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公开(公告)号：US08052812B2
公开(公告)日：2011-11-08
申请号：US11922158
申请日：2006-06-19
摘要： A high carbon cold-rolled steel sheet having both excellent stretch-flange formability and excellent homogeneity of hardness in the sheet thickness direction is provided by a manufacturing method having the steps of: hot-rolling a steel containing 0.2 to 0.7% C by mass at finishing temperatures of (Ar3 transformation point −20° C.) or above to prepare a hot-rolled sheet; cooling the hot-rolled sheet to temperatures of 650° C. or below at cooling rates from 60° C./s or larger to smaller than 120° C./s; coiling the hot-rolled sheet after cooling at coiling temperatures of 600° C. or below; cold-rolling the coiled hot-rolled sheet at rolling reductions of 30% or more to prepare a cold-rolled sheet; and annealing the cold-rolled sheet at annealing temperatures from 600° C. or larger to Ac1 transformation point or lower.
摘要翻译： 通过具有以下步骤的制造方法提供具有优异的拉伸凸缘成形性和优异的板厚方向上的硬度均匀性的高碳冷轧钢板：将含有0.2〜0.7质量％C的钢热轧在 （Ar3相变点-20℃）或以上的最终温度以制备热轧板; 将冷轧板以60℃/秒以上至小于120℃/秒的冷却速度将其冷却至650℃以下。 在600℃或更低的卷取温度下冷却后卷取热轧板; 将卷取的热轧板以30％以上的压下率进行冷轧，制作冷轧板; 并在退火温度为600℃以上至Ac1相变点以下退火冷轧板。
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公开(公告)号：US20100266441A1
公开(公告)日：2010-10-21
申请号：US12803232
申请日：2010-06-22
CPC分类号： C22C38/18 , C21D6/004 , C21D8/0205 , C21D8/0226 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/40 , C22C38/44 , C22C38/48 , C22C38/58
摘要： A high carbon hot-rolled steel sheet which is a hot-rolled spheroidizing annealed material, including 0.2 to 0.7% C, 2% or less Si, 2% or less Mn, 0.03% or less P, 0.035 or less S, 0.08% or less Sol.Al., and 0.01% or less N, by mass, which contains carbide having a particle size of smaller than 0.5 μm in a content of 15% or less by volume to the total amount of carbide, and the difference between the maximum hardness Hv max and the minimum hardness Hv min, ΔHv (=Hv max−Hv min), in the sheet thickness direction being 10 or smaller.
摘要翻译： 含有0.2〜0.7％C，2％以下Si，2％以下Mn，0.03％以下P，0.035以下S，0.08％以上的热轧球墨退火材料的高碳热轧钢板， 或更少的Sol.Al.和0.01％或更小的N，其含有相对于碳化物的总量为15体积％以下的粒径小于0.5μm的碳化物，和 板厚方向的最大硬度Hvmax和最小硬度Hvmin，＆Dgr; Hv（= Hvmax-Hvmin）为10以下。
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公开(公告)号：US20090126836A1
公开(公告)日：2009-05-21
申请号：US11922250
申请日：2006-06-19
CPC分类号： C22C38/18 , C21D6/004 , C21D8/0205 , C21D8/0226 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/40 , C22C38/44 , C22C38/48 , C22C38/58
摘要： A high carbon hot-rolled steel sheet, as a hot-rolled spheroidizing annealed material, having both excellent stretch-flange formability and excellent homogeneity of hardness in the sheet thickness direction is provided by a manufacturing method having the steps of: hot-rolling a steel containing 0.2 to 0.7% C by mass at finishing temperatures of (Ar3 transformation point−20° C.) or above to prepare a hot-rolled sheet; cooling the hot-rolled sheet to temperatures of 650° C. or below at cooling rates from 60° C./s or larger to smaller than 120° C./s; coiling the hot-rolled sheet after cooling at coiling temperatures of 600° C. or below; and annealing the coiled hot-rolled sheet at annealing temperatures from 640° C. or larger to Ac1 transformation point or lower.
摘要翻译： 通过具有以下步骤的制造方法，提供作为热轧球墨退火材料的高碳热轧钢板，其具有优异的拉伸凸缘成形性和优异的板厚方向上的硬度均匀性，其具有以下步骤：热轧 在（Ar 3相变点-20℃）以上的终轧温度下含有0.2〜0.7质量％的钢来制备热轧板; 将冷轧板以60℃/秒以上至小于120℃/秒的冷却速度将其冷却至650℃以下。 在600℃或更低的卷取温度下冷却后卷取热轧板; 并且在从640℃或更大到Ac1相变点或更低的退火温度下对卷取的热轧板进行退火。
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公开(公告)号：US08071018B2
公开(公告)日：2011-12-06
申请号：US12803232
申请日：2010-06-22
CPC分类号： C22C38/18 , C21D6/004 , C21D8/0205 , C21D8/0226 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/40 , C22C38/44 , C22C38/48 , C22C38/58
摘要： A high carbon hot-rolled steel sheet which is a hot-rolled spheroidizing annealed material, including 0.2 to 0.7% C, 2% or less Si, 2% or less Mn, 0.03% or less P, 0.03% or less S, 0.08% or less Sol.Al., and 0.01% or less N, by mass, which contains carbide having a particle size of smaller than 0.5 μm in a content of 15% or less by volume to the total amount of carbide, and the difference between the maximum hardness Hv max and the minimum hardness Hv min, ΔHv (=Hv max−Hv min), in the sheet thickness direction being 10 or smaller.
摘要翻译： 作为热轧球墨退火材料的高碳热轧钢板，包含0.2〜0.7％的C，2％以下的Si，2％以下的Mn，0.03％以下的P，0.03％以下的S，0.08 ％以下的Sol.Al.和0.01质量％以下的N，其含有相对于碳化物总量的15体积％以下的粒径小于0.5μm的碳化物， 在最大硬度Hv max和最小硬度Hv min，＆Dgr; Hv（= Hv max-Hv min）之间的厚度方向为10以下。
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公开(公告)号：US20090095382A1
公开(公告)日：2009-04-16
申请号：US11922158
申请日：2006-06-19
IPC分类号： C21D8/02
摘要： A high carbon cold-rolled steel sheet having both excellent stretch-flange formability and excellent homogeneity of hardness in the sheet thickness direction is provided by a manufacturing method having the steps of: hot-rolling a steel containing 0.2 to 0.7% C by mass at finishing temperatures of (Ar3 transformation point −20° C.) or above to prepare a hot-rolled sheet; cooling the hot-rolled sheet to temperatures of 650° C. or below at cooling rates from 60° C./s or larger to smaller than 120° C./s; coiling the hot-rolled sheet after cooling at coiling temperatures of 600° C. or below; cold-rolling the coiled hot-rolled sheet at rolling reductions of 30% or more to prepare a cold-rolled sheet; and annealing the cold-rolled sheet at annealing temperatures from 600° C. or larger to Ac1 transformation point or lower.
摘要翻译： 通过具有以下步骤的制造方法提供具有优异的拉伸凸缘成形性和优异的板厚方向上的硬度均匀性的高碳冷轧钢板：将含有0.2〜0.7质量％C的钢热轧在 （Ar3相变点-20℃）或以上的最终温度以制备热轧板; 将冷轧板以60℃/秒以上至小于120℃/秒的冷却速度将其冷却至650℃以下。 在600℃或更低的卷取温度下冷却后卷取热轧板; 将卷取的热轧板以30％以上的压下率进行冷轧，制作冷轧板; 并在退火温度为600℃以上至Ac1相变点以下退火冷轧板。
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