-
1.发明授权Method for minimizing nonuniform nucleation and supersolvus grain growth in a nickel-base superalloy 失效在镍基超级合金中最小化不均匀成核和超溶解晶粒生长的方法
公开(公告)号：US5529643A
公开(公告)日：1996-06-25
申请号：US323969
申请日：1994-10-17
申请人： Duk Y. Yoon , Aldo E. Murut , Michael F. Henry , Renee M. Rohling , Charles P. Blankenship , Mark G. Benz , Edward L. Raymond , Eric S. Huron
发明人： Duk Y. Yoon , Aldo E. Murut , Michael F. Henry , Renee M. Rohling , Charles P. Blankenship , Mark G. Benz , Edward L. Raymond , Eric S. Huron
IPC分类号： C22F1/10
CPC分类号： C22F1/10
摘要： A method is provided for obtaining uniform grain growth within .gamma.' precipitation strengthened nickel-base superalloys. The method includes forming a billet having a very fine grain size in order to achieve optimum superplasticity of the superalloy during forging. The article is then heated to a pre-working hold temperature in a manner which prevents coarsening of the microstructure and a loss of superplasticity. The article is then worked, such as by forging, at a temperature below the .gamma.' solvus temperature of the alloy, so as to maintain local strain rates within the article below a critical strain rate for random grain growth, and so as to maintain the strain rate gradient throughout the article below a critical upper limit. After working, the article is subjected to annealing at a temperature which is less than the .gamma.' solvus temperature of the alloy, and for a duration which is sufficient to remove accumulated metallurgical strain in the article. A supersolvus heat treatment is then performed by further heating the article to a temperature above the .GAMMA.' solvus temperature of the superalloy for a duration sufficient to uniformly coarsen the grains of the article.
摘要翻译： 提供了一种在γ'沉淀强化镍基超级合金中获得均匀晶粒生长的方法。 该方法包括形成具有非常细晶粒度的坯料，以便在锻造期间达到超合金的最佳超塑性。 然后将制品以防止微结构粗化和超塑性损失的方式加热到预加工保持温度。 然后将该制品例如通过锻造在低于合金的γ'固溶温度的温度下加工，以使得该制品内的局部应变速率低于随机晶粒生长的临界应变速率，并且保持 整个制品的应变速率梯度低于临界上限。 加工后，制品在比合金的γ'溶解温度低的温度下进行退火，持续时间足以清除制品中累积的冶金应变。 然后通过将制品进一步加热到超过合金的GAMMA'solvus温度的温度持续足以均匀地粗化制品的颗粒的时间来进行超溶解热处理。
-
2.发明授权
公开(公告)号：US5891272A
公开(公告)日：1999-04-06
申请号：US704221
申请日：1996-08-23
CPC分类号： C22C19/056 , C22F1/10
摘要： A .gamma.' precipitation strengthened nickel-base superalloy provided in powder metal or cast and wrought form and alloyed to minimize nucleation tendencies and control grain growth. The superalloy includes a fine dispersion of a second phase in sufficient amounts to prevent critical grain growth in the superalloy when the superalloy is subjected to temperatures above its .gamma.' solvus temperature. The superalloy preferably contains at least about 0.030 weight percent carbon or about 27 to about 2000 ppm yttrium in order to produce a volume fraction of the second phase which is sufficient to cover a minimum of about 10 percent of the grain boundary area. The fine dispersion of the second phase restricts the grain boundary motion of the alloy during supersolvus heat treatment, thereby preventing random grain growth during supersolvus heat treatment and yielding a microstructure whose grain size is uniform, for example, having a grain size range of about 2 to about 3 ASTM units and being substantially free of random grain growth in excess of about 2 ASTM units coarser than the desired grain size range.
