公开(公告)号：KR1020010026770A

公开(公告)日：2001-04-06

申请号：KR1019990038199

申请日：1999-09-08

Applicant: 한국과학기술원 ,  피케이밸브 주식회사

Inventor： 이진형 ,  권혁상 ,  이혁모 ,  박영환

IPC: C22C38/44

Abstract: PURPOSE: An ultra corrosion-high strength duplex stainless steel for casting containing tungsten is provided to improve fluidity of alloy molten metal and effects of desulfurization and deoxidation during alloy casting, thereby enabling manufacturing of a cast-iron product in a complicated form by optimizing Si content and increasing a tolerance limit of Mn content of a Fe-25Cr-7Ni-1.5Mo-3W alloy. CONSTITUTION: The ultra corrosion-high strength duplex stainless steel for casting containing tungsten comprises 24.0 to 27.0 wt.% of Cr, 6.5 to 7.5 wt.% of Ni, 1.0 to 2.0 wt.% of Mo, 2.0 to 4.0 wt.% of W, 0.2 to 0.35 wt.% of N, up to 0.03 wt.% of C, up to 0.02 wt.% of P, up to 0.004 wt.% of S and a balance of Fe by optimizing a content ratio of Mo to W as 1:2, wherein the content of Mn is limited up to 1.5 wt.%, and the content of Si is limited to 0.7 to 1.1 wt.%.

Abstract translation: 目的：为了提高合金熔融金属的流动性以及在合金铸造过程中脱硫和脱氧的作用，提供了一种用于含钨铸件的超强腐蚀高强度双相不锈钢，从而可以通过优化Si来制造复杂形式的铸铁产品 含量并增加Fe-25Cr-7Ni-1.5Mo-3W合金的Mn含量的公差极限。 构成：用于含钨铸件的超高强度双相不锈钢包括：Cr：24.0〜27.0重量％，Ni：6.5〜7.5重量％，Mo：1.0〜2.0重量％，Mo：2.0〜4.0重量％ W，0.2-0.35重量％的N，至多0.03重量％的C，至多0.02重量％的P，至多0.004重量％的S，余量为Fe，通过将Mo的含量比优化为 W为1：2，其中Mn的含量被限制为1.5重量％，Si的含量限制为0.7-1.1重量％。