SUMITOMO T2100Z steel turning selection and troubleshooting

Need for sharper edges, burrs, or surface defects: Choose EFE or EEF. EFE is suitable for precision machining, while EEF is suitable for small depth precision machining.

Pursuing high speed and efficiency: Choose ESE. ESE emphasizes efficient processing.

Need for strong cutting edge, anti chipping edge, or anti notch: choose either SX or EGU. ESX emphasizes blade strength, while EGU further enhances strength.

Positive angle blade: The main chip breaking groove is also ESU. Choose EFP for long-term chip cutting; When a sharp blade is needed, choose ELB or EFB; Choose EGU when strong cutting edge is required; Choose ELU when precision machining small cutting depths.

In actual troubleshooting, if chip entanglement occurs in T2100Z, priority should be given to checking whether the feed is too low and the cutting depth is too small, and then consider switching from ESU to ELU or EFP. If there is a broken edge, check if it exceeds the light intermittent range, and if necessary, switch to ESX or EGU, or reduce the feed and increase the cutting speed. If the surface roughness deteriorates, check whether the cutting edge is worn and whether the chips scratch the machined surface. If necessary, use sharp groove types such as EFE, EEF, or ELB.

Recommended cutting conditions and material matching

T2100Z is suitable for various steel components. The recommended parameters are as follows:

Low carbon steel, low alloy steel (1010, 4135, etc.): continuous to general intermittent, cutting depth 0.008-0.100 inches, feed 0.002-0.010 IPR, cutting speed 165-1150 SFM; Heavy intermittent, cutting depth 0.008-0.100 inches, feed rate 0.002-0.012 IPR, cutting speed 165-1000 SFM.

High carbon steel, high alloy steel (1045, 4140H, etc.): continuous to general intermittent, cutting depth 0.008-0.100 inches, feed 0.002-0.010 IPR, cutting speed 165-925 SFM; Heavy intermittent, cutting depth 0.008-0.100 inches, feed rate 0.002-0.012 IPR, cutting speed 165-925 SFM.

Low carbon steel, structural steel (A36, etc.): continuous to general intermittent, cutting depth 0.008-0.100 inches, feed 0.002-0.010 IPR, cutting speed 165-1320 SFM; Heavy intermittent, cutting depth 0.008-0.100 inches, feed rate 0.002-0.012 IPR, cutting speed 165-1150 SFM.

These parameters indicate that the cutting depth range of T2100Z is wide, from 0.008 inches to 0.100 inches, with a feed coverage of 0.002-0.012 IPR. The cutting speed can reach over 1000 SFM in the precision machining range, but it is recommended to reduce it to below 1000 SFM during heavy interruptions. Under wet cutting conditions, the stability of T2100Z is better. For dry cutting conditions, the cutting speed should be appropriately reduced to avoid the propagation of hot cracks.

Practical Cases: Continuous, End Face, and Intermittent

Continuous external turning of 4135 steel: using CNMG432, vc=1000 SFM, f=. 008 IPR, ap=. 059 inches, wet cut. The wear life of the rear blade surface of T2100Z is 1.5 times that of conventional grades and 2.0 times that of competitor A. After 11 minutes of processing, the wear on the cutting surface of T2100Z is still relatively small, while the conventional grade and competitor A have shown significant wear.

Continuous end face turning of 4118 steel: using CNMG432, vc=0-330 SFM constant line speed, f=. 008 IPR, ap=. 039 inches, wet cutting. The surface roughness of T2100Z processing is equivalent to or better than conventional grades. At the beginning stage of processing, Ra=1.6 μ m, Rz=6.9 μ m, and after wear, Ra=2.5 μ m, Rz=15.8 μ m; At the beginning stage of conventional grades, Ra=1.9 μ m and Rz=8.2 μ m, and after wear, Ra=2.5 μ m and Rz=14 μ m. This indicates that T2100Z can maintain stable surface quality in continuous end face machining.

Intermittent external turning of 4135 steel: using CNMG432, vc=925 SFM, f=. 0098 IPR, ap=. 059 inches, wet cut. The fracture resistance of T2100Z reaches 6000-8000 times, while the conventional grade is about 1000-2000 times, and the competitor B is about 1000-1500 times. The fracture resistance is more than three times that of conventional grades and competitor B. For light intermittent precision machining, the strong and tough matrix of T2100Z significantly suppresses chipping and hot cracking.

Quick troubleshooting for common faults

1. Excessive wear on the back cutting surface: Check if the cutting speed is too high, if the feed rate is too low, and if the cooling is sufficient. T2100Z is suitable for precision machining from medium low speed to medium high speed. If the wear of the rear cutting surface is still fast, the cutting speed can be reduced or the feed rate can be increased to avoid friction between the cutting edge and the workpiece surface.

2. Severe crescent wear: Crescent wear is usually related to high cutting temperatures. If T2100Z shows crescent shaped wear, it indicates that the working conditions may be biased towards the applicable range of hard alloys. Can reduce cutting speed, use coolant, and switch to AC8115P or AC8025P.

3. Broken blade or hot crack: Check if it exceeds the light intermittent range, if the feed is too large, and if the cooling is intermittent. T2100Z has strong fracture resistance, but it is still recommended to use hard alloy for heavy intermittent and strong impact. If there is a broken edge, the feed rate can be reduced, the cutting speed can be increased, and an SX or EGU groove type can be used instead.