Rock Drilling Teeth

Rock Drilling Teeth

The pick is made of carbide + 42CrMo,the hardness of carbide reachs about HRA 88. Cutting carbide head: tungsten cobalt alloy The cutting carbide is made of tungsten carbide and cobalt. Tungsten carbide is one of the hardest metals and is brittle at the same time; when it is synthesized with...

Product Details

The pick is made of carbide + 42CrMo,the hardness of carbide reachs about HRA 88.

Cutting carbide head: tungsten cobalt alloy

The cutting carbide is made of tungsten carbide and cobalt. Tungsten carbide is one of the hardest metals and is brittle at the same time; when it is synthesized with soft cobalt, an alloy with high hardness and wear resistance is formed, which can withstand super impact load. The product is designed to ensure both wear resistance and rigidity.

Commonly used components of cemented carbide

Commonly used cemented carbide is mainly composed of WC.

Tungsten cobalt (WC+Co) cemented carbide (YG)

The main components are tungsten carbide (WC) and binder cobalt (Co).

The brand is composed of "YG" ("hard, cobalt" Chinese phonetic initials) and the percentage of the average cobalt content.

For example, YG8 shows an average WCo = 8%, and tungsten carbide cobalt carbide is the other tungsten carbide. It is composed of WC and Co. It has high flexural strength, good thermal conductivity, but poor heat resistance and wear resistance. It is mainly used for processing cast iron and non-ferrous metals. Fine grained YG cemented carbides (such as YG3X and YG6X) have higher hardness and wear resistance than YG3 and YG6, but lower strength and toughness at the same cobalt content.


Summary of sectional heat treatment of pick bank body

Commonly used pick materials and heat treatment process

42CrMo is the conventional heat treatment process for the cutter body of the material: 840 degree oil quenching, +360400 tempering.

35CrMnSi is the conventional heat treatment process for the cutter body of the material: 880 degree oil quenching, +380430 tempering.

Conditional manufacturers can also adopt 880 C heating insulation + 280320 C isothermal quenching, and then air cooling heat treatment process. The Si Mn Mo series meta bainitic steel is made by normalizing + tempering heat treatment at 880 degrees C. The Quasi-Bainite structure composed of bainite, ferrite and retained austenite can be obtained after heat treatment, which has good strength-toughness matching and high wear resistance.

Carbide pick tungsten coated.png

Comparison of wear resistant layer between ordinary wear resistant layer and plasma hot compress welding

Wear-resistant pick is the pick with wear-resistant layer. Hard rock pick and superhard rock pick are used for hard rock pick. Sandstone pick is the pick with alloy strip. Spark-free pick uses plasma laser technology to weld a layer of alloy wear-resistant layer on the pick. This is most suitable for gas mines.


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