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Characteristic:It is an economical low alloy high-speed steel with good red hardness,good toughness and thermal plasticity .It is generally under soft and moderate intensity metal.
Chemical Composition: (%)
天工钢号 (Steel grade) |
C |
W |
Mo |
Cr |
V |
Mn |
Si |
P |
S |
TG4241 |
0.90-1.00 |
1.50-2.50 |
0.50-1.20 |
3.80-6.00 |
0.50-1.00 |
0.20-0.45 |
0.80-1.30 |
≤0.03 |
≤0.02 |
TG4341 |
0.83-0.93 |
3.50-4.50 |
2.50-3.50 |
3.80-4.40 |
1.20-1.80 |
0.20-0.40 |
0.70-1.00 |
≤0.03 |
≤0.02 |
UNEDR 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:¢6.5-16.0m
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℃
TG4241austenitizing temperature :1150-1180℃
Heating coefficient 10-15sec/mm ,quenching under 580-620℃, then cooling to room temperature.
Tempering:
Tempering temperature under :540-560℃,temperature 3 times, each time 1hour ,then cooling to room temperature.
Copyright:Jiangsu Tiangong Tools Co., Ltd. Address:Houxiang,Danbei Town,Danyang City,Jiangsu Province,China
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