The Cutting tools for hard turning quenched steel and the choice
Coated carbide material inserts
Coated carbide inserts is coating on Good toughness carbide cutting tools by the thickness of 2-18µm.It lowers its heat conduction coefficient after coating and abate the hot action of cutting tool substrate, Coating can effectively improve the cutting process of friction and adhesion effect, reducing the heat caused during cutting. Coated carbide cutting tools has a better strength, hardness and wear resistance than the carbide cutting tools. Low-cost coated carbide inserts can realize low speed when turning the work piece which hardness was under HRC45.
Ceramic material inserts
Cutting speed of ceramic inserts is 3-5 times faster than carbide inserts with normal machining.Ceramic inserts especially suit for processing hardness materials with high speed,finishing processing and high speed processing . We can choose ceramic inserts to finishing the quenched steel with hardness between HRC45-HRC55,and had better avoiding the interrupted turning.
CBN(Cubic Boron Nitride) material inserts
The hardness and wear resistance of CBN inserts are second only to diamond ,has a wonderful hot hardness,and also has a better impact strength and breakage resistance compared with ceramic inserts. It widely be used for turning the Hardened steel (more than 50 HRC), Pearlitic gray cast iron and chilled cast iron and superalloy. CBN inserts has a much higher cutting speed than carbide inserts.
PCBN inserts with high content CBN element is harder,better wear resistance,better compressive impact and toughness ,but its defect is low thermo stability and chemical inertness,which suitable for machining heat resistant alloy, cast iron and iron series sintered metal. CBN particle content in the composite PCBN cutting tools is low, using the ceramic as binder, which hardness is low, but make up for the before one materials defect which low thermal stability, chemical inertness.
Coated carbide inserts is coating on Good toughness carbide cutting tools by the thickness of 2-18µm.It lowers its heat conduction coefficient after coating and abate the hot action of cutting tool substrate, Coating can effectively improve the cutting process of friction and adhesion effect, reducing the heat caused during cutting. Coated carbide cutting tools has a better strength, hardness and wear resistance than the carbide cutting tools. Low-cost coated carbide inserts can realize low speed when turning the work piece which hardness was under HRC45.
Ceramic material inserts
Cutting speed of ceramic inserts is 3-5 times faster than carbide inserts with normal machining.Ceramic inserts especially suit for processing hardness materials with high speed,finishing processing and high speed processing . We can choose ceramic inserts to finishing the quenched steel with hardness between HRC45-HRC55,and had better avoiding the interrupted turning.
CBN(Cubic Boron Nitride) material inserts
The hardness and wear resistance of CBN inserts are second only to diamond ,has a wonderful hot hardness,and also has a better impact strength and breakage resistance compared with ceramic inserts. It widely be used for turning the Hardened steel (more than 50 HRC), Pearlitic gray cast iron and chilled cast iron and superalloy. CBN inserts has a much higher cutting speed than carbide inserts.
PCBN inserts with high content CBN element is harder,better wear resistance,better compressive impact and toughness ,but its defect is low thermo stability and chemical inertness,which suitable for machining heat resistant alloy, cast iron and iron series sintered metal. CBN particle content in the composite PCBN cutting tools is low, using the ceramic as binder, which hardness is low, but make up for the before one materials defect which low thermal stability, chemical inertness.
Summarize
We can choose both ceramic and CBN inserts when machining the hardened steel,so you can analyze the producing cost and machining quality so that which one is more economical. PCBN material cutting tools has a better performance than Al2O3 ceramic inserts, and the latter has a better thermal chemical stability.But PCBN inserts has a much harder and better toughness.Generally ,ceramic inserts is the better choice when machining the hardened steel work piece with hardness less than HRC50 with thin cutting depth and small feed rate.while PCBN tool is suitable for machining the work piece with hardness above 50 HRC, especially for automation and high precision machining .In addition , with the same blade wear, PCBN cutting tools has a better stable residual stress than ceramic inserts after they stand the same wear of the cutting tools flank cutting surface. In addition,ceramic inserts should avoid using for roughing and semi-finishing, Halnn developed integral CBN inserts can be suitable for interrupted turning , hard roughing the hardened steel overloading.
We can choose both ceramic and CBN inserts when machining the hardened steel,so you can analyze the producing cost and machining quality so that which one is more economical. PCBN material cutting tools has a better performance than Al2O3 ceramic inserts, and the latter has a better thermal chemical stability.But PCBN inserts has a much harder and better toughness.Generally ,ceramic inserts is the better choice when machining the hardened steel work piece with hardness less than HRC50 with thin cutting depth and small feed rate.while PCBN tool is suitable for machining the work piece with hardness above 50 HRC, especially for automation and high precision machining .In addition , with the same blade wear, PCBN cutting tools has a better stable residual stress than ceramic inserts after they stand the same wear of the cutting tools flank cutting surface. In addition,ceramic inserts should avoid using for roughing and semi-finishing, Halnn developed integral CBN inserts can be suitable for interrupted turning , hard roughing the hardened steel overloading.
More information,http://www.halnntools.com/pro ,Or contact with us halnntools@gmail.com,whatsapp:+8615036165377,skype:cbn_inserts_angels
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