General characteristics stainless steel
Stainless steel has a high corrosion resistance.
the High anti-corrosion properties due to the presence in it of alloying elements on the basis of chromium. Stainless steel has a low coefficient of machinability, which decreases in proportion to the increase in alloying elements such as Nickel and titanium
Features of structural phase States stainless steel
the Austenite: the Most common type of stainless steel with high corrosion resistance due to high content of chromium and Nickel. Has a low coefficient of machinability Used in the food industry.
for Example: 12X18H10T.08X18H10,03Xi8H11.
Ferrite: stainless steel characterized by high chromium content and no Nickel, which helps to improve its machinability
Example: 12X17, AISI410,430,434
Martensite-ferrite stainless steel, which is heat treatable due to the high content of carbon. Have reduced anti-corrosion properties is Used for the manufacture of parts of high hardness.
Martensite: stainless steel on chrome-Nickel basis. Possesses high anticorrosive properties, high mechanical strength and hardness due to a special heat treatment.
Example: AISI 17,15
Austenite-ferrite stainless steel having a high heat resistance. Used in reactive, high temperature environments.
Example: AISI 2304,2507.
Hardening or shot peening the machined surface, leading to increased cutting forces and reduced tool life.
high temperature in the cutting zone due to the low conductivity of stainless steel, which degrades the heat sink and contributes to overheating of the cutting tool when machining stainless steels.
the Decline in the quality of finishing due to the formation of growth on the front surface of the resulting adhesive wear of the cutting gromki.
edge Chipping caused by diffusion wear occurring POI high temperature as a result of interaction items of the machined surface and cutting tool when machining stainless steels.
General guidelines for machining stainless steel,
1) Use a tool, obespechivaushyi improved heat removal from the cutting zone due to its thermal conductivity and geometry.
2) Use the positive tool geometry that reduces cutting forces and prevents sresourcename.
3) Choose rational modes of cutting for processing stainless steel.
4) Choose rationalisation, which provides high heat resistance, mechanical strength, hardness, and low coefficient of friction of shavings on the front surface.