TG W431W4241 High Speed Steel

Usage:It is mainly used to produce drill, tap, saw bit and high efficiency wood tool.

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)

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.

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