AHSS先进高强度钢在中级轿车及SUV平台上的应用资料下载.pdf

1、385 kg Sedan:300 kg Baseline:NA market representative Mid-size vehicle Scope:BIW+Bumpers+door in white Objective:achieve a 20%weight reduction at very low cost difference thanks to advanced high strength steels SUV:522 kg SUV:420 kg Roof Crush 40%Frontal 25%Frontal Side MDB Side Pole Rear 4 ArcelorM

2、ittal products used in this project ArcelorMittal currently available grades Essentially AHSS grades Dual Phase family Complex Phase family Usibor1500 Laser welded blanks（especially Usibor1500/Ductibor500）MartINsite family up to MartINsite 1700 And also DP490 Exposed ArcelorMittal emerging grades po

3、rtfolio New hot-stamping grades Usibor2000,Ductibor1000 High formability grades Fortiform 980 and 1180（980HF,1180HF）MartINsite 2000 Tensile strength values 2 sets of solutions:one with current grades,one with emerging grades 5 NA Mid-size Sedan Benchmarking Benchmarked vehicles represent 60%of 2013

4、US Mid-size sales（5 of top 6 sellers）Source:Fusion Accord Malibu Camry Altima 6 NA Mid-size Sedan Benchmark&Solutions 7 NA Mid-size sedans BIW weight without CMS*vs Curb Weight Aluminum intensive BIW Vehicle curb weight（kg）BiW weight（kg）（note:no secondary mass savings were considered for the solutio

5、n vehicles）The proposed BIW solutions are very close to aluminum intensive BIW.S-in motion Mid-size Sedan baseline S-in motion Mid-size solutions Source:*CMS=Crash Management System（bumper beam and crash boxes）NA Mid-size Sedan Benchmark&Baseline Honda Accord SOP 2012 Nissan Altima SOP 2012 S-in mot

6、ion Mid-size Sedan baseline BIW material breakdown 35%AHSS+PHS Ford Fusion SOP 2013 Source:Baseline is in line with current NA Mid-size Sedan BIWs（35%AHSS+PHS）.Benchmarked material breakdown values are based on A2Mac1 material analysis 8 Tensile strength values 33%AHSS+PHS 31%AHSS+PHS 39%AHSS+PHS NA

7、 Mid-size SUV Benchmark&Solutions The proposed BIW solution weight is close to aluminum intensive SUV BIW.Explorer（4x2）2011 Grand Cherokee（4x4）2014 Traverse（4x4）2011 Highlander（4x4）2013 Pilot Pathfinder（4x4）2014 Source:NA Mid-size SUV BIWs 9 BiW weight（kg）Footprint（m2）PHS intensive luxury SUV Alumin

8、um intensive luxury SUV SUV baseline S-in motion Mid-size SUV solution Baseline SUV Representation:BIW+CMS*Mid-size SUV Baseline The S-in motion Baseline considers the increase in AHSS use between 2010 and 2015 and therefore represents current state of the art（33%AHSS+PHS+MS）.SOA 2015:33%AHSS+PHS+MS

9、 Ford Explorer SOP 2010 Jeep Grand Cherokee SOP 2010 10 16%AHSS+PHS+MS 8%AHSS+PHS+MS*CMS=Crash Management System（bumper beam and crash boxes）Mid-size Sedan/SUV Platform S-in motion Mid-size SUV Guidelines Modular approach in regard to the Mid-size Sedan Type of body:unibody Worst case for transmissi

10、on choice in one model:oNo prop-shaft present for a more severe intrusions scenario o4x4 transmission mass considered 25%of underbody mass of the SUV Solution is carried over from the Sedan Solution underbody 86/241 parts Transparent white:specific SUV parts Green:100%Sedan C/O Blue:Scaled Sedan par

11、ts（wheelbase+90mm）S-in motion Mid-size SUV S-in motion Mid-size Sedan The S-in motion Mid-size SUV model was built as a platform extension of the S-in motion Mid-size Sedan.11 Bandwidth study on 200 kg heavier vehicle A typical Midsize bandwidth is about 200 kg comparing lightest I4 FWD to PHEV or A

12、WD version Mass was added on engine and rear structure of S-in motion Mid-size Sedan FEM to simulate heaviest vehicle Baseline Solution+200 kg Solution+200kg Performances on major crash load cases are restored with local reinforcements（+3.7 kg）.No reinforcement required to meet performance target Us

13、ibor1500 patch blanks up-gauged or extended New side sill reinforcements Cross-member patch blank extended Shotgun thickness increased No reinforcement required to meet performance target Roof crush+0.2 kg SORB+3.5 kg REAR SIDE Maximum plastic strain of 9%in fuel tank（target 450MPa-7.8 kg MartINsite1700 11.7 kg DP980 9.6 kg DP590-15.4 kg DP490 exposed 8.5 kg HSS 37.9 kg Mild Steel-71.1 kg DP780 and HR780FC 5.5 kg Tensile strength values 19 Sedan Emerging Steel Gra