CN103817277B - The boiler-steam dome manufacture method of 13MnNiMo5-4 cylinder forgings - Google Patents
The boiler-steam dome manufacture method of 13MnNiMo5-4 cylinder forgings Download PDFInfo
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- CN103817277B CN103817277B CN201210470099.2A CN201210470099A CN103817277B CN 103817277 B CN103817277 B CN 103817277B CN 201210470099 A CN201210470099 A CN 201210470099A CN 103817277 B CN103817277 B CN 103817277B
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Abstract
The invention discloses a kind of manufacture method of boiler-steam dome 13MnNiMo5-4 cylinder forgings, be not less than 2000mm for the manufacture of external diameter, internal diameter is not less than 1500mm, and length is not less than the boiler-steam dome 13MnNiMo5-4 cylinder forgings of 2500mm; Comprise the following steps: the first step, forging base; Second step, heat treatment after forging; 3rd step, property heat treatment.The present invention adopts the solid forging of vacuum metling steel ingot to form, then impose and carry out dry quenching Technology for Heating Processing, compared with the boiler-steam dome cylinder forgings obtained welds cylindrical shell with the roll of steel plate of routine, mechanical property is better than similar steel plate and rolls product, without obvious anisotropy, and lacked the weld seam of a longitudinal direction, the margin of safety of whole equipment can be improved.
Description
Technical field
The present invention relates to a kind of manufacture method of boiler-steam dome, be specifically related to a kind of manufacture method of boiler-steam dome 13MnNiMo5-4 cylinder forgings.
Background technology
Boiler-steam dome (also known as drum) is most important pressure parts in natural circulation boiler, is common in 300MW and following thermoelectricity generating set.Boiler-steam dome generally adopts 13MnNiMo5-4 steel plate to roll and is welded, and the performance requirement of 13MnNiMo5-4 steel plate is as follows:
The shortcoming of 13MnNiMo5-4 steel plate is as follows:
1,13MnNiMo5-4 steel plate anisotropy after rolling is obvious, and namely longitudinal performance is significantly better than lateral performance;
There is longitudinal weld seam in the drum that 2, roll of steel plate is welded, is disadvantageous from the security standpoint of whole equipment.
13MnNiMo5-4 forging is not still adopted to manufacture the precedent of boiler-steam dome cylindrical shell at present.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of manufacture method of boiler-steam dome 13MnNiMo5-4 cylinder forgings, and it can obtain the more excellent boiler-steam dome cylinder forgings of mechanical property.
For solving the problems of the technologies described above, the technical solution of the manufacture method of boiler-steam dome 13MnNiMo5-4 cylinder forgings of the present invention is:
Be not less than 2000mm for the manufacture of external diameter, internal diameter is not less than 1500mm, and length is not less than the boiler-steam dome 13MnNiMo5-4 cylinder forgings of 2500mm; Comprise the following steps:
The first step, forging base;
By 13MnNiMo5-4 Heating Steel Ingots to 1200 ~ 1250 DEG C, be forged into external diameter and be not less than 2000mm, internal diameter is not less than 1500mm, and length is not less than the cylinder forgings of 2500mm;
Described 13MnNiMo5-4 steel ingot is for form by vacuum metling, vacuum pouring.
Second step, heat treatment after forging;
Forging is put into stove and be heated to 600 ~ 700 DEG C of insulations 4 ~ 5 hours; Then with the programming rate of≤100 DEG C/h, forging is heated to 900 ~ 960 DEG C and carries out austenitizing insulation; The time of austenitizing insulation is every 100mm wall thickness insulation 1 ~ 1.5 hour.
Afterwards by forging air cooling to≤250 DEG C, then forging is entered stove and is heated to 640 ~ 680 DEG C and carries out high tempering;
3rd step, property heat treatment;
Forging is heated to 600 ~ 700 DEG C of insulations 4 ~ 5 hours; Be heated to hardening heat 880 ~ 940 DEG C again, come out of the stove after carrying out quenching and preserving heat; The time of quenching and preserving heat is every 100mm wall thickness insulation 1 ~ 1.5 hour.
Afterwards forging is quenched by air blast compressed air cooling, until the surface temperature of forging be cooled to≤150 DEG C; Again forging is entered stove and be heated to temperature 630 ~ 670 DEG C, take out after carrying out tempering insulation; The time of tempering insulation is every 100mm wall thickness insulation 2 ~ 3 hours.