摘要翻译： 一种γ'沉淀强化的镍基超级合金，以粉末金属或铸造和锻造形式提供，合金化以最小化成核倾向并控制晶粒生长。 超合金包括足够量的第二相的细分散体，以防止超合金在高于其γ'固溶体温度的温度下超临界晶界生长。 超合金优选含有至少约0.030重量％的碳或约27至约2000ppm的钇，以便产生第二相的体积分数，其足以覆盖至少约百分之十的晶界面积。 第二相的细分散限制了超溶热处理期间合金的晶界运动，从而防止了在超溶解热处理期间的随机晶粒生长，并产生了晶粒尺寸均匀的微结构，例如晶粒尺寸范围为约2 至约3个ASTM单位，并且基本上不含超过所需晶粒尺寸范围粗大约2个ASTM单元的随机晶粒生长。
-
3.发明授权Method for forming a nickel-base superalloy having improved resistance to abnormal grain growth 失效形成具有改善的抗异常晶粒生长耐性的镍基超级合金的方法
公开(公告)号：US5584947A
公开(公告)日：1996-12-17
申请号：US293343
申请日：1994-08-18
CPC分类号： C22C19/056 , C22F1/10
摘要： A method is provided for obtaining uniform grain growth within .gamma.' precipitation strengthened nickel-base superalloys provided in powder metal or cast and wrought form. The method includes alloying the nickel-base superalloy to contain a minimum calculated amount of carbon which, when finely dispersed within the alloy using suitable processing methods, yields a sufficient amount of carbide phase which restricts the grain boundary motion of the alloy during supersolvus heat treatment. When appropriately processed, the grains are not permitted to grow randomly during supersolvus heat treatment, making possible a microstructure whose grain size is uniform, having a grain size range of about 2 to about 3 ASTM units and being substantially free of random grain growth in excess of about 2 ASTM units coarser than the desired grain size range.
摘要翻译： 提供了一种在粉末金属或铸造和锻造形式提供的γ'沉淀强化镍基超级合金中获得均匀晶粒生长的方法。 该方法包括将镍基超级合金合金化以含有最小计算量的碳，当使用合适的加工方法在合金中精细分散时，产生足够量的碳化物相，其限制了在超溶解热处理期间合金的晶界运动 。 当适当加工时，不允许晶粒在超溶解热处理期间随机生长，使得其晶粒尺寸均匀的微结构可能具有约2至约3 ASTM单位的晶粒尺寸范围并且基本上不含任意晶粒生长过量 约2个ASTM单位比期望的晶粒尺寸范围粗。
-
公开(公告)号：US5393488A
公开(公告)日：1995-02-28
申请号：US102923
申请日：1993-08-06
IPC分类号： C22C38/52
CPC分类号： C22C38/52
摘要： A duplex strengthened structural steel that is particularly suitable for demanding applications which require both high yield strength and fatigue properties is provided. The preferred steel alloys of this invention are characterized by both the presence of intermetallic strengthening precipitates like maraging steels, as well as alloy carbide strengtheners as is common with secondary hardening steels. Titanium is substantially absent from the preferred steel alloys of this invention. Thus the formation of nonmetallic inclusions, such as titanium carbonitrides, are alleviated which correspondingly enhances the fatigue properties of the preferred alloys. To compensate for the lack of titanium strengthening precipitates within the alloy, additions of aluminum are provided such that the aluminum forms intermetallic strengthening precipitates with nickel.
摘要翻译： 提供了特别适用于需要高屈服强度和疲劳性能的要求应用的双相加强结构钢。 本发明优选的钢合金的特征在于金属间强化沉淀如马氏体时效钢的存在，以及与二次硬化钢常见的合金碳化物加强剂。 本发明优选的钢合金中基本上不存在钛。 因此，减少了诸如碳氮化钛之类的非金属夹杂物的形成，这相应地提高了优选合金的疲劳性能。 为了补偿合金中缺少钛强化析出物，提供了铝的添加，使得铝与镍形成金属间强化沉淀。
-
公开(公告)号：US4356612A
公开(公告)日：1982-11-02
申请号：US135486
申请日：1980-03-31
申请人： James R. Becker , Edward L. Raymond
发明人： James R. Becker , Edward L. Raymond
CPC分类号： B23P15/001 , B21C23/22 , B21K1/14 , Y10T137/7036 , Y10T29/49419 , Y10T29/49423 , Y10T29/49865
摘要： An improved forged steel structure lined with a corrosion resistant metal in which the lining and body are forged together. The improved method includes the steps of securing a bar of corrosion resistant metal within an alloy steel tube to form a billet, forging the billet to the desired shape with sufficient corrosion resistant metal to line at least one of the cavities of the desired shape and machining the forging to produce the desired lined structure. The amount of alloy steel and corrosion resistant metal in the billet being preselected to provide the desired lining without substantially weakening the structure.
