CN100451156C - RE Invar alloy and its production process - Google Patents
RE Invar alloy and its production process Download PDFInfo
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- CN100451156C CN100451156C CNB2007100401543A CN200710040154A CN100451156C CN 100451156 C CN100451156 C CN 100451156C CN B2007100401543 A CNB2007100401543 A CN B2007100401543A CN 200710040154 A CN200710040154 A CN 200710040154A CN 100451156 C CN100451156 C CN 100451156C
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- invar alloy
- alloy
- inver
- production process
- invar
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Abstract
The present invention is one kind of RE Inver alloy superior to available Inver alloy, which has low welded joint strength caused by element diffusion in the Inver alloy/hard alloy interface. The RE Inver alloy consists of Ni 30-42 wt%, C 0.6-1 wt%, Mn 3.4 wt%, Nb 3-5 wt%, Y2O3 6-8 wt%, and Fe for the rest. Its production process includes the following steps: 1. compounding materials in the said composition; 2. vacuum induction smelting at 1450 deg.c; 3. casting and naturally cooling; and 4. pressing ingot to form rod of 58 mm diameter.
Description
Technical field
What the present invention relates to is a kind of welding technology field, specifically, relates to a kind of RE Invar alloy and production technique thereof.
Background technology
Invar alloy is a kind of functional materials with property, in room temperature to 230 ℃ scope, have the thermal expansivity all lower than any metallic substance, have good ductility and weldability, machining property is excellent and corrosion-resistant, can be used for the production of precision instruments such as cathode tube shadow mask and natural gas liquids basin.And the production of the functional weldment of Invar alloy, normally realize by being connected with certain alloy material, excellent properties such as high-wearing feature that the WC-Co Wimet has and high temperature red hardness connect material for the manufacturing of tool material, precision instrument provides good matrix.It is high and not yielding that Wimet has a lower thermal expansivity, hot strength, make its with process that functional materials such as Invar alloy is connected in have the incomparable advantage of other materials.The welding technique of high bonding phase WC-Co Wimet and low thermal coefficient of expansion Invar alloy is one of gordian technique that guarantees Invar alloy weldment quality and precision.
Yet, Wimet and Invar alloy performance difference are bigger, in welding process, be easy to generate big stress, make the application of weldment or assembled product be restricted, the W-Fe-C system that in welding process, causes owing to the behavior of element interface, the variation of W-Co-C system and W-Ni-C system, be easy to form crisp hard η carbide at Wimet/Invar alloy interface, and the various Invar alloy of using at present, because both sides, interface carbon profile differs greatly, can't suppress the C diffusion and promote the W-Fe-C system to form, make the heterogeneous welding of high bonding phase cemented carbide and low thermal coefficient of expansion Invar alloy need utilize certain cushioning material to realize.
Find through literature search prior art, a kind of super Invar alloy is disclosed in the Chinese patent (CN94107306.8) of Tao Zhi invention just, consisting of of this alloy: C0:0.3～0.50%, Mn≤0.6%, Ni:31.0～32.5%, Co:3～5%, Nb:0.1～0.5%, surplus: Fe and inevitable impurity element.Above-mentioned super Invar alloy is used for welding with high bonding phase cemented carbide and since its with Wimet in the C differences in concentration gradient promote the C-W-Co system to change than conference, formation fragility η carbide is so can reduce the welding joint mechanical property.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, solve Invar alloy/carbide interface Elements Diffusion behavior and easily cause the weldability difference and easily form the problem that crisp hard η carbide reduces strength of welded joint, developed a kind of new Invar alloy-RE Invar alloy NiFeCMnNbY (Y
2O
3), make it under the condition that keeps invarable effect, high concentration carbon content can suppress the formation of Wimet/Invar alloy weld interface bulk η carbide.
RE Invar alloy of the present invention is by Ni, Fe, C, Mn, Nb, Y
2O
3Form, each constituent mass mark is as follows:
Ni:30%～42%; C:0.6%～1%; Mn:3.4%; Nb:3-5%; Y
2O
3: 6-8%; Fe: surplus.
The production technique of RE Invar alloy of the present invention is: at first prepare burden according to each set of dispense ratio of described RE Invar alloy, adopt the vacuum induction melting method to carry out melting then at 1450 ℃, after treating that the formwork cast finishes, naturally cooling, last briquetting is shaped to Φ 58 bars, promptly a kind of RE Invar alloy material.
Because rare earth Nb and Y
2O
3Interpolation can realize grain refining, improve the wetting property between Invar alloy and the Wimet, therefore in the preparation of Wimet welding product, the assembling of hart metal product, in the production of high precision precision instrument, this RE Invar alloy can improve the force-bearing situation of hart metal product, thereby obtains not have welding flaw, tissue and well behaved welding joint.
Embodiment
The present invention is described in further detail and completely below in conjunction with embodiment:
Embodiment 1
At first according to Ni:30%; C:1%; Mn:3.4%; Nb:5%; Y
2O
3: 6%; Fe: surplus, carry out each component batching, carry out melting with the vacuum induction melting method at 1450 ℃ then, treat formwork cast finishing back naturally cooling, last briquetting is shaped to Φ 58 bars, promptly a kind of RE Invar alloy material.
