CN103484636B - Production process of forged tee - Google Patents
Production process of forged tee Download PDFInfo
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- CN103484636B CN103484636B CN201310399303.0A CN201310399303A CN103484636B CN 103484636 B CN103484636 B CN 103484636B CN 201310399303 A CN201310399303 A CN 201310399303A CN 103484636 B CN103484636 B CN 103484636B
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- forging
- stove
- production process
- normalizing
- forged
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000005242 forging Methods 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000005496 tempering Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract 2
- 238000010606 normalization Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 235000019362 perlite Nutrition 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
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- Heat Treatment Of Steel (AREA)
- Forging (AREA)
Abstract
The invention provides a production process of a forged tee. The production process mainly comprises the steps of pouring and forging molten steel into forging stocks, thermally processing the forging stocks into workblanks, further forging the workblanks, rapidly cooling and normalizing the workblanks, and finally air cooling and tempering the workblanks, and preserving the temperature. Through the steps, the forged tee can be obtained. The yield strength Rel and the tensile strength Rm of the forged tee obtained through the production process are 50 to 70MPa higher than that of the technical requirement, and the mechanical property requirement can be met; the composition is P+B+F, the grain size is grade 5 to grade 6, and the technical requirements can be met. By adopting the rapid cooling and normalization, the mechanical property of the forged tee is proved in the test to be remarkably improved, both the grain size and the composition meet the requirement, and the production process is particularly suitable for producing the F22 forged tee.
Description
Technical field
The invention belongs to thermal treatment manufacturing technology field, be specifically related to a kind of production technique of forging threeway.
Background technology
The forging threeway of now producing, technical requirements is: yield strength Rel >=310MPa, tensile strength Rm >=515MPa, unit elongation A >=20%, relative reduction in area Z >=30%, normal temperature impacts Akv >=27J, metallographic structure is perlite (P) or bainite (B)+ferrite (F), grain fineness number >=4 grade.Normalizing is difficult to meet mechanical property requirements as requested, even if take air blast blast-cold, performance also cannot ensure; If modifier treatment can meet mechanical property requirements, but the requirement that metallographic structure is perlite (P)+ferrite (F) cannot be met.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of production technique of forging threeway.
The production technique of forging threeway of the present invention mainly comprises the steps:
Step (1) adopts electric arc furnace smelting molten steel, is poured in ingot mold, obtains steel ingot after vacuum outgas;
Steel ingot, through 1200-1250 DEG C of heat, is forged into forging stock with press by step (2) steel ingot;
Step (3) forging stock, after heat treatment after forging, is processed into blank;
Blank is heated to 700-750 DEG C with≤60 DEG C/h by step (4), and insulation 2-4 hour, is then heated to 940-960 DEG C with≤80 DEG C/h, and being incubated came out of the stove after 7-9 hour cools normalizing fast;
Step (5) cools normalizing fast, and air cooling 2-4 minute, the water-cooled 15-25 second of coming out of the stove, then air blast is chilled to less than 200 DEG C;
Blank after air-cooled end is heated to 600-650 DEG C with≤60 DEG C/h by step (6), is chilled to less than 300 DEG C and comes out of the stove, obtain described forging threeway after tempering insulation 14-18h with≤30 DEG C/h stove.
The beneficial effect of production technique of the present invention:
1, yield strength Rel and tensile strength Rm all exceeds technical requirements 50-70MPa, can meet its mechanical property requirements;
2, be organized as P+B+F, grain fineness number 5-6 level, meets technical requirements.
Test proves, step of the present invention (5) adopts fast cooling normalizing can significantly improve the mechanical property of forging threeway, and grain fineness number and organizing all meets the requirements, and is particularly suited for producing F22 and forges threeway.
