CN101323901A - Austenitic stainless steel as-forged solid solution treatment process after forging - Google Patents
Austenitic stainless steel as-forged solid solution treatment process after forging Download PDFInfo
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- CN101323901A CN101323901A CNA2007100938591A CN200710093859A CN101323901A CN 101323901 A CN101323901 A CN 101323901A CN A2007100938591 A CNA2007100938591 A CN A2007100938591A CN 200710093859 A CN200710093859 A CN 200710093859A CN 101323901 A CN101323901 A CN 101323901A
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Abstract
The invention discloses a solution treatment technology of austenite stainless as-forged after forging. Initial forging temperature in the forging technology is 1100 DEG C to 1200 DEG C and final forging temperature is more than or equal to 850 DEG C, and forging ratio of forge pieces is more than or equal to 3. Deformation amount of the forge pieces at the final heating is more than or equal to 20 percent; after the forging technology, the forge pieces are immediately heated in a furnace and the temperature is increased to the solutionizing temperature of 1000 DEG C to 1100 DEG C as soon as possible and heat is preserved for 1 hour to 4 hours, and then the forge pieces are taken out of the furnace and put into a water tank at once for cooling to reach the room temperature. After the technology of the solution treatment is completed, the following steps of rough treatment, sampling and physical chemical testing are carried out. By adopting the solution treatment technology of austenite stainless as-forged after forging, the solution treatment immediately starts and the temperature rapidly increases. Furthermore, the technology of the invention has simple operation, low cost, short processing time and low energy consumption. When the solutionizing treatment is carried out on austenite stainless forge pieces with large section and tonnage, the size of crystalline grain does not increase.
Description
Technical field
The present invention relates to a kind of treatment process of forging, especially a kind of large section, large-tonnage austenitic stainless steel as-forged solid solution treatment process after forging of being applicable to.
Background technology
Traditional austenite stainless steel forgings solutionizing treatment process method is carried out after roughing.Forging small cross-section, little tonnage is short in the solutionizing temperature time in stage, the grain growth tendency is little, and large section, large-tonnage forging are long in the solutionizing temperature time in stage, grain fineness number is grown up tendency greatly, experiment shows that the austenite stainless steel forgings is more than 1050 ℃ of solutionizing temperature reach, insulation surpassed after 4 hours, and crystal grain begins to grow up.The flow process of existing austenite stainless steel forgings solid solution treatment process as shown in Figure 1, after forging and pressing earlier with the forging air cooling to room temperature, carry out roughing then, carry out solution treatment again, sampling afterwards, physics and chemistry are tested last qualified warehouse-in.Wherein, the step of solution treatment is begun forging as shown in Figure 2 by room temperature, is warming up to 1000 ℃～1100 ℃ of solutionizing temperature with the speed of 60 ℃/h, soaking then, insulation 2h/100mm, and last shrend is to room temperature.In this technology, owing to be warming up to the process of solutionizing temperature from room temperature again after forging postcooling and roughing, alloy carbide Cr23C6 all can separate out (C in the chemical ingredients≤0.03% or contain Nb, Ti element, be warming up to the solutionizing temperature course from room temperature and can not separate out alloy carbide Cr23C6) on crystal boundary.Just can make alloy carbide dissolve in crystal grain again under the solutionizing temperature, as solutionizing temperature stage soaking time deficiency, the solid solution effect is bad; the corrosion resistance nature of this forging will be reduced; oversize as solutionizing temperature soaking time, crystal grain can be grown up, and can reduce the mechanical property of this forging.Therefore the control length of large section, the soaking time of large-tonnage austenite stainless steel forgings under the solutionizing temperature is a double-barreled question always.Now; along with product cross section, tonnage are increasing; for guaranteeing good mechanical properties and best corrosion resistance nature; product is higher to grain fineness number and solid solution effect requirements; this just requires the austenitic stainless steel forging after solutionizing is handled (especially large section, large-tonnage); crystal grain is not grown up, and guarantees that mechanical property is qualified and can obtain best corrosion resistance nature.
Summary of the invention
Technical problem to be solved by this invention provides a kind of austenitic stainless steel as-forged solid solution treatment process after forging, it is simple to operate, and is with low cost, and the process-cycle is short, when large section, large-tonnage austenite stainless steel forgings were carried out the solutionizing processing, grain fineness number was not grown up.
