アブレシブウォータージェット切断を利用した高クロム鋳鉄肉盛溶接製篩分器の開発

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  • Development of Grizzly Plate by Surfacing of High Chromium Cast Iron and Abrasive Waterjet Machining
  • アブレシブウオータージェット切断を利用した高クロム鋳鉄肉盛溶接製篩分器の開発
  • アブレシブウオータージェット セツダン オ リヨウ シタ コウクロム チュウテツ ニクモリ ヨウセツセイ フルイワケキ ノ カイハツ

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In order to develop wear resistant grizzly plates for sintered ore screening process, a commercial hypereutectic high chromium cast iron containing Nb and V carbides was surfaced by self-shielded tubular-cored arc welding to 32mm thick, 350mm wide and 1000mm long SS400 plates. First, Abrasive Waterjet (AWJ) machinability was investigated using the surfaced SS400 specimens of various thickness, then the abrasion resistance of the deposited metals and conventionally used material was reviewed. <br>  The durability of the newly developed grizzly plates surfaced to 1000mm square SCW490 base metal and machined by AWJ was assessed under the impact and abrading of sintered ore, and compared with conventional cast plates. The main results obtained were as follows ; <br>  (1) When surfacing was carried out with a single torch, transverse cracks generated considerably. On the other hand, the cracks reduced markedly with two-torch surfacing. <br>  (2) The deposited metal showed good abrasion resistance. The AWJ maximum traverse rate however reduced to about half that of SS400 plate. <br>  (3) AWJ machinability significantly reduced when the abrasive waterjets traversed across the cracks, forming uncut zones beneath the cracks by the deflection of the jets. <br>  (4) The newly developed grizzly plates showed about four to six times more durability, while the conventional cast plates only last a couple of months. <br>  (5) Presently, the newly developed grizzly plates are seen to be replacing conventional ones in the plant.

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  • 鋳造工学

    鋳造工学 83 (9), 519-524, 2011

    公益社団法人 日本鋳造工学会

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