CN103614679A - Method for strengthening and toughening zirconium and zirconium alloys - Google Patents
Method for strengthening and toughening zirconium and zirconium alloys Download PDFInfo
- Publication number
- CN103614679A CN103614679A CN201310642473.7A CN201310642473A CN103614679A CN 103614679 A CN103614679 A CN 103614679A CN 201310642473 A CN201310642473 A CN 201310642473A CN 103614679 A CN103614679 A CN 103614679A
- Authority
- CN
- China
- Prior art keywords
- zirconium
- toughening
- alloy
- zirconium alloy
- strengthening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a method for strengthening and toughening zirconium and zirconium alloys. The method mainly comprises the following steps: placing Zr1-Zr5 series zirconium and zirconium alloy workpieces in a low-temperature tank filled with an ultralow-temperature cooling medium, maintaining the temperature for 12-48 hours, and then, naturally heating up to room temperature. The method disclosed by the invention is simple in operation and low in cost; and the method is particularly suitable for formed and processed product members or precision-machined workpieces.
Description
Technical field:
The present invention relates to a kind of zirconium and zirconium alloy method for toughening, particularly completed the method for toughening of be shaped processing or accurately machined zirconium and zirconium alloy member.
Background technology:
Industrial pure zirconium and alloy thereof are the important structure materials of nuclear industry, are also outstanding chemical industry corrosion resistance structure materials simultaneously.Under zirconium and zirconium alloy room temperature, be close-packed hexagonal type α phase constitution, the room temperature tensile strength of its annealed state is 380MPa, yield strength 205MPa, and unit elongation is greater than 16%.The methods such as general grain refining or working hardening are all applicable to this type of alloy.Yet aforesaid method, when improving zirconium and zirconium alloy intensity, all can be lost its part plasticity.Meanwhile, for those, complete be shaped processing or accurately machined member, for guaranteeing dimensional precision, can not adopt these methods further to strengthen.
Summary of the invention:
The object of the present invention is to provide and a kind ofly can after zirconium and zirconium alloy product complete be shaped processing or precision work, improve its yield strength and tensile strength plasticity remains unchanged zirconium and zirconium alloy method for toughening simultaneously.
The present invention is placed in zirconium and zirconium alloy under ultra-low temperature surroundings, to carry out sub-zero treatment, and then reaches and improve zirconium and zirconium alloy intensity makes it highly malleablized, the object that simultaneously keeps plasticity not decline.
Concrete technical scheme of the present invention is: by zirconium and the zirconium alloy workpiece of Zr1～Zr5 trade mark (GB/T8767-1988) series, preferably structural state is for returning state, be placed in the cryostat, that the cooling dielectric fluid nitrogen of very low temperature or liquid helium be housed and be incubated 12～48 hours, then naturally heat up and make room temperature.
Above-mentioned processing method principle is: very low temperature sub-zero treatment meeting causes that zirconium and zirconium alloy are because of volumetric shrinkage, and then introduces the dislocation of some amount, causes its matrix hardness to increase; These dislocations that prestore, in tensile deformation process subsequently, cause strength enhancing with newly-generated dislocation interaction, keep higher tension strain cementation index simultaneously, and then obtain high unit elongation.In addition, this sub-zero treatment also causes that grain orientation is tending towards preferred orientation, and it has certain effect to the improvement of zirconium and zirconium alloy bulk strength and plasticity also tool.
The present invention compares tool with existing various method for toughening and has the following advantages:
1, simple to operate, cost is low.
2, be particularly suitable for the product members that those have been shaped and have machined, or the workpiece that completes of precision work.
Accompanying drawing explanation:
Fig. 1 is the figure of tissue topography of Zr1 alloy annealed state.
Fig. 2 is the Hardness Distribution characteristic pattern before the sub-zero treatment of Zr1 alloy.
Fig. 3 is the Hardness Distribution characteristic pattern after the sub-zero treatment of Zr1 alloy.
Fig. 4 is the grain orientation variation diagram before the sub-zero treatment of Zr1 alloy.
Fig. 5 is the grain orientation variation diagram after the sub-zero treatment of Zr1 alloy.
Fig. 6 is the tensile property comparison diagram before and after the sub-zero treatment of Zr1 alloy.
Embodiment:
The Zr1 alloy that is 3mm by thickness, its structural state is annealed state, as shown in Figure 1, is placed in the cryostat, that liquid nitrogen is housed, liquid nitrogen surface will be incubated after 24 hours higher than processed workpiece, takes out nature and is warming up to room temperature.Then detect, from Fig. 2 and Fig. 3, process the Hardness Distribution contrast of front and back, sub-zero treatment has improved the hardness of matrix.Before and after processing from Fig. 4 and Fig. 5, grain orientation variation diagram can be found out, the rotation of <0001> preferred orientation occurs crystal grain.From Fig. 6, processing the tensile property comparison diagram of front and back can find out, tensile yield and tensile strength after processing are all improved, and keeps higher unit elongation.
