Pressure-free sintering preparation method of diamond string bead

Abstract

The invention discloses a pressure-free sintering preparation method of a diamond string bead. The method comprises the following steps: a, adding welding powder with melting temperature similar to sintering temperature of a diamond string bead matrix to form a mixed material with the welding powder; b, pelletizing the mixed material to obtain pelletizing powder; c, carrying out ring pressing treatment on the pelletizing powder to obtain a pressed ring; d, carrying out pressure-free sintering treatment on the pressed ring and melting the welding powder while sintering to form a self-welded and integrated diamond string bead; and e, carrying out surface treatment on the diamond string bead to obtain a formed diamond string bead. Through the method, the integration of sintering and self-welding is implemented; the welding process in the conventional pressure-free sintering preparation process of the string bead is eliminated; the adhesion effect between the string bead matrix and a substrate is ensured; the production efficiency of the method is greatly improved; the production cost is reduced; the condition for further popularizing the pressure-free sintering preparation method of the string bead is created.

Description

technical field [0001] The invention relates to the field of diamond bead preparation technology, in particular to a self-welding pressureless sintering bead preparation method. Background technique [0002] In the diamond bead preparation process, the current commonly used processes mainly include two types: [0003] One is hot-press sintering beads preparation process, because hot-press sintering belongs to pressurized, fast and small-batch sintering, it has three problems that are difficult to solve. ① It is difficult to control the stability of product quality; Long, also need to carry out reaming, tapping, degreasing etc. after bead sintering as finished; 3. be difficult to satisfy the production demand of small-diameter bead (especially group saw bead). [0004] The other is the pressureless sintering bead preparation process, which is basically based on the pressureless sintering process in the production of sawing beads. Since pressureless sintering belongs to pres...

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Problems solved by technology

[0005] The invention provides a pressureless sintering preparation method of diamond beads to solve the problem that the welding process of the existing pressureless sintering bead preparation technology restricts the development of the process. During welding, the welding ring is difficult to mechanize and assemble, and manual participation and secondary furnace are required. Not only the production efficiency is low, but also the technical problem of high production cost

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