Application Analysis of Superhard Tool Solution in Hard Turning

Release time:

2022-07-15

The cutting performance of the coating is obviously better than that of the TiN coating. The life of the machining tool shows that the PVD coating has many advantages, but some coatings such as Al2O3 and diamond tend to use CVD coating technology. Al2O3 is a kind of heat resistance and oxidation resistance The coating can isolate the specific shape of the tool and the heat generated by cutting. Through the super hard tool solution can also integrate the advantages of various coatings to achieve better cutting effect and meet the needs of cutting processing. Then, let's understand the application analysis of the super hard tool solution in hard turning processing!

The cutting performance of the coating is obviously better than that of the TiN coating. The life of the machining tool shows that the PVD coating has many advantages, but some coatings such as Al2O3 and diamond tend to use CVD coating technology. Al2O3 is a kind of heat resistance and oxidation resistance The coating can isolate the specific shape of the tool and the heat generated by cutting. BySuperhard Tool SolutionsCan also integrate the advantages of various coatings to achieve better cutting effect and meet the needs of cutting processing. Then, let's understand the application analysis of superhard tool solutions in hard turning processing!

For example. TiN has low friction characteristics, and the strength, hardness and wear resistance of coated carbide tools are greatly improved compared with carbide tools. It can reduce the wear of the coating structure, TiCN can reduce the wear of the flank, the hardness of the TiC coating is high, and the Al2O3 coating has excellent heat insulation effect. In recent years, some manufacturers have applied methods such as improving coating materials to greatly improve the performance of coated tools. For example, some manufacturers in the United States and Japan use Swiss AlTiN coating materials and new coating patented technology to produce coated inserts. Workpieces with turning hardness of HRC45 ~ 55 can be turned at high speed with low-cost coated cemented carbide. The hardness is as high as HV4500 ~ 4900, the blade life is 4 times that of the general coated blade, the cost is only 30%, and the adhesion is also very good. Ceramic material Ceramic tool material with its composition structure and stamping technology continues to improve, especially the development of nanotechnology, so that the strengthening of ceramic tools possible, can be cut at a speed of 498.56 m/min hardness of HRC47 ~ 58 die steel. When the turning temperature reaches 1500 ~ 1600C, the hardness does not decrease and does not oxidize. In the near future, ceramics will cause the third revolution of cutting after high-speed steel and cemented carbide.

Ceramic cutting tools have the advantages of high hardness (HRA91 ~ 95), high strength (bending strength 750 ~ 1000MPa), good wear resistance, good chemical stability, good adhesion resistance, low friction coefficient and low price. Not only that, the cutting speed can reach 2 to 5 times of cemented carbide. Especially suitable for high hardness material processing, finishing and high-speed machining, can be cut to HRC65 a variety of hardened steel and hardened cast iron. Ceramic cutting tools have high temperature hardness and can reach HRA80 at 1200C. Ordinary cutting, the durability of ceramic tools is extremely high, commonly used in alumina-based ceramics, silicon nitride-based ceramics, cermets, whisker reinforced ceramics. Superhard Tool Solutions

Composite poly cubic boron nitride (PCBN) tools with high CBN content have high hardness, good wear resistance, high compressive strength and good impact resistance. CBN tools have low CBN particle content and use ceramics as binder. Although their hardness is low, they make up for the poor thermal stability and low chemical inertness of the former materials, but their disadvantages are poor thermal stability and low chemical inertness. They are suitable for cutting heat-resistant alloys, cast iron and iron sintered metals. Used in hardened steel cutting. Therefore, a cost-benefit and processing quality analysis should be conducted to decide which one to choose. Figure 3 shows the rear face wear of Al2O3, Si3N4 and CBN tools for processing gray cast iron. The cutting performance of PCBN tool material is better than that of Al2O3 and Si3N4. Ceramic and PCBN tools for cutting hardened steel residual stress in the cutting of gray cast iron and hardened steel can choose ceramic tools or CBN tools, but hardened steel dry cutting, Al2O3 ceramic cost is lower than PCBN material. When the feed rate is small, it is suitable to use ceramic tools. PBN tools are suitable for cutting workpieces with higher hardness than HRC60. Ceramic knives have good thermochemical stability, but they are not as good as the toughness and hardness of PCBN tools. The cutting hardness is below HRC60, especially suitable for automatic processing and high-precision processing. Superhard Tool Solutions

In addition, in the case of the same flank wear, the residual stress on the surface of the workpiece after cutting by the PCBN tool is relatively stable than that of the ceramic tool. Thus, the metal in the tip region is locally softened by the heat generated in the cutting region, and the wear of the PCBN tool can be effectively reduced. Dry cutting of hardened steel using PCBN tools should follow the following principles: Select the cutting depth allowed by the rigidity of the machine tool. In addition, it should also be considered that the PCBN tool has poor thermal conductivity under small cutting depth, the thermal diffusion of the cutting zone is not timely, and the shearing zone can also produce obvious metal softening effect and reduce cutting edge wear.

The above introduction isSuperhard Tool SolutionsApplication analysis in hard turning processing, if you need to know more, please feel free to contact us!