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Fracture-free high-chromium cast iron crusher hammer

A technology of high chromium cast iron and crusher, applied in the direction of casting mold, casting mold composition, casting molding equipment, etc., can solve the problems of insufficient impact force, harsh production environment, low production efficiency, etc., and achieve the ability to increase the impact load , Solve the effect of harsh production environment and stable and reliable quality

Inactive Publication Date: 2012-03-07
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the characteristics of the above-mentioned materials, there are some problems in the use process: although the high-chromium cast iron hammer head has high hardness and good wear resistance, its toughness is poor, especially the large and medium-sized hammer heads are easily crushed under the impact of crushing. Fracture occurs; although the high manganese steel hammer head has high toughness and hardening ability under high impact force, when the hammer head is working, its impact force is not strong enough to play the characteristics of impact hardening, resulting in fast wear and short service life; Therefore, the hammer head that above-mentioned two kinds of materials are made all is restricted in use
This method not only has complex manufacturing process and low production efficiency, but also has a very harsh production environment.

Method used

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  • Fracture-free high-chromium cast iron crusher hammer
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  • Fracture-free high-chromium cast iron crusher hammer

Examples

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Effect test

example 1

[0016] Example 1: Production of hammerheads with a single weight of 200N, all of which are cast with high-chromium cast iron. The mass fractions of chemical components of high-chromium cast iron are: C 2.61%, Si 0.72%, S 0.031%, P 0.06%, Mn 0.69%, Cu 0.82%, Cr 15.3%, Mo 1.3%, V 0.10%, Ti 0.12%, B 0.082%, RE 0.092%, Mg 0.004%, Fe 78.071%.

[0017] In the hammer head of the present invention, an Ω-shaped round steel frame is placed at the center of the hammer head, and the diameter of the round steel is 10mm. In order to ensure that the round steel frame does not shift when the lost foam is gasified during the pouring process, the height of the round steel frame in the height direction Both ends are more than 15mm longer than the lost foam, see figure 1 ; The round steel frame can prevent the hammer head from breaking due to excessive impact load when it is working. The principle is the same as that of steel bars placed in concrete, which greatly increases the tensile stress.

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example 2

[0019] Example 2: Production of a hammer head with a unit weight of 400N, which is cast from high-chromium cast iron. The mass fractions of chemical components of high-chromium cast iron are: C 2.82%, Si 0.85%, S 0.030%, P 0.07%, Mn 0.77% , Cu 0.96%, Cr 19.50%, Mo 1.45%, V 0.12%, Ti 0.15%, B 0.091%, RE 0.11%, Mg 0.0045%, Fe 73.0745%.

[0020] In the hammer head of the present invention, an omega-shaped round steel framework is placed at the center of the hammer head, and the diameter of the round steel is 15mm. In order to ensure that the round steel framework does not shift when the lost foam is gasified during the pouring process, the height of the round steel framework in the height direction Both ends are more than 20mm longer than the lost foam, see figure 2 ; The round steel frame can prevent the hammer head from breaking due to excessive impact load when it is working. The principle is the same as that of steel bars placed in concrete, which greatly increases the tensi...

example 3

[0022] Example 3: Production of a hammer head with a unit weight of 600N, which is cast from high-chromium cast iron. The mass fractions of chemical components of high-chromium cast iron are: C 2.93%, Si 0.95%, S 0.029%, P 0.06%, Mn 0.91% , Cu 1.12%, Cr 25.4%, Mo 1.72%, V 0.14%, Ti 0.18%, B 0.11%, RE 0.13%, Mg 0.005%, Fe 66.316%.

[0023] In the hammer head of the present invention, an Ω-shaped round steel framework is placed at the center of the hammer head, and the diameter of the round steel is 20mm. In order to ensure that the round steel framework does not shift when the lost foam is gasified during the pouring process, the height of the round steel framework in the height direction Both ends are more than 25mm longer than the lost foam, see image 3 ; The round steel frame can prevent the hammer head from breaking due to excessive impact load when it is working. The principle is the same as that of steel bars placed in concrete, which greatly increases the tensile stress...

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Abstract

The invention discloses a fracture-free high-chromium cast iron crusher hammerhead and a manufacturing method thereof. The hammerhead is completely cast by adopting high-chromium cast iron lost foam; and the high-chromium cast iron has the following chemical compositions in percentage by mass: 2.60 to 3.2 percent of C, 0.5 to 1.0 percent of Si, less than 0.06 percent of S, less than 0.07 percent of P, 0.5 to 1.0 percent of Mn, 0.8 to 1.2 percent of Cu, 15.0 to 27.0 percent of Cr, 1.2 to 1.8 percent of Mo, 0.10 to 0.20 percent of V, 0.15 to 0.25 percent of Ti, 0.08 to 0.12 percent of B, 0.08 to 0.15 percent of RE, 0.004 to 0.007 percent of Mg, and 63.943 to 78.986 percent of Fe. The high-chromium cast iron material has good obdurability; and the hammerhead is provided with a round steel framework, has high hardness and good wear resistance, and cannot fracture in the using process.

Description

technical field [0001] The invention relates to a hammer head of a crusher, in particular to a non-fracturing high chromium cast iron hammer head of a crusher and a manufacturing method thereof. Background technique [0002] For a long time, materials such as high chromium cast iron and high manganese steel have been widely used in the crushing machinery industry to manufacture various types of hammer crusher hammer heads. However, due to the characteristics of the above-mentioned materials, there are some problems in the use process: although the high-chromium cast iron hammer head has high hardness and good wear resistance, its toughness is poor, especially the large and medium-sized hammer heads are easily crushed under the impact of crushing. Fracture occurs; although the high manganese steel hammer head has high toughness and hardening ability under high impact force, when the hammer head is working, its impact force is not strong enough to play the characteristics of i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C13/26C22C37/10B02C13/28C22C33/08B22D1/00B22C9/04
Inventor 卓荣明卜云峰
Owner HUAIYIN INSTITUTE OF TECHNOLOGY