Manufacturing method of bimetal electroslag founding antiwear hopper teeth set

Abstract

An electroslag casting technology for manufacturing antiwear bimetal teeth of bucket, which is composed of tooth handle and tooth tip, features that a symmetrical water cooled multi-layer crystallizer is attached to the working surface of tooth handle, high-Cr cast iron is used as consumble electrode of electroslag casting to form multiple tooth tips at the same time, the low-carbon alloy steel or Mn steel is melted to form a bucket tooth cluster, and it is then cut with a conductive cutting apparatus to obtain individual teeth. Its advantages are high antiwear and anti-impact performance, high bending strength, high productivity and high utilization rate of raw material.

Description

technical field [0001] The invention relates to a method for manufacturing anti-wear bucket teeth by electroslag melting, in particular to a method for manufacturing groups of bimetallic electroslag casting anti-wear bucket teeth. Background technique [0002] As we all know, the construction of mining, railway, highway, water conservancy, wharf and other projects is inseparable from shovel and digging machinery, and bucket teeth are the main vulnerable parts of shovel and digging machinery. For example, when digging hard ore and rock, the bucket teeth used by excavators are generally replaced within 7 days due to wear and tear, and the consumption is huge. [0003] The third-generation anti-wear material, high-chromium cast iron, has good anti-wear performance but low impact toughness. It cannot meet the anti-fatigue requirements of the bucket tooth working section for wear resistance and the roots for impact loads and bending loads. Therefore, at present, bucket teeth are...

AI Technical Summary

Problems solved by technology

For example, when digging hard ore and rock, the bucket teeth used by the excavator are generally replaced due to wear and tear in 7 days, and the consumption is huge

[0003] The third-generation anti-wear material, high-chromium cast iron, has good anti-wear performance but low impact toughness. It cannot meet the anti-fatigue requirements of the bucket tooth working section for wear resistance and the roots for impact loads and bending loads.

In recent years, bucket teeth with high-chromium cast iron embedded in high-manganese steel have appeared. Although the performance is better than that of single-material bucket teeth, there are many influencing factors in production, and the quality is difficult to control. The lack of limit, its wear resistance is also lower than the electroslag casting bucket teeth

[0004] Before this invention, there was a Chinese patent of "electroslag casting bimetallic electric shovel bucket teeth and technology", the application number is 88105135.7, the invention uses high chromium cast iron as tooth tip, low carbon alloy steel as tooth handle, and electric The slag casting method makes the two fused into bucket teeth, and the service life is more than three times longer than that of the integrally cast high-manganese steel bucket teeth. It happened to be the initial stage of arcing, the quality was unstable, and the machining allowance was large, so it could not be transformed into commercial production. However, this invention can clearly prove that the service life of electroslag casting bimetallic bucket teeth is much better than that of single-material integral casting buckets. tooth

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