Patent ID: 6321953
Filing Date: 2001-11-27
Classification: B22D,Y10T

Abstract:
A composite immersion nozzle, comprising:a main body of a first material, said main body having a hole inside;an inner side covering at least part of said hole of said main body, said inner side made of a second material having higher thermal expansion coefficient than that of the first material,wherein the ratio of the thickness of the inner side to a total thickness of the composite immersion nozzle is less than 25%, said inner side is in direct contact with said main body, wherein bending strength and modulus of elasticity of the main body or the inner side covering of the nozzle satisfy the following relation:0.7.times.10.sup.-3.ltoreq.(bending strength)/(modulus of elasticity).ltoreq.1.0.times.10.sup.-3, where the bending strength is determined by 3-point bending and the modulus of elasticity is measured by resonance method.