CN101880816A

CN101880816A - Chilled tappet

Info

Publication number: CN101880816A
Application number: CN 201010202733
Authority: CN
Inventors: 张勃
Original assignee: YIZHENG HUACHENG INTERNAL COMBUSTION ENGINE FITTINGS FACTORY
Current assignee: YIZHENG HUACHENG INTERNAL COMBUSTION ENGINE FITTINGS FACTORY
Priority date: 2010-06-18
Filing date: 2010-06-18
Publication date: 2010-11-10

Abstract

The invention discloses a chilled tappet, which is made of elements such as iron, silicon, arsenic and the like and contains the following elements by weight percent: 3.4 to 3.7 percent of C, 1.7 to 2.2 percent of Si, 0.7 to 0.9 percent of Mn, 0.35 to 0.5 percent Cr, 0.2 to 0.4 percent of Mo, 0.05 to 0.1 percent of As, 0.015 to 0.025 percent of Se and the balance of iron and trace impurities. Compared with the traditional chilled tappet, the metallographic structure of the chilled tappet added with trace metals, arsenic and selenium is finer (grade 1-2), the point graphite is less (grade 2) and the Vickers hardness can reach above 850HV1. Thereby, the invention has the advantages that the wear resistance is high, the anti-fatigue effect is better and the service life is improved by more than one time.

Description

A kind of chilled tappet

Technical field

The invention belongs to the automobile component field, particularly a kind of chilled tappet.

Background technology

Develop rapidly along with Domestic Automotive Industry, people propose more and more higher requirement to dynamic property, the economy of motor car engine, impel motor car engine to strengthen, at a high speed, low oil consumption, low blowdown direction develop, thereby also the component product proposed requirements at the higher level.Tappet is as one of motor car engine key components and parts, and improving its hardness and wear-resisting, corrosion resistance nature is the target that each manufacturing firm is pursued.But toughness deficiency, not wear-resistant, the antifatigue weak effect of chilled tappet on the market easily rupture now, can not satisfy the demand of present automobile industry high speed development.

Summary of the invention

Technical problem solved by the invention is to provide the engine cold shock tappet of a kind of more wear-resistant, antifatigue better effects if, longer service life.

The technical solution that realizes the object of the invention is: a kind of chilled tappet, composition and weight percent thereof are: C:3.4-3.7%, Si:1.7-2.2%, Mn:0.7-0.9%, Cr:0.35-0.5%, Mo:0.2-0.4%, AS:0.05-0.1%, Se:0.015-0.025%, all the other are iron and trace impurity.

The present invention compared with prior art, its remarkable advantage is: the chilled tappet that adds behind micro-metals arsenic and the selenium is compared with original chilled tappet, metallographic structure finer and closely woven (1-2 level), point graphite be (2 grades) still less, after the pulse nitrogenize, its Vickers' hardness more can be up to more than the 850HV1, and therefore more wear-resistant, antifatigue better effects if, its work-ing life have improved more than 1 times.

Embodiment

A kind of chilled tappet of the present invention, its composition and weight percent thereof are: C:3.4-3.7%, Si:1.7-2.2%, Mn:0.7-0.9%, Cr:0.35-0.5%, Mo:0.2-0.4%, AS:0.05-0.1%, Se:0.01 5-0.025%, all the other are iron and trace impurity.The weight percent of chilled tappet is preferably: C:3.4-3.6%, and Si:1.7-2.0%, Mn:0.8-0.9%, Cr:0.4-0.5%, Mo:0.2-0.4%, AS:0.1%, Se:0.020%, all the other are iron and trace impurity.

The chilled tappet that adds behind micro-metals arsenic and the selenium is compared with original chilled tappet, metallographic structure finer and closely woven (1-2 level), point graphite be (2 grades) still less, after the pulse nitrogenize, its Vickers' hardness more can be up to more than the 850HV1, and therefore more wear-resistant, antifatigue better effects if, its work-ing life have improved more than 1 times.

Below in conjunction with embodiment the present invention is done further detailed description:

Embodiment 1:

The weight percent of chilled tappet consists of: C:3.4%, and Si:1.7%, Mn:0.7%, Cr:0.35%, Mo:0.2%, AS:0.05%, Se:0.015%, all the other are iron and trace impurity.

Embodiment 2:

The weight percent of chilled tappet consists of: C:3.6%, and Si:2.0%, Mn:0.8%, Cr:0.4%, Mo:0.4%, AS:0.1%, Se:0.2%, all the other are iron and trace impurity.

Embodiment 3:

The composition of chilled tappet and weight percent thereof are: C:3.7%, and Si:2.2%, Mn:0.9%, Cr:0.5%, Mo:0.4%, AS:0.1%, Se:0.025%, all the other are iron and trace impurity.

Embodiment 4:

The composition of chilled tappet and weight percent thereof are: C:3.5%, and Si:2.0%, Mn:0.8%, Cr:0.4%, Mo:0.3%, AS:0.07%, Se:0.019%, all the other are iron and trace impurity.

Claims

1. chilled tappet, it is characterized in that, the composition of this chilled tappet and weight percent thereof are: C:3.4-3.7%, Si:1.7-2.2%, Mn:0.7-0.9%, Cr:0.35-0.5%, Mo:0.2-0.4%, AS:0.05-0.1%, Se:0.015-0.025%, all the other are iron and trace impurity.

2. chilled tappet according to claim 1, it is characterized in that, the composition of chilled tappet and weight percent thereof are: C:3.4-3.6%, Si:1.7-2.0%, Mn:0.8-0.9%, Cr:0.4-0.5%, Mo:0.2-0.4%, AS:0.1%, Se:0.020%, all the other are iron and trace impurity.