Member for conveying high-temperature materials
A technology of high-temperature materials and components, applied in the direction of conveyor objects, metal material coating technology, thin material treatment, etc., can solve the problems of insufficient oxidation resistance, inappropriateness, low Cr, etc., and achieve excellent durability and remarkable effect , the effect of improving quality
Active Publication Date: 2012-09-12
NIPPON STEEL CORP
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Problems solved by technology
Since the Cr content of the mixed coating layer disclosed in Patent Document 16 is low, the oxidation resistance is not sufficient, and it is not suitable as a conveying roller for high-temperature materials above 1100°C.
Method used
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Effect test
Embodiment 1
[0085] First, mixed powders (Test Nos. 1 to 14) and alloy powders (Test No. 15) obtained by mixing alloy powders and carbide powders having the chemical compositions shown in Table 1 were prepared. Using these powders, a film with a thickness of 0.7 mm to 4.5 mm was formed on the surface of a base material made of Ni—Cr alloy by plasma powder surfacing method, as a test material. In order to confirm the effects of the present invention, the following tests were carried out on these test materials.
[0086] Lamination test
[0087] A cylindrical test piece (test material A) with a diameter of 20 mm and a length of 50 mm was cut out from each of the above test materials so that the surface on which the film was formed became the end face of the test piece. Cylindrical test piece (test material B) with a diameter of 20 mm and a length of 50 mm, the application figure 1 The testing machine shown is used for lamination tests.
[0088] figure 1 It is a schematic cross-sectiona...
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Abstract
Provided is a member for conveying high-temperature materials, which exhibits excellent build-up resistance, oxidation resistance, and heat crack resistance. Specifically provided is a member for conveying high-temperature materials, which has a coating on the surface of a base metal, said coating being a composite coating formed by a plasma build up spraying method using a mixed powder consisting of both a Co-base alloy powder that comprises, by mass, 0.03 to 0.6% of C, 0.2 to 3% of Si, 22 to 35% of Cr, and more than 50% of Co, and a Cr carbide powder. The member exhibits excellent build-up resistance, particularly in a gaseous atmosphere having a temperature of 1100 DEG C or higher.
Description
technical field [0001] The present invention relates to a component for conveying high-temperature materials suitable for supporting and conveying steel and other high-temperature materials heated by heat treatment, in particular to a conveying roller and skid button in a heat treatment furnace for conveying high-temperature materials member. Background technique [0002] In the process of manufacturing seamless pipes at the heat processing temperature and in the process of heat processing of other metal materials, for example, to transport raw materials or products for processing in a heat treatment furnace, or to heat these materials to a high temperature using a heat treatment furnace, etc. (hereinafter, Collectively referred to as "high-temperature materials."), many conveying members such as roller conveyors are used. [0003] When conveying a high-temperature material, for example, if slippage occurs between the high-temperature material and the conveying member, stic...
Claims
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IPC IPC(8): C23C24/10B23K9/04B23K10/02B65G39/00C21D1/00C22C19/07
CPCB23K9/04B23K10/027B23K2101/20B23K2101/38C21D1/06C21D6/002C21D6/007C21D6/02C21D9/0012C21D9/08C21D9/14C21D9/28C21D9/38C21D2251/02C21D2251/04C22C19/07C23C4/06Y10T428/12063
Inventor 西山佳孝河上忠司小野敏秀米山三树男辰巳佳宏
Owner NIPPON STEEL CORP