PRODUCT NAME :
high speed tool steel
STANDARD:
GB/T9942-1988 GB/T9943-1988 ISO4957
GRADE COMPARISION:
ULTRASONIC STANDARD:
GB/T6402-2008 / SEP921-84. ASTM A388
CHEMICAL COMPOSITION:
|
grade |
C |
Si |
Mn |
Cr |
Mo |
W |
V |
|
W9Mo3Cr4V |
0.77-0.87 |
0.20-0.40 |
0.2-0.4 |
3.8-4.4 |
2.7-3.3 |
8.50-9.50 |
1.3-1.7 |
HEAT TREATMENT SPECIFICATION & MECHANICAL PROPERTIES:
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:1190-1230℃
Heating coefficient 10-15sec/mm,quenching under 580-620℃,then cooling to room temperature.
Tempering:
Tempering temperature under:540-560℃,tempering 3 times,each time 1 hour, then cooling to room temperature.
DELIVERY CONDITION :
DIMENSION : mm
APPLIED RANGE:
It can be used to produce different kinds of too instead of W18 and M2.
Characteristic:It is current has developed in our country .Its service performance is equal to that of W18Cr4V(T1) and W6Mo5Cr4V2(M2).
REMARK：
Above listed parameters and sepcification only for reference . Specific parameters according to standard. Requirments beyond standard will be negotiate by both sides .
Delivery state:annealed, spheroidal annealed, quenched & tempered ,bright bar, cold-drawn, etc.
Listed specifications are only typical grades; products of required specifications can be developed/produced per international, Chinese or industry standards, or based
on agreements with customers.
