CN107557554A - A kind of normalizing process of automobile shafts class bar roller bottom type annealing furnace - Google Patents
A kind of normalizing process of automobile shafts class bar roller bottom type annealing furnace Download PDFInfo
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- CN107557554A CN107557554A CN201710844903.1A CN201710844903A CN107557554A CN 107557554 A CN107557554 A CN 107557554A CN 201710844903 A CN201710844903 A CN 201710844903A CN 107557554 A CN107557554 A CN 107557554A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention is a kind of normalizing process of automobile shafts class bar roller bottom type annealing furnace, including：13 bringing-up section temperature of continuous oven are：1 ± 10 DEG C of 500 DEG C of bringing-up section, 2 ± 10 DEG C of 600 DEG C of bringing-up sections, 3 ± 10 DEG C of 700 DEG C of bringing-up sections, 4 ± 10 DEG C of 730 DEG C of bringing-up sections, 5 ± 5 DEG C of 760 DEG C of bringing-up sections, 6 ± 5 DEG C of 780 DEG C of bringing-up sections, 7 ± 5 DEG C of 780 DEG C of bringing-up sections, 8 ± 5 DEG C of 790 DEG C of bringing-up sections, 9 ± 5 DEG C of 790 DEG C of bringing-up sections, 10 ± 5 DEG C of 790 DEG C of bringing-up sections, 11 ± 5 DEG C of 790 DEG C of bringing-up sections, 12 ± 5 DEG C of 790 DEG C of bringing-up sections, 13 ± 5 DEG C of 790 DEG C of bringing-up sections；Bar is tiled in continuous oven using individual layer, and space, normalizing process roller speed 11 13m/h, the 35HZ of blower fan frequency 25 are left between Zhi Yuzhi.Present invention can ensure that the even tissue for steel of coming out of the stove and decarburization are qualified, the internal stress of bar can be removed, reduces the hardness of bar, improves plasticity.
Description
Technical field
The present invention relates to a kind of normalizing process of field of metallurgy, specifically a kind of automobile shafts class is moved back with bar roller-bottom type
The normalizing process of stove.
Background technology
Normalizing, it is air cooling after heating（Cooled down in air）, suitable for mild steel.Roller bottom type annealing furnace uses chain drive,
Furnace rolls road is driven to rotate, furnace roller equidistant intervals, maximum heating temperature is 950 DEG C in stove.Temperature fluctuation is controlled in ± 50 Hes
± 10, normalizing process roller speed 12m/h, roller speed is very fast, and blower fan frequency is high, and temperature control difficulty is big, can not ensure steel of coming out of the stove
Even tissue and decarburization are qualified.
The content of the invention
The technical problems to be solved by the invention are the shortcomings that presence for above prior art, to propose a kind of automobile shafts
The normalizing process of class bar roller bottom type annealing furnace, it is ensured that the even tissue for steel of coming out of the stove and decarburization are qualified, can go
Except the internal stress of bar, the hardness of bar is reduced, improves plasticity.
The present invention solve above technical problem technical scheme be：
A kind of automobile shafts class normalizing process of bar roller bottom type annealing furnace, comprises the following steps：
(i) roller bottom type annealing furnace uses continuous oven, continuous oven is from first to last divided continuous oven controlled respectively into 13 bringing-up sections, temperature
It is made as：1st ± 10 DEG C of 500 DEG C of bringing-up section, the 2nd ± 10 DEG C of 600 DEG C of bringing-up section, the 3rd ± 10 DEG C of 700 DEG C of bringing-up section, the 4th bringing-up section
730 DEG C ± 10 DEG C, the 5th ± 5 DEG C of 760 DEG C of bringing-up section, the 6th ± 5 DEG C of 780 DEG C of bringing-up section, the 7th ± 5 DEG C of 780 DEG C of bringing-up section, the 8th adds
790 DEG C ± 5 DEG C of hot arc, the 9th ± 5 DEG C of 790 DEG C of bringing-up section, the 10th ± 5 DEG C of 790 DEG C of bringing-up section, the 11st ± 5 DEG C of 790 DEG C of bringing-up section,
12nd ± 5 DEG C of 790 DEG C of bringing-up section, the 13rd ± 5 DEG C of 790 DEG C of bringing-up section；
(ii) ensure that residual oxygen is less than 10ppm in stove using waste material, in residual oxidation stability in below 10ppm fashion materials, bar is in continuous oven
It is interior to be tiled using individual layer, leave space, normalizing process roller speed 11-13m/h, blower fan frequency 25-35HZ between Zhi Yuzhi.