Claims (4)
1. zirconium and a zirconium alloy method for toughening, is characterized in that: by the zirconium of Zr1～Zr5 series and zirconium alloy workpiece, be placed in the cryostat, that the cooling medium of very low temperature is housed and be incubated 12～48 hours, be then naturally warming up to room temperature.
2. a kind of zirconium according to claim 1 and zirconium alloy method for toughening, is characterized in that: described cryogenic media is liquid nitrogen or liquid helium.
3. a kind of zirconium according to claim 2 and zirconium alloy method for toughening, is characterized in that: described zirconium and zirconium alloy are Zr1～Zr5 trade mark GB/T8767-1988.
4. a kind of zirconium according to claim 3 and zirconium alloy method for toughening, is characterized in that: described zirconium and zirconium alloy structural state are annealed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310642473.7A CN103614679A (en) | 2013-12-03 | 2013-12-03 | Method for strengthening and toughening zirconium and zirconium alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310642473.7A CN103614679A (en) | 2013-12-03 | 2013-12-03 | Method for strengthening and toughening zirconium and zirconium alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103614679A true CN103614679A (en) | 2014-03-05 |
Family
ID=50165393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310642473.7A Pending CN103614679A (en) | 2013-12-03 | 2013-12-03 | Method for strengthening and toughening zirconium and zirconium alloys |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103614679A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032073A (en) * | 1987-07-27 | 1989-03-29 | 低温学国际公司 | A kind of apparatus and method that are used for multiple material is carried out sub-zero treatment |
| CN201183810Y (en) * | 2008-02-15 | 2009-01-21 | 王绍钢 | Ultra low temperature deep cold treatment apparatus |
| CN101824585A (en) * | 2010-05-14 | 2010-09-08 | 江苏大学 | Cold treatment method for preparing high-toughness metal-base composite material |
-
2013
- 2013-12-03 CN CN201310642473.7A patent/CN103614679A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032073A (en) * | 1987-07-27 | 1989-03-29 | 低温学国际公司 | A kind of apparatus and method that are used for multiple material is carried out sub-zero treatment |
| CN201183810Y (en) * | 2008-02-15 | 2009-01-21 | 王绍钢 | Ultra low temperature deep cold treatment apparatus |
| CN101824585A (en) * | 2010-05-14 | 2010-09-08 | 江苏大学 | Cold treatment method for preparing high-toughness metal-base composite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103924180B (en) | A kind of heat treating method of TC18 titanium alloy | |
| CN103525998B (en) | Normalizing rolling type close grain pressure welding steel pipe Wide and Heavy Plates | |
| CN103103459B (en) | Large-scale forging and manufacture process wind electricity slewing bearing forging and manufacturing process | |
| KR101334897B1 (en) | The manufacturing method of the high strength processed goods using the cold forging method | |
| CN108796313B (en) | Al-Mg-Si series wrought aluminum alloy and strengthening and toughening treatment method thereof | |
| CN104480415A (en) | Processing process of difficult-to-deform high temperature alloy GH141 cold-drawn material | |
| CN103934642B (en) | A kind of steel cold-extrusion technology | |
| CN109023180A (en) | The ageing hot processing method of 7 line aluminium alloys | |
| Lu et al. | Microstructure evolution and corrosion behavior of the novel maraging stainless steel manufactured by selective laser melting | |
| CN106148862B (en) | Large cylindrical tubular aluminium alloy castings creep ageing heat treatment method | |
| CN106834985A (en) | A kind of thermo-mechanical treatment process for significantly improving aluminium zinc magnesium alloy combination property | |
| CN104630434B (en) | The superplastic method of 304 stainless steels is realized using martensitic traoformation circulation | |
| CN102925835A (en) | High-temperature alloy stress-removing aging process method | |
| CN105648369A (en) | Thermal treatment method for 7005 aluminum alloy | |
| CN106893813B (en) | It is degenerated based on deformation twin and realizes the superplastic method of TWIP steel | |
| CN103614679A (en) | Method for strengthening and toughening zirconium and zirconium alloys | |
| CN104762572A (en) | Stress relieving process of hard alloy | |
| CN103993141A (en) | Spheroidizing annealing process for high-toughness medium carbon steel wires | |
| CN105014201A (en) | Repair welding method performed through pressurized water reactor nuclear grade casting dissimilar material | |
| CN103215427A (en) | Heat treatment process of gauge block made of bearing steel | |
| CN104726660A (en) | Forging method for increasing corrosion resistance of 316 LN stainless steel | |
| CN106756690B (en) | The secondary heat treatment technique of Ti-20V-4Al-1Sn beta titanium alloys after melting once molding | |
| CN103627880B (en) | Modulus is in the mid-frequency induction hardening technique of the heavily loaded tooth bar of 50mm≤m≤150mm | |
| CN103938136B (en) | A kind of titanium alloy quasi recrystallization annealing process | |
| CN105296799A (en) | TC11 titanium alloy and technique for optimizing performance of TC11 titanium alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140305 |