CN103805862B - Axle shell steel and preparation method thereof - Google Patents
Axle shell steel and preparation method thereof Download PDFInfo
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- CN103805862B CN103805862B CN201410056108.2A CN201410056108A CN103805862B CN 103805862 B CN103805862 B CN 103805862B CN 201410056108 A CN201410056108 A CN 201410056108A CN 103805862 B CN103805862 B CN 103805862B
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Abstract
The invention discloses a kind of axle shell steel and preparation method thereof, have good stamping formabilily and welding property, stamping rear resilience is little, form trait is good.A kind of axle shell steel, its chemical composition and weight percent are: C:0.08% ~ 0.12%, Si:0.85% ~ 1.0%, Mn:0.62% ~ 1.19%, P :≤0.020%, S :≤0.012%, Al:0.025% ~ 0.07%, Ti:0.041% ~ 0.06%, Nb:0.05% ~ 0.062%, Mo:0.12 ~ 2.1%, Ce:0.48 ~ 0.62%, W:4.8 ~ 5.2%, W:4.8 ~ 5.2%, Cr:1.68% ~ 0.32%, remaining is Fe and inevitable impurity.A kind of axle shell steel Preparation Method, comprises the following steps: batching also melting; Carry out vacuum-treat; Carry out continuous casting and become blank; Strand is heated; Carry out roughing; Finish rolling; Tempering and Quenching is carried out after shaping.
Description
Technical field
The present invention relates to a kind of automobile brake sheet, be specifically related to a kind of axle shell steel and preparation method thereof
.
Background technology
Vehicle bridge is whole is one of primary member of running car system, its support frame and the later each assembly weight of vehicle frame, each parts simultaneously in its protection transmission system.Along with the development of axle housing manufacturing technology and the energy-conservation needs of automobile loss of weight, particularly for the driving axle housing of cargo truck, used the hot continuous-milling steel plate of 12 ~ 16mm thickness to make punching weldering axle housing, instead of complex manufacturing technology, production efficiency is on the low side, the casting bridge shell body that heavy, cost is higher.
Current domestic high-strength vehicle punching weldering axle housing hot-rolled steel sheet generally adopts general steel plate as 16MnL, 09SiVL, 08Ti, T52 etc.These steel exist deficiency be through stamping, be welded-shaping after easy to crack, have a strong impact on quality and the work-ing life of product.
Summary of the invention
One of the object of the invention is to provide a kind of axle shell steel, has good stamping formabilily and welding property, and stamping rear resilience is little, form trait is good.
Two of the object of the invention is to provide a kind of above-mentioned axle shell steel Preparation Method, utilizes hot rolling to be shaped, can play material property, make to reach aspect of performance requirement, and saves cost.
To achieve these goals, the present invention is by the following technical solutions:
A kind of axle shell steel, its chemical composition and weight percent are: C:0.08% ~ 0.12%, Si:0.85% ~ 1.0%, Mn:0.62% ~ 1.19%, P :≤0.020%, S :≤0.012%, Al:0.025% ~ 0.07%, Ti:0.041% ~ 0.06%, Nb:0.05% ~ 0.062%, Mo:0.12 ~ 2.1%, Ce:0.48 ~ 0.62%, W:4.8 ~ 5.2%, W:4.8 ~ 5.2%, Cr:1.68% ~ 0.32%, remaining is Fe and inevitable impurity.
Above-mentioned axle shell steel, its chemical composition and weight percent are: C:0.96%, Si:0.89%, Mn:0.75%, P:0.015%, S:0.003%, Al:0.029%, Ti:0.046%, Nb:0.059%, Mo:0.18%, Ce:0.52%, W:4.96%, Cr:1.72%, remaining is Fe and inevitable impurity.
