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超高强度热轧结构钢，高强调质热处理钢板
宝钢于2008年在国内率先开始超高强度热轧结 构钢板卷产品开发，已形成屈服强度800MPa- 1300MPa级别的BS系列超高强钢产品。该系列超 高强结构钢采用宝钢先进的炼钢、轧制以及热处理 工艺，产品不仅具有超高的强度，而且具有良好的 低温韧性、可焊接性和冷成形性能。该系列产品性 能稳定均匀，板形、表面等质量良好。
该系列产品可广泛应用于起重机、泵车等工程机械 及车辆结构等制造行业。
Ultra-high strength steel (UHSS) with 800MPa yield strength for construction machinery was first developed in China by Baosteel in 2008. Now 800MPa-1300MPa of BS series of UHSS products have been available. These products are manufactured with advanced steel making, rolling, and heat treatment processes. They have stable excellent properties such as ultra high strength, good toughness at low temperature, good welding performance and cold forma bi lity.This series of products have stable performances, good plate shape and excellent surface quality.
These products have been widely used in vehicles and engineering machinery such as cranes, pump trucks.
制造工艺及交贷状态
Manufacturing process and delivery condition
生产工艺流程：BS系列超高强钢釆用氧气转炉冶 炼镇静钢，经过炉外精炼后进行连续浇铸，连铸 坯送热轧厂再加热并采用控轧控冷工艺轧制成卷， 精整矫直切板，根据性能要求选择合适的热处理工 艺，以热处理状态交货。（见图1）
交货状态：BS系列超高强钢采用热处理状态交 化
贝O
Manufacturing process: The BS series UHSS steel is killed in oxygen converter. After secondary refining and continuous casting, the slabs are reheated, rolled in TMCP rolling process, leveling and cutting process. Then, they will be heat -treated.
Delivery condition: The BS series UHSS steel is delivered in heat-treatment conditio
牌号及可供规格范围
Product range of dimensions
牌号意义
Designation
供货规格
Products available
超出规格 The available gauges of BS series UHSS steels are as shown in the table 1. Contact us if the required size is out of range.
表1宝钢热轧超高强钢供货规格范围
lab. 1 Gauge of Baosteel Hot-rolled UHSS
|
产品大类 Category |
Grade |
成品厚度 Thickness, mm |
成品宽度 Width, mm |
成品长度 Length, mm |
交货状态 Delivery condition |
|
DC® DQ type |
BS800QC BS900QC BS960QC |
3-4 |
850-1400 |
2000-12000 |
DQ+T (在线淬火+回火) (Direct quenching and tempering) |
|
>4-8 |
850-1600 |
||||
|
RQ型 RQtype |
BS900D(E) BS960D(E) BS1100D(E) BS1300D |
3-4 |
850-1650 |
2000-12800 |
Q+T (离线淬火+回火) (Reheating, quenching and tempering) |
|
>4-12 |
850-1850 |
供货技术条件
Technical supply conditions
表2供货技术条件-DQ型产品化学成分(wt%)
Tab. 2 Chemical composition of DQ type products
|
Ibfa E3 Grade |
C |
Si |
Mn |
P |
S |
Alt |
|
BS800QC |
"12 |
弓 0.50 |
《2.00 |
《0.020 |
《0.010 |
20.015 |
|
BS900QC |
<0.12 |
<0.50 |
《2.00 |
《0.020 |
《0.010 |
20.015 |
|
BS960QC |
<0.12 |
<0.50 |
<2.00 |
<0.020 |
<0.010 |
>0.015 |
注：根据强度要求，可以加入Nb、V、Tis Mo. B等合金元素。
Note: Nb, \f, Ti, Mo, B may be added according to requirement
表3供货技术条件-RQ型产品化学成分(wt%)
Tab. 3 Chemical composition of RQ type products
|
llifa ES 遇― Grade |
C |
Si |
Mn |
Cr |
Mo |
P |
S |
Alt |
B |
|
BS900 D(E) |
《0.20 |
弓 0.50 |
<2.00 |
"0 |
"0 |
《0.015 |
8005 |
20.015 |
8005 |
|
BS960D(E) |
弓 0.20 |
《0.50 |
《2.00 |
s.o |
《1.0 |
S0.015 |
《0.005 |
20.015 |
W0.005 |
|
BS1100D(E) |
<0.22 |
<0.50 |
<2.00 |
<1.0 |
<1.0 |
<0.015 |
<0.005 |
>0.015 |
<0.005 |
|
BS1300D |
《0.30 |
《0.50 |
《2.00 |
"0 |
"0 |
《0.015 |
《0.005 |
20.015 |
8005 |
注：根据强度要求，可以加入Nb、V、Ti等合金元素。
Note: Nb, V, Ti may be added according to requirement
表4供货技术条件-DQ型产品力学性能
Tab. 4 Mechanical properties of DQ type products
|
Ulfa El Grade |
厚度 Thickness mm |
拉伸试验⑴ Tensile test |
弯曲试验⑵ Bending test |
冲击试验⑶ Impact test |
||||
|
方向 Direction |
屈服强度 Yield strength ReH, MPa |
抗拉强度 Tensile strength Rm, MPa |
延伸率 Elongation A,% |
弯曲内径 Bending diameter d |
温度 Temperature |
冲击值⑷ Charp impact, J |
||
|
BS800QC |
3-8 |
L |
2800 |
2850 |
210 |
d=4a, 90° |
-40°C |
227 |
|
BS900QC |
3-8 |
L |
N900 |
2950 |
210 |
d=5a, 90° |
-40°C |
227 |
|
BS960QC |
3-8 |
L |
>960 |
>980 |
>8 |
d=6a, 90° |
-40°C |
>27 |
1) 拉伸试样方向T =横向，L =纵向。试样采用短比例标距，l0 = 5.657s. O
2) 弯曲试验取横向试样,d =弯心直径，3 =钢板公称厚度。
3) 冲击试验采用夏比V型缺口试样，取样方向平行于轧制方向(纵向试样)，表中冲击值为全试样(10x10x55, mm)冲击值， 采用1/2试样或3/4试样时，该值等比例减小；板厚<6mm时不做冲击性能检测。
4) 冲击功值为一组三个试样试验结果的平均值，允许其中一个试样的试验结果小于规定值，但不得小于规定值的70%0
1) Tensile test sample T=transverse direction, L=longitudinal direction. A short gauge length sample (l0 = 5.65^^) is used in tensile test.
