Refractory Cr-base alloy

A technology of superalloy and chemical composition, applied in the field of high temperature parts of heating furnace, can solve the problems of poor oxidation resistance, low limit height, low high temperature strength, etc., and achieve the effect of stable structure, excellent high temperature strength and oxidation resistance

Inactive Publication Date: 2004-05-26
马华政
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, the biggest disadvantage of cobalt-based superalloys is that the high-temperature strength above 1250°C is too low and the oxidation resistance is extremely poor. Therefore, the limit height of heat-resistant pads made of cobalt-based alloys is low, usually only 100 ~120mm or less

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Refractory Cr-base alloy
  • Refractory Cr-base alloy
  • Refractory Cr-base alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] According to the chemical composition and production method of the present invention, 5 furnaces of chromium-based superalloys are smelted on an induction furnace. Its specific chemical composition is shown in Table 1. After smelting, the alloys of the 5 furnaces were all made into parts according to a specific process, and samples were taken at the same time, and the high temperature compression test, high temperature oxidation test and vulcanization test were carried out respectively. The results are listed in Table 2 and Table 3.

[0027] For comparison, a furnace of cobalt-based alloy PGUMCo-50 alloy was smelted under the same process conditions. The same test items were also carried out separately. Its chemical composition and various test results are also listed in the corresponding Table 1, Table 2 and Table 3.

[0028] The compression test is carried out on a high-temperature compression testing machine. The diameter of the sample is φ30mm, and the height is h 1 It ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
heightaaaaaaaaaa
Login to view more

Abstract

A high-temp Cr-base alloy used for refractory parts of heater contains C (0.01-0.5 wt.%), Si (0-2), Mn (0-2), W (10.1-18), Fe (10.1-30), Mo (0-3), Al (0-2), Ti (0-1.5) and Cr (rest). Its advantages are high smelting point, stable microscopic structure, and excellent high-temp strength and resistance to oxidation and hot corrosion.

Description

Technical field [0001] The invention belongs to the field of chromium-based alloys, and mainly relates to high-temperature parts of a heating furnace. Background technique [0002] At present, walking beam heating furnaces have become the mainstream heating equipment for billet heating before rolling in rolling mills in industrialized countries. Skid buttons protruding upward on the bottom support beams in such furnaces are key components of the heating furnace. They work under the extreme high temperature of 1300~1450℃ and the severe working conditions of oxidation-sulfurizing atmosphere, and play the role of supporting and transferring the heated billet. [0003] In the prior art, cobalt-based high-temperature alloys are commonly used to manufacture heat-resistant spacers, such as PGUMCO-50 ("COBALT" 1973.3) and KHP-40CM (Japanese Patent Publication No. 52-20319). As we all know, the biggest disadvantage of cobalt-based superalloys is that the high temperature strength above 12...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/06C22C29/06
Inventor 马华政马燕宁
Owner 马华政
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap