Общий каталог Sumitomo 2019 - 2020 - страница 12

Steel

Grades AC8015P / AC8025P / AC8035P / AC1030U

Covers a wide range of machining applications from high-speed to interrupted cutting and small lathes AC8015P : Development of crater damage is suppressed by controlling the orientation of the alumina crystal grains. Achieves long, stable tool life during high-speed and high feed cutting. AC8025P : Our 1st recommended grade for turning steel. Surface smoothing technology significantly suppresses adhesion of work material components. Achieves long, stable tool life with various cutting speeds and work materials. AC8035P : Tensile stress removal of the coating layer greatly improves fracture resistance. Achieves long, stable tool life during heavy interrupted cutting.

A AC1030U : Employs a new PVD coating, and a dedicated tough carbide substrate. High-quality cutting edge grade suppresses adhesion and micro-chipping, realizing excellent machined surface quality.

Performance

AC8015P

• Alumina crystal grain orientation control technology suppresses crater damage due to chip abrasion

Conventional Tool 5min5min 14min14min

Al O 2 3

TiCN TiCN layer exposed Tool life Crater damage progression due to

peeling of alumina layer Crystal orientation not aligned Work Material: SUJ2 (O.D. Continuous) Insert: CNMG120408N-GU Cutting Conditions: v =300m/min, f=0.3mm/rev, a =1.5mm Wet c p

AC8015P

5min5min 17min17min 29min29min

Al O 2 3

TiCN

Crystal orientations aligned in the same direction Minor Wear TiCN layer exposed Tool life

Significantly suppresses alumina layer damage Suppresses crater damage due to chip abrasion Twice the crater wear resistance

AC8025P

• Surface smoothing treatment significantly suppresses adhesion and chipping

Conventional Tool 2min2min 70min70min

SEM imageSEM image

Ra 0.4μm

AC8025P

SEM imageSEM image

2min2min 70min70min 120min120min

Normal Wear Minor Damage Only, Able to Continue

Ra 0.04μm At least twice the adhesion/fracture resistance

Suppresses adhesion with ultra-smooth surface

AC8035P

• Special surface treatment reduces tensile stress in the coating layer, significantly suppressing breakages Conventional Tool

0.20 SEM imageSEM image 0.25 0.30

0 0.1 0.2 0.3 0 250 500

Tensile stress in coating (GPa) No. of Impacts Unable to Continue

Work Material: SCM435 (O.D. Interrupted) Insert: CNMG120408N-GU Cutting Conditions: vc=160m/min, f=0.2-0.3mm/rev, ap=2.0mm Dry AC8035P 0.20

SEM imageSEM image Tensile Stress 0.25 90% Reduced 0.30

0 0.1 0.2 0.3 0 250 500

Tensile stress in coating (GPa) No. of Impacts All Corners Able to Continue

Suppresses crack growth and breakages by reducing tensile residual stress At least twice the fracture resistance