CN104328268A - Heat treatment technology of 0Cr17Ni7Al cold-rolled sheet blank - Google Patents
Heat treatment technology of 0Cr17Ni7Al cold-rolled sheet blank Download PDFInfo
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- CN104328268A CN104328268A CN201410605432.5A CN201410605432A CN104328268A CN 104328268 A CN104328268 A CN 104328268A CN 201410605432 A CN201410605432 A CN 201410605432A CN 104328268 A CN104328268 A CN 104328268A
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Abstract
The invention provides a heat treatment technology of 0Cr17Ni7Al cold-rolled sheet blank. The heat treatment technology comprises the steps of solution treatment, adjustment treatment and aging treatment, wherein the step of solution treatment comprises the steps of keeping the temperature of 1060 DEG C+/- 10 DEG C for 20min and then performing air cooling; the step of adjustment treatment comprises the steps of keeping the temperature of 760 DEG C +/- 10 DEG C for 90min and then cooling; the step of aging treatment comprises the steps of keeping the temperature of 565 DEG C+/-10 DEG C for 90min and then performing air cooling, wherein the cooling manner in the adjustment treatment is water cooling. The cooling method after the adjustment treatment has large influence on the hardness of the 0Cr17Ni7Al cold-rolled sheet, and the stabilization of austenite is generated in texture after adjustment treatment, and therefore, the martensitic transformation occurs on the austenite as much as possible; high hardness can be achieved by the aging treatment, and the hardness is stabilized between 40 HRC and 42 HRC. The operation of performing cooling after adjustment treatment is convenient through verification of practical production, and besides, the cost of running water is low, and the production cycle can be shortened.
Description
Technical field
The invention belongs to alloyed aluminium variable technical field of heat treatment, particularly relate to a kind of 0Cr17Ni7Al cold rolled sheet blank thermal treatment process.
Background technology
Semiaustenitic type PH Stainless Steel 0Cr17Ni7Al, after solution treatment, Ms point is lower than room temperature, directly can not be transformed into martensite, need to improve more than its Ms point to constant temperature through adjustment process, be commonly considered as by austenite carbide precipitate, complete martensitic transformation during cooling, then by ageing treatment, the satiety compound be dissolved in martensite separated out and cause sclerosis, thus meet the requirements of intensity and hardness.0Cr17Ni7Al cold rolled sheet normative heat treatment technique generally has two kinds: air cooling after (1) solution treatment 1060 DEG C ± 10 DEG C insulation 20min, air cooling after adjustment process 760 DEG C ± 10 DEG C insulation 90min, air cooling after ageing treatment 565 DEG C ± 10 DEG C insulation 90min.(2) air cooling after solution treatment 1060 DEG C ± 10 DEG C insulation 20min, air cooling after adjustment process 955 DEG C ± 5 DEG C insulation 10min, deepfreeze-70 DEG C ~-80 DEG C keeps 8h, air cooling after ageing treatment 510 DEG C ± 10 DEG C insulation 60min.
Because above-mentioned (2) plants heat treatment process complexity, the cycle is long, and add subzero temperature case deepfreeze operation, cost is relatively high, does not therefore generally adopt.The thermal treatment process that we select is, solution treatment adopts high temperature box type resistance furnace heating, and to warm fed to boiler, after solution treatment, hardness is not more than 31.5HRC.Because after solution treatment, thin plate has distortion, case after adjustment is processed into stokehold fixture clamping, and cover with iron filings, object is in order in heat-processed, shield jig is not oxidized; After insulation terminates, chest is come out of the stove below air cooling to 150 DEG C and is taken out fixture, after being chilled to room temperature; Again part being entered together with fixture pit furnace and carries out ageing treatment, from taking out fixture air cooling in stove to room temperature after heating and thermal insulation terminates, finally unclamping fixture,
For the 0Cr17Ni7Al cold rolled sheet blank of machining clamp spring on certain product, blank size 215mm × 215mm, thickness is 0.8mm, and its heat treatment hardness requires to be not less than 39.5HRC.In process of production, find thin plate after heat treatment, hardness value is unstable, time have the situation of hardness deficiency to occur, and between different batches hardness value gap comparatively greatly, maximum disparity 10HRC (time minimum, 31HRC, reaches as high as 41HRC).Because jump ring needs higher elasticity, hardness is too low, and elasticity does not reach requirement, does not allow to use, and therefore needs to improve thermal treatment process to stablize its hardness, improves product thermal treatment quality.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of 0Cr17Ni7Al cold rolled sheet blank thermal treatment process, this 0Cr17Ni7Al cold rolled sheet blank thermal treatment process adopts water-cooled to carry out by the type of cooling of adjustment process, the intensity of thin plate can be strengthened, keep good hardness and ductility simultaneously.
