REGIN 3. Cold work tool steel

Transcription

1 Cold work tool steel

2 This information is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should not therefore be construed as a warranty of specific properties of the products described or a warranty for fitness for a particular purpose. 2

3 General REGIN 3 is characterized by a combination of high hardness with good toughness and durability when subjected to mechanical impact. The steel also possesses good hot hardness and can withstand rapid heating and cooling. Typical C Si Mn Cr W V analysis % 0,6 0,8 0,3 1,3 2,5 0,2 Delivery condition Soft annealed to approx. 200 HB Colour code Green Applications REGIN 3 is ideally suited for cold shearing tools, blanking tools, heavy scissors blades, chisels and riveting punches. Other applications include cold heading dies and hot forging tools. The steel is also suited for structural components which require high toughness and wear resistance. Properties Hardness 56 HRC 45 HRC Yield stress Rp0,2 N/mm Tensile strength, Rm N/mm Elongation, A 5 % 8 10 Reduction of area, Z % 40 Notch toughness Mesnager kpm/cm SOFT ANNEALING Soft annealing temperature 780 C (1435 F). The steel is heated slowly and uniformly until it is fully through-heated. Cooling at a rate of about 15 C (30 F) per hour down to 6 C (1200 F), followed by cooling in air. STRESS RELIEVING Temperature 6 C (1200 F). The steel shall be held at this temperature for 1/2 2 hours after it has been fully through-heated. It shall then be cooled in a furnace to 0 C (930 F) and then in air. HARDENING Oil hardening, C ( F) Water hardening, C ( F). The tool shall be preheated slowly and uniformly to about 700 C (1290 F) and then heated relatively rapidly to the austenitizing temperature. Never harden from forging temperature! Water hardening from 900 C (16 F) Distance from centre, mm Heat treatment recommendations FORGING Forging temperature C ( F) light orange to cherry red. Particularly in the case of chisels, final forging should be done at the lower temperature limit, ensuring a tough, optimal structure. The tool should be cooled in dry charcoal breeze, vermiculite or the like. Oil hardening from 920 C (1685 F) Distance from centre, mm 3

4 TEMPERING The steel shall always be tempered. Heating to and cooling from tempering temperature should proceed slowly. The tempering time should be at least two hours at full temperature. Minimum tempering temperature 180 C (355 F). Surface hardness after tempering Austenitizing temperature 880 C (1620 F) 960 C (1760 F) 920 C (1690 F) data recommendations The cutting data below are to be considered as guiding values which must be adapted to existing local condition. TURNING Turning with Turning carbide with high data speed steel parameters Rough turning Fine turning Fine turning m/min f.p.m Feed (f) mm/r 0,3 0,6 0,3 0,3 i.p.r. 0,01 0,024 0,01 0,01 Depth of cut (a p ) mm inch 0,08 0,24 0,08 0,08 ISO P20 P30 P10 Coated carbide Coated carbide or cermet C F Tempering temperature DRILLING High speed steel twist drill Drill diameter Feed (f) mm inch m/min f.p.m. mm/r i.p.r. 5 3/16 14* 46* 0,08 0,20 0,003 0, /16 3/8 14* 46* 0,20 0,30 0,008 0, /8 5/8 14* 46* 0,30 0,35 0,012 0, /8 3/4 14* 46* 0,35 0,40 0,014 0,016 * For coated HSS drill v c ~ 18 m/min. ( 60 f.p.m.). drill Type of drill data Indexable Solid Brazed parameters insert carbide carbide 1) m/min f.p.m Feed (f) mm/r 0,05 0,25 2) 0,10 0,25 2) 0,15 0,25 2) i.p.r. 0,002 0,01 2) 0,004 0,01 2) 0,006 0,01 2) 1) Drill with internal cooling channels and brazed carbide tip. 2) Depending on drill diameter. 4

5 MILLING Face and square shoulder milling Milling with Milling carbide with high data speed steel parameters Rough milling Fine milling Fine milling m/min f.p.m Feed (f z ) mm/tooth 0,2 0,4 0,1 0,2 0,1 inch/tooth 0,008 0,016 0,004 0,008 0,004 Depth of cut (a p ) mm inch 0,08 0,20 0,08 0,08 ISO P20 P40 P10 P20 _ Coated carbide Coated carbide or cermet Welding As is the case with most tool steels, the welding of REGIN 3 is associated with a very high risk of cracking. Where repair welding is necessary recommendations can be obtained from the suppliers of welding electrodes, or from the Uddeholm brochure Welding of Tool Steels. Further information Please, contact your local Uddeholm office for further information on the selection, heat treatment, application and availability of Uddeholm tool steels, including the publication Steels for Cold Work Tooling. End milling Type of milling data Solid indexable High parameters carbide insert speed steel m/min ) f.p.m ) Feed (f z ) mm/tooth 0,03 0,2 2) 0,08 0,2 2) 0,05 0,35 2) inch/tooth 0,001 0,008 2) 0,003 0,008 2) 0,002 0,014 2) ISO K10, P40 P20 P30 _ 1) For coated HSS end mill v c ~ 20 m/min. (66 f.p.m.). 2) Depending on radial depth of cut and cutter diameter. GRINDING A general grinding wheel recommendation is given below. More information can be found in the Uddeholm publication Grinding of Tool Steel. Wheel recommendation Soft annealed Hardened Type of grinding condition condition Face grinding straight wheel A 46 HV A 46 GV Face grinding segments A 24 GV A 36 GV Cylindrical grinding A 46 LV A 60 JV Internal grinding A 46 JV A 60 IV Profile grinding A 100 LV A 120 JV 5