astm d2 tool steel round bar hot rolled/forged

astm d2 tool steel round bar hot rolled/forged

astm d2 tool steel round bar hot rolled/forged

Supply of astm d2 tool steel round bar hot rolled/forged

		Sheet	Plate	Flat	Diameter

Applications of astm d2 tool steel round bar hot rolled/forged

  A popular grade for toolmakers, astm d2 tool steel round bar hot rolled/forged is used in a wide variety of tool making applications. Typical applications include blanking dies and punches for sheet in stainless steel, brass, copper, zinc and hard abrasive materials generally. Other application include deep drawing dies, cupping dies, forming dies, sheet metal forming rolls, shear blades for strip and sheet including flying shears, circular cutters for cold rolled strip, trimmer dies, thread rolling dies, cold extrusion dies, broaches, plug gauges, ring gauges, special taps, straybolt taps, brick and tile mould liners, master hobs for cold hobbing plastic moulds and cut moulds for plastics.

Forging of astm d2 tool steel round bar hot rolled/forged

Heat the astm d2 tool steel round bar hot rolled/forged tool steel slowly and uniformly to 700°C then more rapidly to 900-1040°C. After forging cool down slowly.

When tools made from astm d2 tool steel round bar hot rolled/forged tool steel are heavily machined, ground or otherwise subjected to cold work, the relief of internal strains is advisable before hardening to minimise the possibility of distortion. Stress relieving should be done after rough machining. To stress relieve, heat the component to 600-650°C. Soak well and cool in the furnace or in air. The tools may then be finish machined before hardening.

Hardening of astm d2 tool steel round bar hot rolled/forged

Martempering  of astm d2 tool steel round bar hot rolled/forged

Martempering is an alternative hardening procedure which may be used when suitable salt bath equipment is available. By this method internal strain, distortion and risk of quench cracking are reduced to the minimum. Pre-heat dry at 300-400°C. Pre-heat in salt at 800-850°C holding in the salt for ten minutes per inch of ruling section. Raise to the hardening temperature of 950-980°C holding in the salt for ten minutes per inch of ruling section. Marquench in salt at 230-250°C holding in the bath for five minutes 25mm of ruling section. Cool in still air. Tempering will be necessary. 
 

Tempering of astm d2 tool steel round bar hot rolled/forged

Double tempering is recommended. Tempering of astm d2 tool steel round bar hot rolled/forged should be done with the least possible delay after hardening, preferably when the tools are still hand warm. Select a suitable tempering temperature, bearing in mind the service requirements. Heat slowly and uniformly. When the astm d2 tool steel round bar hot rolled/forged component has reached the desired temperature, soak for at least one hour per 25mm of section. The second tempering should be a repetition of the first. 

Heat treatment of astm d2 tool steel round bar hot rolled/forged

Final Grinding of astm d2 tool steel round bar hot rolled/forged

Select the correct grade of wheel in consultation with the grinding wheel manufacturer. Ensure the grinding wheel is in good condition by means of a suitable dressing tool. Wet grinding is a preferable option using a copious supply of coolant. If dry grinding is resorted to then use a very soft wheel.

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