The present invention is achieved by the following technical programs.
A kind of 0Cr17Ni7Al cold rolled sheet blank thermal treatment process provided by the invention, comprise solution treatment, adjustment process and ageing treatment, wherein air cooling after solution treatment 1060 DEG C ± 10 DEG C insulation 20min, cool after adjustment process 760 DEG C ± 10 DEG C insulation 90min, air cooling after ageing treatment 565 DEG C ± 10 DEG C insulation 90min, the type of cooling wherein adjusting process adopts water-cooled.
Further, the mode of described water-cooled is for cool with tap water.
Further, described tap water temperature ensures at 0 ~ 15 DEG C.
Further, described tap water temperature ensures at 0 ~ 10 DEG C.
Beneficial effect of the present invention is: the hardness impact of the method for cooling after adjustment process on 0Cr17Ni7Al cold rolled sheet is very large, after adjustment process, tissue generation stabilization of austenite makes austenite as much as possible martensitic transformation occur, ageing treatment obtains higher hardness, and hardness is all stabilized between 40 ~ 42HRC.Verify in actual production, adopt the method for the rear water-cooled of adjustment process easy to operate, and tap water is with low cost, and can the production cycle be shortened.
Accompanying drawing explanation
Fig. 1 process curve figure of the present invention.
Embodiment
Further describe technical scheme of the present invention below, but described in claimed scope is not limited to.
Present embodiments provide a kind of 0Cr17Ni7Al cold rolled sheet blank thermal treatment process, technique is: air cooling after solution treatment 1060 DEG C ± 10 DEG C insulation 20min, water-cooled after adjustment process 760 DEG C ± 10 DEG C insulation 90min, air cooling after ageing treatment 565 DEG C ± 10 DEG C insulation 90min.Process curve as shown in Figure 1.
Solid solution treatment process is constant; fixture is eliminated when adjusting process; and make air cooling into water-cooled; the reason cancelling fixture is because must case shield jig when heating at 760 DEG C ± 10 DEG C temperature; not easily take out in case because temperature is higher when coming out of the stove; and if carrying jig water-cooled, fixture is easily caused to be out of shape.When ageing treatment just on fixture, then use well formula resistance furnace 565 DEG C ± 10 DEG C to be incubated air cooling after 90min.
In above-mentioned adjustment treatment process, described water-cooled adopts tap water cooling, simultaneously, further, described tap water temperature controls at 0 ~ 15 DEG C, and its principle is: when carrying out adjustment process in 700 DEG C ~ 800 DEG C temperature ranges, because the incubation period of Carbide Precipitation is very short, speed of separating out and amount of precipitation greatly, raise so Ms point is obvious when cooling.By finding in actual production, add ageing treatment under 760 DEG C of adjustment process air cooling conditions after, thin plate hardness has bright rising, but adopts water-cooling pattern higher than the hardness after air cooling after adjustment process, this is mainly because this steel is after solution treatment, room temperature texture is austenite, and when being heated to 760 DEG C of adjustment process, carbide is separated out from γ phase, γ phase becomes unstable, because the rising of Ms point, just changes martensite into during cooling, Ms point can be made to reach 52 DEG C ~ 93 DEG C by adjustment process.In order to complete martensitic transformation, reaching maximum hardening effect, as far as possible low temperature should be cooled to after adjustment process, it is generally acknowledged and should be cooled to less than 15 DEG C.But in actual production, temperature often has the situation higher than more than 15 DEG C, and thin plate speed of cooling in case is slow, when taking out fixture employing air cooling, actual speed of cooling is also by the influence of temperature change that air flowing and season cause, and very difficult guarantee is cooled to less than 15 DEG C, and room temperature is just in time in Ms ~ Mf temperature range, can make thin plate in process of cooling, produce stabilization of austenite phenomenon like this, make austenite as much as possible martensitic transformation can not occur, do not reach desirable hardening effect.Therefore, thin plate is cancelled fixture when adjusting process and with tap water cooling, just can effectively avoid ambient conditions to affect, make it reach less than 15 DEG C very soon.More stable owing to making coolant temperature with tap water, speed of cooling is by temperature, room temperature and the how many impact of part are all less than air cooling, after making adjustment process, thin plate inside is as cold as lesser temps very soon and martensitic transformation occurs, obtain higher hardness (40 ~ 42HRC) after ageing treatment, and different batches hardness is even.
