Life Articles

A cutting edge family of Iscar turning inserts brings Sumo Tec performance and durability to CVD and DVD carbide grades. In the same tests in a variety of turning applications, the inserts out performed their closest competitors by 26 to 288 percent. The key to the lengthened life is the Sumo Tec unique treatment, introduced in late '07 in a limited range of milling inserts, that flattens the coated surface and reduces surface tension stresses in insert coatings. These result cooler running, greater chipping resistance, lowered built up edge and faithfully longer edge life in all workpiece metals. During the alumina coating procedure, internal tension stresses occasionally cause cracks. The new Sumo Tec treatment leads to compression stresses, which helps to seal these cracks. The seven completely new Sumo Tec turning grades consist of 2 for cast iron; 3 for steel and one for heat-resistant alloys and hardened steel. All the most preferred insert geometries are available from inventory, with new geometries being added frequently. Iscar also plans to add new grades additionally.

Here are the grades available:

FOR CAST IRON
IC5005, with a hard substrate, MTCVD TiCN and thick Al2O3 coating, is endorsed mainly for nodular cast iron. It also handles other cast irons at medium to high cutting speeds at stationary or slightly unstable conditions. This grade may be used in hard cast irons when especially high wear resistance is required.

IC5010, headlining a tough substrate, MTCVD TiCN and thick Al2O3 coating, targets grey cast iron. It is endorsed for interrupted cuts and unstable turning conditions in other materials.

FOR STEEL
IC8150, consisting of a extremely hard substrate with a cobalt enriched outer layer, MTCVD TiCN and a thick alpha Al2O3 CVD coating. Featuring extraordinary thermal stability and resistance to chipping, this grade is favored for high speed turning of steel subjugated to stable or slightly unstable conditions. It can also handle stainless steel and interrupted cuts in nodular cast iron.

IC8250, a tough substrate with the same outer layers. It features remarkable thermal stability and protection to plastic deformation and is advocated for general machining of alloyed and stainless steel in a extensive range of conditions.

IC8350, featuring a very tough substrate under the same outer layers. It accomplishes outstanding shock protection and great wear resistance on alloyed and stainless steel.

For Alloys, Stainless Steel and Hardened Steel
IC807, with a tough submicron substrate under a TiAlN PVD coating, is suitable for turning heat resistant alloys, austenitic stainless steel and hard steel at low to medium cutting speeds. In a test opposite its nearest competitor on all three materials, the advancement in tool life was up to 150%.

Key Test Results
Prior to unveiling the new SUMO TEC turning tool family, ISCAR tested all grades against their closest opponent in a range of applications. Here are the crucial results for grades 5005 and 5010 in cast iron. The advancement was 47% in SAE 1045 steel and 250% in 4140. In forging steel, the brand new Sumo Tec insert lasted 2X as long.

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