Granulator blade with high wear resistance and sharpening method thereof
A granulator and cutting tool technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems of impossibility, loss, tool return and granulation, etc., and achieve the effect of extending the life and improving the quality of granulation
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
example 1A
[0055] Sheets made of Vanadis-10 material produced by Bohler-Uddeholm were processed to obtain figure 2 Knives of the shape shown in .
[0056] The hardness measured before and after treatment was equal to 58 and 56 Rockwell C scale hardness respectively.
[0057] The knives, kept apart, were inserted into a muffle fed with nitrogen flow. The muffle kiln was switched on and heated up to 500°C at a rate of 10°C / minute and then at 2°C for one minute to a prespecified tempering temperature equal to 620°C. The temperature was held constant for three hours, after which the muffle was switched off and the tool was left to cool slowly (at about 5°C per minute). The knives were removed when the temperature reached 400°C and left to cool in a calm atmosphere until room temperature was reached. The hardness measured after heat treatment was 44.5 Rockwell C hardness.
[0058] The knives were assembled on the hub of the granulator and sharpened under these conditions: rotation rate 1...
example 1D-1G
[0064] Example 1A was repeated with knives from the same plate but heat tempered at a different temperature. The resulting hardnesses are shown in Table 1, expressed on the Rockwell C scale. Table 2 that follows gives the granulation quality obtained and the minimum and maximum wear rates recorded in the sharpening phase and in the granulation phase.
[0065] Table 1
[0066] example
example 2
[0068] Repeat Example 1A, but during sharpening, the flow of cooling water is periodically adjusted so that at full flow (850 l / h) and an estimated spray velocity of 16 m / s, the period is alternately equal to 30 seconds and the period is 10 seconds, the water flow is reduced to 1 / 8 of the previous value during the period equal to 10 seconds. The duration of sharpening is equal to 60 minutes.
PUM
| Property | Measurement | Unit |
|---|---|---|
| hardness | aaaaa | aaaaa |
| hardness | aaaaa | aaaaa |
| hardness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More