Ceramic Inserts For Turning Hardened Tool Steel

Ceramic inserts for metalworking under the spk brand ceramtec offers a unique program in terms of scope diversity and performance of indexable inserts made of ceramic cutting materials polycrystalline cubic boron nitrides cbn and cermets for turning grooving milling and boring in a wide variety of industrial applications.

Ceramic inserts for turning hardened tool steel.

Turning inserts and grades for hardened steel. Grades of ceramic insert available al2o3 commonly known as a white ceramic is suitable for both roughing and finishing applications for turning milling cast iron. Cermets work well for hard turning too. Mixed ceramics are used in hard part turning of hardened steels hard turning of rolls and fine machining of work pieces made of grey cast iron.

Introduction in our days the machining of steel parts in hard state has great significance. Pure ceramic tools have found limited success in hard turning due to their poor thermal shock resistance and fracture strength. Turning 62 rockwell hardened steel with a ceramic insert on my grizzly g0602 10x22 lathe. They are better if you don t have the rpms to get the right sfms you really need.

To establish machining parameters to mill hardened steels with carbide inserts generally start at 100 sfm. Insert geometries with a neutral or slight negative rake typically provide stronger edges than positive rake inserts. Al2o3 tic composite ceramic commonly known as black ceramic is suitable for machining hardened materials up to 65 hrc. Mixed ceramics are composite materials made of aluminium oxide and a titanium hardening component with excellent wear resistance and edge stability even at high temperatures.

The q32 is a valenite grade also one of those hot pressed silicon nitrides. Usual feed rate is 0 003 to 0 004 inch per tooth. Test cuts can build up to speeds from 150 to 180 sfm. If i don t have the right holder a blob of jb weld on a 3 4 square length of keystock works fine in a pinch.

Whatever your component or requirements for surface finish find productive insert grades here that can withstand high temperatures and cutting forces and still retain their cutting edges. Those ceramics will do hard steels but cbn is the best choice for hard steels above 50rc. The black ceramics are usually silicon nitride and are best for very high rate machining of cast irons. 1 turning of hardened steel with ceramic tool orosz lászló 1 biró szabolcs 2 horváth richárd 2 1 product expert sandvik magyarország kft 2 department engineer bmf bgk 1.

Such characteristics make them unsuitable as tool materials in hardened steel turning of interrupted surfaces luo et al 1999.