A kind of axle shell steel Preparation Method, comprises the following steps:
1) carry out batching and melting according to the chemical composition of above-mentioned axle shell steel and weight percent, molten steel temperature is 1650 DEG C ~ 1690 DEG C;
2) vacuum-treat is carried out: the treatment time, maintenance vacuum tightness was 680Pa ~ 725Pa at 13 ~ 16 minutes;
3) carry out continuous casting and become blank, liquid steel temperature within the scope of 1550 DEG C ~ 1650 DEG C, casting speed 1.2-1.4 m/min, frequency of billet withdrawal 90-120 beat/min;
4) to strand heating, Heating temperature, at 1240 DEG C ~ 1250 DEG C, is incubated 150 ~ 180 minutes;
5) carry out roughing, roughing start rolling temperature is 1120 DEG C ~ 1150 DEG C, and finishing temperature is 1020 DEG C ~ 1035 DEG C;
6) finish rolling, finish rolling start rolling temperature is 920 ~ 945 DEG C, and finish rolling finishing temperature is 810 DEG C ~ 830 DEG C, between finishing stand, carry out water-cooled, coolant water temperature 20 DEG C ~ 35 DEG C, and speed of cooling controls at 25 ~ 45 DEG C/sec;
7) carry out Tempering and Quenching after being shaped: 875 DEG C ~ 930 DEG C insulation quenchings after 25 ~ 35 minutes, quenching temperature is 950 ~ 980 DEG C, and insulation 2 ~ 6h, adopts oil quenching; Then 685 DEG C ~ 700 DEG C tempering after 30 ~ 90 minutes, air cooling, second heat are rectified, and straightening temperature is 500 ~ 600 DEG C.
Beneficial effect of the present invention:
Steel of the present invention is low due to carbon, and adds Nb, Ce, Ti etc., makes steel mechanical property obtain obvious improvement, and has excellent stamping formabilily and welding property, even if cold-forming, and the dimensional stabilizing after it is shaping.Be applicable to cold punching technology, be also applicable to heat pressure forming process, stamping resilience is little, shape-holding property good.Through carrying out bench testing to the axle case assy made by it, the detected result of its vertical curve fatigue lifetime, vertical curve rigidity, vertical curve static strength all complies with the national standard requirements.Steel tensile strength is higher than steel such as 16MnL, T52L, and supporting capacity greatly improves.
Embodiment
Be described in further details the present invention below by specific embodiment, following explanation is only exemplary, does not limit protection scope of the present invention.
Embodiment 1
Produce 16mm thickness axle housing steel plate.
A kind of axle shell steel, its chemical composition and weight percent are: C:0.096%, Si:0.89%, Mn:0.75%, P:0.015%, S:0.003%, Al:0.029%, Ti:0.046%, Nb:0.059%, Mo:0.18%, Ce:0.52%, W:4.96%, Cr:1.72%, remaining is Fe and inevitable impurity.
A kind of axle shell steel Preparation Method, is characterized in that comprising the following steps:
1) carry out batching and melting according to the chemical composition of above-mentioned axle shell steel and weight percent, molten steel temperature is 1685 DEG C ~ 1690 DEG C;
2) vacuum-treat is carried out: the treatment time, maintenance vacuum tightness was 725Pa at 16 minutes;
3) carry out continuous casting and become blank, liquid steel temperature within the scope of 1600 DEG C ~ 1650 DEG C, casting speed 1.4 ms/min, frequency of billet withdrawal 120 beats/min;
4) to strand heating, Heating temperature, at 1240 DEG C ~ 1250 DEG C, is incubated 180 minutes;
5) carry out roughing, roughing start rolling temperature is 1140 DEG C ~ 1150 DEG C, and finishing temperature is 1030 DEG C ~ 1035 DEG C;
6) finish rolling, finish rolling start rolling temperature is 935 ~ 945 DEG C, and finish rolling finishing temperature is 825 DEG C ~ 830 DEG C, between finishing stand, carry out water-cooled, coolant water temperature 30 DEG C ~ 35 DEG C, and speed of cooling controls at 40 ~ 45 DEG C/sec;
7) carry out Tempering and Quenching after being shaped: 915 DEG C ~ 930 DEG C insulation quenchings after 30 ~ 35 minutes, quenching temperature is 975 ~ 980 DEG C, and insulation 4 ~ 6h, adopts oil quenching; Then 692 DEG C ~ 700 DEG C tempering after 65 ~ 90 minutes, air cooling, second heat are rectified, and straightening temperature is 580 ~ 600 DEG C.
Embodiment 2
Produce 14mm thickness axle housing steel plate
A kind of axle shell steel, chemical composition and weight percent are: C:0.12%, Si:0.85%, Mn:1.19%, P:0.017%, S:0.005%, Al:0.07%, Ti:0.06%, Nb:0.05%, Mo:0.12%, Ce:0.62%, W:4.8%, Cr:1.68%, remaining is Fe and inevitable impurity.
