CN109355511B - Electrode material for TiNiFe alloy vacuum consumable melting and preparation thereof - Google Patents
Electrode material for TiNiFe alloy vacuum consumable melting and preparation thereof Download PDFInfo
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- CN109355511B CN109355511B CN201811608196.7A CN201811608196A CN109355511B CN 109355511 B CN109355511 B CN 109355511B CN 201811608196 A CN201811608196 A CN 201811608196A CN 109355511 B CN109355511 B CN 109355511B
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Abstract
The invention discloses an electrode material for TiNiFe alloy vacuum consumable melting and a preparation method thereof, belonging to the technical field of plate electrode materials. The electrode material comprises more than two sections of electrode plates, wherein the adjacent two sections of electrode plates are spliced in a high-low dislocation mode, each section of electrode plate comprises the same number of electrode plate material units, and the electrode plate material units are high-purity titanium plate-high-purity iron plate-high-purity nickel plate composite plates with a sandwich structure; the splicing mode of the plate electrode material units in the adjacent two sections of electrode plates is that a high-purity titanium plate, a high-purity iron plate and a high-purity nickel plate are spliced in an aligned mode with a high-purity nickel plate, a high-purity iron plate and a high-purity titanium plate. The electrode material for TiNiFe alloy vacuum consumable melting provided by the invention has the advantages of accurate component proportioning and high welding connection strength, and lays a foundation for TiNiFe alloy with uniform vacuum induction melting components and low impurity content; the preparation method is simple, and can be popularized to the preparation of plate electrode materials of other titanium alloys by vacuum consumable melting.
Description
Technical Field
The invention belongs to the technical field of plate electrode materials, and particularly relates to an electrode material for TiNiFe alloy vacuum consumable melting and a preparation method thereof.
Background
The TiNiFe alloy is a shape memory alloy material, has low phase transition temperature and excellent mechanical property and memory recovery property, and is commonly used for preparing pipe joints for aviation hydraulic pipelines. Because the phase transition temperature and the memory recovery performance of the alloy are very sensitive to the uniformity of alloy components and impurity content, the preparation of the alloy material with uniform components and low impurity content is the basic material requirement for the production of high-performance aviation pipe joints. At present, TiNiFe alloy cast ingots are prepared by vacuum consumable melting, so that higher-quality ingot shapes can be obtained, and the stability requirement of products can be better met.
The electrode material for vacuum consumable smelting of titanium alloy is prepared by uniformly mixing titanium sponge and master alloy particles (powder) according to a component ratio and pressing the mixture into the electrode material by an oil press. The TiNiFe alloy has high requirements on impurity content (oxygen, carbon, nitrogen and the like), and the method for pressing the electrode material by adopting the titanium sponge mixed material cannot meet the requirements on the impurity content, so that the plate electrode material needs to be prepared by adopting a high-purity titanium plate, a high-purity nickel plate and a high-purity iron plate. The plate electrode material for vacuum consumable melting is difficult to prepare, in addition, the plate electrode material needs to be welded, the welding performance of the TiNiFe alloy welding wire with a high-purity titanium plate, a high-purity nickel plate and a high-purity iron plate is poor, and if the electrode material is not welded actually, the electrode material is easy to fall off in the vacuum consumable melting process, so that the melting failure is caused.
Disclosure of Invention
The invention aims to provide an electrode material for TiNiFe alloy vacuum consumable melting and a preparation method thereof, and the specific technical scheme is as follows:
an electrode material for TiNiFe alloy vacuum consumable melting comprises more than two sections of electrode plate materials, wherein the adjacent two sections of electrode plate materials are spliced in a high-low dislocation mode, each section of electrode plate material comprises the same number of electrode plate material units, and the electrode plate material units are high-purity titanium plate-high-purity iron plate-high-purity nickel plate composite plate materials with a sandwich structure;
the splicing mode of the plate electrode material units in the adjacent two sections of electrode plates is that a high-purity titanium plate, a high-purity iron plate and a high-purity nickel plate are spliced in an aligned mode with a high-purity nickel plate, a high-purity iron plate and a high-purity titanium plate.
The dislocation height is 20-50 mm.
