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    • 5. 发明授权
    • Perimeter and method of controlling perimeter
    • 周边和周边控制方法
    • US08157379B2
    • 2012-04-17
    • US12868174
    • 2010-08-25
    • Takuya Hara
    • Takuya Hara
    • A61B3/02
    • A61B3/024
    • In a perimeter, luminance judging means measures a sensitivity of an examinee, sensitivity deviation computing means obtains a sensitivity deviation, means for computing ratio to p value obtains a ratio to p value, and means for adding ratios to p value adds ratios to p value of respective measurement positions. The sensitivity deviation at the position where sensitivity dispersion is large is low evaluated and the sensitivity deviation at the position where the sensitivity dispersion is small is highly evaluated. Then, an element of the position where the sensitivity was changed can be also considered in a graph showing test results of perimetry periodically conducted with time.
    • 在周边,亮度判定单元测定受检者的灵敏度,灵敏度偏差运算单元取得灵敏度偏差,计算出与p值的比值取得与p值的比值的装置,以及将p值与p值的比值相加的装置 的各个测量位置。 灵敏度偏差大的位置的灵敏度偏差被评价低,灵敏度色散小的位置的灵敏度偏差被高度评价。 然后,在表示周期性地进行的周期性测试结果的图表中也可以考虑灵敏度变化位置的元素。
    • 8. 发明授权
    • High-strength steel pipe excellent in low temperature toughness and toughness at weld heat-affected zone
    • 焊接热影响区的低温韧性和韧性优良的高强度钢管
    • US07601231B2
    • 2009-10-13
    • US10444743
    • 2003-05-23
    • Takuya HaraHitoshi Asahi
    • Takuya HaraHitoshi Asahi
    • C22C38/04C22C38/14C22C38/12
    • C22C38/02C21D8/0226C21D8/10C21D8/1261C21D2211/002C21D2211/008C22C38/42C22C38/44C22C38/46C22C38/58Y10S148/909
    • A high-strength steel pipe excellent in weldability on site and a method for producing the steel pipe by improving the reliability of the low temperature toughness of a steel are provided. For example, the steel pipe includes elements to enhance hardenability for furthering high-strengthening and also improving toughness at a weld heat affected zone subjected to double or more layer welding. In the method, the steel is made to consist of a structure composed of bainite and/or martensite by containing prescribed amounts of C, Si, Mn, P, S, Ni, Mo, Nb, Ti, Al and N, and, as occasion demands, one or more of B, V, Cu, Cr, Ca, REM, and Mg, and regulating C, Si, Mn, Cr, Ni, Cu, V and Mo. Such elements enhancing hardenability, by a specific relational expression. The diameter of prior austenite grains may be regulated in a prescribed range. The method may include heating a casting to a temperature not lower than the Ac3 point, hot rolling such casting, and thereafter cooling the resulting hot-rolled steel plate at a prescribed cooling rate.
    • 提供了一种现场焊接性优异的高强度钢管和通过提高钢的低温韧性的可靠性来制造钢管的方法。 例如,钢管包括提高淬火性的元素,以进一步提高强化强度,并提高经受双层或多层焊接的焊接热影响区的韧性。 在该方法中,通过含有规定量的C,Si,Mn,P,S,Ni,Mo,Nb,Ti,Al和N,由贝氏体和/或马氏体构成的结构,由钢构成,作为 需要B,V,Cu,Cr,Ca,REM和Mg中的一种或多种,​​调节C,Si,Mn,Cr,Ni,Cu,V和Mo。这些元素通过具体的关系式提高淬透性 。 原奥氏体晶粒的直径可以在规定的范围内调节。 该方法可以包括将铸件加热到不低于Ac3点的温度,热轧这种铸造,然后以规定的冷却速度冷却所得到的热轧钢板。
    • 9. 发明授权
    • Martensitic stainless steel having excellent hot workability and sulfide
stress cracking resistance
    • 具有优异的热加工性和耐硫化物应力开裂性的马氏体不锈钢
    • US5820699A
    • 1998-10-13
    • US776125
    • 1997-04-17
    • Hitoshi AsahiTakuya HaraAkira Kawakami
    • Hitoshi AsahiTakuya HaraAkira Kawakami
    • C21D9/08C21D6/00C22C38/00C22C38/42C22C38/44C22C38/50
    • C21D6/004C22C38/42C22C38/44C21D2211/008
    • A martensitic stainless steel capable of developing a tempered martensitic structure, comprising by weight C: 0.005 to 0.05%, Si.ltoreq.0.50%, Mn: 0.1 to 1.0%, P.ltoreq.0.03%, S.ltoreq.0.005%, Mo: 1.0 to 3.0%, Cu: 1.0 to 4.0%, Ni: 5 to 8%, Al.ltoreq.0.06%, Cr and Mo satisfying a requirement represented by the formula Cr+1.6Mo.gtoreq.13; and C, N, Ni, Cu, Cr, and Mo satisfying a requirement represented by the formula Ni(eq): 40C+34N+Ni+0.3Cu-1.1Cr-1.8Mo.gtoreq.-10.5, and optionally at least one member selected from the group consisting of Ti, Zr, Ca, and REM, with the balance consisting essentially of Fe. The present invention provides a martensitic stainless steel having excellent resistance to corrosion by CO.sub.2 and sulfide stress cracking and good hot workability.
