Steel with a manganese content of about 11% to 18% is called high manganese steel. The hardness after water toughening treatment and work hardening can reach HB450-550. It is often used as a wear-resistant casting. High-manganese steel castings can be divided into high-carbon and high-manganese wear-resistant. Steel, medium carbon high manganese non-magnetic steel, low carbon high manganese steel and high manganese heat resistant steel, the most common high manganese steel grade is ZGMn13. When processing high manganese steel, cutting force increases due to severe work hardening, cutting temperature High, which exacerbates tool wear and can easily cause tool chipping. In the early days, the hardness of the high-manganese steel was commonly used. The hardness of the carbide insert was 89~94HRA, which is equivalent to 71~76HRC. For the high manganese steel castings above HRC40, the carbide insert is easy to burn. Moreover, the processing efficiency is low, and the later ceramic blades and cubic boron nitride blades have high hardness, but because of the brittleness, the phenomenon of easy chipping has been plagued by producers. In view of the hard and brittle characteristics of cubic boron nitride inserts, Valin super-hard HLCBN is suitable for interrupted cutting and heavy-duty roughing cubic boron nitride insert grade BN-S20, which can not only cut the surface of high manganese steel casting blanks intermittently. And the BN-S20 grade is made of ceramic adhesive, which avoids the durability of the blade due to the addition of metal adhesive. The tool life is more than 2 times higher than that of the traditional cubic boron nitride tool, but the tool is not sacrificed. The wear resistance, "the perfect balance between wear resistance and impact resistance" is also one of the reasons why the HLCBN brand stands in the world's superhard tool industry. At the same time, the tool academics at home and abroad enjoy high reputation, while Valin super hard The concept of “tailoring tailoring†service has been well received in the industry. Case of BN-S20 grade processing of high manganese steel and cutting amount 1. Case of BN-S20 turning high manganese steel and cutting amount: Take the wear parts of high manganese steel cone crusher as an example (pictured): 
For roughing, take αp = 6~10 mm; the amount of cutting Fr=0.25-0.8mm/r; cutting speed v=85m/min; αp =1～3 mm for semi-finishing; f=0.2～0.4 mm/ r; fine car ap ≤ 1 mm; f ≤ 0.2mm / r; cutting line speed v = 135m / min, tool durability: 3 hours / cutting edge! The blade can be rotated 8 times to 12 times, and one blade can be used in three classes. It can be seen that the cost of using the BN-S20 tool has a great advantage compared with other tool grades. Moreover, the surface of the rough high-manganese steel blank (the above-mentioned casting defects such as sand and pores in the high-manganese steel casting) has no fear of chipping and chipping. 2, BN-S20 grade milling high manganese steel case and cutting amount: Take the BN-S20 grade blade milling high manganese steel casting tooth plate plane as an example, for interrupted cutting surface milling, cutting amount ap = 2.5mm; Tool size Fr=0.25-0.4mm/r; line speed Vc=90m/min. Suitable for gantry milling machine, milling machine for milling high manganese steel; also suitable for high-speed milling of high-manganese steel in machining center, BN-S20 tool grade in milling high Manganese steel exhibits strong impact toughness. When the machined surface is irregular, the tool will not collapse and crack (as shown in the following figure: Intermittent face milling of high manganese steel castings and face milling cutters used) 
BN-S20 use precautions and tool use economy type 1, cubic boron nitride overall polycrystalline BN-S20 grade can eat more than 7mm depth of the knife, than ordinary ceramic tools and CBN tools impact resistance. Especially for the poor processing of the casting surface, the roughing can be pulled out, and the workpiece does not have to be polished and smoothed before processing. 2, BN-S20 tool CBN content and cutting edge are developed for the processing characteristics of manganese steel castings, targeted; can not be used to process ordinary mild steel parts such as 45# mild steel. 3. When using high-manganese steel with BN-S20 tool grade, the amount of cutter per revolution varies according to the main deflection angle of the cutter bar, and it cannot be generalized. 4, BN-S20 brand blade is a machine clip indexable CNC blade (including turning inserts and milling inserts), in addition to processing high manganese steel castings, it is also applied to high-speed steel rolls with hardness HSD85 or higher, hardness HSD90 or more cold rolling Forged steel rolls, large GCr15 bearing steel HRC62 hard turning, and high-alloy steel castings such as high-chromium steel roughing and high-speed finishing, and in the mold steel and other quenching materials, the amount of grinding materials used to use the car to grind or car In the field of rough grinding.
For roughing, take αp = 6~10 mm; the amount of cutting Fr=0.25-0.8mm/r; cutting speed v=85m/min; αp =1～3 mm for semi-finishing; f=0.2～0.4 mm/ r; fine car ap ≤ 1 mm; f ≤ 0.2mm / r; cutting line speed v = 135m / min, tool durability: 3 hours / cutting edge! The blade can be rotated 8 times to 12 times, and one blade can be used in three classes. It can be seen that the cost of using the BN-S20 tool has a great advantage compared with other tool grades. Moreover, the surface of the rough high-manganese steel blank (the above-mentioned casting defects such as sand and pores in the high-manganese steel casting) has no fear of chipping and chipping. 2, BN-S20 grade milling high manganese steel case and cutting amount: Take the BN-S20 grade blade milling high manganese steel casting tooth plate plane as an example, for interrupted cutting surface milling, cutting amount ap = 2.5mm; Tool size Fr=0.25-0.4mm/r; line speed Vc=90m/min. Suitable for gantry milling machine, milling machine for milling high manganese steel; also suitable for high-speed milling of high-manganese steel in machining center, BN-S20 tool grade in milling high Manganese steel exhibits strong impact toughness. When the machined surface is irregular, the tool will not collapse and crack (as shown in the following figure: Intermittent face milling of high manganese steel castings and face milling cutters used) BN-S20 use precautions and tool use economy type 1, cubic boron nitride overall polycrystalline BN-S20 grade can eat more than 7mm depth of the knife, than ordinary ceramic tools and CBN tools impact resistance. Especially for the poor processing of the casting surface, the roughing can be pulled out, and the workpiece does not have to be polished and smoothed before processing. 2, BN-S20 tool CBN content and cutting edge are developed for the processing characteristics of manganese steel castings, targeted; can not be used to process ordinary mild steel parts such as 45# mild steel. 3. When using high-manganese steel with BN-S20 tool grade, the amount of cutter per revolution varies according to the main deflection angle of the cutter bar, and it cannot be generalized. 4, BN-S20 brand blade is a machine clip indexable CNC blade (including turning inserts and milling inserts), in addition to processing high manganese steel castings, it is also applied to high-speed steel rolls with hardness HSD85 or higher, hardness HSD90 or more cold rolling Forged steel rolls, large GCr15 bearing steel HRC62 hard turning, and high-alloy steel castings such as high-chromium steel roughing and high-speed finishing, and in the mold steel and other quenching materials, the amount of grinding materials used to use the car to grind or car In the field of rough grinding.Usb Microscope Camera ,Usb Microscope 1000X,Microscope Digital 1600X,Usb Microscope Linux
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