The splicing connection position of the two adjacent sections of electrode plate materials with high-low dislocation is welded by argon arc welding; and punching holes in the staggered region with the two adjacent sections of electrode plate materials staggered in height, and connecting the two sections of electrode plate materials by using pins.
The welding wire for argon arc welding adopts wire materials which are the same as the TiNiFe alloy in composition, and the pin adopts a bar material which is the same as the TiNiFe alloy in composition.
The preparation method of the electrode material for TiNiFe alloy vacuum consumable melting comprises the following steps:
(1) respectively processing a high-purity titanium plate, a high-purity iron plate and a high-purity nickel plate by utilizing cold rolling, designing the plate thicknesses of the high-purity titanium plate, the high-purity iron plate and the high-purity nickel plate according to the TiNiFe alloy component, and designing the plate widths and lengths of the high-purity titanium plate, the high-purity nickel plate and the high-purity iron plate according to the size of a vacuum consumable melting crucible;
(2) forming a sandwich structure by the high-purity titanium plate, the high-purity iron plate and the high-purity nickel plate which are subjected to cold rolling in the step (1) according to the sequence of Ti-Fe-Ni, and welding and fixing by adopting an argon arc welding spot welding method to obtain an electrode plate material unit;
(3) spot welding and fixing the electrode plate material units obtained in the step (2) by 1 and a plurality of the electrode plate material units to obtain a plurality of sections of electrode plates, splicing the plurality of sections of electrode plates in a high-low dislocation mode, wherein the splicing mode of the electrode plate material units in the two adjacent sections of electrode plates is the contraposition splicing of a high-purity titanium plate, a high-purity iron plate, a high-purity nickel plate and a high-purity nickel plate, the high-purity iron plate and the high-purity titanium plate;
(4) welding the splicing connection position of the two adjacent sections of electrode plate materials in a staggered manner by adopting argon arc welding; and then punching a hole in the high-low dislocation section of the adjacent two sections of electrode plate materials, and connecting by using a pin to prepare the electrode material for the TiNiFe alloy vacuum consumable melting.
In the step (1), the weight error of each plate of the high-purity titanium plate, the high-purity iron plate and the high-purity nickel plate and the TiNiFe alloy is less than or equal to 0.03 percent.
The invention has the beneficial effects that:
(1) according to the invention, the electrode material is obtained by splicing the multiple sections of electrode plates in a high-low dislocation manner, so that the length of a welding line is increased, the welding strength is improved, and the welding flatness of the multiple sections of electrode plates is also improved;
(2) the splicing mode of the plate electrode material units in the adjacent two sections of electrode plates adopts the staggered contraposition splicing of a high-purity titanium plate, a high-purity iron plate, a high-purity nickel plate and a high-purity nickel plate, the high-purity iron plate and the high-purity titanium plate, so that the component uniformity in the smelting process can be obviously improved;
(3) after the multi-section electrode plate materials are welded by argon arc welding, pin connection is adopted, so that the reliability of the connection of the multi-section electrode plate materials is further improved, the defect of poor welding performance of the TiNiFe alloy electrode material is overcome, the risk of falling off of the electrode material in the vacuum consumable melting process is avoided, and the guarantee is provided for preparing the TiNiFe alloy with uniform components by vacuum consumable melting;
(4) the electrode material for TiNiFe alloy vacuum consumable melting provided by the invention has the advantages of accurate component proportioning and high welding connection strength, and lays a foundation for TiNiFe alloy with uniform vacuum induction melting components and low impurity content; the preparation method is simple, and can be popularized to the preparation of plate electrode materials of other titanium alloys by vacuum consumable melting.
Drawings
FIG. 1 is a schematic plan view of a sandwich structure of an electrode plate material unit according to the present invention;
FIG. 2 is a schematic plane view of a multi-section electrode plate material splicing mode with high-low dislocation;
FIG. 3 is a schematic plane view of a multi-section electrode plate material high-low dislocation splicing joint connected by a pin;
description of reference numerals: 1-high-purity titanium plate; 2-high-purity nickel plate; 3-high-purity iron plate; 4-pins.
Detailed Description
The invention provides an electrode material for TiNiFe alloy vacuum consumable melting and a preparation method thereof, and the invention is further explained by combining the attached drawings and the embodiment.
