CN101709368A - 400-series stainless steel bar or wire heat treatment method - Google Patents
400-series stainless steel bar or wire heat treatment method Download PDFInfo
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- CN101709368A CN101709368A CN200910227927A CN200910227927A CN101709368A CN 101709368 A CN101709368 A CN 101709368A CN 200910227927 A CN200910227927 A CN 200910227927A CN 200910227927 A CN200910227927 A CN 200910227927A CN 101709368 A CN101709368 A CN 101709368A
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Abstract
The invention relates to a 400-series stainless steel bar or wire heat treatment method comprising the following steps in sequence: (1) cooling the hot-rolled stainless steel bar or wire which at the finishing rolling temperature of 900-1050 DEG C in air naturally or with wind to 600-800 DEG C; (2) loading the stainless steel bar or wire which at 600-800 DEG C in a heat treatment furnace, preserving the heat of the heat treatment furnace at 650-750 DEG C for 30-120min, taking the stainless steel bar or wire out of the heat treatment furnace, and cooling the stainless steel bar in air naturally or with wind or water to the room temperature of generally 80 DEG C or less. The annealing time which lasts for 40-50h in the prior 400-series stainless steel bar or wire heat treatment method is reduced to 1-2h in the 400-series stainless steel bar or wire heat treatment method of the invention, and the production efficiency is improved.
Description
Technical field
The present invention relates to the heat treating method of a kind of 400 series stainless steel bars or wire rod.
Background technology
In stainless steel bars wire production process, 400 series stainless steel bars or wire rod must be heat-treated, and reduce structural stress, finish structural transformation, thereby just can carry out processing such as follow-up aligning.General heat treating method is now: slow cooling heats up, is incubated, lowers the temperature and finish structural transformation to normal temperature.Its whole process reaches 40～50 hours.Because its treatment time is long, must increase equipment, place during production in enormous quantities, has a strong impact on production efficiency, energy consumption is also high.Therefore be necessary to develop a kind of quick thermal treatment process.
Summary of the invention
In order to overcome the above-mentioned deficiency of the heat treating method that has 400 series stainless steels rod line or wire rod now, the invention provides a kind of 400 series stainless steel bars of treatment time weak point or the heat treating method of wire rod.
Design of the present invention derives from the 2Cr13 time temperature transformation curve, and its principle is: utilize heat energy and energy of deformation after rolling, temperature drop carries out isothermal treatment for short time to certain temperature fast, thereby finishes structural transformation, reaches to eliminate stress the effect of reduction hardness.
After rolling end, carry out heat fast and collect, controlled temperature near the isothermal curve smallest point,
The heat treatment furnace of packing into carries out isothermal treatment for short time, treat that structural transformation is finished after, the air cooling of coming out of the stove.The tissue characteristic that changes after finishing is austenite and remaining martensite.
The heat treating method of these 400 series stainless steel bars or wire rod comprises following sequential steps:
(1) with finishing temperature is bar or wire rod after 900 ℃～1050 ℃ the hot rolling, naturally cooling or air-cooled to 600 ℃～800 ℃;
(2) 600 ℃～800 ℃ bar or wire rod are packed into heat treatment furnace, the heat treatment furnace holding temperature is 650 ℃～750 ℃, soaking time is 30 minutes～120 minutes, and the naturally cooling of coming out of the stove then in air, air-cooled or water cooling are to room temperature, and general cooling temperature is not higher than 80 ℃.
The heat treating method of these 400 series stainless steel bars or wire rod is when handling bar, and its steps characteristic is levied and is:
(1) with finishing temperature is bar after 900 ℃～1000 ℃ the hot rolling, naturally cooling or air-cooled to 650 ℃～800 ℃;
(2) 650 ℃～800 ℃ bar is packed into heat treatment furnace, the heat treatment furnace holding temperature is 680 ℃～750 ℃, and soaking time is 30 minutes～120 minutes, and come out of the stove then in air naturally cooling or air cooling are to room temperature, and general cooling temperature is not higher than 80 ℃.
The heat treating method of these 400 series stainless steel bars or wire rod is when handling wire rod, and its steps characteristic is levied and is:
(1) with finishing temperature is wire rod after 900 ℃～1050 ℃ the hot rolling, naturally cooling or air-cooled to 650 ℃～800 ℃;
(2) 650 ℃～800 ℃ wire rod is packed into heat treatment furnace, the heat treatment furnace holding temperature is 650 ℃～750 ℃, soaking time 30 minutes～120 minutes, the naturally cooling of coming out of the stove then in air, air-cooled or water cooling are to room temperature, and general cooling temperature is not higher than 80 ℃.
The heat treating method of these 400 series stainless steel bars or wire rod, handle 400 series stainless steel rod or wire rods of equivalent weight, annealing time was from 40-50 hour of the heat treating method of existing 400 series stainless steels rod wire rod, be reduced to 1-2 hour, improved production efficiency, simultaneously can energy efficient more than 60%.
