周期軋管機(jī)用空心芯棒的生產(chǎn)新工藝
A NEW MANUFACTURING PROCESS FOR HOLLOW MANDREL USED BY PILGER PIPE MILL
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摘要: 介紹了俄羅斯車?yán)镅刨e斯克鋼管廠采用新工藝(平爐冶煉-鋼包精煉-連鑄-電渣重熔-鍛壓-熱處理-鉆孔)及20Cr3MnNVNb鋼生產(chǎn)周期軋管用空心芯棒的情況。試驗(yàn)結(jié)果表明,采用新工藝生產(chǎn)芯棒,金屬用量較原工藝少20%~30%;新工藝生產(chǎn)的芯棒非金屬夾雜極少,表面質(zhì)量好,無(wú)需機(jī)加工即可進(jìn)行淬火處理,使用壽命比原工藝生產(chǎn)的延長(zhǎng)了50%~70%;采用新工藝生產(chǎn)的芯棒軋管,效率高,芯棒消耗減少。采用20Cr3MnNVNb鋼制作芯棒坯,其成本比用25Cr2Mo1V鋼低20萬(wàn)盧布。Abstract: Introduced in this paper is how Chelyabinsk Steel Tube Works, Russia, produced hollow mandrel used by Pilger pipe mill by means of a new process (OHF melting-LF refining-continuous casting-electroslag remelting-forging-heat treatment-boring) and 20Cr3MnNVNb steel. Relevant testing results show that using the said new manufacturing process to produce the mandrel is capable of 20%~30% reduction of metal consumption compared with the traditional process, little nonmetallic inclusion and better outer surface quality of the mandrel, directly quenching of the mandrel without machining, 50%~70% longer service life of the mandrel compared with mandrel made with the traditional process. As for the new process-made mandrel itself, it will result in high efficient pipe production and reduced mandrel consumption. And cost of the mandrel blank made of 20Cr3MnNVNb steel with the new manufacturing process is 200, 000 Rouble lower than that of the mandrel blank made of 25Cr2Mo1V steel.
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