Porous stainless steel and its manufacturing method, application and special mold for manufacturing method
A manufacturing method, stainless steel technology, applied in the direction of textiles and papermaking, etc., can solve the problems of weak bonding force of green body, limited particle size, cracking and collapsing of green body, etc., and achieve good product surface quality, high product density, heating The effect of low energy consumption
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Embodiment 1
[0035] A method for manufacturing porous stainless steel, comprising the steps of:
[0036]a. compress martensitic stainless steel fibers, martensitic stainless steel particles or a mixture of the two to form a block green body;
[0037] b. The green body is sintered, quenched and tempered under vacuum to prepare porous stainless steel.
[0038] The martensitic stainless steel fiber is made by shearing the annealed and softened stainless steel wire. The annealing temperature is kept at 830° C. to 900° C. and a vacuum degree of 0.13 Pa to 1.3 Pa for 2 hours, and then furnace cooled.
[0039] The diameter of the martensitic stainless steel fiber is 30 μm-200 μm, and the length is 2 mm-6 mm; the grain size of the martensitic stainless steel particle is 50 μm-500 μm.
[0040] Apply a compressive stress of 50MPa to 300MPa to martensitic stainless steel fibers, martensitic stainless steel particles or a mixture of the two. The sintering process uses a pressurized air-cooled vacuum...
Embodiment 2
[0047] Such as Figure 1-5 As shown, a special pressing die for pressing the block-shaped green body in Embodiment 1 includes a front side plate 1, a rear side plate 2, a left side plate 3, a right side plate 4, a lower pad 5 and an upper punch 6 , the front side plate 1, the rear side plate 2, the left side plate 3, the right side plate 4 and the lower cushion block 5 enclose the mold cavity, and also include a mold cavity for locking the front side plate 1, the rear side plate 2, The detachable mold clamping structure of the left side plate 3 and the right side plate 4, the lower block 5 is placed on the workbench of the press, supported by the workbench, and the upper punch 6 is driven by the press to work.
[0048] Preferably, matching grooves 7 are respectively opened on both sides of the front side plate 1 and the rear side plate 2 , and the left side plate 3 and the right side plate 4 are respectively connected to the corresponding two matching grooves 7 .
Embodiment 3
[0050] Such as figure 1 As shown, the detachable mold clamping structure includes a hydraulic cylinder 8 and a guide rail 9 fixed on the press frame, and the front side plate 1, the rear side plate 2, the left side plate 3 and the right side plate 4 have The chute 10 connected with the guide rail 9 and the hydraulic cylinder 8 are respectively connected with the front side plate 1 , the rear side plate 2 , the left side plate 3 , the right side plate 4 and the lower pad 5 .
[0051] The working process and working principle of the present invention: the hydraulic cylinder first pushes the lower block into place, then pushes the left side plate and the right side plate into place, and then pushes the front side plate and the rear side plate to move, so that the cooperation between the front side plate and the rear side plate The groove covers the left side plate and the right side plate. At this time, a mixture of martensitic stainless steel fibers with a diameter of 200 μm and...
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Abstract
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