Crucible pretreatment device for gas atomization powder preparation

Abstract

The utility model relates to the field of vacuum induction melting gas atomization powder making, in particular to a crucible pretreatment device for gas atomization powder making. The device comprises an upper end cover, a metal frame and a lower bottom plate, and is specifically and structurally characterized in that the metal frame is formed by splicing and welding vertical bars and circular rings, more than two circular rings are vertically and coaxially arranged along the vertical direction, more than four vertical bars are uniformly arranged along the outer sides of the circular rings, and the circular rings are welded at the upper ends and the lower ends of the vertical bars; the lower bottom plate is connected with the metal frame through welding, a protrusion is arranged in the middle of the lower bottom plate, and a through hole a is formed in the center. The upper end cover is a movable part and is provided with a through hole b in the center. According to the device, the crucible outer sheath, the crucible and the flow guide pipe can be integrally assembled and baked before use, the crucible can be integrally replaced when needing to be replaced, the device can be immediately used after being replaced, the device is suitable for various production environments, and the production efficiency during continuous powder making is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of vacuum induction melting gas atomization powder making, in particular to a crucible pretreatment device for gas atomization powder making. Background Art

[0002] In the process of vacuum induction atomization powder making, the guide tube is an important component connecting the melting area and the atomization area. At present, in the process of atomization powder making, the crucible and the outer sheath of the crucible are usually replaced as a whole after the atomization is completed. After the outer crucible sheath and the atomization crucible are installed in the induction coil, the gap is filled with corundum sand to compact it, and then a mixture of quartz sand and water glass is used to fix the guide tube at the through hole at the bottom of the crucible. After the fixing is completed, the water glass is dried with a hot air gun for 15 to 20 minutes. After the overall hardening has strength, the atomization powder making ingot is loaded, the ceramic rod is fixed, the upper furnace cover is closed, the vacuum is drawn, and the smelting is started to start the powder preparation of the next furnace. In the process of continuous atomization production of alloy powder, it takes about 30 minutes to tie the crucible to fix the guide tube. This step increases the time between atomization furnaces and seriously reduces the work efficiency of continuous atomization production. Summary of the invention

[0003] The technical problem to be solved is to realize the pre-knotting treatment of the crucible and the guide tube so that the crucible can be immediately loaded into the furnace for use after the atomization is completed. The utility model provides a crucible pretreatment device for gas atomization powder making, thereby reducing the crucible and guide tube treatment time between atomization furnaces and improving the continuous production efficiency of atomization powder making. The technical solution of the utility model is:

[0004] A crucible pretreatment device for gas atomization powder making, the device comprises an upper end cover, a metal frame and a lower bottom plate, and the specific structure is as follows:

[0005] The metal frame is welded by vertical bars and circular rings. More than two circular rings are arranged up and down along the vertical coaxial line. More than four vertical bars are evenly arranged along the outside of the circular rings. The upper and lower ends of the vertical bars are welded to the circular rings. The lower bottom plate is connected to the metal frame by welding. There is a bulge in the middle part of the lower bottom plate, and there is a through hole a in the center, which is used to connect the bottom of the crucible to fix the guide tube. The upper end cover is a movable part, and a through hole b is provided in the center for placing a hot air gun for drying and heating.

[0006] The above-mentioned crucible pretreatment device for gas atomization powder making, its preferred embodiment is that the width of the vertical bars and the circular rings of the metal frame is 20-30 mm and the thickness is 2-4 mm.

[0007] The above-mentioned crucible pretreatment device for gas atomization powder making has a preferred embodiment in which the diameter of the upper end cover is 50-100 mm larger than the outer diameter of the metal frame, the thickness of the upper end cover is 2-4 mm, and the diameter of the middle through hole b is 40-60 mm.

[0008] The above-mentioned crucible pretreatment device for gas atomization powder making has a preferred embodiment in which the thickness of the lower bottom plate is 5-10 mm, the height of the middle protrusion is 10 mm, the diameter of the protrusion part is 50-60 mm, and the diameter of the through hole a is 12 mm.