Embodiment one
The enforcement time is on July 16th, 2009, steel grade 20C13, and specification Φ 80mm, 5 meters of length, 2 of quantity, 950 ℃ of finishing temperatures naturally cool to 680 ℃ of heat treatment furnaces of packing into, and 720 ℃ of holding temperatures are incubated after 1.5 hours the air cooling of directly coming out of the stove.Through check hardness is 185HB and 197HB, meets the performance requriements of GB/T1220.
Embodiment two
The enforcement time is on March 20th, 2008, steel grade 20C13, specification Φ 11mm, length 300mm, 6 of quantity, 1000 ℃ of finishing temperatures naturally cool to 750 ℃ of heat treatment furnaces of packing into, 720 ℃ of holding temperatures are incubated after 1,1.5,2 hour directly come out of the stove air cooling and water-cooled.Through check hardness (HB) is 184,177,187,187,167,184, meets the performance requriements of GB/T4356.
Claims (3)
1. the heat treating method of series stainless steel bar or wire rod, it comprises following sequential steps:
(1) with finishing temperature is bar or wire rod after 900 ℃～1050 ℃ the hot rolling, naturally cooling or air-cooled to 600 ℃～800 ℃;
(2) 600 ℃～800 ℃ bar or wire rod are packed into heat treatment furnace, the heat treatment furnace holding temperature is 650 ℃～750 ℃, soaking time is 30 minutes～120 minutes, and the naturally cooling of coming out of the stove then in air, air-cooled or water cooling are to room temperature, and general cooling temperature is not higher than 80 ℃.
2. the heat treating method of 400 series stainless steel bars according to claim 1 or wire rod is characterized in that steps characteristic when handling bar is levied and is:
(1) with finishing temperature is bar after 900 ℃～1000 ℃ the hot rolling, naturally cooling or air-cooled to 650 ℃～800 ℃;
(2) 650 ℃～800 ℃ bar is packed into heat treatment furnace, the heat treatment furnace holding temperature is 680 ℃～750 ℃, and soaking time is 30 minutes～120 minutes, and come out of the stove then in air naturally cooling or air cooling are to room temperature, and general cooling temperature is not higher than 80 ℃.
3. the heat treating method of 400 series stainless steel bars according to claim 1 or wire rod is characterized in that steps characteristic when handling wire rod is levied and is:
(1) with finishing temperature is wire rod after 900 ℃～1050 ℃ the hot rolling, naturally cooling or air-cooled to 650 ℃～800 ℃;
(2) 650 ℃～800 ℃ wire rod is packed into heat treatment furnace, the heat treatment furnace holding temperature is 650 ℃～750 ℃, soaking time 30 minutes～120 minutes, the naturally cooling of coming out of the stove then in air, air-cooled or water cooling are to room temperature, and general cooling temperature is not higher than 80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910227927A CN101709368A (en) | 2009-11-28 | 2009-11-28 | 400-series stainless steel bar or wire heat treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910227927A CN101709368A (en) | 2009-11-28 | 2009-11-28 | 400-series stainless steel bar or wire heat treatment method |
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| CN101709368A true CN101709368A (en) | 2010-05-19 |
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| CN200910227927A Pending CN101709368A (en) | 2009-11-28 | 2009-11-28 | 400-series stainless steel bar or wire heat treatment method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845546A (en) * | 2010-06-21 | 2010-09-29 | 哈尔滨工业大学 | Heat treatment method of 9Cr180Mo steel valve bush part |
| CN102294352A (en) * | 2011-08-29 | 2011-12-28 | 山西太钢不锈钢股份有限公司 | Method for rolling stainless-steel bar material with diameter of 120mm by utilizing rolling mill of 650mm |
| CN107737904A (en) * | 2017-10-20 | 2018-02-27 | 苏州市天星山精密模具有限公司 | A kind of casting technique for being used to prepare injection mold |
-
2009
- 2009-11-28 CN CN200910227927A patent/CN101709368A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845546A (en) * | 2010-06-21 | 2010-09-29 | 哈尔滨工业大学 | Heat treatment method of 9Cr180Mo steel valve bush part |
| CN102294352A (en) * | 2011-08-29 | 2011-12-28 | 山西太钢不锈钢股份有限公司 | Method for rolling stainless-steel bar material with diameter of 120mm by utilizing rolling mill of 650mm |
| CN102294352B (en) * | 2011-08-29 | 2013-05-22 | 山西太钢不锈钢股份有限公司 | Method for rolling stainless-steel bar material with diameter of 120mm by utilizing rolling mill of 650mm |
| CN107737904A (en) * | 2017-10-20 | 2018-02-27 | 苏州市天星山精密模具有限公司 | A kind of casting technique for being used to prepare injection mold |
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Application publication date: 20100519 |