Impact crusher consumable materials research
Monday, March 24, 2008 in impact crusher,crusher parts
Key state construction projects Wuqiangxi hydropower projects from Austria to introduce a new type of crusher - Connaught, Chong APK40-impact crusher. With a full set of seven pieces of wearable eight varieties are used antiwear materials. VAI from imported products priced at 25,000 yuan / t, only a crusher, it is necessary to the completion of the project will cost 25.0535 million yuan. In order to enable the introduction of equipment accessories based on domestic, we wear-resistant parts for the aircraft, has repeatedly carried out research and Preparation. After running production test, developed by the production of wear-resistant alloy parts and imported products is life, and can fully replace imported parts.
L crusher vulnerability of the working conditions and material selection
1.1 working conditions
Wuqiangxi hydropower project in a sandstone made of quartzite and quartz aggregate, and then the concrete preparation. These two gravel compound SIO. Content of 75% -90%, Mok's hardness of 7 above, compressive strength of 200-300 MPa. The introduction of technical parameters for the crusher: rotor diameter of 1000 × 1000 mm width, speed 740 r / min, 160 kw power, the largest feed grain size of 150 mm, breaking capacity of 120 t / h. Random equipment brought in by the scene of the vulnerability assessment product, service life of 110 - 125 h. Vulnerability in the accessories in the operation of another condition characterized by: high-speed operation of the hammer and high hardness of quartzite repeated collisions, Hammer work surface temperatures as high as 500-600 ℃, therefore, wear-resistant materials must be higher Temperatures have sufficient toughness and hardness.
1.2 wear mechanism
Connaught-impact crusher in the hammer to counter the plate, and other consumable parts wear cut-cutting is abrasive wear. This is the wear surface strain and mechanical wear a trench stronger strain, is due to the formation of grooves in forcing abrasive, a certain rate cut metal matrix people, and after a period after sliding from the metal substrate, which in the matrix. Road left a trench. Groove depend on the formation of local stress and the size of abrasive metal surface hardness and the relative value. Stress in the same circumstances, abrasive hardness greater, the more prone to trench. As sand Shuo-hardness, and therefore the metal matrix wear trench often hold a major position.
1.3 Material Selection
In order to learn from foreign experience, first of all, we VAI imported products remnants of the microstructure, mechanical properties and chemical composition of the test results showed that the imports of parts used in wear-resistant materials for high-alloy materials, the chemical composition table 1, the martensitic microstructure for a massive increase of secondary carbide and carbide hardness of HRC62 ~ 64. We used both at home and abroad on the use of wear-resistant materials for a wide range of research and analysis in kind, and on this basis, under the impact crusher Principle and the work of domestic resources to carry out a large number of materials testing, selection of high-chromium alloy CYK-iron to carry out Preparation.
L crusher vulnerability of the working conditions and material selection
1.1 working conditions
Wuqiangxi hydropower project in a sandstone made of quartzite and quartz aggregate, and then the concrete preparation. These two gravel compound SIO. Content of 75% -90%, Mok's hardness of 7 above, compressive strength of 200-300 MPa. The introduction of technical parameters for the crusher: rotor diameter of 1000 × 1000 mm width, speed 740 r / min, 160 kw power, the largest feed grain size of 150 mm, breaking capacity of 120 t / h. Random equipment brought in by the scene of the vulnerability assessment product, service life of 110 - 125 h. Vulnerability in the accessories in the operation of another condition characterized by: high-speed operation of the hammer and high hardness of quartzite repeated collisions, Hammer work surface temperatures as high as 500-600 ℃, therefore, wear-resistant materials must be higher Temperatures have sufficient toughness and hardness.
1.2 wear mechanism
Connaught-impact crusher in the hammer to counter the plate, and other consumable parts wear cut-cutting is abrasive wear. This is the wear surface strain and mechanical wear a trench stronger strain, is due to the formation of grooves in forcing abrasive, a certain rate cut metal matrix people, and after a period after sliding from the metal substrate, which in the matrix. Road left a trench. Groove depend on the formation of local stress and the size of abrasive metal surface hardness and the relative value. Stress in the same circumstances, abrasive hardness greater, the more prone to trench. As sand Shuo-hardness, and therefore the metal matrix wear trench often hold a major position.
1.3 Material Selection
In order to learn from foreign experience, first of all, we VAI imported products remnants of the microstructure, mechanical properties and chemical composition of the test results showed that the imports of parts used in wear-resistant materials for high-alloy materials, the chemical composition table 1, the martensitic microstructure for a massive increase of secondary carbide and carbide hardness of HRC62 ~ 64. We used both at home and abroad on the use of wear-resistant materials for a wide range of research and analysis in kind, and on this basis, under the impact crusher Principle and the work of domestic resources to carry out a large number of materials testing, selection of high-chromium alloy CYK-iron to carry out Preparation.
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