The technique effect that the present invention can reach is:
The present invention adopts the solid forging of vacuum metling steel ingot to form, then impose and carry out dry quenching Technology for Heating Processing, compared with the boiler-steam dome cylinder forgings obtained welds cylindrical shell with the roll of steel plate of routine, mechanical property is better than similar steel plate and rolls product, without obvious anisotropy, and lacked the weld seam of a longitudinal direction, the margin of safety of whole equipment can be improved.
Below in conjunction with detailed description of the invention, the present invention is further detailed explanation:
Detailed description of the invention
The manufacture method of boiler-steam dome 13MnNiMo5-4 cylinder forgings of the present invention, be not less than 2000mm for the manufacture of external diameter, internal diameter is not less than 1500mm, and length is not less than the boiler-steam dome 13MnNiMo5-4 cylinder forgings of 2500mm; Comprise the following steps:
The first step, forging base;
By 13MnNiMo5-4 Heating Steel Ingots to 1200 ~ 1250 DEG C of vacuum metling, vacuum pouring, by solid forging, be forged into external diameter and be not less than 2000mm, internal diameter is not less than 1500mm, and length is not less than the cylinder forgings of 2500mm;
Second step, heat treatment after forging;
Forging is put into stove and be heated to 600 ~ 700 DEG C of insulations 4 ~ 5 hours; Then with the programming rate of≤100 DEG C/h, forging is heated to 900 ~ 960 DEG C and carries out austenitizing insulation; The time of austenitizing insulation is every 100mm wall thickness insulation 1 ~ 1.5 hour;
Afterwards by forging air cooling to≤250 DEG C, then forging is entered stove and is heated to 640 ~ 680 DEG C and carries out high tempering; The object of high tempering operation eliminates the internal stress of blank, makes it hardness and be no more than HB180, so that carry out being machined to required size;
3rd step, property heat treatment;
Forging is heated to 600 ~ 700 DEG C of insulations 4 ~ 5 hours; Be heated to hardening heat 880 ~ 940 DEG C again, come out of the stove after carrying out quenching and preserving heat; The time of quenching and preserving heat is every 100mm wall thickness insulation 1 ~ 1.5 hour;
Afterwards forging is quenched by air blast compressed air cooling, until the surface temperature of forging be cooled to≤150 DEG C; Again forging is entered stove and be heated to temperature 630 ~ 670 DEG C, take out after carrying out tempering insulation; The time of tempering insulation is every 100mm wall thickness insulation 2 ~ 3 hours.
After above-mentioned heat treatment, the performance parameter of 13MnNiMo5-4 cylinder forgings is as shown in table 1:
Table 1
Maximum norm mimicry in table 1 refers to that sample is tested after the Simulated post-weld heat treatment of 580 DEG C of insulations air cooling after 18 hours;
Minimum modulus mimicry refers to that sample is tested after the Simulated post-weld heat treatment of 580 DEG C of insulations air cooling after 6 hours.
Contrast with the performance indications of 13MnNiMo5-4 steel plate, the performance of 13MnNiMo5-4 drum forging is more excellent, and does not have obvious anisotropy.
Claims (5)
1. a boiler-steam dome manufacture method for 13MnNiMo5-4 cylinder forgings, is characterized in that, be not less than 2000mm for the manufacture of external diameter, internal diameter is not less than 1500mm, and length is not less than the boiler-steam dome 13MnNiMo5-4 cylinder forgings of 2500mm; Comprise the following steps:
The first step, forging base;
By 13MnNiMo5-4 Heating Steel Ingots to 1200 ~ 1250 DEG C, be forged into external diameter and be not less than 2000mm, internal diameter is not less than 1500mm, and length is not less than the cylinder forgings of 2500mm;
Second step, heat treatment after forging;
Cylinder forgings is put into stove and be heated to 600 ~ 700 DEG C of insulations 4 ~ 5 hours; Then with the programming rate of≤100 DEG C/h, cylinder forgings is heated to 900 ~ 960 DEG C and carries out austenitizing insulation;
Afterwards by cylinder forgings air cooling to≤250 DEG C, then cylinder forgings is entered stove and is heated to 640 ~ 680 DEG C and carries out high tempering;
3rd step, property heat treatment;
Cylinder forgings is heated to 600 ~ 700 DEG C of insulations 4 ~ 5 hours; Be heated to hardening heat 880 ~ 940 DEG C again, come out of the stove after carrying out quenching and preserving heat;
Afterwards cylinder forgings is quenched by air blast compressed air cooling, until the surface temperature of cylinder forgings be cooled to≤150 DEG C; Again cylinder forgings is entered stove and be heated to temperature 630 ~ 670 DEG C, take out after carrying out tempering insulation.
