CHUNG HUNG STEEL CORPORATION. Introduction of. Fine Blanking & Formability Steel HUNG LI STEEL CORPORATION

Transcription

1 CHUNG HUNG STEEL CORPORATION Introduction of Fine Blanking & Formability Steel HUNG LI STEEL CORPORATION

2 Productive Facilities Continuous pickling line Oiling and inspection of CPL Batch Annealing Furnace for Spheroidizing Anneal Rolling Mill for gauge control Reversing type Cold Rolling mill Tension Leveler

3 1. Products Introduction Fine Blanking & Formability Steel (FBFS) has wide range of chemical compositions from low carbon steel to middle/high carbon steel and various low-alloyed steels. Beyond the precise conditions of die in following working, when the material produced as steel sheet, the process must be capable to control accurate thickness and good formability, then introduced to versatile fine-blanking applications, such as automobile transmission components, safety critical automotive components, locking systems, interior seat adjusters, braking systems, automated machinery parts and also electronic component categories, door locks etc.. The materials can be fine-blanked with smooth cut edges, so debarring can be eliminated. Manufacturers can obtain products with value-added and cost down. Motorcycle starter component S45C Recliner component SCM415 Although the materials usually dropped in hot rolled gauge range, however they need more function advantages than cold rolled steel. The main quality characteristics includes following: (1) Precise thickness control: can meet the requirement of the die set-up in Fine Blanking operation. The key factor is the achievement within several hundredth mm gauge difference either in rolling or transverse direction in the sheet, no matter what sheet gauge is. (2) Formability: steel grades with high carbon equivalent are difficult in forming process, but the work piece need the workability to be a high quality product, and then the steel matrix with good spheroidized carbide can contribute the feature. (3) Hardenability: because of the carbon equivalent of steel, the material has sufficient hardenability if heat treatment after mechanical working provided. 1

4 2. Manufacturing process of FBFS products The Manufacturing Flow Chart of Fine Blanking & Formability Steel Slab casting Hot Rolling Pickling Products Inspecting, Oiling and Sampling Gauge control Spheroidizing Anneal 3. Quality Characteristics (1) Comparison of typical Mechanical properties Symbol of Class Yield Strength (MPa) Tensile Strength (MPa) Elongation (%) Hardness (HRb) EN MnCr5 JIS G4053 SCM435 JIS G4051 S55C HR ~95 FBFS ~82 HR ~95 FBFS ~85 HR ~104 FBFS ~85 HR: Hot Rolled Coil FBFS: Fine Blanking & Formability Steel 2

5 (2) Optical Metallography (Spheroidized ratio 90%) a. 16MnCr5 10μ m 10μ m Hot - Rolled 1000x Carbides Spheroidized 1000x b. JIS G4053 SCM435 10μ m 10μ m c. JIS G4051 S55C Hot - Rolled 1000x Carbides Spheroidized 1000x 10μ m 10μ m Hot - Rolled 1000x Carbides Spheroidized 1000x 3

6 (3) Bending Test a. Bending Test of Hot-Rolled JIS G4051 S55C Steel Sheet(r = 0 t) Fig. 1a broken Bend Surface Fig.1b broken Bend profile b. Bending Test of Spheroidized JIS G4051 S55C Steel Sheet. (r = 0 t) Fig. 2a Bend Surface without Crack Fig. 2b Bend profile without crack 4

7 (4) Gauge Accuracy a. Gauge chart in rolling direction (a)16mncr5 Thickness: 5.03 mm Width: 1,060mm 3.95mm (b)scm435 Thickness: 5.02 mm Width:950mm (c)s55c Thickness: 2.91 mm Width: 940mm b. Profile in width direction (a)16mncr5 Thickness: 5.03 mm Width: 1,060mm (b)scm435 Thickness: 5.02 mm Width:950mm (c)s55c Thickness: 2.91 mm Width: 940mm 5

