CN102644006A - Preparation method for titanium alloy TC18 through vacuum smelting - Google Patents
Preparation method for titanium alloy TC18 through vacuum smelting Download PDFInfo
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Abstract
The invention discloses a preparation method for titanium alloy TC18 through vacuum smelting, the process flows comprise: proportioning alloy elements, mixing up master alloy and titanium sponge, pressing and welding the electrode, smelting in a vacuum self-consuming furnace for three times, sampling and detecting flaw of the scaling, and casting the end product. The invention has the following advantages that the invention provides a preparation method for titanium alloy TC18 through vacuum smelting, which comprises reasonable selection and proportion of master alloy, and optimized selection of parameters of electrode block pressing and smelting process, the problems of component segregation and poor stability of alloy element content are solved, and is suitable for the industrialized production.
Description
Technical field
The present invention relates to the titanium or titanium alloy manufacture field, relate in particular to a kind of TC18 titanium alloy vacuum smelting preparation method.
Background technology
The TC18 titanium alloy is to use more structural titanium alloy in the domestic and international aeronautical material, and its hardening capacity is good, can be used for the load-carrying member of aircraft.Contain Al, Mo, V, Cr, five kinds of alloying elements of Fe in the TC18 titanium alloy, nominal chemical ingredients is: Ti-5Al-5Mo-5V-1Cr-1Fe, the alloying element total content reaches 17%.According to the requirement among the GB GB/T 3620.1-2007 " the titanium or titanium alloy trade mark and chemical ingredients ", TC18 titanium alloy chemical Composition Control scope such as following table:
| Aluminium Al% | Molybdenum Mo% | Vanadium V% | Chromium Cr% | Iron Fe% |
| 4.4～5.7 | 4.0～5.5 | 4.0～5.5 | 0.5～1.5 | 0.5～1.5 |
Wherein HMP elements Mo content is 5%, and being prone to segregation element Fe content is 1%.The crystallization property of these elements is different; Receive factor affecting such as alloy proportion, the selection of melting technology parameter and fusion process control; Problems such as component segregation, the poor stability of alloying element content often occur, have a strong impact on the carrying out of following process operation and the quality of finished product.To the unmanageable technological difficulties of TC18 titan alloy casting ingot chemical ingredients homogeneity, research master alloy element adds the process method of mode and vacuum consumable arc-melting in the production.
Summary of the invention
To the deficiency of above-mentioned technology, the purpose of this invention is to provide a kind of TC18 titanium alloy vacuum smelting preparation method that can effectively solve the problems such as poor stability of component segregation and alloying element content.
Technical scheme of the present invention is: a kind of TC18 titanium alloy vacuum smelting preparation method, technical process: alloying element proportioning → master alloy and Titanium Sponge 40-60 mesh batch mixing → electrode compacting, three meltings of the welding → consumable electrode vacuum furnace → sampling that strips off the skin, flaw detection → ingot casting finished product; Its concrete steps are following:
(1), the alloying element proportioning: carry out alloying element batching according to the chemical ingredients of following weight percent: aluminium (5.0～5.3) %, molybdenum (4.9～5.1) %, vanadium (4.9～5.1) %, chromium (0.9～1.1) %, iron (0.9～1.1) %, all the other are titanium;
(2), master alloy and Titanium Sponge 40-60 mesh batch mixing: select the high-grade Titanium Sponge 40-60 mesh and uniform and stable master alloy raw material A l60Mo, Al60Fe and the Al85V of composition of 0.83-12.7mm small grain size for use, and pure Cr of small-particle and pure Al; Adopt mechanical means to carry out the homogenizing mixing treatment after selecting materials, and guarantee the mixing time more than 60 seconds, thorough mixing is even;
(3), electrode compacting, welding: the material that mixes is transported to through the haul dolly and carries out the electrode block compacting in the oil press feed bin, guarantees electrode density, and is combined into strip electrode, strip electrode is put into vacuum plasma weldering case be welded into consumable electrode; Avoided the pollution in the operating process like this, improved the homogeneity of alloying element original distribution in consumable electrode, to get into the alloy constituent element in molten bath even basically per moment when guaranteeing vacuum consumable smelting, guarantees the homogeneity of the final chemical ingredients of ingot casting;
(4), three meltings of consumable electrode vacuum furnace: the electrodes use vacuum consumable electrode arc furnace that butt welding connects carries out melting; For reaching the purpose of ingot casting homogenization of composition, TC18 titanium alloy finished product ingot casting adopts three vacuum consumable smeltings;
(5), the sampling that strips off the skin, flaw detection: to titanium alloy finished product ingot casting through three meltings, the sampling that strips off the skin, ingot casting surface longitudinal parted hair, in, the ends three part carries out chemical composition analysis; Then UT is carried out in the shrinkage cavity at ingot casting rising head position, and the excision rising head; Head, bottom transverse tangent plane at ingot casting are radially taken a sample 9 positions, analyze Fe, Mo elemental composition;
(6), ingot casting finished product warehouse-in.
