this type of internal combustion engine.

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 high temperature resistant exhaust valve and its production method
  • A high temperature resistant exhaust valve and its production method
  • A high temperature resistant exhaust valve and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The present invention will be further described below in conjunction with specific embodiments, so as to help understand the contents of the present invention.

[0014] The high-temperature-resistant exhaust valve of the present invention is a super-iron-nickel alloy, the metallographic structure is austenite, the carbides on the valve disc are evenly distributed and not reticular, the grain size reaches grade 8, and its chemical composition is as follows by weight percentage: C 0.004-0.15, Si 0.40-1.20, Mn 0.50-1.0, Cr 20.5-25.0, Ni 30.5-35.0, Ti 2.5-3.0, Al 1.0-2.0, V 0.015-0.50, W 0.65-1.50, Mo 0.16-0.60, The rest is Fe.

[0015] The production process includes electric upsetting and heat treatment after electric upsetting, as follows:

[0016] (1) Electric upsetting: the mold heating temperature is 250-300°C, the die forging time is ≤5 seconds, the final forging temperature is ≥940°C, the garlic temperature after heading is 980-1020°C, and then air-cooled to room t...

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
yield strengthaaaaaaaaaa
hardnessaaaaaaaaaa
crystal sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-temperature-resistant exhaust valve. The metallographic structure is austenite, the carbides on the valve disc are evenly distributed and not in the form of a network, the grain size reaches grade 8, and the chemical composition by weight percentage is: C 0.004- 0.15, Si 0.40‑1.20, Mn 0.50‑1.0, Cr 20.5‑25.0, Ni 30.5‑35.0, Ti 2.5‑3.0, Al 1.0‑2.0, V 0.015‑0.50, W 0.65‑1.50, Mo 0.16‑0.60, the rest are Fe . The valve has good wear resistance and mechanical performance, can meet the requirements of the exhaust valve of diesel and gas internal combustion engines, and has the advantages of long service life.

Description

technical field [0001] The invention relates to an exhaust valve, in particular to a high temperature resistant exhaust valve. Background technique [0002] The exhaust valve of the valve train of an internal combustion engine is an important moving part of the engine, and it must bear high temperature, impact and friction, so its service conditions are harsh and the working environment is harsh. The exhaust valve must not only have high temperature strength and thermal stability, but also have excellent wear resistance, oxidation resistance and corrosion resistance to ensure air tightness and service life. [0003] The internal combustion engines of ships and generator sets use fuel other than diesel, heavy oil and various gas sources, such as gas and biogas. Compared with diesel, not only the combustion temperature is higher, but also the impurities contained are more abrasive. This type of internal combustion engine is characterized by strong power but high combustion te...

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): C22C30/00B21J5/00C22F1/00F01L3/02
CPCB21J5/002C22C30/00C22F1/00F01L3/02
Inventor 张志勇张绵胜
Owner 特冶(北京)科技发展有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com