2) Transverse sample is used in bending test. d=bending diameter, a = thickness of steel sheet.
3) Charp V-notch longitudinal sample is used in impact test. The values in Tab. 4 are required from full sizes (10x10*55, mm).
The values are reduced proportionally when 1/2 samples or 3/4 samples are used. Impact test will not processed with sheet thickness <6mm.
4) Impact value is the average value of 3 test results. One result lower than criterion but not lower than 70% of criterion is permitted.
表5供货技术条件-RQ型产品力学性能
Tab. 5 Mechanical properties of RQ type products
|
Ibb E3 Grade |
厚度 Thickness mm |
拉伸试验⑴ Tensile test |
弯曲试验⑵ Bending test |
冲击试验⑶ Impact test |
||||
|
方向 Direction |
屈服强度 Yield strength ReH, MPa |
抗拉强度 Tensile strength Rm, MPa |
延伸率 Elongation A,% |
弯曲内径 Bending diameter d |
温度 Temperature |
冲击值⑷ Charp impact, J |
||
|
BS900D |
3-12 |
L |
Z900 |
N950 |
212 |
d=5a, 90° |
-20°C |
>27 |
|
BS900E |
-40°C |
>27 |
||||||
|
BS960D |
3-12 |
|
2960 |
2980 |
210 |
d=6a, 90° |
-20°C |
N27 |
|
BS960E |
L |
-40°C |
227 |
|||||
|
BS1100D |
3-12 |
L |
^1100 |
N1250 |
28 |
d=6a, 90° |
-20°C |
N27 |
|
BS1100E |
-40°C |
227 |
||||||
|
BS1300D |
3-12 |
L |
>1300 |
>1350 |
>8 |
d=8a, 90° |
-20°C |
>27 |
1) 拉伸试样方向T =横向，L =纵向。试样采用短比例标距，1。= 5.65/嬴。
2) 弯曲试验取横向试样,《=弯心直径，a =钢板公称厚度。
3) 冲击试验采用夏比V型缺口试样，取样方向平行于轧制方向(纵向试样)，表中冲击值为全试样(10x10x55, mm )冲击值， 采用1/2试样或3/4试样时，该值等比例减小；板厚<6mm时不做冲击性能检测。
4) 冲击功值为一组三个试样试验结果的平均值，允许其中一个试样的试验结果小于规定值，但不得小于规定值的70%。
1) Tensile test sample T=transverse direction, L=longitudinal direction. A short gauge length sample (l0 = 5.65^/^)) is used in tensile test.
2) Transverse sample is used in bending test. d=bending diameter, a = thickness of steel sheet
3) Charp V-notch longitudinal sample is used in impact test. The values in Tab. 5 are required from full sizes (10*10*55, mm).
The values are reduced proportionally when 1/2 samples or 3/4 samples are used. Impact test will not processed with sheet thickness <6mm.
4) Impact value is the average value of 3 test results. One result lower than criterion but not lower than 70% of criterion is permitted.
