超高强度热轧结构钢,调质热处理高强板

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。


多赢彩票注册 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

贝O


Manufacturing process: 多赢彩票注册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

RQRQtype

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

多赢彩票注册 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

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

多赢彩票注册 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

0.50

<2。00

"0

"0

0。015

8005

20。015

8005

BS960D(E)

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

多赢彩票注册 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多赢彩票注册 = 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。

多赢彩票注册 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.

多赢彩票注册 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

多赢彩票注册 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

多赢彩票注册  

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

2CT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 )


多赢彩票注册 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)。


多赢彩票注册 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.




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