For solving the problems of the technologies described above, the technical scheme of austenitic stainless steel as-forged solid solution treatment process after forging of the present invention is, initial forging temperature is 1100 ℃～1200 ℃ in forging process, final forging temperature is more than or equal to 850 ℃, the forging ratio of forging is more than or equal to 3, and last forging deflection of fiery time is more than or equal to 20%; Advance the stove heating after the forging process immediately, as quickly as possible temperature is risen to 1000 ℃～1100 ℃ of solutionizing temperature, be incubated 1～4 hour then, forging being come out of the stove again and entering water tank immediately is cooled to room temperature, solid solution treatment process finishes, and carries out the step of roughing afterwards, sampling, physics and chemistry test.
Austenitic stainless steel as-forged solid solution treatment process after forging of the present invention will begin in a minute solid solution craft after forging, and be rapidly heated, it is simple to operate, with low cost, process-cycle is short, energy consumption is few, and when large section, large-tonnage austenite stainless steel forgings were carried out the solutionizing processing, grain fineness number was not grown up.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and Examples:
Fig. 1 is the schema of existing austenitic stainless steel as-forged solid solution treatment process after forging;
Fig. 2 is the temperature-time curve figure of existing austenitic stainless steel as-forged solid solution treatment process after forging;
Fig. 3 is the schema of austenitic stainless steel as-forged solid solution treatment process after forging of the present invention;
Fig. 4 is the temperature-time curve figure of austenitic stainless steel as-forged solid solution treatment process after forging of the present invention.
Embodiment
The flow process of austenitic stainless steel as-forged solid solution treatment process after forging of the present invention can be referring to shown in Figure 3, at first carry out the forging of forging, initial forging temperature is 1100 ℃～1200 ℃ in forging process, final forging temperature is more than or equal to 850 ℃, the occurrence of above-mentioned initial forging temperature and final forging temperature is determined by the material of each austenite stainless steel forgings, the forging ratio of forging is more than or equal to 3, and last forging deflection of fiery time is more than or equal to 20%; Forging completes, physical dimension is qualified carries out solution treatment to forging afterwards, as shown in Figure 4, wherein during finish-forging furnace temperature more than or equal to 900 ℃, behind finish-forging, forging is not cooled to room temperature, but advance the stove heating immediately, as quickly as possible temperature is risen to 1000 ℃～1100 ℃ of solutionizing temperature, the speed that heats up when advancing the stove heating is more than or equal to 80 ℃/h, because the temperature of separating out of alloy carbide Cr23C6 makes 400 ℃～850 ℃, therefore forging is rapidly heated behind finish-forging immediately, can farthest avoid separating out of alloy carbide Cr23C6, and save the energy; Be incubated 1～4 hour then, described soaking time determines with the size in forging cross section, described forging section area is big more, described soaking time is just long more, and this is in order to eliminate forging work hardening and to make the abundant recrystallize of crystal grain, compared with prior art, soaking time is shorter relatively, and the better effects if of solid solution has been saved the energy, and has shortened the production cycle; Forging being come out of the stove again and entering water tank immediately is cooled to room temperature, and solid solution treatment process finishes, and carries out the step of roughing afterwards, sampling, physics and chemistry test, last qualified warehouse-in.
In sum, austenitic stainless steel as-forged solid solution treatment process after forging of the present invention makes solid solution craft can be widely used in the austenite stainless steel forgings solution treatment of all size cross section, various technological standards.Grain fineness number, corrosion resistance nature have all reached the examination of technological standard, and qualification rate is very high.This solutionizing treatment process is stable, thereby simplified control, save energy, shortening production cycle reach the purpose of accelerating output.
Claims (3)
1. austenitic stainless steel as-forged solid solution treatment process after forging, it is characterized in that initial forging temperature is 1100 ℃～1200 ℃ in forging process, final forging temperature is more than or equal to 850 ℃, the forging ratio of forging is more than or equal to 3, and last forging deflection of fiery time is more than or equal to 20%; Advance the stove heating after the forging process immediately, as quickly as possible temperature is risen to 1000 ℃～1100 ℃ of solutionizing temperature, be incubated 1～4 hour then, forging being come out of the stove again and entering water tank immediately is cooled to room temperature, and solid solution treatment process finishes.
2. austenitic stainless steel as-forged solid solution treatment process after forging according to claim 1 is characterized in that, described soaking time determines that with the size in forging cross section described forging section area is big more, and described soaking time is just long more.