Axle shell steel Preparation Method described in a kind of right, comprises the following steps:
1) carry out batching and melting according to the chemical composition of above-mentioned axle shell steel and weight percent, molten steel temperature is 1660 DEG C ~ 1685 DEG C;
2) vacuum-treat is carried out: the treatment time, maintenance vacuum tightness was 700Pa at 15 minutes;
3) carry out continuous casting and become blank, liquid steel temperature within the scope of 1550 DEG C ~ 1650 DEG C, casting speed 1.3 ms/min, frequency of billet withdrawal 105 beats/min;
4) to strand heating, Heating temperature, at 1240 DEG C ~ 1250 DEG C, is incubated 165 minutes;
5) carry out roughing, roughing start rolling temperature is 1130 DEG C ~ 1140 DEG C, and finishing temperature is 1020 DEG C ~ 1025 DEG C;
6) finish rolling, finish rolling start rolling temperature is 930 ~ 935 DEG C, and finish rolling finishing temperature is 820 DEG C ~ 825 DEG C, between finishing stand, carry out water-cooled, coolant water temperature 25 DEG C ~ 30 DEG C, and speed of cooling controls at 30 ~ 45 DEG C/sec;
7) carry out Tempering and Quenching after being shaped: 900 DEG C ~ 915 DEG C insulation quenchings after 28 ~ 30 minutes, quenching temperature is 965 ~ 970 DEG C, and insulation 3 ~ 3.5h, adopts oil quenching; Then 685 DEG C ~ 690 DEG C tempering after 50 ~ 65 minutes, air cooling, second heat are rectified, and straightening temperature is 550 ~ 580 DEG C.
Embodiment 3
Produce 12mm thickness axle housing steel plate
A kind of axle shell steel, chemical composition and weight percent are: C:0.08%, Si:1.0%, Mn:0.62%, P:0.013%, S:0.012%, Al:0.055%, Ti:0.05%, Nb:0.062%, Mo:2.1%, Ce:0.48%, W:5.2%, Cr:0.32%, remaining is Fe and inevitable impurity.
A kind of described axle shell steel Preparation Method, comprises the following steps:
1) carry out batching and melting according to the chemical composition of above-mentioned axle shell steel and weight percent, molten steel temperature is 1650 DEG C ~ 1660 DEG C;
2) vacuum-treat is carried out: the treatment time, maintenance vacuum tightness was 680Pa at 13 minutes;
3) carry out continuous casting and become blank, liquid steel temperature within the scope of 1550 DEG C ~ 1650 DEG C, casting speed 1.2-1.4 m/min, frequency of billet withdrawal 90-120 beat/min;
4) to strand heating, Heating temperature, at 1240 DEG C ~ 1250 DEG C, is incubated 150 minutes;
5) carry out roughing, roughing start rolling temperature is 1120 DEG C ~ 1130 DEG C, and finishing temperature is 1025 DEG C ~ 1030 DEG C;
6) finish rolling, finish rolling start rolling temperature is 920 ~ 930 DEG C, and finish rolling finishing temperature is 810 DEG C ~ 820 DEG C, between finishing stand, carry out water-cooled, coolant water temperature 20 DEG C ~ 25 DEG C, and speed of cooling controls at 25 ~ 30 DEG C/sec;
7) carry out Tempering and Quenching after being shaped: 875 DEG C ~ 900 DEG C insulation quenchings after 25 ~ 28 minutes, quenching temperature is 950 ~ 965 DEG C, and insulation 2 ~ 3h, adopts oil quenching; Then 685 DEG C ~ 690 DEG C tempering after 30 ~ 50 minutes, air cooling, second heat are rectified, and straightening temperature is 500 ~ 550 DEG C.
Each embodiment performance test results above-mentioned is in table 1.
Mechanics properties testing the results list of each embodiment of table 1
Table 1 shows that axle shell steel of the present invention has higher intensity and elongation, and vertical and horizontal performance inconsistency is little, has good cold shaping performance.