Further, tap water temperature is controlled at 0 ~ 10 DEG C, make its thin plate reach less than 15 DEG C very soon.
Claims (4)
1. a 0Cr17Ni7Al cold rolled sheet blank thermal treatment process, comprise solution treatment, adjustment process and ageing treatment, wherein air cooling after solution treatment 1060 DEG C ± 10 DEG C insulation 20min, cool after adjustment process 760 DEG C ± 10 DEG C insulation 90min, air cooling after ageing treatment 565 DEG C ± 10 DEG C insulation 90min, is characterized in that: the type of cooling of adjustment process adopts water-cooled.
2. 0Cr17Ni7Al cold rolled sheet blank thermal treatment process as claimed in claim 1, is characterized in that: the mode of described water-cooled is for cool with tap water.
3. 0Cr17Ni7Al cold rolled sheet blank thermal treatment process as claimed in claim 2, is characterized in that: described tap water temperature ensures at 0 ~ 15 DEG C.
4. 0Cr17Ni7Al cold rolled sheet blank thermal treatment process as claimed in claim 2 or claim 3, is characterized in that: described tap water temperature ensures at 0 ~ 10 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410605432.5A CN104328268A (en) | 2014-10-30 | 2014-10-30 | Heat treatment technology of 0Cr17Ni7Al cold-rolled sheet blank |
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| CN201410605432.5A CN104328268A (en) | 2014-10-30 | 2014-10-30 | Heat treatment technology of 0Cr17Ni7Al cold-rolled sheet blank |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109797270A (en) * | 2018-11-30 | 2019-05-24 | 中国航发贵州红林航空动力控制科技有限公司 | The method of semiaustenitic precipitation-hardening stainless steel 0Cr17Ni7Al raising quenching hardness |
| CN111485092A (en) * | 2020-06-01 | 2020-08-04 | 嘉善永鑫紧固件有限公司 | Elastic gasket and preparation method and application thereof |
| CN115255810A (en) * | 2022-04-28 | 2022-11-01 | 三河建华高科有限责任公司 | Processing technique method of current collecting disc in CMP equipment |
| CN119736463A (en) * | 2025-03-05 | 2025-04-01 | 上海开维喜阀门有限公司 | Heat treatment method for improving low-temperature impact toughness of 630 material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103276302A (en) * | 2013-06-14 | 2013-09-04 | 兰州理工大学 | High-alumina 17-7 PH stainless steel and preparation method thereof |
| CN103866198A (en) * | 2012-12-17 | 2014-06-18 | 中国科学院金属研究所 | Precipitation-hardening martensitic stainless steel for surgical operation and heat treatment process thereof |
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- 2014-10-30 CN CN201410605432.5A patent/CN104328268A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103866198A (en) * | 2012-12-17 | 2014-06-18 | 中国科学院金属研究所 | Precipitation-hardening martensitic stainless steel for surgical operation and heat treatment process thereof |
| CN103276302A (en) * | 2013-06-14 | 2013-09-04 | 兰州理工大学 | High-alumina 17-7 PH stainless steel and preparation method thereof |
Non-Patent Citations (1)
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| 冯光勇等: "17-7PH的热处理工艺", 《金属加工（热加工）》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109797270A (en) * | 2018-11-30 | 2019-05-24 | 中国航发贵州红林航空动力控制科技有限公司 | The method of semiaustenitic precipitation-hardening stainless steel 0Cr17Ni7Al raising quenching hardness |
| CN111485092A (en) * | 2020-06-01 | 2020-08-04 | 嘉善永鑫紧固件有限公司 | Elastic gasket and preparation method and application thereof |
| CN111485092B (en) * | 2020-06-01 | 2021-04-30 | 嘉善永鑫紧固件有限公司 | Elastic gasket and preparation method and application thereof |
| CN115255810A (en) * | 2022-04-28 | 2022-11-01 | 三河建华高科有限责任公司 | Processing technique method of current collecting disc in CMP equipment |
| CN115255810B (en) * | 2022-04-28 | 2024-05-14 | 三河建华高科有限责任公司 | Processing technique of current collecting disc in CMP equipment |
| CN119736463A (en) * | 2025-03-05 | 2025-04-01 | 上海开维喜阀门有限公司 | Heat treatment method for improving low-temperature impact toughness of 630 material |
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Application publication date: 20150204 |