3. austenitic stainless steel as-forged solid solution treatment process after forging according to claim 1 is characterized in that, the speed that heats up when advancing the stove heating is more than or equal to 80 ℃/h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710093859A CN100584963C (en) | 2007-06-12 | 2007-06-12 | Austenitic stainless steel as-forged solid solution treatment process after forging |
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| CN200710093859A CN100584963C (en) | 2007-06-12 | 2007-06-12 | Austenitic stainless steel as-forged solid solution treatment process after forging |
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| CN101323901A true CN101323901A (en) | 2008-12-17 |
| CN100584963C CN100584963C (en) | 2010-01-27 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831535B (en) * | 2009-03-12 | 2012-10-03 | 上海重型机器厂有限公司 | Heat treatment method after forging of ultra-supercritical high and medium pressure rotor steel |
| CN102828009A (en) * | 2011-06-17 | 2012-12-19 | 上海重型机器厂有限公司 | Forging method of austenitic stainless steel forged piece for in-reactor component of nuclear power station reactor |
| CN103014575A (en) * | 2012-12-26 | 2013-04-03 | 洛阳双瑞特种装备有限公司 | Forging method for increasing corrosion resistance of Ti-containing corrosion resistant alloy forging |
| CN105936963A (en) * | 2016-06-30 | 2016-09-14 | 安徽省瑞杰锻造有限责任公司 | Stainless steel forge piece forging technology |
| CN106567009A (en) * | 2015-10-10 | 2017-04-19 | 江苏锦越航空合金材料有限公司 | High-temperature-resistant corrosion-resistant stainless steel and production method thereof |
| CN106567010A (en) * | 2015-10-10 | 2017-04-19 | 江苏锦越航空合金材料有限公司 | Corrosion-resistant stainless steel and production method thereof |
| CN106670363A (en) * | 2016-12-20 | 2017-05-17 | 上海新闵重型锻造有限公司 | Manufacturing method for high-strength stainless steel forge piece |
| CN107974542A (en) * | 2017-10-24 | 2018-05-01 | 昆明理工大学 | A kind of grain refining preparation method of nickel-saving type two phase stainless steel |
| CN114184536A (en) * | 2021-11-04 | 2022-03-15 | 苏州热工研究院有限公司 | Method for analyzing thermal aging and amplitude modulation decomposition condition of ferrite |
-
2007
- 2007-06-12 CN CN200710093859A patent/CN100584963C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831535B (en) * | 2009-03-12 | 2012-10-03 | 上海重型机器厂有限公司 | Heat treatment method after forging of ultra-supercritical high and medium pressure rotor steel |
| CN102828009A (en) * | 2011-06-17 | 2012-12-19 | 上海重型机器厂有限公司 | Forging method of austenitic stainless steel forged piece for in-reactor component of nuclear power station reactor |
| CN103014575A (en) * | 2012-12-26 | 2013-04-03 | 洛阳双瑞特种装备有限公司 | Forging method for increasing corrosion resistance of Ti-containing corrosion resistant alloy forging |
| CN103014575B (en) * | 2012-12-26 | 2014-11-05 | 洛阳双瑞特种装备有限公司 | Forging method for increasing corrosion resistance of Ti-containing corrosion resistant alloy forging |
| CN106567010A (en) * | 2015-10-10 | 2017-04-19 | 江苏锦越航空合金材料有限公司 | Corrosion-resistant stainless steel and production method thereof |
| CN106567009A (en) * | 2015-10-10 | 2017-04-19 | 江苏锦越航空合金材料有限公司 | High-temperature-resistant corrosion-resistant stainless steel and production method thereof |
| CN105936963A (en) * | 2016-06-30 | 2016-09-14 | 安徽省瑞杰锻造有限责任公司 | Stainless steel forge piece forging technology |
| CN106670363A (en) * | 2016-12-20 | 2017-05-17 | 上海新闵重型锻造有限公司 | Manufacturing method for high-strength stainless steel forge piece |
| CN106670363B (en) * | 2016-12-20 | 2018-08-28 | 上海新闵重型锻造有限公司 | A kind of manufacturing method of high-strength stainless steel forgings |
| CN107974542A (en) * | 2017-10-24 | 2018-05-01 | 昆明理工大学 | A kind of grain refining preparation method of nickel-saving type two phase stainless steel |
| CN107974542B (en) * | 2017-10-24 | 2019-07-16 | 昆明理工大学 | A kind of grain refining preparation method of nickel-saving type two phase stainless steel |
| CN114184536A (en) * | 2021-11-04 | 2022-03-15 | 苏州热工研究院有限公司 | Method for analyzing thermal aging and amplitude modulation decomposition condition of ferrite |
| CN114184536B (en) * | 2021-11-04 | 2023-05-30 | 苏州热工研究院有限公司 | Analysis method for ferrite thermal aging amplitude modulation decomposition condition |
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|---|---|
| CN100584963C (en) | 2010-01-27 |
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