The beneficial effects of the invention are as follows：The normalizing process of the automobile shafts class bar roller bottom type annealing furnace of the present invention can be protected
Card come out of the stove bar even tissue and decarburization it is qualified, pearlite and ferrite is evenly distributed, decarburization normalizing process is almost not
Increase decarburization, decarburization 0.17MM before 30 millimeters of pole material normalizings, decarburization 0.175MM after normalizing, can remove bar after testing
Internal stress, the hardness of bar is reduced, improve plasticity, hardness is reduced to 220-210HRW by the 240-230HRW before normalizing.
Embodiment
Embodiment 1
The present embodiment is a kind of normalizing process of automobile shafts class bar roller bottom type annealing furnace, is comprised the following steps：
Roller bottom type annealing furnace uses continuous oven, continuous oven is from first to last divided continuous oven controlled respectively into 13 bringing-up sections, temperature
For：1st 500 DEG C of bringing-up section, the 2nd 600 DEG C of bringing-up section, the 3rd 700 DEG C of bringing-up section, the 4th 730 DEG C of bringing-up section, the 5th bringing-up section 760
DEG C, the 6th 780 DEG C of bringing-up section, the 7th 780 DEG C of bringing-up section, the 8th 790 DEG C of bringing-up section, the 9th 790 DEG C of bringing-up section, the 10th bringing-up section 790
DEG C, the 11st 790 DEG C of bringing-up section, the 12nd 790 DEG C of bringing-up section, the 13rd 790 DEG C of bringing-up section；
Ensure that residual oxygen is less than 10ppm in stove using waste material, in residual oxidation stability in below 10ppm fashion materials, bar is in continuous oven
Tiled using individual layer, 5-10mm spaces, normalizing process roller speed 11m/h, blower fan frequency 25HZ are left between Zhi Yuzhi.
The normalizing process of the automobile shafts class bar roller bottom type annealing furnace of the present embodiment can ensure to come out of the stove the tissue of bar
Uniformly and decarburization is qualified, can remove the internal stress of bar, reduces the hardness of bar, improves plasticity.
Embodiment 2
The present embodiment is a kind of normalizing process of automobile shafts class bar roller bottom type annealing furnace, is comprised the following steps：
Roller bottom type annealing furnace uses continuous oven, continuous oven is from first to last divided continuous oven controlled respectively into 13 bringing-up sections, temperature
For：1st 490 DEG C of bringing-up section, the 2nd 590 DEG C of bringing-up section, the 3rd 690 DEG C of bringing-up section, the 4th 720 DEG C of bringing-up section, the 5th bringing-up section 755
DEG C, the 6th 775 DEG C of bringing-up section, the 7th 775 DEG C of bringing-up section, the 8th 785 DEG C of bringing-up section, the 9th 785 DEG C of bringing-up section, the 10th bringing-up section 785
DEG C, the 11st 785 DEG C of bringing-up section, the 12nd 785 DEG C of bringing-up section, the 13rd 785 DEG C of bringing-up section；
Ensure that residual oxygen is less than 10ppm in stove using waste material, in residual oxidation stability in below 10ppm fashion materials, bar is in continuous oven
Tiled using individual layer, 5-10mm spaces, normalizing process roller speed 12m/h, blower fan frequency 30HZ are left between Zhi Yuzhi.
The normalizing process of the automobile shafts class bar roller bottom type annealing furnace of the present embodiment can ensure to come out of the stove the tissue of bar
Uniformly and decarburization is qualified, can remove the internal stress of bar, reduces the hardness of bar, improves plasticity.
Embodiment 3
The present embodiment is a kind of normalizing process of automobile shafts class bar roller bottom type annealing furnace, is comprised the following steps：
Roller bottom type annealing furnace uses continuous oven, continuous oven is from first to last divided continuous oven controlled respectively into 13 bringing-up sections, temperature
For：1st 510 DEG C of bringing-up section, the 2nd 610 DEG C of bringing-up section, the 3rd 710 DEG C of bringing-up section, the 4th 740 DEG C of bringing-up section, the 5th bringing-up section 765
DEG C, the 6th 785 DEG C of bringing-up section, the 7th 785 DEG C of bringing-up section, the 8th 795 DEG C of bringing-up section, the 9th 795 DEG C of bringing-up section, the 10th bringing-up section 795
DEG C, the 11st 795 DEG C of bringing-up section, the 12nd 795 DEG C of bringing-up section, the 13rd 795 DEG C of bringing-up section；
Ensure that residual oxygen is less than 10ppm in stove using waste material, in residual oxidation stability in below 10ppm fashion materials, bar is in continuous oven
Tiled using individual layer, 5-10mm spaces, normalizing process roller speed 13m/h, blower fan frequency 35HZ are left between Zhi Yuzhi.
