CN109825784A - A kind of heat treatment method improving GH3690 alloy medium temperature stretching plastic - Google Patents
A kind of heat treatment method improving GH3690 alloy medium temperature stretching plastic Download PDFInfo
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- CN109825784A CN109825784A CN201711182055.9A CN201711182055A CN109825784A CN 109825784 A CN109825784 A CN 109825784A CN 201711182055 A CN201711182055 A CN 201711182055A CN 109825784 A CN109825784 A CN 109825784A
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Abstract
The invention belongs to nickel-base alloy fields, are related to a kind of heat treatment method for improving GH3690 alloy tensile plasticity.It uses commercial GH3690 alloy for object, is heat-treated by commercial heat-treatment furnace, alloy is subjected to the solution heat treatment under 1065 DEG C~1075 DEG C/270~330s, finally obtains the alloy of high stretching plastic.The present invention significantly improves stretching plastic compared with alloy after timeliness, increases the preparation and working ability of alloy.The GH3690 alloy made from this method, up to 47.6% or more, reaches as high as 62.1%, has a good application prospect in inductile area.
Description
Technical field
The invention belongs to nickel-base alloy fields, are related to the method that preparation improves GH3690 alloy middle warm area stretching plastic, special
It is not the heat treatment process of GH3690 alloy.
Background technique
GH3690 (Inconel 690) alloy is a kind of austenitic nickel-based corrosion resistant alloy of 30% chromium content, it is not only
In chloride solution or sodium hydroxide solution, have more excellent than Inconel 600, Incoloy 800,304 stainless steels etc.
Different stress corrosion dehiscence resistant ability, and there are high intensity, good metallurgical stability and excellent processing characteristics, therefore
As ideal nuclear steam generator tubing.The steam generator GH3690 alloy that countries in the world today nuclear power station is selected
Tubing, importance are listed in " core level-one " component.Under the background of the positive Nuclear Power Development in China, annual 2000000 kilowatts of nuclear powers
The construction of unit at least needs to consume 350 tons of alloy pipe.
Currently, (power and the energy are used for preparation and processing that the domestic research for GH3690 alloy focuses primarily upon tubing
High-temperature structural material --- the 11st Chinese high temperature alloy nd Annual Meeting collection: thermal structure material needed for China's electric power industry development
The research of material) report.Although the preparation and processing of tubing are closely related with the plastic property of alloy itself, for heat treatment work
The research that skill is adjusted to be promoted alloy tensile performance is on the low side, the method for not yet proposing to further increase.
Applicant passes through the surprised discovery of research: GH3690 alloy being carried out to the heat treatment of certain time under certain temperature, no
Aging strengthening model is carried out, available higher alloy tensile plasticity is conducive to the promotion of alloy preparation and processing performance.Thus
It proposes: before alloy pipe prepares use, it first can be heat-treated certain time in relevant temperature, reach its plastic property
Then certain level carries out timeliness again, can both promote the processing performance of alloy, service performance is also ensured.
Summary of the invention
The technical problem to be solved by the present invention is to promote the preparation and processability of alloy by adjusting heat treatment process
Energy.Using business GH3690 alloy, by the way that alloy is carried out air-cooled heat treatment (such as Fig. 1 after 1070 DEG C of solution treatment 5min
Shown heat treating regime I), the whole draftability for being higher than solid solution plus ageing treatment (heat treating regime II as shown in Figure 1) alloy afterwards
Energy.Alloy plasticity performance made from this method, up to 47.6% or more, reaches as high as 62.1% (such as Fig. 1 institute in inductile area
Show), alloy pipe preparation and processing performance requirement are fully met, thus have a good application prospect.
The present invention prepare the method for high stretching plastic GH3690 alloy the following steps are included:
(1) raw material is done using commercialization GH3690 alloy.
(2) using commercial heat-treatment furnace.
(3) furnace temperature is risen to 1065 DEG C~1075 DEG C, the time 270~330 seconds.
(4) after the completion of after being heat-treated that sample is air-cooled.
The present invention compares possessed beneficial effect with existing result and is:
Commercialization GH3690 is used in the step (1), it is not necessary that alloy is carried out the processing of special process early period.
Common heat treatment furnace is used in the step (2), without there are special protective measures in heat treatment process.
