Smelting method based on nickel-based heat-resistance alloy

A smelting method and a nickel-based heat-resistant technology, applied in the field of alloy smelting methods, can solve the problems of high manufacturing cost, complex manufacturing, and poor heat resistance of alloys, and achieve the goals of reducing heat treatment deformation, increasing life, and improving lateral performance Effect

Inactive Publication Date: 2016-08-31
SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many deficiencies in the current method of smelting alloys. The current method is to add alloying elements such as Cr, Si, and Al to the steel, or carry out alloying treatment of Cr, Si, and Al on the surface of the steel. A layer of dense oxide film can be quickly formed in the atmosphere, and firmly attached to the surface of the steel, thereby effectively preventing the oxidation from continuing; the second is to form oxides and carbides with high melting points on the surface of the steel by various methods , nitride and other high-temperature resistant coatings, the alloys produced in this way do not have good heat resistance, and the manufacturing cost is high and the manufacturing is complicated

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A smelting method based on a nickel-based heat-resistant alloy, the specific steps are as follows:

[0019] Step A, the preparation of molten steel, put quantitative metal nickel, metal chromium, metal cobalt, niobium iron, vanadium iron, titanium iron in the EAF electric arc furnace, heat to high temperature until each metal melts;

[0020] Step B, the removal of molten steel impurities, first adjust the temperature and refine the molten steel produced in step A for a period of time, then add electrolytic aluminum and ferroboron for sufficient stirring to carry out deoxidation treatment;

[0021] Step C, pouring of molten steel, put the molten alloy steel produced in step B into the LF ladle furnace to cool for a period of time, and then pour it into the shaping mold with exothermic agent added at the riser;

[0022] Step D, alloy phase transformation treatment, place the casted alloy in step C at a temperature of 1280°C-1300°C for 24-30h, and after the alloy is anneal...

Embodiment 2

[0026] In the preparation of molten steel in step A, the weight percentages are: 0.01-0.03% nickel, 19.5-21% chromium, 0.02-0.03% cobalt, 0.01-1.5% niobium, 0.2-0.6% vanadium, 1.5-3.0% titanium %, S≤0.02, P≤0.02, and the balance is unavoidable impurities. The high temperature in step A is 2800°C-3000°C. In the process of removing impurities in the molten steel in step B, 2% by weight electrolytic aluminum and 0.005% by weight ferroboron are added for sufficient stirring. In step B, the deoxidation process in the removal of molten steel impurities is as follows: add 0.5-0.8% Mn and 1-2% Si by weight in molten steel to carry out pre-deoxidation, thin slag on the surface of molten steel After formation, charcoal powder is added for final deoxidation. The reprocessing process of the alloy in step E is as follows: first, blank the alloy forged in step D, and then perform quenching treatment after blanking. The temperature during quenching is 850-900 ° C. Put the alloy at 500°C-5...

Embodiment 3

[0028] In the preparation of molten steel in step A, the weight percentages are: 0.01-0.03% nickel, 19.5-21% chromium, 0.02-0.03% cobalt, 0.01-1.5% niobium, 0.2-0.6% vanadium, 1.5-3.0% titanium %, S≤0.02, P≤0.02, and the balance is unavoidable impurities. The high temperature in step A is 2800°C-3000°C. In the process of removing impurities in the molten steel in step B, 2% by weight electrolytic aluminum and 0.005% by weight ferroboron are added for sufficient stirring. In step B, the deoxidation process in the removal of molten steel impurities is as follows: add 0.5-0.8% Mn and 1-2% Si by weight in molten steel to carry out pre-deoxidation, thin slag on the surface of molten steel After formation, charcoal powder is added for final deoxidation. The reprocessing process of the alloy in step E is as follows: firstly, the alloy forged in step D is blanked, and then quenched, the temperature during quenching is 850-900°C, and air-cooled for 3.5 hours after quenching, and Put...

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

No PUM Login to view more

Abstract

The invention discloses a smelting method based on a nickel-based heat-resistance alloy. The method comprises specific steps that molten steel is prepared, and the quantitative amount of metal nickel, the quantitative amount of metal chromium, the quantitative amount of metal cobalt, the quantitative amount of ferrocolumbium, the quantitative amount of ferrovanadium and the quantitative amount of ferrotitanium are loaded in an EAF electric arc furnace, and heated to the high temperature until all kinds of metal are molten; impurities of the molten steel are removed, the prepared molten steel is subject to temperature adjustment and refining for a period, and then, electrolytic aluminum and ferroboron are added to be subject to sufficient stirring and deoxidation treatment; the molten steel is poured, the prepared alloy molten steel is put into an LF ladle furnace to be cooled for a period, and then the molten steel is poured into a shaping mold, wherein a heating agent is added into a riser of the mold; alloy phase change treatment is carried out, the poured alloy is subject to heat preservation for 24 h to 30 h at the temperature of 1280 DEG C to 1300 DEG C, after the alloy is annealed, the alloy is rapidly cooled to 800 DEG C, then the alloy is shifted into a heat preservation furnace to be subject to phase change, and after the temperature rises to a certain temperature, forging heating is carried out; and the alloy is re-machined, and the forged alloy is subject to discharging, quenching and medium-temperature tempering. The manufactured alloy is low in cost.

Description

technical field [0001] The invention relates to an alloy smelting method, in particular to a nickel-based heat-resistant alloy-based smelting method, and belongs to the technical field of alloy smelting method applications. Background technique [0002] With the development of science and technology, the demand for the output and variety of special alloys is increasing, and the requirements for quality are becoming more and more strict and demanding. In recent years, focusing on improving the performance, quality, variety and efficiency of special alloys, reducing the cost of special alloys, A series of new technologies, new processes, and new equipment have been adopted in terms of energy saving, consumption reduction, and environmental friendliness, which have greatly improved the cleanliness, uniformity, microstructure, and dimensional accuracy of special alloys. Heat-resistant alloys are also known as Superalloys, which are of great significance for industrial sectors an...

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 Applications(China)
IPC IPC(8): C22C33/06C22C38/52C22C38/50C22C38/46C22C38/48C21D8/00
CPCC22C33/06C21D8/005C22C38/46C22C38/48C22C38/50C22C38/52
Inventor 李建雷德江刘永新黄志永丁勇张华国
Owner SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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