[0009] The advantages and beneficial effects of the utility model are:

[0010] The utility model uses a crucible pretreatment device to knot the outer sheath of the crucible in advance, fixes the guide tube in the crucible and dries it to make it have a certain strength. After the gas atomization powder making process is completed, the crucible can be replaced and alloy ingots can be added immediately, which reduces the drying time of the knotted crucible and the guide tube after fixation between atomization furnaces by nearly 30 minutes, greatly improving the production efficiency of continuous atomization powder making. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of a crucible pretreatment device for gas atomization powder making;

[0012] Figure 2 It is a schematic diagram of the structure after the crucible outer sheath, crucible and guide tube are installed in the crucible pretreatment device for gas atomization powder making;

[0013] In the figure: 1-upper end cover; 2-metal frame; 3-lower bottom plate; 4-crucible outer jacket; 5-ceramic guide tube; 6-fine corundum sand and water glass mixture; 7-coarse corundum sand; 8-crucible; 9-hot air gun; 12-through hole b; 21-vertical bar; 22 circular ring; 31-protrusion; 32-through hole a. DETAILED DESCRIPTION

[0014] In order to better illustrate the utility model, a detailed description is given below in conjunction with the accompanying drawings. Example 1

[0015] like Figure 1 As shown, a crucible pretreatment device for gas atomization powder making includes an upper end cover 1, a metal frame 2 and a lower bottom plate 3, and the specific structure is as follows:

[0016] The metal frame 2 is welded by vertical bars 21 and circular rings 22. The four circular rings are arranged up and down along the vertical coaxial line. The four vertical bars 21 are evenly arranged along the outer side of the circular rings 22. The circular rings 22 are welded to the upper and lower ends of the vertical bars 21. The lower base plate 3 is connected to the metal frame 2 by welding. There is a protrusion 31 in the middle part of the lower base plate 2, and a through hole a32 is provided at the center. The upper end cover is a movable part 1, and a through hole b12 is provided at the center.

[0017] The width of the vertical bar 21 and the circular ring 22 of the metal frame 2 is 25 mm, and the thickness is 3 mm. The diameter of the upper end cover 1 is 75 mm larger than the outer diameter of the metal frame 2, the thickness of the upper end cover 1 is 3 mm, and the diameter of the middle through hole b12 is 50 mm. The thickness of the lower bottom plate 3 is 8 mm, the height of the middle protrusion 31 is 10 mm, the diameter of the protrusion 31 is 55 mm, and the diameter of the through hole a32 is 12 mm.

[0018] like Figure 2 As shown, the method of using a crucible pretreatment device for gas atomization powder making in this embodiment is as follows: first, wrap 1 to 3 layers of high-temperature resistant cloth on the outer surface of the crucible outer jacket 4, and make the high-temperature resistant mica paper into a cylindrical shape and put it into the crucible outer jacket 4; then put the crucible outer jacket 4 into the crucible pretreatment device, and align the notch below the crucible outer jacket 4 with the protrusion 31 above the lower bottom plate 3; then put the crucible 8 in, use coarse corundum sand 7 to fill the air space between the crucible outer jacket 4 and the crucible 8, and use a drill rod to firmly fix the coarse corundum sand 7 to reduce the gap; put the ceramic guide tube 5 into the through hole at the bottom of the crucible 8, and use fine corundum sand and water glass mixture 6 to fix the ceramic guide tube 5, and finally place the upper end cover 1 to fix the hot air gun 9, and bake the coarse corundum sand 7 and the crucible 8. After baking, turn off the power for standby use.

[0019] When the crucible 8 and the ceramic flow guide tube 5 after atomization need to be quickly replaced, the spare crucible outer sheath 4, the crucible 8 and the ceramic flow guide tube 5 can be integrally loaded into the coil for direct use.

Claims

1. A crucible pretreatment device for gas atomization powder making, characterized in that: The device includes an upper end cover, a metal frame, and a lower base plate, and the specific structure is as follows: The metal frame is welded by vertical bars and circular rings. Two or more circular rings are arranged up and down along the vertical coaxial line. Four or more vertical bars are evenly arranged along the outside of the circular rings. The upper and lower ends of the vertical bars are welded to the circular rings. The lower base plate is connected to the metal frame by welding. There is a bulge in the middle part of the lower base plate, and there is a through hole a in the center. The upper end cover is a movable part, and there is a through hole b in the center.

2. A crucible pretreatment device for gas atomization powder production according to claim 1, characterized in that: The width of the vertical bars and the circular rings of the metal frame is 20-30 mm, and the thickness is 2-4 mm.

3. The crucible pretreatment device for gas atomization powder production according to claim 1, characterized in that: The diameter of the upper end cover is 50-100 mm larger than the outer diameter of the metal frame, the thickness of the upper end cover is 2-4 mm, and the diameter of the middle through hole b is 40-60 mm.

4. The crucible pretreatment device for gas atomization powder production according to claim 1, characterized in that: The thickness of the lower bottom plate is 5-10 mm, the height of the middle protrusion is 10 mm, the diameter of the protrusion part is 50-60 mm, and the diameter of the through hole a is 12 mm.

Images