8 4. Available Specification for FBFS Products Item JIS Steel grade SAE Thickness (mm) Yield Strength (MPa) Mechanical properties Chemical composition (%) Tensile strength (MPa) Elongation Hardness (%) (HRB) 1 SPHD 1.8~ ~ max. C Mn Si P S Cr Mo Ni 0.50 max max max max S15C 1.8~ ~ S20C 1.8~ ~ S35C 1.8~ ~ S45C 1.8~ ~ S50C 1.8~ ~ S55C 1.8~ ~ SCM ~ ~ SCM ~ ~ SAE ~ ~ SAE ~ ~ SAE ~ ~ max. max max. max max. max max. max max. max max. max max. max max max. max max max. max max. max max. max Item JIS Steel grade EN10132 Thickness (mm) Yield Strength (MPa) Mechanical properties Chemical composition (%) Tensile strength (MPa) Elongation Hardness (%) (HRB) 13 16MnCr5 1.8~ ~82 C Mn Si P S Cr Mo Ni max max. max Other steel grades are available, please contact sales department

9 5. Product Size Ranges 1. C.E Feasible range Manufacturing range <C.E.< 0.80 Carbon Equivalent (C.E.): C.E.(%)=C + Mo/4 + Cr/5 + Mn/6 + V/14 + Si/24 + Ni/40 7

10 6. Product Packing (1) Packing for export Indication Label Identification label Inner edge protector Outer Edge protector Lateral plate Packing strip and seal Inside iron sheet Outside iron sheet (2)Packing for domestic Indication label Identification label Inner edge protector Outer edge protector Packing strip and seal Antirust wrapping paper 8

11 7. Product Labeling (1) Domestic Sample (2) Export Sample 9

12 8. Ordering Information Because the applications are critical, we hope all the features of FBFS meet customer s requirement, please carefully confirm the following items when ordering: Item Specification Scope 1 Product Fine Blanking & Formability Steel 2 Standard and Steel grades JIS G4053 SCM Dimensions(Thickness Width) 5.00 mm 930 mm 4 Order amount 100 tones 5 Roll edge finish Cut Edge 6 Oiling Medium 7 Carbide spheroidized ratio 90% above 8 Packing weight 6 ~ 12 metric tonnes 9 Inside diameter of coil 610mm 10 Usage Purpose Seatbelt Locking clip and Strap 11 Delivery date By request and marine date 12 Label and packing requirement According to CHS standard 13 Dimension Tolerance Thickness of Order ± 0.05mm 14 Special requirement. If any Please contact sales department 10

13 9. Quality Assurance Hung Li Steel Corporation (HLS) has implemented an efficient quality assurance system who has achieved ISO 9001:2008 Quality System in December (Approved by Bureau of Standards, Metrology & Inspection, M.O.E.A., R.O.C) 11

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15 10. National Standard Steel Grade comparison Table JAPAN CHINA USA EUROPE JIS GB AISI/SAE EN G EN S10C C10/C10E / C10R S15C C15/C15E / C15R Machine Structure Steels S20C C22/C22E/C22R S35C C35/C35E/C35R S45C C45/C45E/C45R S50C C50/ C50E/C50R S55C C55/C55E/C55R S58C C60/C60E/C60R G EN Chrome Steels SCr415 15Cr MnCr5 SCr420 20Cr 5120 Chrome Molybdenum Steels G4053 EN SCM415 15CrMo - - SCM430 30CrMo SCM435 35CrMo/35CrMoV CrMo4/34CrMoS4 - Q/BQB EN Low Alloy Steels Nickel Chrome Molybdenum Steels QStE380TM QStE420TM QStE460TM S420MC S460MC G EN SNCM220 20CrNiMo NiCrMo2-2 13

16 Chung Hung Steel Corporation 317, Yu Liao Road, Chiao Tou, Kaohsiung, 82544, Taiwan,R.O.C TEL: ; FAX: China Steel Global Corporation 10F, No.88 Cheng gong 2 nd Road,Qian zhen,kaohsiung, 80661, Taiwan, R.O.C TEL: EXT or FAX: Hung Li Steel Corporation 24, Yen Hai 3 rd Road, Hsiao Kang, Kaohsiung, 81264, Taiwan, R.O.C TEL: EXT 8221;8401 FAX: HLP0@hlsteel.com.tw July. 2017, 11 th Edition