Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of titanium alloy ingot containing prone to segregation elements

A technology of titanium alloy and easy segregation is applied in the field of preparation of titanium alloy ingots, which can solve problems such as being difficult to realize, and achieve the effects of reducing segregation, shortening solute redistribution time and uniform composition.

Inactive Publication Date: 2019-04-12
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, domestic vacuum self-consumption melting furnaces are basically current-controlled, so this method is difficult to achieve

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
  • Preparation method of titanium alloy ingot containing prone to segregation elements
  • Preparation method of titanium alloy ingot containing prone to segregation elements
  • Preparation method of titanium alloy ingot containing prone to segregation elements

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The present invention proposes the preparation method of this alloy, specifically comprises the following steps:

[0027] 1) Master alloy selection

[0028] The main elements of the titanium alloy ingot are analyzed, and the main element ratio in the titanium alloy ingot is added in the form of a ternary or higher intermediate alloy; the matrix is ​​titanium sponge, and the ternary or higher intermediate alloy is guaranteed not to be added. Or add less other elements. If the composition of the target ingot is not satisfied, add a pure metal or binary alloy to meet the composition of the target ingot.

[0029] 2) Electrode preparation

[0030] According to the composition of the titanium alloy ingot to be prepared, the intermediate alloy of ternary and above ternary, titanium sponge, aluminum bean or titanium-tin alloy is weighed according to the mass percentage of the target ingot, and the electrode block is pressed after mixing evenly. Then the pressed electrode grou...

Embodiment 1

[0044] 500Kg grade TB3 titanium alloy (nominal composition Ti-3.5Al-10Mo-8V-1Fe) ingot preparation:

[0045] 1) Master alloy selection

[0046] Contain Al, Mo, V, Fe in this alloy, wherein Mo, Fe are easy segregation elements, select molybdenum vanadium aluminum iron master alloy (Mo, V, Al, Fe mass ratio is 45:36: 14:5), wherein the grain size of the alloy is controlled at 0.25-3mm;

[0047] 2) Electrode preparation

[0048] The molybdenum-vanadium-aluminum-iron master alloy, titanium sponge and aluminum beans are weighed according to the mass percentage, mixed evenly, and the electrode block is pressed, and then the pressed electrode group is welded into an electrode.

[0049] 3) One smelting

[0050] The electrode prepared in step 2) is used as a consumable electrode in a vacuum consumable electric arc furnace to obtain a φ220mm primary ingot, the melting current is 8.0-10.0KA, and the arc-stabilizing current is DC7-8A;

[0051] 4) Secondary smelting

[0052] The prima...

Embodiment 2

[0059]700Kg grade TB5 titanium alloy (nominal composition Ti-10V-3Al-3Cr-3Sn) ingot preparation:

[0060] 1) Master alloy selection

[0061] Contain V, Al, Cr, Sn in this alloy, wherein Cr, Sn are easy segregation elements, select vanadium-aluminum-chromium-tin master alloy (V, Al, Cr, Sn mass ratio is 64:12: 12:10), wherein the grain size of the alloy is controlled at 0.25-3mm;

[0062] 2) Electrode preparation

[0063] The vanadium-aluminum-chromium-tin master alloy, titanium sponge and titanium-tin alloy are weighed according to the mass percentage, mixed evenly, and the electrode block is pressed, and then the pressed electrode group is welded into an electrode.

[0064] 3) One smelting

[0065] The electrode prepared in step 2) is used as a consumable electrode in a vacuum consumable electric arc furnace to obtain a φ220mm primary ingot, the melting current is 8.0-10KA, and the arc-stabilizing current is DC 6.0-7.0A;

[0066] 4) Secondary smelting

[0067] The primar...

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 preparation method of a titanium alloy ingot containing prone to segregation elements. According to the mass percent of the elements of the target titanium alloy ingot, ternary and more than ternary intermediate alloy, sponge titanium and aluminum shot are uniformly mixed, or the ternary and more than ternary intermediate alloy, the sponge titanium and titanium-tin alloyare uniformly mixed, then electrode block is pressed, and then the pressed electrode group is welded into an electrode; and finally smelting is carried out for multiple times, peeling, flaw detectionand sawing risers are carried out, so that a titanium alloy ingot is obtained. According to the preparation method, the alloying is facilitated by selecting ternary and more than ternary intermediatealloy forms, meanwhile, the types of the alloy are reduced, the introduction of other impurity elements or uncertain factors can be reduced, and the production process is prone to control; ternary andmore than ternary of the intermediate alloy, the density is closer to that of the matrix sponge titanium, and the uniformity is easier to achieve in the smelting process; the smelting is carried outfor multiple times by adopting a vacuum self-consuming electric arc smelting furnace to obtain the titanium alloy ingot with uniform components and without segregation.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy preparation and relates to a method for preparing a titanium alloy ingot containing easily segregated elements. Background technique [0002] Due to its high specific strength, corrosion resistance, good high and low temperature performance, shape memory, biocompatibility and other excellent properties, titanium alloys are widely used in my country's aerospace, medical, chemical, naval and other fields. A certain amount of metal elements (such as Mo, Cr, Fe, Ni, etc.) are added to titanium alloys to improve material properties and meet application requirements. Although the added alloying elements can greatly improve the properties of materials, they cause regional segregation due to their different distribution coefficient K in titanium alloys, and the larger the ingot shape, the greater the degree of supercooling, the more serious the segregation, resulting in some alloys with excellent p...

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): C22C1/02C22C14/00C22B9/20
CPCC22B9/20C22C1/02C22C14/00
Inventor 薛祥义刘娣张利军周中波吴天栋
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD