Improve tool performance, the most basic research direction is to improve tool materials. This involves both the substrate and the coating.
The cemented carbide substrate has a basic characteristic that the higher the toughness, the lower the wear resistance; vice versa. Therefore, when performing interrupted cutting, such as milling, non-continuous turning, a base body with high toughness can be selected; when continuous finishing is performed, a base having high wear resistance needs to be selected.
The development of ultra-fine grain grades broke the conventional law of the matrix. Ultra-fine grain grade, both high wear resistance and high toughness. This opens up a channel for the versatility of the blades and tools. Iska's IC07, IC08 ultra-fine grained carbide substrate is a model for general-purpose cemented carbide substrates. Both high wear resistance and high toughness. In particular, the IC908 after coating treatment can be used for drilling, grooving and milling of steel, hardened steel, stainless steel, superalloy and cast iron by virtue of the perfect combination of substrate and coating. IC908 has been on the market for many years, and it has won the trust of many users because of its outstanding performance in processing.
Over the years, coating technology has also made great strides. So, what are the advantages of Iskar in coating technology?
1. Medium temperature chemical vapor coating (MT-CVD)
Ti(C,N) prepared by medium temperature chemical vapor coating (MT-CVD, deposition temperature 700-900 °C) and high temperature chemical vapor coating (HT-CVD, deposition temperature 900-1100 °C) Compared with Ti (C, N), the former has a dense coating structure, a thickness of more than 10 μm, and a columnar crystal, and the stress on the surface of the tool is also reduced after coating. This carbide coating has higher wear resistance, thermal shock resistance and higher toughness. When applied to high-speed heavy cutting under severe conditions, tool life is significantly improved in dry machining. Iskar uses medium-temperature chemical vapor deposition coating technology in class P grades such as IC8150-IC8350 and IC9150-IC9350, and IC grades such as IC5005, IC5010, and IC5100.
2. Cemented carbide α-Al 2 O 3 coating technology
When Al2O3 coating is deposited, Al2O3 will exhibit different crystal phases, such as γ, δ, α, κ-Al 2 O 3 , and only α-Al 2 O 3 is a thermodynamically stable structure. Due to variations in process conditions, a mixture of alpha phase, κ phase Al 2 O 3 is often obtained, which reduces the performance of the coating. Iskar can now obtain pure α-Al 2 O 3 by strictly controlling the process parameters, and control the crystal growth direction, which is a columnar structure. Name this technology alpha-TEC. Iskar also applied the α-TEC technology to the P class grades such as IC8150-IC8350 and IC5400, and the K grades such as IC5005, IC5100 and IC5010.
α-TEC
3. Using composite coating (DO-TEC)
The technology is based on a medium temperature chemical vapor coating (MTCVD) surface for PVD coating. Iskar's DT7150 grade uses this technology, TiCN is the bottom layer, Al2O3 is the middle layer, TiN is the transition layer, both use medium temperature chemical vapor coating technology, TiAlN is the top layer, using PVD coating technology. This grade is excellent in medium-high speed milling of gray cast iron and ductile iron.
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