The rotary groove cut-off teeth are mainly designed for hard rock. 1. Special design is adopted for the shape, in order to prolong the service life and not to produce deflective grinding in use, the tooth head is designed into a rotary groove shape to increase the rotation function in the process of use, to achieve the effect of uniform wear around the alloy and the tooth head, and to improve the service life. 2. ≥3、The weight of the alloy head is obviously larger than the general cut-off teeth, which enhances the impact strength of the alloy, and the larger the alloy, the more durable it is. 4、The alloy is made of super coarse grain grade, which enhances the heat dissipation performance of the alloy head, and also has high toughness on the basis of high wear resistance. 5、In order to ensure the welding strength and shear strength of the alloy head, the industry advanced Interceptor brazing heat treatment line equipment, all use imported flux, solder. Specific technical requirements are

　　1, appearance quality: tooth body appearance surface is smooth and smooth, no cracks, folds, dents and other defects visible to the naked eye, the tooth body surface to take anti-rust measures.

　　2, surface hardness: tooth body after heat treatment, tooth body head surface hardness ≥ 40HRC, tooth body shank surface hardness 38-42HRC

　　3, impact toughness: tooth body after heat treatment impact toughness ≥ 49J/cm²

　　4, brazing seam shear strength: tooth body and carbide brazing seam shear strength ≥ 180MPa

　　5, welding seam fullness: welding seam filled with solder not less than 80%; 6, cladding layer hardness: cladding layer hardness ≥ 60HRC

　　7、Crack check: the weld area and the welding material and the base material bonding surface shall not have cracks, carbide head shall not have cracks.