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THERMASHEAR
AWS Specification: NONE
JIS Specification:

NONE

Other Specification:

I. APPLICATIONS:

Due to its high hardness, toughness and heat resistance, THERMASHEAR is ideally suited for buildups on parts subjected to severe friction, compression and moderate impact loads at elevated temperatures such as shearing blade, gripping pliers, gliding and guiding surfaces, hot and cold punching tools, valves, extrusion press pistons, forging tools, trimming tools, and hot cutting tools. THERMASHEAR is used to good advantage for the production of new cold and hot working tools. In such cases a base material with an accordingly high tensile strength has to be used.

II. DESCRIPTIONS:


Basic-coated electrode for wear resistant

Surfacings on hot and cold working tools

The electrode has excellent welding properties, a stable and regular flow, good bead appearance and

very easy slag removal.

III. NOTES ON USAGE:

PREHEAT THE WORKPIECE the recommend preheat temperature for the different type of tool steel. Hold electrode as vertically as possible and with a short arc. Allow the workpiece to cool slowly. Finishing by grinding. Re-dry electrodes that have got damp for 2h/300° C.

IV. TYPICAL CHEMICAL COMPOSITION OF WELD METAL:

Cr-Mo-Mn-Si

V. HARDNESS OF WELD METAL: appx. 55 HRC / Heat resistant up to 550°C

V. HEAT TREATMENT:

ANNEAL:
hold at 780 – 800° C (1400 – 1470° F).
for 2 hours
cool down slowly in furnace, not exceeding
32° C (90° F) per hour.

Text Box: Shearing Blade
Hardening:
Preheat to 1000 – 1500° C (1830 – 1920° F).
quench in oil or in warm salt-bath at 400° C (750° F).
Tempering temperature:
500 - 530° C (930 – 1010° F).

VI. WELDING POSITIONS: FLAT, FILLET, VERTICAL UP, HORIZONTAL, OVERHEADD

VII. SIZES AVAILABLE AND RECOMMENDED CURRENTS (AC or DC+ ):

Size

Dia.

3.2

4.0

5.0

(mm)

Length

350

350

350

Current Range

80-110

100-140

130-170

Tool steel welding demonstrating, the tremendous versatility of THERMASHEAR electrode. Deposits are extra tough, heat resistant for parts subject to impact, compression and wear.
 

Description and Type of Tool Steel

AISI/SAE Designation

Working Hardness

Preheat and Interpass Temperature

PROCEDURE: VERY IMPORTANT

Cutting edges should be undercut to allow deposition of a min. of three layer

Build-up of cutting edge on cold trimmer. High carbon- high chromium steel

D 2

(JIS SKD11)

58 – 60

430 – 480° C

(800 – 900° F)

Preheat. After welding allow part to cool to approx. 90° C (200°F) reheat to 430°C (800°F) then cool in still air

Cutting edge re-built on blanking die Cold work die steel (Blanking material SAE 1085 3/16” thick)

A 2

58 – 60

150 – 260° C (310 – 500° F)

Preheat. After welding allow part to cool to approx. 50° C (125°F) reheat to 230°C (450°F). then cool in still air.

Re-built corners on punches. Oil hardening steel

01

58 – 60

180 – 200° C

(350 – 400° F)

Preheat. After welding allow part to cool to approx. 50° C (125°F) reheat to 200°C (450°F). then cool in still air.

Re-built cutting edges on cold shear blade. Shock resisting alloy tool steel (cutting 5” round bars)

S 1

54 – 55

260 – 290° C (500 – 550° F)

Preheat slowly and uniformly. After welding, retard cooling by covering welded parts in slightly heated mica, lime or sand.

Re-built trimming edge on progressive die. Water hardening steel

W 2

58 – 60

230 – 260° C (450 – 500° F)

Preheat. After welding allow part to cool to approx. 50° C (125°F) reheat to 230°C (450°F). then cool in still air.

Re-built trimming edge on hot-trimmer die. Hot work steel.

H 21

52 – 53

430 – 480° C (800 – 900° F)

Preheat. After welding, retard cooling by covering welded parts in slightly heated mica, lime or sand

Build-up of cutting edge. Slab shear blade. Medium carbon steel.

1040

54 – 56

230 – 260° C (450 – 500° F)

Preheat evenly. After welding, retard cooling by covering welded parts in slightly heated mica, lime or sand.

Weld deposits of THERMASHEAR have a hardness of 58 – 60 RC. “as welded” when allowed to cool in still air. For given conditions lower hardness readings and tougher deposits are obtained by delaying the rate of cooling. In actual fact, this procedure results in refining the grain structure and in reduction of stresses.

DEFINITION:
Preheat temperature: The temperature that the base metal must attain immediately before welding or depositing the weld metal.
Interpass temperature: The temperature that the base metal and deposited weld metal be maintained or hold in between welding operation or passes.
Retard cooling: slow cooling.

 

TEST RESULT

The information contained or otherwise referenced herein is presented only as “typical” without guarantee or warranty, and Industrial Welding Corporation expressly disclaims any liability incurred from any reliance thereon. Typical data and Test results for mechanical properties, deposit or electrode composition and other properties were obtained from a weld produced and tested according to prescribed standards, and should not be assumed to be the expected results in a particular application or weldment. Actual results will vary depending on many factors, including, but not limited to, weld procedure, plate chemistry and temperature, weldment design and fabrication methods. Users are cautioned to confirm by qualification testing, or other appropriate means, the suitability of any welding consumable and procedure before use in the intended application.