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A high wear-resistant and heat-resistant casting for grate cooler grate plate and its casting process

A technology of heat resistance and casting process, which is applied in the field of castings with high wear resistance and heat resistance for grate coolers and grate plates and their casting processes, can solve the problems of difficult to guarantee casting defects, low dimensional accuracy and high scrap rate, and achieve the appearance of The effect of good quality, accurate size and long service life

Active Publication Date: 2021-04-09
ANHUI CONCH KAWASAKI EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional steel casting sand casting process is divided into resin sand molding and green sand molding. The advantages of resin sand molding process are high sand strength, good surface stability of sand mold, low probability of casting defects such as trachoma and sand inclusion, but the cost is relatively Higher; the main advantages of the green sand molding process are its low cost and high efficiency, which meet the requirements of high efficiency and low cost for automatic molding. However, because the molding sand uses bentonite and starch as bonding materials, even under high-pressure molding conditions , it is still difficult to ensure that there will be no casting defects caused by sand mold strength, surface stability and other reasons when producing steel castings
In addition, ordinary sand casting products are usually formed directly through the main mold and sand mold, and the dimensional accuracy will be relatively low. When producing products with high precision and high appearance quality requirements, the scrap rate is often too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A casting with high wear resistance and heat resistance for the grate plate of a grate cooler, which contains chemical element components and mass percentages as follows: C: 2.3%, Si: 0.6%, Mn: 0.5%, P: ≤0.01%, S : ≤0.01%, Cr: 23%, Ni: 0.2%, Mo: 0.2%, Cu: 0.1%, Ti: 0.2%, Y: 0.15%, the balance is Fe and unavoidable impurities.

[0029] According to the percentage by weight of each chemical component in the raw material of this embodiment, casting method comprises the following steps:

[0030] S1. Weigh C, Si, Mn, Cr, Ni, Mo, Cu and Fe according to the weight percentage of the raw materials, melt and blend the raw materials to obtain molten iron, and place Y iron alloy and Ti iron on the bottom of the ladle before tapping In the reaction tank, the molten iron is flushed to complete the reaction; after tapping, the molten iron is blown with argon during the sedation process;

[0031] S2. Prepare the mold for casting, use the automatic static pressure molding line to creat...

Embodiment 2

[0036] A casting with high wear resistance and heat resistance for the grate plate of a grate cooler, which contains chemical element components and mass percentages as follows: C: 2.55%, Si: 0.9%, Mn: 1.0%, P: ≤ 0.03%, S : ≤0.02%, Cr: 25.5%, Ni: 0.45%, Mo: 0.35%, Cu: 0.3%, Ti: 0.3%, Y: 0.2%, and the balance is Fe and unavoidable impurities.

[0037] According to the percentage by weight of each chemical component in the raw material of this embodiment, casting method comprises the following steps:

[0038] S1. Weigh C, Si, Mn, Cr, Ni, Mo, Cu and Fe according to the weight percentage of the raw materials, melt and blend the raw materials to obtain molten iron, and place Y iron alloy and Ti iron on the bottom of the ladle before tapping In the reaction tank, the molten iron is flushed to complete the reaction; after tapping, the molten iron is blown with argon during the sedation process;

[0039] S2. Prepare the mold for casting, use the automatic static pressure molding line...

Embodiment 3

[0044] A casting with high wear resistance and heat resistance for the grate plate of a grate cooler, which contains chemical element components and mass percentages as follows: C: 2.8%, Si: 1.2%, Mn: 1.5%, P: ≤0.06%, S : ≤0.04%, Cr: 28%, Ni: 0.7%, Mo: 0.5%, Cu: 0.5%, Ti: 0.35%, Y: 0.25%, the balance is Fe and unavoidable impurities.

[0045] According to the percentage by weight of each chemical component in the raw material of this embodiment, casting method comprises the following steps:

[0046] S1. Weigh C, Si, Mn, Cr, Ni, Mo, Cu and Fe according to the weight percentage of the raw materials, melt and blend the raw materials to obtain molten iron, and place Y iron alloy and Ti iron on the bottom of the ladle before tapping In the reaction tank, the molten iron is flushed to complete the reaction; after tapping, the molten iron is blown with argon during the sedation process;

[0047] S2. Prepare the mold for casting, use the automatic static pressure molding line to crea...

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Abstract

The invention discloses a high wear-resistant and heat-resistant casting for a grate cooler grate plate and its casting process, and relates to the technical field of heat-resistant alloy materials. The chemical element composition and mass percentage contained in the casting are as follows: C: 2.3~ 2.8%, Si: 0.6-1.2%, Mn: 0.5-1.5%, P: ≤0.06%, S: ≤0.04%, Cr: 23-28%, Ni: 0.2-0.7%, Mo: 0.2-0.5%, Cu: 0.1-0.5%, Ti: 0.2-0.5%, Y: 0.1-0.3%, and the balance is Fe and unavoidable impurities. The casting process of the casting includes: process design, core making, molding, melting and pouring, sand falling and cleaning, heat treatment and grinding treatment. The high wear-resistant and heat-resistant casting for the grate cooler grate plate provided by the present invention and its casting process have a compact structure, good appearance quality, and no hole defects such as trachoma. The grate plate casting of the present invention has strong wear resistance under high temperature conditions. Strong antioxidant properties.

Description

technical field [0001] The invention relates to the technical field of heat-resistant alloy materials, in particular to a high wear-resistant and heat-resistant casting for grate cooler grate plates and a casting process thereof. Background technique [0002] The grate cooler is an important main equipment in the clinker firing system of a cement plant. Its main function is to cool and transport the cement clinker. At the same time, it provides hot air for the rotary kiln and calciner. Major equipment. The grate cooler mainly consists of an upper shell, a lower shell, a supporting frame, a driving longitudinal beam, a grate bed, a clinker crusher, a hydraulic system, a cooling fan, and an air cannon. Among them, the grate plate is an important part of the grate bed. The slits of the specific structure between the grate plates conduct the cooling air, and through the gaps in the high-temperature material layer, the fine particles mixed in the coarse-grained clinker are slowl...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/08B22C9/02C21D9/00
CPCB22C9/02C21D9/0068C22C37/08C22C37/10
Inventor 裴学成吴俊杨新明王雷王彪刘秀华周智勇
Owner ANHUI CONCH KAWASAKI EQUIP MFG
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