Determine that smelting temperature is 1065 DEG C~1075 DEG C in the step (3), then cannot since temperature is lower than 1065 DEG C
Alloy is subjected to sufficient solution treatment；Temperature is higher than 1075 DEG C, it may appear that the fast growth of alloy grain size, to reduce
Alloy plasticity；It determines heat treatment time 270~330 seconds, is since lower than 270 hours, element back dissolving cannot be sufficiently complete in alloy
At being not sufficient enough to reach solid solution effect；Time is longer than 330 seconds, then causes crystallite dimension obviously to grow up.
Step (4) use is air-cooled, cooling etc. without more special water cooling, oily cold or even temperature control.
Detailed description of the invention
Fig. 1 is the GH3690 alloy after present invention heat treatment, is obtained at different temperatures using high-temperature tensile testing machine
The relationship (heat treating regime I as shown in Figure 1) of stretching plastic and temperature.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments.
The present invention prepare the method for high stretching plastic alloy the following steps are included:
(1) raw material is done using commercialization GH3690 alloy.
(2) using commercial heat-treatment furnace.
(3) furnace temperature is risen to 1065 DEG C~1075 DEG C, the time 270~330 seconds.
(4) after the completion of after being heat-treated that sample is air-cooled.
Embodiment 1
(1) commercialization GH3690 alloy pipe is used, ingredient is as shown in table 1.
| Ni | Cr | Fe | C | Si | Mn | S | Cu |
| ≥58 | 27~31 | 7~11 | ≤0.05 | ≤0.5 | ≤0.5 | ≤0.015 | ≤0.5 |
(2) using commercial heat-treatment furnace.
(3) furnace temperature is risen to 1065 DEG C~1075 DEG C, the time 270~330 seconds.
(4) after the completion of after being heat-treated that sample is air-cooled.
(5) sample after heat treatment is carried out the tension test under different temperatures to test, acquired results are as shown in Figure 1.It can
See after Overheating Treatment, alloy tensile plasticity, up to 47.6% or more, reaches as high as 62.1% in inductile area.
Claims (1)
1. a kind of heat treatment method for improving GH3690 alloy middle warm area stretching plastic, it is characterized in that the following steps are included:
(1) raw material is done using commercialization GH3690 alloy；
(2) using commercial heat-treatment furnace；
(3) furnace temperature is risen to 1065 DEG C~1075 DEG C, the time 270~330 seconds；
(4) after the completion of after being heat-treated that sample is air-cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711182055.9A CN109825784A (en) | 2017-11-23 | 2017-11-23 | A kind of heat treatment method improving GH3690 alloy medium temperature stretching plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711182055.9A CN109825784A (en) | 2017-11-23 | 2017-11-23 | A kind of heat treatment method improving GH3690 alloy medium temperature stretching plastic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109825784A true CN109825784A (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711182055.9A Pending CN109825784A (en) | 2017-11-23 | 2017-11-23 | A kind of heat treatment method improving GH3690 alloy medium temperature stretching plastic |
Country Status (1)
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877560A (en) * | 1981-11-04 | 1983-05-10 | Mitsubishi Heavy Ind Ltd | Treatment of ni alloy under heating |
| JPH11170084A (en) * | 1997-12-11 | 1999-06-29 | Mitsubishi Heavy Ind Ltd | Filler metal for ni based high cr alloy |
| CN107002182A (en) * | 2014-12-05 | 2017-08-01 | 韩国原子力研究院 | The preparation method of the ordered alloy for 690 alloys that thermal conductivity is improved and the ordered alloy by its 690 alloy being prepared from |
-
2017
- 2017-11-23 CN CN201711182055.9A patent/CN109825784A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877560A (en) * | 1981-11-04 | 1983-05-10 | Mitsubishi Heavy Ind Ltd | Treatment of ni alloy under heating |
| JPH11170084A (en) * | 1997-12-11 | 1999-06-29 | Mitsubishi Heavy Ind Ltd | Filler metal for ni based high cr alloy |
| CN107002182A (en) * | 2014-12-05 | 2017-08-01 | 韩国原子力研究院 | The preparation method of the ordered alloy for 690 alloys that thermal conductivity is improved and the ordered alloy by its 690 alloy being prepared from |
Non-Patent Citations (2)
| Title |
|---|
| 朱红 等: "固溶处理对Inconel 690合金组织影响", 《北京科技大学学报》 * |
| 王磊 等: "温度对核电用GH690合金力学行为的影响", 《中国材料进展》 * |
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Application publication date: 20190531 |