Общий каталог Tungaloy 2020 - 2021 - страница 230

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T-CBN series for sintered metal

Application area BX470

Valve seat Valve seat

Ferrous Sintered metal(Plunge cutting)(Traverse cutting)
Priority on burr prevention
300120120and surface fi nish
100100BX480
BX470Priority on wear resistance

BX480 BX470 and versatility

BX330 150 BX470 50 50

SMF40X0 series material (JPMA standard)

0 0 0

55 60 65 300 300

Hardness of workpiece material (HRC)Hardness of workpiece material (Hv)Hardness of workpiece material (Hv)
Machining of sintered metal with hard particlesFeatures of BX470 and BX480
Features of

BX470 and BX480 Conventional grade BX470 / BX480 CBN content: 95 vol%

Hv = 4100 ~ 4300

The world highest CBN content as

Hard particleBinderCBN grain
a commercially available material.
Binder phase are selectively worn away by hard particles.By increasing CBN content, wear of binder layer is suppressed.
e Wear proceeds with falling-out of CBN grains,e Improved wear resistance

BX480 (Facing of gears) ■ BX470 / BX480 Tool failure after machining sintered metal ■ BX470 (Tool life criterion: Burr occurrence)

300 600 Vc = 250 m / min 250 200 400

150 Vc = 120 m / min

100ConventionalBX480200
PCBN grade
50After machiningAfter machining
150 pcs.300 pcs.
00
BX480BX470BX480Competitor ACompetitor B
Conventional grade
Cutting conditionsCutting conditionsCutting conditions
Workpiece material: Sintered metal (> HRA60)Workpiece material: Sintered metal (> HRA60), Nitriding,Workpiece material: Ferrous Sintered metal
Insert: DCMW11T308Hard particles included Cutting speed: Vc = 100 m/min
Depth of cut: ap = 0.2 ~ 0.5 mmCutting speed: Vc = 110 m/minDepth of cut: ap = 0.15 mm Depth of cut: ap = 0.15 ~ 0.3 mm
Feed : f = 0.07 mm/revFeed: f = 0.1 mm/revCoolant : Water soluble type Feed: f = 0.07 ~ 0.25 mm/rev
Coolant : Water soluble typeInterrupted cuttingDry and interrupted cutting

Interrupted cutting T-CBN series for grey cast iron and ductile cast iron

Application area FC Solid coated T-CBN grades

BX930

FC and FCA (JIS) FCD (JIS)

Area for 1500 Area for roughing

  • General purpose, fi rst choice fi nishing

grade.

Dedicated grade for machining 1500 BXC90

BX930 Cast iron BXC90 Ceramic grades

1000ductile(FX105)
BX480· One-piece solid
1000
BX480Conventionalstructure
500· Suitable for interruptedPCBN· Applicable for small
BX930machininggradesto large depths of cut

500

  • Excellent fracture resistance

T515 (Coated carbide)

Continuous Interrupted FCD400 FCD700 0

1.0 2.0 3.0 4.0

Depth of cut (mm) ■ Machining of cylinder liners (Machining example of BX910) ■ Tool life comparison in machining of disc brakes Wear width after machining Tool failure after machining 120 pcs. 120 pcs. 2000

BXC90

0.5 1600 Ceramic

0.4BX910Competitor
1200
0.3Cutting conditions
Cutting conditions800Workpiece material: Disc rotor
0.2Workpiece material:(JIS FC250)
Cylinder liner (Spin casting)Insert: SNGN 120412 BXC90
400a
Machining type: Finish boringDepth of cut: p = 0.7 mm
0.1VFeed: f = 0.35 mm/rev
Cutting speed: c = 1,000 m/min
0Coolant: Dry
0Machine: Special purpose machine1000 800 500 300 Tool life criterion:
Coolant: WetCutting speed: Vc (m/min) Conditions of fi nished surface

BX910 Competitor BX910 For machining cylinder liners