Usage :TGM2 is suitable for produce in high quality cutting tools,such as hob,knife,and milling cutter.TGM2A is suitable for produce in common cutting tools with high toughness,also suitable for cold-forming tools.M2 is suitable for produce common tools.

Characteristic :It is typical steel grade of  W-Mo current hss, with high toughness,good thermal plasticity,high hardness,as well as red gardness and hot hardness.

Similar steel grade

 

标准	GB	JIS	ASTM	DIN	Bohler	ERASTEEL
钢号	W6Mo5Cr4V2	SKH51	M2	S6-5-2 1.3343	S600	EM2

 

Composition :(％)    

  

 

UNDER ANNEALED CONDITION

Hardness :HB205-255

Delivery status :

As Cold drawn/ Hot rolled/ forged,in annealed condition.

Size :

Cold drawn bar :￠2.2-14.2mm

Hot rolled bar :￠8.0-80.0mm

Forged bar :￠81.0-250.0mm

Coil :￠6.5-16.0mm

Heat Treatment :

Annealing:

Annealing temperature:860-880℃,keep this temperature by 2-4 hours,then cooling to 600℃ in the speed of 20-30℃/h

if after cold drawn precess,suggest add stress relieving annealing process

Under the temperature of 600-700℃ ,keep this temperature by 2 houres.

Quenching & Tempering (salt bath)

Quenching:

Pre-heating in two steps:

Heating temperature under:400-500℃ and 850-900℃

Austenitizing temperature:1185-1225℃

Heating coefficient 10-15sec/mm,quenching under 580-620℃,then cooling to room temperature.

Quenching temperature difference in 5-10℃ between TGM2, TGM2A; TGM2A's quenching temperature is higher than TGM2

Tempering:

Tempering temperature under:540-560℃ ,tempering 3 times,each time 1 hour,then cooling to room temperature.