High-plasticity steel for needle valve body of ultrahigh-pressure common-rail fuel injection system of diesel engine
A technology of fuel injection system and high plasticity steel, which is applied in the field of alloy steel, can solve the problems of unfavorable industry safety and national defense security, and the lack of diesel engines, etc., and achieve the effects of excellent cutting performance, improved impact energy and good fatigue performance
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[0011] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0012] The steel for the needle valve body of the ultra-high pressure common rail fuel injection system for diesel engines is characterized in that, by weight percentage, it includes: 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 ultra-high pressure common rail fuel injection system of diesel engine, including by weight p...
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