Preparation method of titanium alloy cast ingot containing high-melting-point elements

A high melting point metal and titanium alloy technology, applied in the field of titanium alloy preparation, can solve the problems of electrode block drop, influence on ingot quality, electrode strength reduction and other problems, and achieve the effects of quality assurance, reasonable smelting process design and easy operation.

Active Publication Date: 2013-03-13
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
View PDF4 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a large amount of powder is added to sponge titanium, the strength of the electrode will be significantly reduced, and the melting current is higher than that of conventional titanium alloys, which will easily cause the electrode to fall off and directly affect the quality of the ingot.

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 cast ingot containing high-melting-point elements

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] like figure 1 A preparation method of a titanium alloy ingot containing high melting point elements is shown, comprising the following steps:

[0040] Step 1. Weighing of raw materials: Proportion weighing of raw materials is carried out according to the nominal chemical composition of the titanium alloy to be prepared; the raw materials include fine particle sponge titanium with a particle size below 4mm, a titanium shell wrapped on the outside of the electrode block to be made and High-melting-point metal powder with a particle size of 80 mesh or less, and the melting point of the high-melting-point alloy element is higher than 2000°C.

[0041] During actual preparation, the high melting point alloy element is one or more of W, Ta, Mo and Nb. And, the mass percentage of the high melting point metal powder is above 15%.

[0042] Step 2, mixing materials: uniformly mix the fine particle titanium sponge and high-melting point metal powder weighed in step 1 to obtain a ...

Embodiment 1

[0051] In this embodiment, the nominal chemical composition of the titanium alloy to be prepared is Ti-30W, wherein the weight percentage of W element is 30%, and the balance is Ti and unavoidable impurities.

[0052] In this embodiment, a method for preparing a titanium alloy ingot containing high melting point elements is required, comprising the following steps:

[0053] Step 1. Weighing of raw materials: Proportion weighing of raw materials is carried out according to the nominal chemical composition of the titanium alloy to be prepared; the raw materials include fine particle sponge titanium with a particle size below 4mm, a titanium shell wrapped on the outside of the electrode block to be made and The particle size is 200 mesh tungsten powder.

[0054] Step 2, mixing materials: uniformly mix the fine particle titanium sponge and tungsten powder weighed in step 1 to obtain a uniform mixture.

[0055] In this embodiment, when the fine particle titanium sponge and tungste...

Embodiment 2

[0094] In this embodiment, the difference from Example 1 is that the nominal composition of the titanium alloy to be prepared in step 1 is Ti-32Mo, wherein the weight percentage of the Mo element is 30%, and the balance is Ti and unavoidable impurities; The selected raw materials include fine-grained titanium sponge with a particle size of less than 4 mm, a titanium shell wrapped on the outside of the electrode block to be made, and molybdenum powder with a particle size of 150 mesh. The fine-grained titanium sponge is grade 0 sponge titanium; the electrode made in step 3 The size is Φ160mm×300mm, the titanium plate used to process the first titanium sheet and the second titanium sheet is a rectangular plate, the size of the first titanium sheet and the second titanium sheet is 250mm×300mm and the thickness of both is 2mm; Since the raw materials include fine-grain sponge titanium, titanium shells and high-melting-point metal powders, before step 1 carries out proportioning wei...

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
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
melting pointaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a titanium alloy cast ingot containing high-melting-point elements, which comprises the following steps: 1, weighing raw materials: proportionally weighing the raw materials according to nominal chemical components of a titanium alloy to be prepared, wherein the raw materials include fine-grained sponge titanium, a titanium shell coated on the outer side of an electrode block to be prepared and high-melting-point metal powder; 2, mixing: evenly mixing the weighed fine-grained sponge titanium and high-melting-point metal powder to obtain a uniform mixture; 3, preparing a consumable electrode: pressing the evenly mixed uniform mixture into the electrode block, coating a titanium shell layer on the outer side of the electrode block, and welding the electrode block to form the consumable electrode; and 4, smelting: smelting the prepared consumable electrode in a vacuum consumable electric arc furnace to obtain the titanium alloy cast ingot containing high-melting-point elements. According to the invention, the method is simple in steps, reasonable in design, low in input cost, simple to use and operate and good in use effect; and the prepared titanium alloy cast ingot is uniform in components and has no high-density inclusions.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy preparation, and in particular relates to a method for preparing a titanium alloy ingot containing high melting point elements. Background technique [0002] High melting point elements such as W, Ta, Mo, and Nb are isomorphic β-stable elements of titanium alloys, which can be infinitely solid-soluble with titanium. Titanium alloys containing a large amount of such β-stable elements have special effects in corrosion resistance, flame retardancy, gas absorption, etc., such as Ti-32Mo, Ti-47Nb, Ti-75Ta alloys, etc., and their dosage shows a trend of rapid increase. Such alloys generally have ingot metallurgical quality problems. Since the melting point of W, Ta, Mo, Nb and other elements is much higher than that of Ti, and the density is high, high-density inclusions and micro-area inhomogeneity are prone to occur when using conventional vacuum consumable arc melting to prepare ingots. Alth...

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): C22C1/02C22C14/00C22B9/16
Inventor 葛鹏周伟李倩杨义卢亚锋
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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