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

Refined martensitic alloy for internal combustion engine valves and production technology thereof

A technology of internal combustion engine and martensite, which is applied in the field of refined martensite alloy for internal combustion engine valves and its production process, can solve the problems of heat-resistant steel with many alloy elements, complex production process, and high production cost, so as to save energy, Improve the mechanical properties and save the effect of secondary heating

Active Publication Date: 2012-01-11
JIANGSU XINGHAI SPECIAL STEEL
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

JIS SUH is currently used internationally 4 B (that is, American XB) heat-resistant steel is used to make internal combustion engines and exhaust valves. Due to the defects of poor high-temperature plasticity and obvious temper brittleness, the steel ingots have high scrap rates during cold drawing and straightening processes, resulting in production failures. higher cost
[0005] The U.S. patent provides a high-carbon martensitic heat-resistant steel, which is JIS SUH in the JISG4311 standard 4 B (that is, American XB) position basis, some components have been adjusted, but the adjusted heat-resistant steel has many alloy elements and high content, so it will inevitably lead to high cost and complicated production process. The heat-resistant steel introduced in this patent The steel is suitable for the valve seat of the internal combustion engine, and there is no introduction for the steel to make the exhaust valve of the 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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Refined martensitic alloy for gas valves of internal combustion engines; the specific chemical composition of the alloy is: C 0.80; Mn 1.20; P 0.029; Si 0.83; S 0.018; Cr 16.80; Mo 2.20; V 0.32; For Fe and unavoidable impurities.

[0033] The production process steps of the refined martensitic alloy for the internal combustion engine valve mainly include:

[0034] (1) Vacuum induction furnace, bottom blowing argon refining: the raw materials are in the vacuum induction furnace, the temperature is 1500-1520 ℃, the raw materials are melted in the furnace, and the bottom blowing argon refining process is adopted to remove the oxide impurities of the raw materials, and reduce the The gas pressure in the furnace makes the content of oxygen, nitrogen and hydrogen in the steel drop significantly;

[0035] (2) Continuous casting and rolling: the melted steel enters the continuous casting tundish, opens the nitrogen flow to heat the storage heat exchanger, forms a nitrogen flow...

Embodiment 2

[0042] Refined martensitic alloy for gas valves of internal combustion engines; the specific chemical composition of the alloy is: C 0.86; Mn 1.31; P 0.029; Si 0.89; S 0.017; Cr 17.81; Mo 2.32; For Fe and unavoidable impurities.

[0043] The production process steps of the refined martensitic alloy for the internal combustion engine valve mainly include:

[0044] (1) Vacuum induction furnace, bottom blowing argon refining: the raw materials are in the vacuum induction furnace, the temperature is 1500-1520 ℃, the raw materials are melted in the furnace, and the bottom blowing argon refining process is adopted to remove the oxide impurities of the raw materials, and reduce the The gas pressure in the furnace makes the content of oxygen, nitrogen and hydrogen in the steel drop significantly;

[0045] (2) Continuous casting and rolling: the melted steel enters the continuous casting tundish, opens the nitrogen flow to heat the storage heat exchanger, forms a nitrogen flow to heat...

Embodiment 3

[0052] Refined martensitic alloy for gas valves of internal combustion engines; the specific chemical composition of the alloy is: C 0.90; Mn 1.43; P 0.029; Si 0.93; S 0.016; Cr 18.80; Mo 2.53; V 0.58; For Fe and unavoidable impurities.

[0053] The production process steps of the refined martensitic alloy for the internal combustion engine valve mainly include:

[0054] (1) Vacuum induction furnace, bottom blowing argon refining: the raw materials are in the vacuum induction furnace, the temperature is 1500-1520 ℃, the raw materials are melted in the furnace, and the bottom blowing argon refining process is adopted to remove the oxide impurities of the raw materials, and reduce the The gas pressure in the furnace makes the content of oxygen, nitrogen and hydrogen in the steel drop significantly;

[0055] (2) Continuous casting and rolling: the melted steel enters the continuous casting tundish, opens the nitrogen flow to heat the storage heat exchanger, forms a nitrogen flow...

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
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
reduction of areaaaaaaaaaaa
Login to View More

Abstract

The invention provides a refined martensitic alloy for internal combustion engine valves and a production technology thereof. The alloy is characterized by comprising the following chemical components by weight percent: 0.80-0.90 of C; 1.20-1.43 of Mn; 0.029 of P; 0.83-0.93 of Si; 0.016-0.018 of S; 16.80-18.80 of Cr; 2.20-2.53 of Mo; 0.32-0.58 of V; 0.13-0.19 of Re; and the balance Fe as well as inevitable impurities. The production technology consists of the steps of: vacuum induction furnace and bottom blowing argon refining, continuous casting and rolling, annealing, straightening and polishing. With rational component design, the refined alloy for internal combustion engine valves has good wear resistance, antioxidation and anti-high temperature corrosion performances. And after annealing, the alloy has a basically uniform tempered sorbite structure, which is dispersed in lumps with a particle size of less than 10 micrometers. Thus, the overall performance of the alloy provided in the invention is superior to congeneric martensitic alloys of other grades for valves.

Description

technical field [0001] The invention relates to the field of martensitic heat-resistant steel, in particular to a refined martensitic alloy for an internal combustion engine valve and a production process thereof. Background technique [0002] Air valve steel is the main material for making engine intake and exhaust valves. It is widely used in large, medium and small engines. It is a key component of the engine. Because of its extremely harsh working conditions, it must have high high temperature performance and wear resistance. and corrosion resistance. Therefore, the study of materials with both high temperature resistance and corrosion resistance is one of the most urgent problems to be solved in the valve steel industry. [0003] At present, because there are no new high-temperature wear-resistant and corrosion-resistant materials in China, pure high-temperature-resistant alloy steel and simple wear-resistant materials are often used. Although the former has good high-...

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 Applications(China)
IPC IPC(8): C22C38/24
Inventor 刘庄根计建康邱爱华孙建平陈来勇
Owner JIANGSU XINGHAI SPECIAL STEEL
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