In the said step (2), the uniform and stable master alloy raw material of composition can also be selected Al-40Mo-40V ternary master alloy and Al60Fe for use.
Advantage of the present invention is: the vacuum consumable electrode arc furnace melting working method that the invention provides a kind of TC18 titanium alloy; Rational master alloy selection and proportioning, electrode block compacting, melting technology optimization of parameter choice have wherein been comprised; Effectively solved component segregation; Problems such as alloying element content poor stability, and be applicable to suitability for industrialized production.
Description of drawings
Fig. 1 is the ingot casting synoptic diagram of vertically taking a sample.
Fig. 2 ingot casting head, bottom be 9 sampling synoptic diagram radially.
Embodiment
Following embodiment can illustrate in greater detail the present invention, but does not limit the present invention in any form.
Embodiment 1: (1), alloying element proportioning: carry out the alloying element batching according to the chemical ingredients of following weight percent: aluminium 5.1%, molybdenum 5.0%, vanadium 5.0%, chromium 1.1%, iron 1.0%, and all the other are titanium;
(2), master alloy and Titanium Sponge 40-60 mesh batch mixing: select the 0 grade of Titanium Sponge 40-60 mesh and uniform and stable master alloy raw material A l60Mo, Al60Fe and the Al85V of composition of 0.83-12.7mm small grain size for use, and pure Cr of small-particle and pure Al; Calculate required alloying element weight according to the proportioning in the step (1) and adopt mechanical means to carry out the homogenizing mixing treatment afterwards, and guarantee the mixing time more than 60 seconds, thorough mixing is even;
(3), electrode compacting, welding: the material that mixes is transported to through the haul dolly and carries out the electrode block compacting in the oil press feed bin; The circular electrode of compacting Φ 420mm; Guarantee electrode density, and be combined into strip electrode, strip electrode is put into vacuum plasma weldering case be welded into consumable electrode;
(4), three meltings of consumable electrode vacuum furnace: the electrodes use vacuum consumable electrode arc furnace that butt welding connects carries out vacuum consumable smelting three times, produces Φ 680mm titan alloy casting ingot;
(5), the sampling that strips off the skin, flaw detection: to titanium alloy finished product ingot casting through three meltings, the sampling that strips off the skin, as shown in Figure 1, the ingot casting side surface longitudinally, in, the bottom takes a sample, the result is as shown in table 2; At ingot casting head, bottom transverse tangent plane nine position samples radially, as shown in Figure 2, the Fe element and the HMP Mo element of big segregation tendency are analyzed, the result is as shown in table 3; The MV of result and target call, the distribution of each element are uniform;
Vertical composition analysis of table 2 TC18 alloy cast ingot
Table 3 TC18 alloy cast ingot is composition nine point analysiss radially
(6), ingot casting finished product warehouse-in.
