Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pre-melting slag for electroslag remelting titanium-containing steel and method for preparing electroslag remelting low-oxygen titanium-containing steel through deoxidation

A technology of electroslag remelting and oxygen-containing titanium steel, which is applied in the field of electroslag metallurgy and electroslag remelting high-end special steel, which can solve the problems of titanium dioxide volatile, uneven titanium dioxide, uneven aluminum and titanium composition, surface quality, etc. problems, to achieve the effect of reducing oxygen content, uniform content, and uniform composition

Active Publication Date: 2021-06-04
SUZHOU UNIV
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly aims at the problems of inhomogeneity of aluminum and titanium composition and poor surface quality of electroslag remelting titanium-containing steel in the prior art, easy volatilization of titanium dioxide in the process of adding titanium dioxide, and unevenness of titanium dioxide in the slag, and provides an electroslag remelted titanium-containing steel. Pre-melted slag for slag remelting titanium-containing steel, the pre-melted slag can not only ensure the uniformity of Al and Ti content in the process of electroslag remelting, but also improve the surface quality of electroslag ingots

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
  • Pre-melting slag for electroslag remelting titanium-containing steel and method for preparing electroslag remelting low-oxygen titanium-containing steel through deoxidation
  • Pre-melting slag for electroslag remelting titanium-containing steel and method for preparing electroslag remelting low-oxygen titanium-containing steel through deoxidation
  • Pre-melting slag for electroslag remelting titanium-containing steel and method for preparing electroslag remelting low-oxygen titanium-containing steel through deoxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A pre-melted slag for electroslag remelting titanium-containing steel, consisting of A pre-melted slag and B pre-melted slag;

[0047] In A pre-melted slag, each component and weight percent are as follows:

[0048]

[0049] In the B pre-slag, each component and weight percentage are as follows:

[0050] .

[0051] Using conventional methods, the CaF 2 , CaO, MgO, Al 2 o 3 After mixing and stirring, melt in an electric arc furnace, and obtain A pre-slag after cooling and crushing; CaF 2 , CaO, MgO, Al 2 o 3 、TiO 2 After mixing and stirring, it is melted in an electric arc furnace, cooled and crushed to obtain B pre-slag.

[0052] Mix A pre-melted slag and B pre-melted slag to obtain pre-melted slag for electroslag remelting titanium-containing steel; assuming x For the ratio content of pre-slag A, (1- x ) is the ratio of pre-slag B, x The selection of is shown in the formula (4), according to the formula (4) to draw figure 1 ,for With the change curve...

Embodiment 2

[0057] For the GH2132 superalloy, the composition of its products is shown in Table 1. The upper limit of aluminum and titanium elements in the product is Al: 0.35%, Ti: 2.3%. Vacuum induction melting furnace is used to conventionally smelt and cast electrode rods as consumable electrodes; in consumable electrodes, Al: 0.3%, Ti: 2%, O: 0.0006%, adopt the method established by the present invention, refer to figure 1 And formula (4), the mixing ratio of A and B slags is determined to be 2.2:7.8, that is, the mass percentage of A pre-melted slag is 22%, and the mass percentage of B pre-melted slag is 78%.

[0058] Using the A pre-melted slag and B pre-melted slag of Example 1, the electroslag remelting is carried out on an electroslag furnace with a capacity of 5000kg and an inner diameter of the crystallizer of 66cm. The current and voltage are respectively 15000A and 60V, and the electrode diameter is 50cm. The amount of slag is 180kg (A pre-melted slag is 39.6kg, B pre-melted...

Embodiment 3

[0085] see Figure 7 , a deoxidizer conveying device for electroslag remelting, consisting of a frequency conversion motor 2, a frequency converter 3, a gear box 4, a deoxidizer loading bin 5, a deoxidizer conveying chamber 6, a deoxidizer conveying screw rod 7, and a deoxidizer conveying pipe 9. The deoxidizer slide tube 15 and the base 17 are composed of an insulating ferrule 16 between the deoxidizer delivery pipe and the deoxidizer slide tube. The deoxidizer delivery pipe and the deoxidizer slide tube are not in contact, and are respectively inserted into the insulating ferrule for communication. In this way, insulation communication is formed to avoid electric transmission; a stirring rod 18 is installed on the gear box, and the stirring rod is inserted into the deoxidizer delivery chamber to stir the deoxidizer in the deoxidizer delivery chamber.

[0086] The deoxidizer conveying screw and stirring rod are installed on the gearbox (double-shaft gearbox), and the gearbox ...

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 pre-melting slag for electroslag remelting titanium-containing steel and a method for preparing electroslag remelting low-oxygen titanium-containing steel through deoxidation. The pre-melting slag and the method aim at solving the problems that the titanium-aluminum ratio in an electroslag remelting ingot is reasonably controlled and the surface quality of the electroslag ingot and the cleanliness of the ingot are improved, and particularly the problems that titanium of the electroslag remelting titanium-containing steel is burnt out and the titanium is not uniform in the axial direction of the electroslag ingot. In order to guarantee the titanium-aluminum ratio of an electroslag remelting target steel grade in the prior art, titanium dioxide is added into the slag to form a CaF2-CaO-MgO-Al2O3-TiO2 slag system, and due to the fact that in the adding process of the titanium dioxide in the electroslag remelting slag stage, the powdery titanium dioxide is likely to volatilize and the titanium dioxide in the slag is not evenly mixed, Ti at the bottom of an electroslag ingot is not even. According to the pre-melting slag and the method, A + B titanium-containing pre-melted slag is designed, and the pre-melted slag of the group A and the group B are mixed and matched for use, the production requirements of high-temperature alloys with different titanium-aluminum ratios are met, the characteristic of the low melting point is achieved, and the surface quality of electroslag ingots is improved; and a deoxidizing agent is continuously added, and therefore the titanium is uniformly distributed in the axial direction of the electroslag ingot, and the cleanliness of the ingot is improved.

Description

technical field [0001] The invention belongs to the field of electroslag metallurgy, in particular to the field of electroslag remelting high-end special steel, and specifically relates to a method for preparing electroslag remelting ingots by using pre-melted slag and deoxidation for electroslag remelting titanium-containing steel. Background technique [0002] Titanium-containing steels mainly include titanium-stabilized duplex stainless steels and superalloys. For superalloys, reasonable Al and Ti contents must be ensured to meet the requirements of Ni in the superalloy matrix. 3 (Al, Ti) strengthening phase requirements to improve the performance of superalloys; for titanium-stabilized duplex stainless steel, in order to ensure good intergranular corrosion resistance, there are strict requirements on the control range of Al and Ti content in the steel. In addition, the melting point of titanium-containing steel is low, and the surface quality of the electroslag ingot is...

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
IPC IPC(8): C22B9/18C22B9/187C21C7/06
CPCC22B9/18C21C7/06
Inventor 侯栋王德永屈天鹏王慧华田俊胡绍岩李向龙潘鹏
Owner SUZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com