JPH0437251U

JPH0437251U -

Info

Publication number: JPH0437251U
Application number: JP7732890U
Authority: JP
Priority date: 1990-07-19
Filing date: 1990-07-19
Publication date: 1992-03-30

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す断面図、第２図
は従来例を示す断面図である。１０……スキツドパイプ、２０……スキツドボ
タン、３０……不定形耐火物層。 FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional example. 10... skidded pipe, 20... skidded button, 30... monolithic refractory layer.

Claims

[Scope of Claim for Utility Model Registration] 1. In a skid beam constituting a walking beam in a steel heating furnace, in which a skid button is fixed in contact with a skid pipe, and a monolithic refractory layer is coated on the circumferential surface of the pipe, The skid button fixed on the top surface has a height H from the bottom surface to the top surface of 150 mm.
mm or more, and the height P of the part protruding upward from the monolithic refractory layer is 90 mm or more, and the skid button has 60 to 95% Cr by weight.
It has a chemical composition in which 0.8% by weight or less of C and 5% by weight or less of Si are allowed to be present, and the balance is substantially Fe, and has a melting point of 1600°C or more, and an average crystal grain size. Cr-Fe with a diameter of 50 μm or more
A skid beam for a steel heating furnace characterized by being a block made of an alloy. 2. The skid button in claim 1 is made of Cr6
0 to 95% by weight, and W: 10% by weight or less, M
o: 10% by weight or less, Nb: 10% by weight or less, T
a: 10% by weight or less, Hf: 10% by weight or less, C
o: 10% by weight or less, Ni: 10% by weight or less, T
Contains one or more elements selected from the group: i: 10% by weight or less, rare earth elements: 10% by weight or less, Al: 10% by weight or less, V: 10% by weight or less, Mn: 10% by weight or less. and C is 0.8% by weight
Hereinafter, a chemical composition in which Si is allowed to be mixed in an amount of 5% by weight or less, and the balance is substantially Fe, and 160% by weight or less is allowed.
Has a melting point of 0°C or higher and an average crystal grain size of 50 μm
A skid beam for a steel heating furnace, characterized in that it is a block made of the above Cr--Fe alloy. 3. The skid button in claim 1 is made of Cr6
0 to 95% by weight, C is allowed to be mixed in an amount of 0.8% by weight or less, Si is allowed to be present in an amount of 5% by weight or less, and the balance is substantially Fe, and the temperature is 1600°C.
For steel heating furnaces, the block is made of an alloy having a composite structure of a metal matrix having a melting point of 50 μm or more and a ceramic dispersed phase that accounts for 40% by volume or less. skid beam. 4. The skid button in claim 1 is made of Cr6
0 to 95% by weight, and W: 10% by weight or less, Mo
: 10% by weight or less, Nb: 10% by weight or less, Ta
: 10% by weight or less, Hf: 10% by weight or less, Co
: 10% by weight or less, Ni: 10% by weight or less, Ti
: 10% by weight or less, rare earth elements: 10% by weight or less, Al: 10% by weight or less, V: 10% by weight or less,
Mn: Contains one or more elements selected from the group of 10% by weight or less, C is allowed to be present in an amount of 0.8% by weight or less, Si is allowed to be present in an amount of 5% by weight or less, and the remainder is substantially Fe. chemical composition, and 1600
It has a melting point of ℃ or more and an average crystal grain size of 50 μm
A skid beam for a steel heating furnace, characterized in that it is a block made of an alloy having a composite structure of the metal matrix as described above and a ceramic dispersed phase occupying 40% by volume or less.