High plasticity steel for needle valve body of ultra-high pressure common rail fuel injection system of diesel engine

A fuel injection system and high plasticity steel technology, applied in the field of alloy steel, can solve the problems of no diesel engine, unfavorable industrial safety and national defense safety, etc., and achieve the effects of good fatigue performance, excellent machining performance, and good brittle cracking performance.

Active Publication Date: 2021-09-03
JIANGSU WUXI TRANSPORTATION HIGHER VOCATIONAL & TECH SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes my country's diesel engine fuel injection system follow foreign technology from design to production and use, and there is no diesel engine production with completely independent intellectual property rights, which leads to my country's diesel engine technology being completely controlled by foreign countries, which is not conducive to my country's industry safety and national defense security.

Method used

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Embodiment Construction

[0011] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0012] Steel for needle valve body of ultra-high pressure common rail fuel injection system for diesel engine, characterized in that, by weight percentage, it comprises: C 0.2~0.6%, Si 0.6~1.3%, Mn 0.2~0.8%, S≤0.05%, P≤ 0.025%, Cr 4.0-6.5%, V 0.8-1.3%, Mo 0.30-0.45%, Ti 0.08-0.12%, N 0.005-0.050%, and the balance is Fe.

[0013] High plasticity steel for needle valve body of diesel engine ultra-high pressure common rail fuel injection system, including by weight...

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PUM

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Abstract

The present invention proposes a high plasticity steel for a needle valve body of an ultra-high pressure common rail fuel injection system for a diesel engine, comprising: C 0.2%, Si 0.6%, Mn 0.2%, S 0.05%, P 0.025%, Cr 4.0% by weight percentage , V 0.8%, Mo 0.30%, Ti 0.08%, N 0.005%, and the balance is Fe. The invention greatly improves the impact energy, has excellent cutting performance and good brittle cracking performance, and at the same time has good plastic stability and good fatigue performance, and is especially suitable for the production of steel for needle valve bodies.

Description

technical field [0001] The invention relates to the technical field of alloy steel, in particular to a high plasticity steel for a needle valve body of an ultra-high pressure common rail fuel injection system of a diesel engine. Background technique [0002] The diesel engine common rail fuel injection technology has undergone three generations of development since its invention in 1986. It has achieved rapid development in the invention of electronic control, mechanical control, and material processing. At present, the technology has been successfully powered by diesel engines abroad. It is an inevitable trend of the world automobile industry to meet the increasingly strict exhaust emission standards. my country started a little late in this technology, and the cooperation of the entire industrial chain is poor. In recent years, large state-owned enterprises such as FAW have begun to increase investment and have made great progress in design and processing. [0003] The co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/24C22C38/22C22C38/28C22C38/60C21D8/06F02M61/10
CPCC21D8/065C22C38/02C22C38/04C22C38/22C22C38/24C22C38/28C22C38/001C22C38/60F02M61/10
Inventor 张俊
Owner JIANGSU WUXI TRANSPORTATION HIGHER VOCATIONAL & TECH SCHOOL
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