Embodiment 2: (1), alloying element proportioning: carry out the alloying element batching according to the chemical ingredients of following weight percent: aluminium 5.1%, molybdenum 5.0%, vanadium 5.0%, chromium 1.05%, iron 1.0%, and all the other are titanium;
(2), master alloy and Titanium Sponge 40-60 mesh batch mixing: the high-grade Titanium Sponge 40-60 mesh and uniform and stable master alloy raw material A l-40Mo-40V ternary master alloy and the Al60Fe of composition that select the 0.83-12.7mm small grain size for use; And pure Cr of small-particle and pure Al; Calculate required alloying element weight according to the proportioning in the step (1) and adopt mechanical means to carry out the homogenizing mixing treatment afterwards, and guarantee the mixing time more than 60 seconds, thorough mixing is even;
(3), electrode compacting, welding: the material that mixes is transported to through the haul dolly and carries out the electrode block compacting in the oil press feed bin; The circular electrode of compacting Φ 420mm; Guarantee electrode density, and be combined into strip electrode, strip electrode is put into vacuum plasma weldering case be welded into consumable electrode;
(4), three meltings of consumable electrode vacuum furnace: the electrodes use vacuum consumable electrode arc furnace that butt welding connects carries out vacuum consumable smelting three times, produces Φ 680mm titan alloy casting ingot;
(5), the sampling that strips off the skin, flaw detection: to titanium alloy finished product ingot casting through three meltings, the sampling that strips off the skin, as shown in Figure 1, the ingot casting side surface longitudinally, in, the bottom takes a sample, the result is as shown in table 4; At ingot casting head, bottom transverse tangent plane nine position samples radially, as shown in Figure 2, the Fe element and the HMP Mo element of big segregation tendency are analyzed, the result is as shown in table 5; The MV of result and target call, the distribution of each element are uniform;
Vertical composition analysis of table 4 TC18 alloy cast ingot
Table 5 TC18 alloy cast ingot is composition nine point analysiss radially
(6), ingot casting finished product warehouse-in.
Claims (2)
1. a TC18 titanium alloy vacuum smelting preparation method is characterized in that technical process: alloying element proportioning → master alloy and Titanium Sponge 40-60 mesh batch mixing → electrode compacting, three meltings of the welding → consumable electrode vacuum furnace → sampling that strips off the skin, flaw detection → ingot casting finished product; Concrete steps are following:
(1), the alloying element proportioning: carry out alloying element batching according to the chemical ingredients of following weight percent: aluminium (5.0～5.3) %, molybdenum (4.9～5.1) %, vanadium (4.9～5.1) %, chromium (0.9～1.1) %, iron (0.9～1.1) %, all the other are titanium;
(2), master alloy and Titanium Sponge 40-60 mesh batch mixing: select the high-grade Titanium Sponge 40-60 mesh and uniform and stable master alloy raw material A l60Mo, Al60Fe and the Al85V of composition of 0.83-12.7mm small grain size for use, and pure Cr of small-particle and pure Al; Adopt mechanical means to carry out the homogenizing mixing treatment after selecting materials, and guarantee the mixing time more than 60 seconds, thorough mixing is even;
(3), electrode compacting, welding: the material that mixes is transported to through the haul dolly and carries out the electrode block compacting in the oil press feed bin, guarantees electrode density, and is combined into strip electrode, strip electrode is put into vacuum plasma weldering case be welded into consumable electrode; Avoided the pollution in the operating process like this, improved the homogeneity of alloying element original distribution in consumable electrode, to get into the alloy constituent element in molten bath even basically per moment when guaranteeing vacuum consumable smelting, guarantees the homogeneity of the final chemical ingredients of ingot casting;
(4), three meltings of consumable electrode vacuum furnace: the electrodes use vacuum consumable electrode arc furnace that butt welding connects carries out melting; For reaching the purpose of ingot casting homogenization of composition, TC18 titanium alloy finished product ingot casting adopts three vacuum consumable smeltings;
(5), the sampling that strips off the skin, flaw detection: to titanium alloy finished product ingot casting through three meltings, the sampling that strips off the skin, ingot casting surface longitudinal parted hair, in, the ends three part carries out chemical composition analysis; Then UT is carried out in the shrinkage cavity at ingot casting rising head position, and the excision rising head; Head, bottom transverse tangent plane at ingot casting are radially taken a sample 9 positions, analyze Fe, Mo elemental composition;
(6), ingot casting finished product warehouse-in.