摘要翻译： 一种改进的锻造钢结构，内衬耐腐蚀金属，其中衬里和身体锻造在一起。 该改进的方法包括以下步骤：将合金钢管内的耐腐蚀金属棒固定以形成坯料，将坯料锻造成具有足够耐腐蚀金属的所需形状，以将至少一个所需形状的空腔和加工 锻造产生所需的衬里结构。 钢坯中的合金钢和耐腐蚀金属的数量被预先选择以提供所需的衬里，而不会明显削弱结构。
-
公开(公告)号：US4155577A
公开(公告)日：1979-05-22
申请号：US914419
申请日：1978-06-12
申请人： Edward L. Raymond
发明人： Edward L. Raymond
IPC分类号： E05C17/36
CPC分类号： E05C17/365 , Y10T292/283 , Y10T70/483
摘要： A security device used to check a door in a partially open position to prevent unauthorized entrance into a room having a doorway normally closed by the door. The security device has an anchor assembly, including a lag bolt secured to the door frame adjacent the door knob when the door is in a closed position. The lag bolt has a body carrying a head located outwardly from the frame. A rigid ring having an inside diameter slightly greater than the diameter of the door knob is attached to the anchor assembly with a link chain. The link chain has an anchor link surrounding the body of the lag screw and a ring link extended through the ring. A spacer sleeve surrounding the body of the anchor assembly holds the anchor link adjacent the head spaced from the frame and casing of the doorway. The intermediate chain links connecting the anchor link with the ring link are surrounded with a sleeve. The sleeve is located in a tight engagement with the intermediate links and allows for free movement of the anchor link and ring link.
摘要翻译： 用于检查处于部分打开位置的门的安全装置，以防止未经授权的入口进入通常由门关闭的门口的房间。 安全装置具有锚固组件，其包括当门处于关闭位置时固定到邻近门把手的门框上的拉杆螺栓。 拉杆螺栓具有承载从框架向外定位的头部的主体。 具有略大于门把手的直径的内径的刚性环通过链节连接到锚固组件。 连杆链具有围绕拉力螺钉的主体的锚固链和通过环延伸的环形连杆。 围绕锚固组件的主体的间隔套筒将锚杆邻近头部保持与门口的框架和壳体间隔开。 将锚链与环链节连接的中间链条链条用套筒包围。 套筒与中间链节紧密配合，并允许锚链和环链节的自由移动。
-
公开(公告)号：US4971101A
公开(公告)日：1990-11-20
申请号：US620800
申请日：1984-08-20
IPC分类号： B22F7/08
CPC分类号： B22F7/08 , Y10T137/7036 , Y10T29/49421
摘要： A structure having a metal body with a plurality of intersecting cavities and a consolidated corrosion resistant powdered metal lining and metallurgically engaging the walls of the intersecting cavities.
摘要翻译： 一种具有金属体的结构，该金属体具有多个相交腔，并具有固结的耐腐蚀粉末金属衬里，并且与相交腔的壁冶金接合。
-
公开(公告)号：USRE32389E
公开(公告)日：1987-04-07
申请号：US714156
申请日：1985-03-20
IPC分类号： B22F7/08
CPC分类号： B22F7/08 , Y10T29/49423
摘要： The method of forming a lining in the cavities of a body by application of powdered metal consolidated and bonded thereon by a hot isostatic pressing process. A space lining the cavities in the body is provided by tubular members, one intersecting with the other or in close spaced relation thereto, powdered metal fills the space, a vacuum is drawn on the space, the body is subjected to forming conditions and then the body cavities are machined to their final shape with such machining generally removing the tubular members.
-
公开(公告)号：US4477955A
公开(公告)日：1984-10-23
申请号：US393055
申请日：1982-06-28
CPC分类号： B22F7/08 , Y10S29/031 , Y10T29/49412
摘要： The method of forming a lining in the cavities of a body by application of powdered metal consolidated and bonded thereon by a hot isostatic pressing process. A space lining the cavities in the body is provided by tubular members, one intersecting with the other or in close spaced relation thereto, powdered metal fills the space, a vacuum is drawn on the space, the body is subjected to forming conditions and then the body cavities are machined to their final shape with such machining generally removing the tubular members.
摘要翻译： 通过施加通过热等静压法固结和粘结在其上的粉末金属在主体的空腔中形成衬里的方法。 衬套体内的空腔的空间由管状构件提供，一个与另一个相交或与其间隔开紧密的关系，粉末状金属填充空间，在该空间上抽真空，使主体经受成形条件， 通过这种加工通常去除管状构件将体腔加工成其最终形状。
-
-
-
-
-
-
-
-
搜索结果
9 条记录 (耗时 0.036 秒)
