Novel hot working alloy steel for magnesium alloy melt quantitative conveying system

Abstract

The invention relates to novel hot working alloy steel for a magnesium alloy melt quantitative conveying system. The novel hot working alloy steel is characterized by consisting of the following components in percentage by weight: 0.18 to 0.30 percent of C, 0.2 to 1.0 percent of Mn, 0.3 to 1.0 percent of Si, 10.0 to 18.0 percent of Cr, 6.0 to 8.5 percent of Mo, 9.0 to 11.0 percent of Co, 3.0 to 5.0 percent of W, 0.8 to 1.5 percent of Al, 0.5 to 0.6 percent of RE, 3 to 5 ppm of N, 0.03 to 0.10 percent of P, 0.03 to 0.10 percent of S and the balance of Fe and inevitable trace impurities. Due tomicroalloying of rare earth, aluminum, nitrogen and other elements, high-temperature strength, abrasive resistance and high-temperature corrosion resistance of materials are obviously improved, the alloy can be smelted by a power frequency induction furnace in air, and the novel hot working alloy steel is used for manufacturing components and parts for the magnesium alloy melt quantitative conveying system, such as melting pot sleeves for magnesium alloy hot-room machines, pump cylinders and blades for automatic magnesium alloy pouring furnaces and the like.

Description

technical field [0001] The invention relates to a new type of hot work alloy steel for quantitative delivery system of magnesium alloy melt, which is mainly used for manufacturing components for quantitative delivery system of magnesium alloy melt Background technique [0002] In the magnesium alloy hot chamber die casting machine, the injection device (commonly known as the feeding part) is its key component and is also a vulnerable part. The part is immersed in the magnesium melt at 680-700°C for a long time, and the magnesium alloy liquid is sucked into the pressure chamber by the reciprocating movement of the hammer head in the pot and injected into the die-casting mold. The special working environment puts forward high requirements on the wear resistance, thermal stability and corrosion resistance of the material. [0003] At present, countries all over the world mainly choose a kind of hot work die steel developed in Germany that can meet the working conditions, and t...

AI Technical Summary

Problems solved by technology

However, due to the high content of alloy elements in this alloy steel, it has high requirements for melting. In foreign countries, it is high-frequency vacuum induction melting, and the melting cost of the alloy is quite high. Moreover, because the weight of the pot used in the magnesium alloy hot chamber machine is relatively large, generally Between 200-300kg (including pouring system and riser), there are few domestic vacuum melting equipment that can meet such pouring weight

At present, the domestic magnesium alloy industry is booming, and the hot-working materials for magnesium alloy quantitative liquid supply parts are currently imported; at the same time, because the above supporting parts are all consumable parts, the post-maintenance costs of related equipment manufacturers are high.