Super wear-resistant antiwear fixed sleeve of sand-making rolling-compaction port of conical sand-making machine and forming method thereof

Abstract

The invention relates to a super wear-resistant antiwear fixed sleeve of a sand-making rolling-compaction port of a conical sand-making machine and a forming method thereof. The sand-making rolling-compaction port of the conical sand-making machine is composed of a high-chromium cast iron antiwear movable sleeve sand-making rolling-compaction wall and a high-chromium cast iron antiwear fixed sleeve sand-making rolling-compaction wall, and the hardness of the high-chromium cast iron antiwear fixed sleeve sand-making rolling-compaction wall is higher than that of high-chromium cast iron at the lower part of the port edge of the sand-making rolling-compaction port. The advantages are that: 1, the problems that because the hardness of a sand-making port composed of an antiwear movable sleeve and an antiwear fixed sleeve in a conventional conical sand-making machine is the same as the hardness of the antiwear movable sleeve and the antiwear fixed sleeve, the closure gap is firstly worn to form a groove during a sand making process, as a result, the service life of the whole antiwear movable sleeve and the whole antiwear fixed sleeve is greatly shortened, and the sand-making cost cannot be reduced, are fundamentally solved; and 2, with adopting of high-frequency vibration casting of the antiwear movable sleeve and the antiwear fixed sleeve, gas and impurities in a liquid metal can be effectively discharged, moreover, metallographic structure distribution of the high-chromium cast iron is more reasonable, the compactness is higher, and the wear resistance and the impact resistance are higher.

Description

technical field [0001] The invention relates to a kind of sand-making mouth (longkou) which can fundamentally solve the sand-making mouth (longkou) formed by the high-chromium cast iron anti-wear set sand-making rolling wall existing in the cone sand making machine. Abrasion causes the wall of the dragon mouth to be ground into grooves by sand and stones, which in turn shortens the service life of the entire high-chromium cast iron anti-wear set. It belongs to the manufacturing field of cone sand making machine parts assembly. Background technique [0002] 1. CN102352431A, titled "Quasi-differential temperature heat treatment of large high-chromium cast iron rolls", uses a high-temperature gas furnace to perform quasi-differential temperature heat treatment on large high-chromium cast iron rolls, including the following steps, A. Use double-layer sleepers to erect the rolls on On the trolley of the high-temperature gas furnace, the lower roll surface of the roll is 800-900m...

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Problems solved by technology

[0004] The disadvantages of the above-mentioned background technology: First, it is not suitable for the heat treatment of the anti-wear moving sleeve and the anti-wear fixed sleeve in the cone sand making machine; second, the matching of the technical parameters of the heat treatment process cannot effectively improve the local hardness

[0005] 3. In the existing cone sand making machine, the anti-wear moving sleeve (broken wall) and the anti-wear fixed sleeve (rolling mortar wall) constitute the sand making mouth (longkou). The hardness of the wall is the same from top to bottom, so the wall of the sand making mouth (longkou wall) is first worn out and grooves are formed during the sand making (sand grinding) process (see attached Figure 5 ), which in turn leads to a significant shortening of the service life of the entire anti-wear moving sleeve and anti-wear fixed sleeve, and the cost of sand making remains high

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