The normalizing process of the automobile shafts class bar roller bottom type annealing furnace of the present embodiment can ensure to come out of the stove the tissue of bar
Uniformly and decarburization is qualified, can remove the internal stress of bar, reduces the hardness of bar, improves plasticity.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domains of application claims.
Claims (5)
- A kind of 1. normalizing process of automobile shafts class bar roller bottom type annealing furnace, it is characterised in that：Comprise the following steps：(i) roller bottom type annealing furnace uses continuous oven, continuous oven is from first to last divided continuous oven controlled respectively into 13 bringing-up sections, temperature It is made as：1st ± 10 DEG C of 500 DEG C of bringing-up section, the 2nd ± 10 DEG C of 600 DEG C of bringing-up section, the 3rd ± 10 DEG C of 700 DEG C of bringing-up section, the 4th bringing-up section 730 DEG C ± 10 DEG C, the 5th ± 5 DEG C of 760 DEG C of bringing-up section, the 6th ± 5 DEG C of 780 DEG C of bringing-up section, the 7th ± 5 DEG C of 780 DEG C of bringing-up section, the 8th adds 790 DEG C ± 5 DEG C of hot arc, the 9th ± 5 DEG C of 790 DEG C of bringing-up section, the 10th ± 5 DEG C of 790 DEG C of bringing-up section, the 11st ± 5 DEG C of 790 DEG C of bringing-up section, 12nd ± 5 DEG C of 790 DEG C of bringing-up section, the 13rd ± 5 DEG C of 790 DEG C of bringing-up section；(ii) ensure that residual oxygen is less than 10ppm in stove using waste material, in residual oxidation stability in below 10ppm fashion materials, bar is in continuous oven It is interior to be tiled using individual layer, leave space, normalizing process roller speed 11-13m/h, blower fan frequency 25-35HZ between Zhi Yuzhi.
- 2. the normalizing process of automobile shafts class bar roller bottom type annealing furnace as claimed in claim 1, it is characterised in that：Zhi Yuzhi Between leave 5-10mm spaces.
- 3. the normalizing process of automobile shafts class bar roller bottom type annealing furnace as claimed in claim 1, it is characterised in that：Positive firer Skill roller speed 11m/h, blower fan frequency 25HZ.
- 4. the normalizing process of automobile shafts class bar roller bottom type annealing furnace as claimed in claim 1, it is characterised in that：Positive firer Skill roller speed 12m/h, blower fan frequency 30HZ.
- 5. the normalizing process of automobile shafts class bar roller bottom type annealing furnace as claimed in claim 1, it is characterised in that：Positive firer Skill roller speed 13m/h, blower fan frequency 35HZ.
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| CN201710844903.1A CN107557554A (en) | 2017-09-19 | 2017-09-19 | A kind of normalizing process of automobile shafts class bar roller bottom type annealing furnace |
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| CN201710844903.1A CN107557554A (en) | 2017-09-19 | 2017-09-19 | A kind of normalizing process of automobile shafts class bar roller bottom type annealing furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950152A (en) * | 2018-07-24 | 2018-12-07 | 南京钢铁股份有限公司 | A kind of normalizing process of automobile bar roller bottom type annealing furnace |
| CN111560499A (en) * | 2020-05-18 | 2020-08-21 | 南京钢铁股份有限公司 | Annealing process of steel for high-strength-grade mining chain |
| CN113930606A (en) * | 2021-10-13 | 2022-01-14 | 南京钢铁股份有限公司 | Normalizing process of steel for automobile transmission shaft parts |
| CN115418451A (en) * | 2022-08-30 | 2022-12-02 | 南京钢铁股份有限公司 | Process method for improving normalizing bending of round steel for automobile |
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| CN202017038U (en) * | 2011-04-02 | 2011-10-26 | 金川集团有限公司 | Copper and copper alloy continuous roller hearth type annealing furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950152A (en) * | 2018-07-24 | 2018-12-07 | 南京钢铁股份有限公司 | A kind of normalizing process of automobile bar roller bottom type annealing furnace |
| CN111560499A (en) * | 2020-05-18 | 2020-08-21 | 南京钢铁股份有限公司 | Annealing process of steel for high-strength-grade mining chain |
| CN111560499B (en) * | 2020-05-18 | 2022-03-22 | 南京钢铁股份有限公司 | Annealing process of steel for high-strength-grade mining chain |
| CN113930606A (en) * | 2021-10-13 | 2022-01-14 | 南京钢铁股份有限公司 | Normalizing process of steel for automobile transmission shaft parts |
| CN115418451A (en) * | 2022-08-30 | 2022-12-02 | 南京钢铁股份有限公司 | Process method for improving normalizing bending of round steel for automobile |
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