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    • 1. 发明申请
    • High-grade duplex stainless steel with much suppressed formation of intermetallic phases and having an excellent corrosion resistance, embrittlement resistance castability and hot workability
    • 高品位双相不锈钢,具有抑制金属间相形成并且具有优异的耐腐蚀性,耐脆性铸造性和热加工性
    • US20050158201A1
    • 2005-07-21
    • US10507069
    • 2003-03-24
    • Yong-Soo ParkSoon-Tae KimIn-Sung Lee
    • Yong-Soo ParkSoon-Tae KimIn-Sung Lee
    • C22C38/00C22C38/42C22C38/44C22C38/58
    • C22C38/44C21D2211/001C21D2211/005C22C38/001C22C38/002C22C38/005C22C38/42C22C38/58
    • Formation of intermetallic phases such as sigma (σ) and khi (χ) shows detrimental effects on the corrosion and mechanical properties of high-grade duplex stainless steel. The present invention provides high-grade duplex stainless steel with much suppressed formation of intermetallic phases, of which the chemical composition consists essentially, on a weight basis, of: Cr: 21.0%˜38.0%, Ni: 3.0%˜12.0%, Mo: 1.5%˜6.5%, W: 6.5% or less, Si: 3.0% or less, Mn: 8.0% or less, N: 0.2%˜0.7%, C: 0.1% or less, at least one element selected from the group consisting of Ba: 0.0001˜0.6% and one or more elements of Mischmetal (MM) and Y: 0.0001˜1.0% in total, and a balance of Fe and incidental impurities. The pitting resistance equivalent has a value of 40≦PREW≦67 defined by the following formula (1): PREW=wt. % Cr+3.3(wt. % Mo+0.5 wt. % W)+30 wt. % N  ((1)The present high-grade duplex stainless steel exhibits an excellent corrosion resistance, embrittlement resistance, castability and hot workability.
    • 金属间相的形成,如σ(sigma)和khi(chi)显示对高级双相不锈钢的腐蚀和机械性能的不利影响。 本发明提供了高度双相不锈钢,其金属间相的形成受到很大的抑制,其化学组成基本上以重量为基准计:Cr:21.0%〜38.0%,Ni:3.0%〜12.0%,Mo :1.5%〜6.5%,W:6.5%以下,Si:3.0%以下,Mn:8.0%以下,N:0.2%〜0.7%,C:0.1%以下,选自 由Ba:0.0001〜0.6%和一个或多个Mischmetal(MM)元素组成的组,Y:0.0001〜1.0%,余量为Fe和杂质。 点蚀电阻等效值由以下公式(1)定义的40 <= PREW <= 67的值:<?in-line-formula description =“In-line Formulas”end =“lead”?> PREW = wt。 %Cr + 3.3(重量%Mo + 0.5重量%W)+30重量% %N((1)<?in-line-formula description =“In-line Formulas”end =“tail”?>本高级双相不锈钢表现出优异的耐腐蚀性,耐脆性,铸造性和热加工性。
    • 6. 发明申请
    • HEATING APPARATUS USING HOT WATER AND STEAM
    • 加热装置使用热水和蒸汽
    • US20100200198A1
    • 2010-08-12
    • US12670859
    • 2008-07-24
    • Yong-Soo Park
    • Yong-Soo Park
    • F28D15/00
    • F24D1/08F24D3/14F24D19/1009F24H7/00F24H9/1827Y02B30/16Y02B30/24
    • The present invention relates to a heating apparatus using hot water and steam, in which a heater receives and heats a source water to generate hot water and steam, and the mixture of hot water and steam is automatically circulated inside a heating pipe due to an expansion force of the generated steam. According to the heating apparatus of the invention, the heater is supplied with a source water and heats the source water to generate hot water and steam. The generated hot water and steam is automatically circulated inside the heating pipe in a state of mixture of hot water and steam, thereby eliminating the need for a separate circulating means for circulating the hot water and steam.
    • 本发明涉及一种使用热水和蒸汽的加热装置,其中加热器接收并加热源水以产生热水和蒸汽,并且热水和蒸汽的混合物由于膨胀而自动在加热管内循环 产生的蒸汽的力。 根据本发明的加热装置,向加热器供给源水,并加热源水以产生热水和蒸汽。 所产生的热水和蒸汽在热水和蒸汽的混合状态下自动在加热管内循环,从而不需要用于循环热水和蒸汽的单独的循环装置。