    • PCT No.PCT / JP95 / 01453 Sec。 371日期1997年04月17日 102(e)日期1997年4月17日PCT提交1995年7月21日PCT公布。 出版物WO96 / 03532 日期:1996年2月8日具有显影回火马氏体组织的马氏体系不锈钢,其含量为C:0.005〜0.05%,Si≤0.50%,Mn:0.1〜1.0%,P≤0.03% /=0.005%,Mo:1.0〜3.0%,Cu:1.0〜4.0%,Ni:5〜8%,Al:0.06%,Cr和Mo满足式Cr + 1.6Mo> 13; 和C,N,Ni,Cu,Cr和Mo满足由式Ni(eq)表示的要求:40℃+ 34N + Ni + 0.3Cu-1.1Cr-1.8Mo> = 10.5,以及任选的至少一种 选自Ti,Zr,Ca和REM组成的组分,余量基本上由Fe组成。 本发明提供一种马氏体不锈钢,具有优异的耐CO 2腐蚀性和耐硫化应力开裂性以及良好的热加工性。
    • 10. 发明授权
    • High-corrosion-resistant martensitic stainless steel having excellent
weldability and process for producing the same
    • 具有优异焊接性的高耐腐蚀马氏体不锈钢及其制造方法
    • US5716465A
    • 1998-02-10
    • US649701
    • 1996-08-27
    • Takuya HaraAsahi HitoshiHiroshi TamehiroTaro MurakiAkira Kawakami
    • Takuya HaraAsahi HitoshiHiroshi TamehiroTaro MurakiAkira Kawakami
    • C21D1/18C21D8/02C22C38/42
    • C22C38/42C21D8/0205C21D1/18C21D2211/008
    • A high-corrosion-resistant martensitic stainless steel possessing excellent weldability and SSC resistance, having a tempered martensitic structure, characterized by comprising steel constituents satisfying by weight C: 0.005 to 0.035%, Si: not more than 0.50%, Mn: 0.1 to 1.0%, P: not more than 0.03%, S: not more than 0.005%, Mo: 1.0 to 3.0%, Cu: 1.0 to 4.0%, Ni: 1.5 to 5.0%, Al: not more than 0.06%, N: not more than 0.01%, and Cr satisfying a requirement represented by the formula 13>Cr+1.6Mo.gtoreq.8, C+N.gtoreq.0.03, 40C+34N+Ni+0.3Cu-1.1Cr-1.8 Mo.gtoreq.10, or further comprising at least one element selected from the group consisting of Ti: 0.05 to 0.1%, Zr: 0.01 to 0.2%, Ca: 0.001 to 0.02%, and REM: 0.003 to 0.4%, with the balance consisting essentially of Fe. A process for producing a martensitic stainless steel, comprising the steps of: subjecting a steel plate, produced by hot-rolling a stainless steel slab having the above composition, to austenitization at a temperature of Ac.sub.3 point to 1000.degree. C. to harden the steel plate; subjecting the hardened steel plate to final tempering at a temperature of 550.degree. C. to Ac.sub.1 point; and cold-rolling the steel plate.
    • PCT No.PCT / JP95 / 01950 Sec。 371日期:1996年8月27日 102(e)日期1996年8月27日PCT提交1995年9月27日PCT公布。 公开号WO96 / 10654 日期1996年4月11日具有回火马氏体组织的耐焊接性和耐SSC性优异的高耐腐蚀马氏体系不锈钢,其特征在于,含有C:0.005〜0.035%,Si:0.50%以下, Mn:0.1〜1.0%,P:0.03%以下S:0.005%以下,Mo:1.0〜3.0%,Cu:1.0〜4.0%,Ni:1.5〜5.0%,Al:0.06以下 %,N:0.01以下,Cr满足式13> Cr + 1.6Mo> / = 8,C + N> = 0.03,40C + 34N + Ni + 0.3Cu-1.1Cr- 或者还包含选自Ti:0.05〜0.1%,Zr:0.01〜0.2%,Ca:0.001〜0.02%,REM:0.003〜0.4%的至少一种元素,与 余量基本上由Fe组成。 一种马氏体不锈钢的制造方法,其特征在于,包括以下步骤:将具有上述组成的不锈钢板进行热轧制成的钢板在Ac 3点〜1000℃的温度下进行奥氏体化,使钢 盘子; 使淬火钢板在550℃至Ac1点的温度下进行最终回火; 并冷轧钢板。