JPH0282759U

JPH0282759U -

Info

Publication number: JPH0282759U
Application number: JP16133488U
Authority: JP
Priority date: 1988-12-14
Filing date: 1988-12-14
Publication date: 1990-06-26

Description

[Brief explanation of drawings]

第１図は従来弁および本考案の一実施例のポペ
ツト弁の正面図、第２図は本実施例に係るポペツ
ト弁の半裁断模式図、第３図は本実施例のポペツ
ト弁の各部位におけるミクロ組織（結晶粒の大き
さ）を従来例と比較して示す図、第４図は耐熱合
金ＮＣＦ７５１の結晶粒度と８００℃疲労強度の
関係を示す図、第５図は本実施例弁のフエース面
の強度を従来弁と比較して示す図である。１０……傘部、１４……フエース、２０……芯
棒部、２４……頚部。 Fig. 1 is a front view of a conventional valve and a poppet valve according to an embodiment of the present invention, Fig. 2 is a half-cut schematic diagram of the poppet valve according to the present embodiment, and Fig. 3 is each part of the poppet valve of the present embodiment. Figure 4 is a diagram showing the relationship between the grain size and 800°C fatigue strength of the heat-resistant alloy NCF751, and Figure 5 is a diagram showing the relationship between the grain size and 800°C fatigue strength of the valve of this example. It is a figure which shows the strength of a face surface in comparison with a conventional valve. 10... umbrella part, 14... face, 20... core rod part, 24... neck part.

補正平１．２．２３図面の簡単な説明を次のように補正する。明細書第１１頁第１３行の「比較して示す図、
」を「比較して示す図面代用写真、」に改める。Amendment 1.2.23 Hei 1. The brief description of the drawing is amended as follows. “Diagrams showing comparison” on page 11, line 13 of the specification,
'' was changed to ``Photographs substituted for drawings for comparison.''

Claims

[Scope of utility model registration request]

In a mushroom-type poppet valve for exhaust consisting of an umbrella portion and a core rod portion, the crystal grain size of at least the neck region of the core rod portion is made coarse by solid solution treatment, and the crystal grain size of the face region of the umbrella portion is made fine by forging treatment. A pine room type poppet valve for exhaust.