Wolfram carbine particle iron based composite material produced with tungsten filament in situ and method of producing the same
A technology of iron-based composite materials and tungsten carbide particles, which is applied in the field of wear-resistant parts
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0024] In-situ generation of tungsten wire with 3 layers of tungsten carbide particles reinforced gray cast iron matrix (with a carbon equivalent of 3.5%) composite material
[0025] Step 1: Superimpose 3 layers of tungsten wire mesh, press it tightly, and place it on the bottom of the graphite crucible (4), then place the graphite crucible (4) in a resistance furnace to preheat to 400°C. Such as figure 1 shown.
[0026] Step 2: pour the gray cast iron into the graphite crucible (4) at 1280°C (when the carbon equivalent is 3.5%, the melting point is about 1220°C), and then keep it warm in a resistance furnace at 1150°C for 6 minutes, Then cool down to 800°C at a rate of 15°C / min, take it out and cool it down to room temperature naturally.
[0027] The third step: take it out from the graphite crucible (4) to obtain the composite material, the composite layer is a cluster of tungsten carbide (1) particles evenly embedded in the matrix (3), as figure 2 shown.
[0028] The ...
Embodiment 2
[0030] Other conditions are the same as in Example 1. After being kept warm in the resistance furnace at 1147°C for 6min in the second step, the temperature is lowered to 800°C at a rate of 15°C / min, and when it is taken out and naturally cooled to room temperature, its tungsten carbide (1) The generation rate R is: 16.13%. (Theoretical explanation is as follows: when the temperature drops to 1147°C, due to the large degree of undercooling, graphite eutectic and cementite eutectic appear at the same time, resulting in the reduction of the formed graphite phase, thereby reducing the amount of tungsten carbide produced).
Embodiment 3
[0032] Other conditions are the same as in Example 1. After being kept warm in the resistance furnace at 1153°C for 6min in the second step, the temperature is lowered to 800°C at a rate of 15°C / min, and when it is taken out and naturally cooled to room temperature, its tungsten carbide (1) The spawn rate R is: 18.10%. (Theoretical explanation is as follows: when the temperature reaches 1153, the graphite eutectic begins to form, that is, there are not many graphite phases formed; moreover, the reaction between iron and tungsten is intensified, which reduces the amount of tungsten carbide produced)).
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More