Embodiment
Embodiment 1 cools normalizing process fast
Step (1) adopts electric arc furnace smelting molten steel, is poured in ingot mold, obtains steel ingot after vacuum outgas;
Steel ingot, through 1200 DEG C of heat, is forged into forging stock with press by step (2) steel ingot;
Step (3) forging stock, after heat treatment after forging, is processed into blank;
Blank is heated to 700 DEG C with≤60 DEG C/h by step (4), is incubated 4 hours, is then heated to 960 DEG C with≤80 DEG C/h, and being incubated came out of the stove after 7 hours cools normalizing fast;
Step (5) cools normalizing fast, the air cooling 2 minutes of coming out of the stove, water-cooled 25 seconds, and then air blast is chilled to less than 200 DEG C;
Blank after air-cooled end is heated to 600 DEG C with≤60 DEG C/h by step (6), is chilled to less than 300 DEG C and comes out of the stove, obtain described forging threeway after tempering insulation 18h with≤30 DEG C/h stove.
Embodiment 2 cools normalizing process fast
Step (1) adopts electric arc furnace smelting molten steel, is poured in ingot mold, obtains steel ingot after vacuum outgas;
Steel ingot, through 1250 DEG C of heat, is forged into forging stock with press by step (2) steel ingot;
Step (3) forging stock, after heat treatment after forging, is processed into blank;
Blank is heated to 750 DEG C with≤60 DEG C/h by step (4), is incubated 2 hours, is then heated to 940 DEG C with≤80 DEG C/h, and being incubated came out of the stove after 9 hours cools normalizing fast;
Step (5) cools normalizing fast, the air cooling 4 minutes of coming out of the stove, water-cooled 15 seconds, and then air blast is chilled to less than 200 DEG C;
Blank after air-cooled end is heated to 650 DEG C with≤60 DEG C/h by step (6), is chilled to less than 300 DEG C and comes out of the stove, obtain described forging threeway after tempering insulation 14h with≤30 DEG C/h stove.
The common normalizing process of embodiment 3
Gained blank is risen to 700-750 DEG C of insulation 2-4 hour with≤60 DEG C/h by step (1);
Step (2) then rises to 940-960 DEG C of insulation 7-9 hour with≤80 DEG C/h;
Step (3) common normalizing, air blast of coming out of the stove is chilled to less than 200 DEG C;
Step (4) is chilled to less than 300 DEG C with≤30 DEG C/h stove after the blank after air-cooled end is heated to 600-650 DEG C of tempering insulation 14-18h with≤60 DEG C/h and comes out of the stove
the performance comparison of various processes:
The forging threeway performance that common normalizing process (embodiment 3) obtains is as follows:
The forging threeway performance that quick cooling normalizing process (embodiment 1) obtains is as follows:
Contrast above-mentioned two techniques, fast cooling normalizing can significantly improve its mechanical property, and grain fineness number and organizing all meets the requirements.Visible, cooling normalizing can meet performance and organizational requirements fast.
Claims (1)
1. forge a production technique for threeway, it is characterized in that, mainly comprise the steps:
Step (1) adopts electric arc furnace smelting molten steel, is poured in ingot mold, obtains steel ingot after vacuum outgas;
Steel ingot, through 1200-1250 DEG C of heat, is forged into forging stock with press by step (2) steel ingot;
Step (3) forging stock, after heat treatment after forging, is processed into blank;
Blank is heated to 700-750 DEG C with≤60 DEG C/h by step (4), and insulation 2-4 hour, is then heated to 940-960 DEG C with≤80 DEG C/h, and being incubated came out of the stove after 7-9 hour cools normalizing fast;
Step (5) cools normalizing fast, and air cooling 2-4 minute, the water-cooled 15-25 second of coming out of the stove, then air blast is chilled to less than 200 DEG C;
