Chemical composition of LD Steel LD module LD round bar LD plate

  Supply LD die steel | LD steel plate round bar wholesale and retail LD steel is a cold working die steel of matrix steel type, which has high strength, toughness, wear resistance and high bending strength,
The cold and hot processing technology is excellent, the heat treatment distortion is small, and the versatility is strong
　
LD steel has better properties than Cr12 high carbon and high speed steel 6mo5cr4v2
It has higher strength and toughness and better wear resistance
Its application is becoming more and more common

It can be used to manufacture bolt cold upsetting trimming die, cold upsetting light punching die, automobile spring punching die, bicycle middle shaft cold extrusion die
More than ten kinds of dies, such as silicon steel sheet die, have a longer service life than the original steel (Cr12MoV, W18Cr4V
W6Mo5Cr4V2, Cr12, GCr15 and 9SiCr) have been doubled or even more than ten times

Chemical composition of LD Steel:

C

Mn

Mo

P

0 70～0 80

& le; 0 50

2 00～2 50

& le; 0 030

Heat treatment specification of LD Steel: Annealing: a general annealing heating temperature is 860 ℃ , Heat preservation for 2h, cool slowly with the furnace and anneal hard The temperature is 210 ~ 270hbw; 　　 Quenching: the conventional quenching temperature is 1100 ~ 1150 ℃, hot oil quenching or step quenching, and the hardness is 63 ~ 64hrc, the microstructure is fine acicular martensite + residual austenite + residual carbide