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公开(公告)号：US20120267009A1
公开(公告)日：2012-10-25
申请号：US13441404
申请日：2012-04-06
Applicant: Koji OBAYASHI , Mamoru TAKEUCHI , Ryuta SUGIYAMA , Ken SHIMIZU , Koichi KATO
Inventor： Koji OBAYASHI , Mamoru TAKEUCHI , Ryuta SUGIYAMA , Ken SHIMIZU , Koichi KATO
CPC classification number: C23C8/02 , C21D1/06 , C21D1/25 , C21D2211/002 , C21D2211/008 , C21D2211/009 , C23C8/20 , C23C8/22 , C23C8/80
Abstract: A manufacturing method for a composite steel part including preparing an intermediate product in which an extra portion, which has a thickness equal to or more than that of a carburized layer to be formed in a subsequent carburizing step, has been added to a welding expected portion, carburizing the intermediate product by heating to an austenitizing temperature or more in a carburizing atmosphere, then cooling the intermediate product at a cooling rate less than a rate at which martensitic transformation occurs and without completing structural transformation due to the cooling, quenching a portion of the intermediate product after heating to an austenitizing range by high-density energy and thereafter cooling to cause martensitic transformation to form a carburized quenched portion, removing an extra portion of the intermediate product; and then welding a second steel part to the welding expected portion.
Abstract translation: 1.一种复合钢部件的制造方法，其特征在于，包括制备中间产品，其中在随后的渗碳步骤中形成厚度等于或大于待形成的渗碳层的厚度的附加部分已经被添加到焊接预期部分 通过在渗碳气氛中加热到奥氏体化温度以上，然后以低于马氏体相变速度的冷却速度冷却中间产物而不会由于冷却而完成结构变形而使中间产物渗碳，骤冷部分 中间产品通过高密度能量加热到奥氏体化程度，然后冷却以使马氏体相变形成渗碳淬火部分，除去额外的中间产物; 然后将第二钢部件焊接到焊接预期部分。
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公开(公告)号：US08956467B2
公开(公告)日：2015-02-17
申请号：US13441404
申请日：2012-04-06
Applicant: Koji Obayashi , Mamoru Takeuchi , Ryuta Sugiyama , Ken Shimizu , Koichi Kato
Inventor： Koji Obayashi , Mamoru Takeuchi , Ryuta Sugiyama , Ken Shimizu , Koichi Kato
CPC classification number: C23C8/02 , C21D1/06 , C21D1/25 , C21D2211/002 , C21D2211/008 , C21D2211/009 , C23C8/20 , C23C8/22 , C23C8/80
Abstract: A manufacturing method for a composite steel part including preparing an intermediate product in which an extra portion, which has a thickness equal to or more than that of a carburized layer to be formed in a subsequent carburizing step, has been added to a welding expected portion, carburizing the intermediate product by heating to an austenitizing temperature or more in a carburizing atmosphere, then cooling the intermediate product at a cooling rate less than a rate at which martensitic transformation occurs and without completing structural transformation due to the cooling, quenching a portion of the intermediate product after heating to an austenitizing range by high-density energy and thereafter cooling to cause martensitic transformation to form a carburized quenched portion, removing an extra portion of the intermediate product; and then welding a second steel part to the welding expected portion.
Abstract translation: 1.一种复合钢部件的制造方法，其特征在于，包括制备中间产品，其中在随后的渗碳步骤中形成厚度等于或大于待形成的渗碳层的厚度的附加部分已经被添加到焊接预期部分 通过在渗碳气氛中加热到奥氏体化温度以上，然后以低于马氏体相变速度的冷却速度冷却中间产物而不会由于冷却而完成结构变形而使中间产物渗碳，骤冷部分 中间产品通过高密度能量加热到奥氏体化程度，然后冷却以使马氏体相变形成渗碳淬火部分，除去额外的中间产物; 然后将第二钢部件焊接到焊接预期部分。
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