The electrode plate material unit shown in fig. 1 is of a sandwich structure, a high-purity iron plate 3 is arranged between a high-purity titanium plate 1 and a high-purity nickel plate 2, and the high-purity titanium plate 1, the high-purity nickel plate 2 and the high-purity iron plate 3 are welded and fixed by adopting an argon arc welding spot welding method. Wherein, the length and the width of the high-purity titanium plate 1, the high-purity nickel plate 2 and the high-purity iron plate 3 are determined according to the size of the vacuum consumable melting crucible, andthe length and width dimensions of the three parts are the same; thickness of high purity titanium plate 1, high purity nickel plate 2, high purity iron plate 3, d2、d3And the dimensional tolerance is determined according to the composition of the TiNiFe alloy, and the error between the weight of each plate of the high-purity titanium plate 1, the high-purity nickel plate 2 and the high-purity iron plate 3 and the composition of the TiNiFe alloy is ensured to be less than or equal to 0.03 percent.
And spot-welding and fixing the same number of electrode plate material units shown in the figure 1 to obtain a section of electrode plate material, and splicing the two sections of electrode plate materials in a height dislocation mode, wherein the dislocation height is 20-50 mm as shown in the figure 2. In the figure 2, the splicing mode of the electrode plate material units in the upper and lower sections of electrode plate materials is that a high-purity titanium plate, a high-purity iron plate and a high-purity nickel plate are spliced with a high-purity nickel plate, a high-purity iron plate and a high-purity titanium plate in a staggered contraposition mode.
The staggered contraposition splicing method specifically comprises the following steps: on the basis of the same direction (from left to right or from right to left), in the adjacent upper and lower sections of electrode plate materials, the electrode plate material units in the arrangement sequence of the high-purity titanium plate, the high-purity iron plate and the high-purity nickel plate in one section of electrode plate material are spliced in an aligned mode to be the electrode plate material units in the arrangement sequence of the high-purity nickel plate, the high-purity iron plate and the high-purity titanium plate in the other section of electrode plate material.
Argon arc welding is adopted at the splicing joint shown in figure 2, holes are punched in the staggered areas of the upper section electrode plate material and the lower section electrode plate material which are staggered in height, and the upper section electrode plate material and the lower section electrode plate material are connected through pins 4, as shown in figure 3.
Example 1
The electrode material of Ti50Ni47Fe3 alloy (atom percentage content) is prepared by the following steps, and the diameter of a vacuum consumable melting crucible is 160 mm.
(1) According to the requirements of TiNiFe alloy components, the thickness and the dimensional tolerance of a high-purity titanium plate, a high-purity nickel plate and a high-purity iron plate are designed, and the requirements are as follows: thickness of the high-purity titanium plate: 2.47 plus or minus 0.02 mm; thickness of the high-purity nickel plate: 1.45 plus or minus 0.02 mm; thickness of the high-purity iron plate: 0.10 plus or minus 0.01 mm; after the high-purity titanium plate, the high-purity nickel plate and the high-purity iron plate are subjected to cold rolling deformation, the high-purity titanium plate, the high-purity nickel plate and the high-purity iron plate are respectively cut into slabs with the length of 800mm and the width of 100mm according to the size of a vacuum consumable melting crucible.
(2) According to the component proportioning requirement of the TiNiFe alloy, the weight error of various plates is less than or equal to 0.03 percent. And (2) forming a sandwich structure by the high-purity titanium plate, the high-purity nickel plate and the high-purity iron plate which are subjected to the precise batching in the step (1) according to the sequence of Ti-Fe-Ni, as shown in figure 1. And welding and fixing by adopting an argon arc welding spot welding method to obtain the electrode plate material unit.
(3) Fixing a plurality of electrode plate material units obtained in the step (2) by using spot welding to obtain three sections of electrode plates, wherein each section of electrode plate material consists of 24 electrode plate material units; sequentially splicing three sections of electrode plates by adopting a mode of splicing every two adjacent sections of electrode plates in a staggered manner, wherein the staggered height is 30 mm; the splicing mode of the plate electrode material units in the adjacent two sections of electrode plates is that a high-purity titanium plate, a high-purity iron plate and a high-purity nickel plate, the high-purity iron plate and the high-purity titanium plate are spliced in a staggered contraposition mode, as shown in figure 2.
