CNC machining hard 304 stainless steel

Because of its own material, many people are very distressed when Machining Stainless Steel with CNC. They don't know what kind of tool to use? How much is the amount of knife to eat? What is the speed and feed?
Case study: For example, to process an 80×40 circulating groove with a groove width of 5mm and a depth of 3mm, I used a white steel knife with a diameter of 4 to make rough. Basically, one piece is broken and one knife is broken. The cutting depth is 1.5, the feed is about 50-80, but I don't know how to adjust the processing? At this time, two aspects need to be analyzed.

1. How to choose a tool when Cnc Machining Stainless Steel?

Ordinary tools are more expensive to process stainless steel, and the results are not very good. If the batch is large, it is recommended to develop a special stainless steel tool; if it is a single piece of processing, the feed can be set to about 0.05mm per revolution for a single edge , That is to say, for three-flute milling cutter, S=2400, F=360, Z direction generally should not exceed 1MM, just between 0.5-0.7MM. If not, you can use alloy coating. 4-edge, change to depth of cut between 0.1~0.3, speed 1300~3000, feed 600~1200, depending on the tool you choose, the high-speed cutting efficiency can be faster. Stainless steel is difficult to machine, and the key lies in the tool. Such workpieces generally take 10 to 20 minutes, including clamping, depending on your machine tool and tool selection. Your depth of cut, speed and feed directly affect the life of your tool, which requires long-term accumulation of experience.

2. What are the characteristics of CNC Machining stainless steel?
Stainless steel itself is actually not high in hardness, but it has strong toughness, poor cutting performance, and easy sticking, so it hurts the knife, the workpiece is volatile, and it is easy to work hardening. The cutting tool should be sharp, the speed should not be high, the feed is generally around F1500, the amount of cutting tool should be reduced as much as possible, and the concentration of cutting fluid should be high.