Blank after air-cooled end is heated to 600-650 DEG C with≤60 DEG C/h by step (6), is chilled to less than 300 DEG C and comes out of the stove, obtain described forging threeway after tempering insulation 14-18h with≤30 DEG C/h stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310399303.0A CN103484636B (en) | 2013-09-05 | 2013-09-05 | Production process of forged tee |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310399303.0A CN103484636B (en) | 2013-09-05 | 2013-09-05 | Production process of forged tee |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103484636A CN103484636A (en) | 2014-01-01 |
| CN103484636B true CN103484636B (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310399303.0A Active CN103484636B (en) | 2013-09-05 | 2013-09-05 | Production process of forged tee |
Country Status (1)
| Country | Link |
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| CN (1) | CN103484636B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105252230B (en) * | 2015-12-01 | 2017-05-24 | 河北宏润核装备科技股份有限公司 | Machining process for inclined tee |
| CN109423544A (en) * | 2017-08-28 | 2019-03-05 | 南京雄豹精密机械有限公司 | The control method of cooling stage in a kind of linear guide isothermal normalizing |
| CN107557540B (en) * | 2017-10-30 | 2018-11-06 | 山东伊莱特重工股份有限公司 | A kind of cold normalizing method of control of A105 forging |
| CN112045123A (en) * | 2020-08-26 | 2020-12-08 | 刘海龙 | Preparation process of 45-degree forged inclined tee joint |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732792A (en) * | 2012-07-02 | 2012-10-17 | 武汉钢铁(集团)公司 | Steel with thickness no lower than 100mm used in vessel in hydrogen environment, and production method thereof |
| CN102899447A (en) * | 2012-09-21 | 2013-01-30 | 江苏金石铸锻有限公司 | EAF+VOD smelting method of A182F22 (12Cr2Mo1) |
| CN102953008A (en) * | 2011-08-25 | 2013-03-06 | 南车戚墅堰机车车辆工艺研究所有限公司 | Alloy forged steel and its heat treatment method and use |
-
2013
- 2013-09-05 CN CN201310399303.0A patent/CN103484636B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953008A (en) * | 2011-08-25 | 2013-03-06 | 南车戚墅堰机车车辆工艺研究所有限公司 | Alloy forged steel and its heat treatment method and use |
| CN102732792A (en) * | 2012-07-02 | 2012-10-17 | 武汉钢铁(集团)公司 | Steel with thickness no lower than 100mm used in vessel in hydrogen environment, and production method thereof |
| CN102899447A (en) * | 2012-09-21 | 2013-01-30 | 江苏金石铸锻有限公司 | EAF+VOD smelting method of A182F22 (12Cr2Mo1) |
Non-Patent Citations (2)
| Title |
|---|
| 厚壁12Cr1MoVG钢管的热处理工艺优化;郭元蓉等;《钢管》;20081031;第37卷(第5期);第16页右栏第3段，第19页左栏第1-2段 * |
| 邱冬华等.12Cr2Mo1钢环锻件内部缺陷分析.《金属加工(热加工)》.2011,(第21期),第47-49页. * |
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| CN103484636A (en) | 2014-01-01 |
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Denomination of invention: Production process of forged tee Effective date of registration: 20190227 Granted publication date: 20150422 Pledgee: Yucheng Branch of Agricultural Bank of China Ltd. Pledgor: TONGYU HEAVY INDUSTRY Co.,Ltd. Registration number: 2019990000162 |
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Date of cancellation: 20210304 Granted publication date: 20150422 Pledgee: Yucheng Branch of Agricultural Bank of China Ltd. Pledgor: TONGYU HEAVY INDUSTRY Co.,Ltd. Registration number: 2019990000162 |
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Denomination of invention: Production technology of forging tee Effective date of registration: 20210304 Granted publication date: 20150422 Pledgee: Yucheng Branch of Agricultural Bank of China Ltd. Pledgor: TONGYU HEAVY INDUSTRY Co.,Ltd. Registration number: Y2021990000216 |
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Date of cancellation: 20230320 Granted publication date: 20150422 Pledgee: Yucheng Branch of Agricultural Bank of China Ltd. Pledgor: TONGYU HEAVY INDUSTRY Co.,Ltd. Registration number: Y2021990000216 |
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Denomination of invention: A Production Process for Forged Tees Effective date of registration: 20230323 Granted publication date: 20150422 Pledgee: Yucheng Branch of Agricultural Bank of China Ltd. Pledgor: TONGYU HEAVY INDUSTRY Co.,Ltd. Registration number: Y2023980035948 |
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