2. a kind of TC18 titanium alloy vacuum smelting preparation method according to claim 1 is characterized in that, in the said step (2), the uniform and stable master alloy raw material of composition can also be selected Al-40Mo-40V ternary master alloy and Al60Fe for use.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769759A (en) * | 2014-01-08 | 2014-05-07 | 山西太钢不锈钢股份有限公司 | Method for welding electrode with riser and used for electric slag furnace |
| CN106498231A (en) * | 2016-11-15 | 2017-03-15 | 西北有色金属研究院 | A kind of ocean engineering titanium alloy of yield strength higher than 1000MPa |
| CN109487092A (en) * | 2018-12-19 | 2019-03-19 | 西部超导材料科技股份有限公司 | A kind of Ti6321 titan alloy casting ingot melting shrinkage compensation method |
| CN109550907A (en) * | 2018-12-14 | 2019-04-02 | 西部新锆核材料科技有限公司 | A method of solving the enrichment of zircaloy casting head ferro element |
| CN109777980A (en) * | 2019-02-28 | 2019-05-21 | 陕西天成航空材料有限公司 | A method of reducing high ferrous components titan alloy casting ingot segregation |
| CN111482765A (en) * | 2020-03-26 | 2020-08-04 | 宁夏中色金航钛业有限公司 | Method for adding iron into titanium and titanium alloy ingot |
| CN111496158A (en) * | 2020-05-15 | 2020-08-07 | 宝鸡富士特钛业（集团）有限公司 | Preparation method of TC4 titanium forging stock |
| CN111575510A (en) * | 2020-05-18 | 2020-08-25 | 西部超导材料科技股份有限公司 | Method for preparing TC25 titanium alloy ingot and ingot prepared by method |
| CN112458305A (en) * | 2020-10-27 | 2021-03-09 | 新疆湘润新材料科技有限公司 | Preparation method of large TC4 titanium alloy ingot |
| CN112501448A (en) * | 2020-11-11 | 2021-03-16 | 湖南金天钛业科技有限公司 | Method for smelting alloy in vacuum consumable mode |
| CN113234960A (en) * | 2021-05-08 | 2021-08-10 | 陕西工业职业技术学院 | Preparation method of alloy |
| CN114134351A (en) * | 2021-11-16 | 2022-03-04 | 湖南金天钛业科技有限公司 | Titanium alloy ingot and preparation method thereof |
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Cited By (17)
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| CN103769759B (en) * | 2014-01-08 | 2015-11-25 | 山西太钢不锈钢股份有限公司 | The electroslag furnace method of band cap mouth welding electrode |
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| CN106498231A (en) * | 2016-11-15 | 2017-03-15 | 西北有色金属研究院 | A kind of ocean engineering titanium alloy of yield strength higher than 1000MPa |
| CN109550907A (en) * | 2018-12-14 | 2019-04-02 | 西部新锆核材料科技有限公司 | A method of solving the enrichment of zircaloy casting head ferro element |
| CN109487092A (en) * | 2018-12-19 | 2019-03-19 | 西部超导材料科技股份有限公司 | A kind of Ti6321 titan alloy casting ingot melting shrinkage compensation method |
| CN109777980B (en) * | 2019-02-28 | 2021-03-30 | 陕西天成航空材料有限公司 | Method for reducing segregation of high-iron-content titanium alloy ingot |
| CN109777980A (en) * | 2019-02-28 | 2019-05-21 | 陕西天成航空材料有限公司 | A method of reducing high ferrous components titan alloy casting ingot segregation |
| CN111482765A (en) * | 2020-03-26 | 2020-08-04 | 宁夏中色金航钛业有限公司 | Method for adding iron into titanium and titanium alloy ingot |
| CN111482765B (en) * | 2020-03-26 | 2023-05-16 | 宁夏中色金航钛业有限公司 | Method for adding iron into titanium and titanium alloy cast ingot |
| CN111496158A (en) * | 2020-05-15 | 2020-08-07 | 宝鸡富士特钛业（集团）有限公司 | Preparation method of TC4 titanium forging stock |
| CN111575510A (en) * | 2020-05-18 | 2020-08-25 | 西部超导材料科技股份有限公司 | Method for preparing TC25 titanium alloy ingot and ingot prepared by method |
| CN112458305B (en) * | 2020-10-27 | 2021-12-14 | 新疆湘润新材料科技有限公司 | Preparation method of large TC4 titanium alloy ingot |
| CN112458305A (en) * | 2020-10-27 | 2021-03-09 | 新疆湘润新材料科技有限公司 | Preparation method of large TC4 titanium alloy ingot |
| CN112501448A (en) * | 2020-11-11 | 2021-03-16 | 湖南金天钛业科技有限公司 | Method for smelting alloy in vacuum consumable mode |
| CN112501448B (en) * | 2020-11-11 | 2022-05-03 | 湖南金天钛业科技有限公司 | Method for smelting alloy in vacuum consumable mode |
| CN113234960A (en) * | 2021-05-08 | 2021-08-10 | 陕西工业职业技术学院 | Preparation method of alloy |
| CN114134351A (en) * | 2021-11-16 | 2022-03-04 | 湖南金天钛业科技有限公司 | Titanium alloy ingot and preparation method thereof |
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Application publication date: 20120822 |