用户使用技术
Application technology
焊接工艺
Welding technology
1预热和层间温度
Preheating and interpass temperature
|
|
|
|
表6 BS系列超高强钢产品典型碳当量、冷裂纹敏感性指数及预热、层间温度推荐
lab. 6 Typical Ceq, Pcm and cold cracking sensitivity index of BS series UHSS and recommended preheating and interpass temperatures
|
Ilril EH 牌亍 Grade |
Ceq (IIW) |
Pcm |
最低预热温度 Minimum preheat temperature |
最高层间温度 Maximum interpass temperature |
||
|
< 5mm 5~10mm |
10~12mm |
12~14mm |
||||
|
BS800QC |
0.39 |
0.17 |
室温 Room temperature ( 20P ) |
|
||
|
BS900QC |
0.48 |
0.21 |
|
|
|
|
|
BS960QC |
0.48 |
0.21 |
|
|
|
|
|
BS900D |
0.50 |
0.28 |
室温（20*0 ） |
|
75t： |
|
|
BS900E |
0.50 |
0.28 |
Room temperature |
150t |
||
|
BS960D |
0.50 |
0.28 |
|
|
|
|
|
BS960E |
0.50 |
0.28 |
|
|
|
|
|
BS1100D |
0.56 |
0.30 |
室温(20P ) Room temperature |
|
|
|
|
BS1100E |
0.56 |
0.30 |
75P |
|
||
|
BS1300D |
0.64 |
0.37 |
|
|
|
|
宝钢BS系列高强结构钢系列产品推荐焊接热输 入见表7所示。
The recommended heat input of Baosteel BS series steels is shown in Table 7
表7宝钢BS系列产品在最低预热温度下GMAW热输入推荐
lab. 7 recommended GMAW heat input at minimum preheating temperature
|
强度级别 Grade |
热输入(Q) kJ/cm Heat input |
||
|
t ■ 6mm |
6 v ti 10mm |
10 < 14mm |
|
|
BS800 |
M8 |
M 12 |
M15 |
|
BS900 |
|
|
M12 |
|
BS960 |
£8 |
M 10 |
|
|
BS1100 |
|
||
|
BS1300 |
|
|
3-12 |
3焊材选择与推荐
Matched welding consumables
|
|
表8宝钢BS产品焊材匹配推荐
Tab. 8 Recommended matched welding consumables for Baosteel BS steels
|
Rp0.2 MPa |
500 |
600 |
700 |
800 |
900 |
|
EN标准 EN standard |
EN 12534 G62X EN440 G50X |
EN12534 G62X |
EN 12534 G69X |
EN 12534 G79X |
EN12534 G89X |
|
AWS标准 AWS standard |
AWSA5.28 ER80S-X ER90S-X |
AWSA5.28 ER100S-X |
AWSA5.28 ER110S-X |
AWS A5.28 ER120S-X |
AWSA5.28 ER140S-X |
|
宝钢产品 Baosteel products |
BH600-II |
BH700-II |
BH800-II |
BH900-II |
BH1000-II |
|
BS800 |
• |
• |
• |
• |
|
|
BS900 |
• |
. |
|||
|
BS960 |
|||||
|
BS1100 |
• |
||||
|
BS1300 |
•等强匹配(Equal strength matching) | 低强匹配(lower strength matching)
表9宝钢BS960QC匹配BH900-II接头疲劳性能
Tab. 9 The fatigue performance of GMAW welded joints BS960/BH900-II
|
接头形式 Joint type |
2也CT循环下的疲劳极限(MPa ) Fatigue strength at 2x106 cycles |
BS7608标准要求 Requirement in Standard BS7608 |
|
|
基于疲劳极限试验 based on fatigue limit test |
基于拟合的均值S-N曲线 Based on S-N curve |
||
|
BS960 对接接头 Butt joint |
140 |
128.8 |
118 ( Class E ) |
|
BS960 横向十字接头 Cruciform joint |
135 |
106.9 |
95.2 ( Class F ) |
切割
Cutting
BS系列超高强钢推荐采用热切割方式，如激光切 割或等离子切割，切割表面平滑，热影响区小，对 钢板的力学性能影响可忽略不计。
BS超高强钢不推荐机械方式进行切割下料（包括 剪切、冲裁、圆盘剪切等）。
Thermal cutting is recommended to BS series UHSS, such as Laser cutting and plasma cutting, inorder to obtain smooth surface and narrowest heat affected zone. The reduction of mechanical properties can be ignored.
Mechanical cutting of BS UHSS is highly not recommended, such as shearing, blanking, disc shearing.etc.
冷弯加工
Cold forming
BS系列超高强钢具有良好的塑性，适合冷弯加 工。折弯时，弯曲半径应大于技术条件中的规定 值。除了折弯半径和折弯角，钢板表面质量、切边 质量、折弯方向都可能影响折弯质量。
超高强钢的回弹较大，成型时应通过适当的过弯曲 来保证获得所需的折弯角度。
With high strength and good formability, BS series steel is suitable for cold forming. It is suggested the actual bending diameter should be no less than the diameter specified in the delivery condition. Also to note, the rebounding of high strength steels is greater than conventional steel and might result in the deviation of the shape. Suitable over-bending could be applied to get the required angle.
矫形
Leveling
BS系列超高强钢如需矫形时，建议采用冷矫形方 式。如特殊情况下需要采用热矫形时，BS800、 BS900和BS960级别超高强钢的热矫形温度建议不 超过500P, BS1100和BS1300级别超高强钢不建 议进行热矫形。
Cold leveling is recommended when deviation occurs after the forming of BS series steel. If heat leveling must be used in exceptional situation, the heat leveling temperature of BS800, BS900,BS960 is suggested not to be greater than 550°C in order to avoid changes in properties. Heat leveling of BS1100, BS1300 is not recommonded.
