Easy cutting blade for casting riser and preparation method thereof

Abstract

The invention discloses an easy cutting blade for a casting riser and a preparation method thereof, and relates to the technical field of casting production. The easy cutting blade is prepared by the following components in percentage by weight: 25% of asbestos, 15% of resins, 15% of kaolin, 10% of sinhalite, 20% of wear resistant particles and 15% of fillers; the resins include phenolic resins, butadiene rubber and high-temperature carbon fiber resins; and the wear resistant particles include 0.5-0.8 part of antimony by weight, 8-10 parts of graphite by weight and 3-5 parts of silicon disulfide by weight. The preparation method comprises the following steps: the weighed raw materials are added with water for fully mixing to form a slimy mixture; and the mixture is molded by pressing at a normal temperature, is molded by pressing at a high temperature of 600-700 DEG C, is fired in a ceramic manner at a high temperature of 800-1200 DEG C, is quenched for 7-10 minutes in quenching oil of 90-100 DEG C after cooling, and is tempered for 6-10 hours at a temperature of 300-350 DEG C. The easy cutting blade has such advantages as good heat stability, high strength, long service life, high refractoriness, no scattering and no deformation; and a riser connecting channel is complete in shape.

Description

Technical field: [0001] The invention relates to the technical field of casting production, in particular to an easy-cut sheet for a riser of a casting and a preparation method thereof. Background technique: [0002] In the production of castings, when the connection channel between the riser and the casting body is used as the easy-cutting piece using conventional water glass sand or resin sand, under the condition of high temperature caused by friction, the strength of the existing easy-cutting piece is low, and some raw materials are produced. It is easy to be oxidized at high temperature, resulting in low service life of the friction material, not high temperature resistance, poor thermal stability, not durable, prone to deformation, looseness, collapse, pores and other faults of the easy-to-cut sheet. Cause fatal casting defects such as fleshy and oversized residual roots when removing the riser. Invention content: [0003] The technical problem to be solved by the p...

AI Technical Summary

Problems solved by technology

[0002] In the production of castings, when the connection channel between the riser and the casting body is used as the easy-cutting piece using conventional water glass sand or resin sand, under the condition of high temperature caused by friction, the strength of the existing easy-cutting piece is low, and some raw materials are produced. It is easy to be oxidized at high temperature, resulting in low service life of the friction material, not resistant to high temperature, poor thermal stability, not durable, prone to failures such as deformation, looseness, collapse, and pores of the easy-to-cut sheet

Cause fatal casting defects such as fleshy and oversized residual roots when removing the riser