(4) Adopting a wire material with the same composition as the TiNiFe alloy and the diameter of 3mm as a welding wire, and adopting argon arc welding at the splicing connection part of the high-low dislocation of each two adjacent sections of electrode plate materials; after welding, holes are drilled in the staggered area of the height dislocation of every two adjacent sections of electrode plates, namely the splicing joint, and the rods with the same composition as the TiNiFe alloy and the diameter of 15mm are placed in the holes to be connected by pins, as shown in figure 3. The electrode material for TiNiFe alloy vacuum consumable melting with the length of 2400mm, the width of 100mm and the thickness of 100mm is prepared.
Claims (3)
1. The electrode material for TiNiFe alloy vacuum consumable melting is characterized by comprising more than two sections of electrode plates, wherein the adjacent two sections of electrode plates are spliced in a high-low dislocation mode, each section of electrode plate comprises the same number of electrode plate material units, and the electrode plate material units are high-purity titanium plate-high-purity iron plate-high-purity nickel plate composite plates with a sandwich structure;
the splicing mode of the plate electrode material units in the adjacent two sections of electrode plates is that a high-purity titanium plate, a high-purity iron plate and a high-purity nickel plate are spliced in an alignment mode with the high-purity nickel plate, the high-purity iron plate and the high-purity titanium plate;
the dislocation height is 20-50 mm;
the splicing connection position of the two adjacent sections of electrode plate materials with high-low dislocation is welded by argon arc welding; punching a staggered area with staggered height of the two adjacent sections of electrode plates, and connecting by using a pin;
the welding wire for argon arc welding adopts wire materials which are the same as the TiNiFe alloy in composition, and the pin adopts a bar material which is the same as the TiNiFe alloy in composition.
2. The method for preparing the TiNiFe alloy electrode material for vacuum consumable melting according to claim 1, which is characterized by comprising the following steps:
(1) respectively processing a high-purity titanium plate, a high-purity iron plate and a high-purity nickel plate by utilizing cold rolling, designing the plate thicknesses of the high-purity titanium plate, the high-purity iron plate and the high-purity nickel plate according to the TiNiFe alloy component, and designing the plate widths and lengths of the high-purity titanium plate, the high-purity nickel plate and the high-purity iron plate according to the size of a vacuum consumable melting crucible;
(2) forming a sandwich structure by the high-purity titanium plate, the high-purity iron plate and the high-purity nickel plate which are subjected to cold rolling in the step (1) according to the sequence of Ti-Fe-Ni, and welding and fixing by adopting an argon arc welding spot welding method to obtain an electrode plate material unit;
(3) spot welding and fixing the electrode plate material units obtained in the step (2) by 1 and a plurality of the electrode plate material units to obtain a plurality of sections of electrode plates, splicing the plurality of sections of electrode plates in a high-low dislocation mode, wherein the splicing mode of the electrode plate material units in the two adjacent sections of electrode plates is the contraposition splicing of a high-purity titanium plate, a high-purity iron plate, a high-purity nickel plate and a high-purity nickel plate, the high-purity iron plate and the high-purity titanium plate;
(4) welding the splicing connection position of the two adjacent sections of electrode plate materials in a staggered manner by adopting argon arc welding; and then punching a hole in the high-low dislocation section of the adjacent two sections of electrode plate materials, and connecting by using a pin to prepare the electrode material for the TiNiFe alloy vacuum consumable melting.
3. The preparation method according to claim 2, wherein the error between the weight of each plate of the high-purity titanium plate, the high-purity iron plate and the high-purity nickel plate in the step (1) and the composition of the TiNiFe alloy is less than or equal to 0.03 percent.
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| RU2004138063A (en) * | 2004-12-24 | 2006-06-10 | ОАО "Верхнесалдинское металлургическое производственное объединение" (ВСМПО) (RU) | METHOD FOR PRODUCING CONSUMABLE ELECTRODE FOR MELTING TITANIUM ALLOYS INGOTS |
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