2. the manufacture method of boiler-steam dome 13MnNiMo5-4 cylinder forgings according to claim 1, is characterized in that, the 13MnNiMo5-4 steel ingot of the described first step is for form by vacuum metling, vacuum pouring.
3. the manufacture method of boiler-steam dome 13MnNiMo5-4 cylinder forgings according to claim 1, is characterized in that, in described second step, the time of austenitizing insulation is every 100mm wall thickness insulation 1 ~ 1.5 hour.
4. the manufacture method of boiler-steam dome 13MnNiMo5-4 cylinder forgings according to claim 1, is characterized in that, in described 3rd step, the time of quenching and preserving heat is every 100mm wall thickness insulation 1 ~ 1.5 hour.
5. the manufacture method of 13MnNiMo5-4 cylinder forgings of the boiler-steam dome according to claim 1 or 4, is characterized in that, in described 3rd step, the time of tempering insulation is every 100mm wall thickness insulation 2 ~ 3 hours.
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| CN201210470099.2A CN103817277B (en) | 2012-11-19 | 2012-11-19 | The boiler-steam dome manufacture method of 13MnNiMo5-4 cylinder forgings |
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| CN103817277B true CN103817277B (en) | 2015-08-19 |
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| CN105714062A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Production method of high strength extra-thick boiler steam drum steel plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5487795A (en) * | 1993-07-02 | 1996-01-30 | Dong Won Metal Ind. Co., Ltd. | Method for heat treating an impact beam of automotive vehicle door and a system of the same |
| CN101403032A (en) * | 2008-11-12 | 2009-04-08 | 中国科学院金属研究所 | Thermal treatment process for quick cutting steel composite roll |
| CN101638716A (en) * | 2009-08-18 | 2010-02-03 | 杭州宝鼎铸锻有限公司 | Special process for freely forging ASTMA514 (GradeQ) steel ingot into platy forged piece |
| CN101654734A (en) * | 2008-08-20 | 2010-02-24 | 鞍钢重型机械有限责任公司 | Method for manufacturing alloy nodular cast iron roll of universal mill |
| CN101906523A (en) * | 2009-06-02 | 2010-12-08 | 上海重型机器厂有限公司 | Heat treatment process of nuclear power reactor pressure vessel reactor core cylinder forgings |
| CN102560024A (en) * | 2010-12-10 | 2012-07-11 | 上海重型机器厂有限公司 | Heat treatment method of martensite stainless steel forge piece for nuclear power reactor internals pressure spring |
-
2012
- 2012-11-19 CN CN201210470099.2A patent/CN103817277B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5487795A (en) * | 1993-07-02 | 1996-01-30 | Dong Won Metal Ind. Co., Ltd. | Method for heat treating an impact beam of automotive vehicle door and a system of the same |
| CN101654734A (en) * | 2008-08-20 | 2010-02-24 | 鞍钢重型机械有限责任公司 | Method for manufacturing alloy nodular cast iron roll of universal mill |
| CN101403032A (en) * | 2008-11-12 | 2009-04-08 | 中国科学院金属研究所 | Thermal treatment process for quick cutting steel composite roll |
| CN101906523A (en) * | 2009-06-02 | 2010-12-08 | 上海重型机器厂有限公司 | Heat treatment process of nuclear power reactor pressure vessel reactor core cylinder forgings |
| CN101638716A (en) * | 2009-08-18 | 2010-02-03 | 杭州宝鼎铸锻有限公司 | Special process for freely forging ASTMA514 (GradeQ) steel ingot into platy forged piece |
| CN102560024A (en) * | 2010-12-10 | 2012-07-11 | 上海重型机器厂有限公司 | Heat treatment method of martensite stainless steel forge piece for nuclear power reactor internals pressure spring |
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Effective date of registration: 20161220 Address after: 200245 Jiangchuan Road, Shanghai, No. 207, building 1800, No. Patentee after: Shanghai Electric Heavy Forging Co. Ltd. Patentee after: Shanghai Heavy-Machine Factory Co., Ltd. Address before: 200245 Jiangchuan Road, Shanghai, No. 1800, No. Patentee before: Shanghai Heavy-Machine Factory Co., Ltd. |