Which kinds of milling cutter does stainless steel treatment use? This is a problem that when CNC is machined, encounters via regular meeting. The machinability of austenite stainless steel is only 0.4, ferrite stainless steel is only 0.48, martensite stainless steel is only 0.55.
1, serious treatment is sclerotic
The treatment sclerosis of stainless steel is very serious. The first kind of choice is the mixture of austenite and ferrite. The 1.4-2.2 that sclerotic layer hardness is former matrix times, intensity R=1470-1960MPa. This kind of stainless steel has very big plasticity and very big coefficient of intensification. In addition, austenite is not stable, easy below the action of cutting force change is martensite.
2, cutting muscularity
Stainless steel has very tall plasticity, especially 2.5 times the deepness of austenite stainless steel is 45# steel. Milling machine plasticity is out of shape big, cutting resistance is great, treatment is sclerotic and serious, hot intensity is high, not easy and curly and break off.
3, cutting temperature is high
The plasticity of stainless steel is out of shape big, attrition muscularity, coefficient of thermal conductivity is relatively inferior. Accordingly, below coequal condition, the temperature of stainless steel milling machine is 200 degrees or so higher than 45 steel.
4, cut is not easy
When processing stainless steel easily agglutinate and form the tumour that accumulate bits. The plasticity of stainless steel and tenacity are bigger, be damaged not easily by milling machine. Below high temperature and high pressure, the tool appears easily adhesive wear and brim are accumulative.
5, the tool is easy wear away
Of course, stainless steel milling cutter applies at processing stainless steel, because the TiC hard spot in stainless steel can bring about cutting tool,serious grinding is mixed wear away. Below high speed, high temperature and high-pressured condition, cutting tool and cutting tool are incidental adhesion, diffuse to wear away depression with crescent moon.
Which kinds of milling cutter does stainless steel treatment use?
When processing stainless steel, tall, wearability, intensity mixes best choice hardness the stuff with tenacity, good thermal conductivity.
Hard alloy material: YG, YW. Use the tungsten cobalt that contains TaC or NbC granule or exceed granule hard alloy. YG6x, YG813, YW4, YD15
High-speed steel material: W6Mo5Cr4V2Al, W10Mo4CrV3Al.
If use 201, 304 wait for material of common stainless steel to undertake milling, use milling cutter of common hard alloy coating please, choose 4 razor blade to undertake proper milling. Next, supplier of each big CNC tool has milling cutter of appropriative stainless steel. If the client is right the price is not sensitive, they can choose the cutting tool of this kind of type. Process 316 stainless steel, quench and when entrance and the stainless steel after heat treatment, tall hardness stainless steel, besides using tall hardness cutting tool, blade of stainless steel cutting wants sharper. Had better use the cutting tool of special stainless steel of all sorts of well-known trademarks.
The reasonable cutting parameter that stainless steel machines
The treatment of stainless steel can be divided for rough machining and finish machining. To rough machining, the YW with relatively inferior content of optional choose TiC and YT hard alloy. Finish machining can choose the YW with TiC high content and YT hard alloy.
Next, machine medium point collapse blade to prevent stainless steel, should increase bit strength, the horn before best choice is little or the horn before losing. When use hard alloy processes stainless steel, actor or actress chosen helix angle is spent for 5-10. If use high-speed steel to establish milling cutter, should choose 35-45 to spend. When milling stainless steel, best choice helix angle establishs milling cutter greatly. If want milling stainless steel canal or thin wall workpiece, can choose taper to establish milling cutter.
Dosage of milling machine of commonly used stainless steel
To milling of hard alloy stainless steel, milling machine speed should be 40~60m/min. Feed should be more than 0.1mm, with avoiding brim of occurrence sclerosis layer, quicken cutting tool to wear away.
High-speed steel establishs milling cutter, cutting speed 8~40m/min, feed speed 0.013~0.15mm/z.
Machine the additional knowledge of stainless steel
Machine sclerotic stainless steel to had better not use high-speed steel to establish milling cutter.
If rolled steel is harder, choose inferior abrade quantity.
If you have knife of a lot of side, choose please slow fast milling machine.
Cutting tool of use coating hard alloy can raise milling machine rate about 50% .
It must let completely cooling when cutting. When cutting tool of use hard alloy processes stainless steel, do not use water-solubility cutting liquid, lest cutting blade has produced great thermal stress and collapse blade.