1.原材料選用優(yōu)質(zhì)電弧爐精煉真空脫氣工藝生產(chǎn),保證無氣孔、沙眼、裂紋等原材料缺陷,低硫磷等有害成分,N、H、O等有害氣體符合國標(biāo)要求;
2.鍛造工藝合理,鍛造比大于5,將原材料重復(fù)充分鐓粗拔長,消除氣孔等缺陷,細(xì)化晶粒,使組織致密性更高;
3.鍛后正回火處理,消除鍛造應(yīng)力,細(xì)化晶粒,使金屬組織均勻,利于加工,為后續(xù)熱處理做好基礎(chǔ);
4.免費(fèi)粗車,便于精確檢測尺寸和無損超聲波探傷。
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