![]() The softer the work material, the faster the recommended cutting speed (See Figure 1).įigure 2: Increasing Cutting Speed Based on Cutting tool hardness Table 1: Cutting Speeds for Material Types ![]() The harder the work material, the slower the cutting speed. The hardness of the work material has a great deal to do with the recommended cutting speed. Cutting speeds depend primarily on the kind of material you are cutting and the kind of cutting tool you are using. All cutting tools work on the surface footage principle. Surface speed is measured in surface feet per minute (SFM). ![]() If two tools of different sizes are turning at the same revolutions per minute (RPM), the larger tool has a greater surface speed. Surface speed, surface footage, and surface area are all directly related. Explain how to correctly set up for power feed tapping.Ĭutting speed is defined as the speed at the outside edge of the tool as it is cutting.Calculate cutting speeds and feeds for end milling operations. ![]() Select a proper cutting speed for different types of materials.Identify and select vertical milling machine setups and operations for a variety of machining tasks.Post machining decontamination and passivation are recommended.3 Unit 2: Speeds, Feeds, and Tapping ObjectiveĪfter completing this unit, you should be able to: MachiningĪlloy 410 stainless steel plate is best machined in the annealed condition at surface speeds of 60 – 80 feet (18.3 – 24.4m) per minute. If a plate undergoes substantial deformation it should undergo a re-anneal or stress-relieving treatment at about 1202☏ (650☌). For smaller plate deformation such as bending, preheating should be done in the 212 – 572☏ (100 – 300☌) temperature range. It is typically done in the 1382 – 2102☏ (750 – 1150☌) range followed by air cooling. The alloy can be cold worked with moderate forming in the annealed condition. Tempering – Heat to 1100 – 1400☏ (593 – 760☌) for 1 to 4 hours, air cool Cold Forming Stress Relieving – Heat to 300 – 800☏ (149 – 427☌) for 1 to 2 hours, air cool Weight % (all values are maximum unless a range is otherwise indicated)Īnnealing – Heat slowly to 1500 – 1650☏ (816 – 899☌), cool to 1100oF (593☌) in furnace, air cool Oxidation ResistanceĪlloy 410 stainless steel plate resists oxidation up to 1292☏ (700☌) continuously, and up to 1500☏ (816☌) on an intermittent basis. However, the alloy is prone to chloride attack, particularly in oxidizing conditions.Ĥ10 stainless steel plate stainless steel plate operates well in environments requiring moderate corrosion resistance and high mechanical properties. It performs well in oil and gas applications where desaereted and low hydrogen sulfide exist. The alloy is also resistant to acids contained in foods.Ĥ10 stainless steel plate can also be used in slightly chlorinated and desaereted water. It can be used in environments containing weak or diluted acetic acid, naptha, nitric acid and sulfuric acid. Alloy 410 stainless steel plate is resistant to atmospheric conditions, water and some chemicals.
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