કોલ્ડ વર્કિંગ ટૂલ સ્ટીલ D2 1.2379 SKD11 શીટ્સ

D2 provides an effective combination of wear resistance and toughness, tool performance, price, and a wide variety of product forms. Also available as an Electro-Slag-Remelted (ESR) product. 

1. Grade:DIN1.2379/JIS SKD10/AISI D2/GB Cr12Mo1V1

2. Condition:Hot rolled ,Annealed, Black surface

3. Hardness:≤255HBS  

કાર્યક્રમો:

AISI grade D2 tool steels are used for long run tooling applications, where wear resistance is important, such as blanking or forming dies and thread rolling dies.

રચના

વિશિષ્ટતાઓ:

Density: 0.278 lb/in3 (7695 kg/m3)

ચોક્કસ ગ્રેવીટી: 7.70

Modulus of Elasticity: 30 x 106 psi (207GPa)

મશીનરીબિલિટી: 

50% કાર્બન સ્ટીલનો 60-1%

Preheating: To minimize distortion and stresses in large or complex tools use a double preheat. 

Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1150-1250°F (621-677°C) equalize, then heat to 1400-1450°F (760-788°C). 

સામાન્ય સાધનો માટે, એક પ્રીહિટીંગ ટ્રીટમેન્ટ તરીકે માત્ર બીજી તાપમાન શ્રેણીનો ઉપયોગ કરો.

ઓસ્ટેનિટાઇઝિંગ (ઉચ્ચ ગરમી):Heat slowly from the preheat. Furnace or Salt: 1850-1875°F (1010-1024°C).

શમન:Air or pressurized gas to 150-125ºF (66-51ºC). Sizes up to 4 inches (101.6 mm) in thickness will through harden when air cooled from 1575ºF (857ºC). Sizes up to 6 inches (152.4 mm) in thickness will through harden when air cooled from 1625ºF (885ºC).

ટેમ્પરિંગ:Temper immediately after quenching. Hold at temperature for 1 hour per inch (25.4 mm) of thickness, 2 hours minimum, then air cool to ambient temperature. The typical tempering range is 350 to 400ºF (177 to 204ºC).

મહત્તમ વસ્ત્રો પ્રતિકાર માટે, 300-350 HRC ની કઠિનતા માટે 149-177°F (62-64°C) વચ્ચે સ્વભાવ રાખો. વસ્ત્રોના પ્રતિકાર અને કઠિનતા વચ્ચેના શ્રેષ્ઠ સંતુલન માટે, 500-550°F (260-288°C) વચ્ચે સ્વભાવ રાખો. આ 58-60 HRC પેદા કરશે.

For maximum toughness, double temper, 2 hours plus 2 hours, at temperatures above 950°F (510°C). This will produce hardness of less than 58 HRC.

To minimize internal stresses in cross sections greater than 6 inches (152.4 mm) and to improve stability in tools that will be EDM’d after heat treatment, soaking times of 4 to 6 hours at the tempering temperature below 950°F (510°C) are strongly recommended.

એનીલિંગ:Annealing must be performed after hot working and before re-hardening. Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1600-1650°F (871-899°C), and hold at temperature for 1 hour per inch (25.4mm) of maximum thickness; 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding 50°F per hour (28°C per hour) to 1000°F (538°C). Continue cooling to ambient temperature in the furnace or in air. The resultant hardness should be a maximum of 255 HBW.