Claims (2)
1. an axle shell steel Preparation Method, chemical composition and the weight percent of described axle shell steel are: C:0.08% ~ 0.12%, Si:0.85% ~ 1.0%, Mn:0.62% ~ 1.19%, P :≤0.020%, S :≤0.012%, Al:0.025% ~ 0.07%, Ti:0.041% ~ 0.06%, Nb:0.05% ~ 0.062%, Mo:0.12 ~ 2.1%, Ce:0.48 ~ 0.62%, W:4.8 ~ 5.2%, Cr:1.68% ~ 0.32%, remaining is Fe and inevitable impurity, it is characterized in that comprising the following steps:
1) carry out batching and melting according to the chemical composition of above-mentioned axle shell steel and weight percent, molten steel temperature is 1650 DEG C ~ 1690 DEG C;
2) vacuum-treat is carried out: the treatment time, maintenance vacuum tightness was 680Pa ~ 725Pa at 13 ~ 16 minutes;
3) carry out continuous casting and become blank, liquid steel temperature within the scope of 1550 DEG C ~ 1650 DEG C, casting speed 1.2-1.4 m/min, frequency of billet withdrawal 90-120 beat/min;
4) to strand heating, Heating temperature, at 1240 DEG C ~ 1250 DEG C, is incubated 150 ~ 180 minutes;
5) carry out roughing, roughing start rolling temperature is 1120 DEG C ~ 1150 DEG C, and finishing temperature is 1020 DEG C ~ 1035 DEG C;
6) finish rolling, finish rolling start rolling temperature is 920 ~ 945 DEG C, and finish rolling finishing temperature is 810 DEG C ~ 830 DEG C, between finishing stand, carry out water-cooled, coolant water temperature 20 DEG C ~ 35 DEG C, and speed of cooling controls at 25 ~ 45 DEG C/sec;
7) carry out Tempering and Quenching after being shaped: 875 DEG C ~ 930 DEG C insulation quenchings after 25 ~ 35 minutes, quenching temperature is 950 ~ 980 DEG C, and insulation 2 ~ 6h, adopts oil quenching; Then 685 DEG C ~ 700 DEG C tempering after 30 ~ 90 minutes, air cooling, second heat are rectified, and straightening temperature is 500 ~ 600 DEG C.
2. axle shell steel Preparation Method according to claim 1, is characterized in that: chemical composition and the weight percent of described axle shell steel are: C:0.096%, Si:0.89%, Mn:0.75%, P:0.015%, S:0.003%, Al:0.029%, Ti:0.046%, Nb:0.059%, Mo:0.18%, Ce:0.52%, W:4.96%, Cr:1.72%, remaining is Fe and inevitable impurity.
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| CN201410056108.2A CN103805862B (en) | 2014-02-19 | 2014-02-19 | Axle shell steel and preparation method thereof |
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| CN201410056108.2A CN103805862B (en) | 2014-02-19 | 2014-02-19 | Axle shell steel and preparation method thereof |
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| CN103805862B true CN103805862B (en) | 2016-02-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104480389B (en) * | 2015-01-05 | 2017-01-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot rolled band for automotive axle housing and manufacturing method thereof |
| CN113528779B (en) * | 2021-06-22 | 2023-01-31 | 首钢集团有限公司 | Method for controlling strength reduction of axle housing steel after hot forming and axle housing steel prepared by method |
Citations (5)
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| CN101289700A (en) * | 2008-06-17 | 2008-10-22 | 钢铁研究总院 | Method for preparing thermal and warm punching parts of high strength martensitic matrix |
| CN101565794A (en) * | 2008-04-22 | 2009-10-28 | 宝山钢铁股份有限公司 | High-strength hot rolling automotive frame steel plate and manufacturing method thereof |
| CN102383034A (en) * | 2011-11-07 | 2012-03-21 | 武汉钢铁(集团)公司 | Steel for 13-dwt vehicle axle housing and production method thereof |
| CN102864384A (en) * | 2012-08-31 | 2013-01-09 | 中国重汽集团济南动力有限公司 | High-strength automobile axle housing material and method for manufacturing axle housing |
| CN103498107A (en) * | 2013-10-22 | 2014-01-08 | 江苏盛伟模具材料有限公司 | High-boron high-chromium low-carbon high-temperature-resistant wear-resisting alloy steel and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009280870A (en) * | 2008-05-23 | 2009-12-03 | Sumitomo Metal Ind Ltd | Steel plate for axle housing |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565794A (en) * | 2008-04-22 | 2009-10-28 | 宝山钢铁股份有限公司 | High-strength hot rolling automotive frame steel plate and manufacturing method thereof |
| CN101289700A (en) * | 2008-06-17 | 2008-10-22 | 钢铁研究总院 | Method for preparing thermal and warm punching parts of high strength martensitic matrix |
| CN102383034A (en) * | 2011-11-07 | 2012-03-21 | 武汉钢铁(集团)公司 | Steel for 13-dwt vehicle axle housing and production method thereof |
| CN102864384A (en) * | 2012-08-31 | 2013-01-09 | 中国重汽集团济南动力有限公司 | High-strength automobile axle housing material and method for manufacturing axle housing |
| CN103498107A (en) * | 2013-10-22 | 2014-01-08 | 江苏盛伟模具材料有限公司 | High-boron high-chromium low-carbon high-temperature-resistant wear-resisting alloy steel and manufacturing method thereof |
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Inventor after: Wu Yuyin Inventor after: Wang Yijun Inventor after: Wang Zhen Inventor before: Wu Yuyin |
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