Hard alloy mold material for fastener formed through cold upsetting and preparation method of hard alloy mold material

Abstract

The invention discloses a hard alloy mold material for a fastener formed through cold upsetting and a preparation method of the hard alloy mold material. The hard alloy mold material comprises 72.4%-77% of WC, 22%-25% of Co, 0.5%-0.8% of Ni, 0.3%-0.8% of Cr3C2 and 0.2%-1% of WC-TiC-NbC solid solution. The technique of the hard alloy mold material comprises the steps that WC, Co, Ni, Cr3C2 and the WC-TiC-NbC solid solution are placed in a ball mill, wet milling media, forming agents and additives are added under the matching of wet milling balls and mixtures, and ball milling is conducted; slurry obtained after wet milling is dried by means of a spray tower for granulation; dried alloy powder is subjected to press-forming and placed in a low-pressure sintering furnace for heat preservation, and a sintered alloy product is obtained after the sintering furnace is cooled to the indoor temperature; and the sintered alloy liquid nitrogen is subjected to subzero treatment, and finally, low-temperature tempering treatment is conducted. The hard alloy mold material has the advantages of being resistant to abrasion, oxidation and corrosion, high in strength, long in service life and the like.

Description

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AI Technical Summary

Benefits of technology

This patented technology helps protect against rust on steel bolts used for joining components together during use. It involves adding small amounts (less than 1%) of metal powder or other substances added onto the surface of each component before welding them together. These particles help create stronger connections between these parts without damaging their properties overtime. By doing this, they make sure there will be strong joints even when subjected to severe environments such as salt water. Additionally, the manufacture processes involved involve wet mill processing, spay drying/press casting, hot pressing, sputter coating, cooling, machining, etc., which makes producing an effective and durable product while reducing costs compared to traditional methods.

Problems solved by technology

This patents discuss different ways how well known types of metals like iron and chrome may be added to enhance durability when making products made from them due to better abrasion resistance compared to pure metal. These techniques involve improving both mechanical property and reducing damage caused by friction. Additionally, there exist various applications where harder elements called martensite were found beneficial because it provides improved impact resistance while maintaining good toughiness characteristics.

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