Embodiment 2
At first according to Ni:36%; C:0.8%; Mn:3.4%; Nb:3%; Y
2O
3: 8%; Fe: surplus, carry out each component batching, carry out melting with the vacuum induction melting method at 1450 ℃ then, treat formwork cast finishing back naturally cooling, last briquetting is shaped to Φ 58 bars, promptly a kind of RE Invar alloy material.
Embodiment 3
At first according to Ni:42%; C:0.6%; Mn:3.4%; Nb:4%; Y
2O
3: 7%; Fe: surplus, carry out each component batching, carry out melting with the vacuum induction melting method at 1450 ℃ then, treat formwork cast finishing back naturally cooling, last briquetting is shaped to Φ 58 bars, promptly a kind of RE Invar alloy material.
Claims (2)
1. a RE Invar alloy is characterized in that, described RE Invar alloy is by Ni, Fe, C, Mn, Nb, Y
2O
3Form, each constituent mass mark is as follows: Ni:30%～42%; C:0.6%～1%; Mn:3.4%; Nb:3-5%; Y
2O
3: 6-8%; Fe: surplus.
2. the production technique of the described RE Invar alloy of claim 1 is characterized in that, this technology may further comprise the steps:
1) prepares burden according to each set of dispense ratio of described RE Invar alloy;
2) adopt the vacuum induction melting method to carry out melting at 1450 ℃;
3) treat that formwork cast finishes after, naturally cooling;
4) briquetting is shaped to Φ 58 bars, promptly gets a kind of RE Invar alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100401543A CN100451156C (en) | 2007-04-27 | 2007-04-27 | RE Invar alloy and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100401543A CN100451156C (en) | 2007-04-27 | 2007-04-27 | RE Invar alloy and its production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101045975A CN101045975A (en) | 2007-10-03 |
| CN100451156C true CN100451156C (en) | 2009-01-14 |
Family
ID=38770891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100401543A Expired - Fee Related CN100451156C (en) | 2007-04-27 | 2007-04-27 | RE Invar alloy and its production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100451156C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255521B (en) * | 2008-04-08 | 2010-06-16 | 上海工程技术大学 | Hard alloy connecting piece |
| CN103252577A (en) * | 2012-02-20 | 2013-08-21 | 上海工程技术大学 | Method for controlling dissolution of tungsten carbide of laser welding head interface |
| CN103273220B (en) * | 2013-06-06 | 2015-10-14 | 上海工程技术大学 | A kind of welding material connected for low coefficient of thermal expansion alloy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55122855A (en) * | 1979-03-12 | 1980-09-20 | Daido Steel Co Ltd | High strength low thermal expansion alloy |
| JPH05186853A (en) * | 1992-01-09 | 1993-07-27 | Nippon Yakin Kogyo Co Ltd | Invar alloy for shadow mask |
| CN1132956C (en) * | 1997-05-09 | 2003-12-31 | 东洋钢钣株式会社 | Color kinescope |
| CN1151306C (en) * | 2002-09-13 | 2004-05-26 | 钢铁研究总院 | High-strength low-expanded alloy structure steel material |
-
2007
- 2007-04-27 CN CNB2007100401543A patent/CN100451156C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55122855A (en) * | 1979-03-12 | 1980-09-20 | Daido Steel Co Ltd | High strength low thermal expansion alloy |
| JPH05186853A (en) * | 1992-01-09 | 1993-07-27 | Nippon Yakin Kogyo Co Ltd | Invar alloy for shadow mask |
| CN1132956C (en) * | 1997-05-09 | 2003-12-31 | 东洋钢钣株式会社 | Color kinescope |
| CN1151306C (en) * | 2002-09-13 | 2004-05-26 | 钢铁研究总院 | High-strength low-expanded alloy structure steel material |
Non-Patent Citations (4)
| Title |
|---|
| Effects of Yttrium on the Microstructures and Interfaces ina Low Expansion Superalloy. WANNG Rong－ming，HAN Ya－fang,Eliezer D.Chinese Journal of Aeronautics,Vol.14 No.3. 2001 |
| Effects of Yttrium on the Microstructures and Interfaces ina Low Expansion Superalloy. WANNG Rong－ming，HAN Ya－fang,Eliezer D.Chinese Journal of Aeronautics,Vol.14 No.3. 2001 * |
| 微量元素对低膨胀Fe-Ni基高温合金抗氧化性能的影响. 邓波，陈淦生，龙正东，林平，仲增墉.金属学报，第36卷第2期. 2000 |
| 微量元素对低膨胀Fe-Ni基高温合金抗氧化性能的影响. 邓波，陈淦生，龙正东，林平，仲增墉.金属学报，第36卷第2期. 2000 * |
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| Publication number | Publication date |
|---|---|
| CN101045975A (en) | 2007-10-03 |
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Granted publication date: 20090114 Termination date: 20110427 |