公开(公告)号：US20180065184A1

公开(公告)日：2018-03-08

申请号：US15807214

申请日：2017-11-08

Applicant: TAIWAN POWDER TECHNOLOGIES CO., LTD.

Inventor： Kuen-Shyang HWANG ,  Li-Hui CHENG ,  Yung-Chung LU

IPC: B22F3/24 ,  C23C8/22 ,  B22F3/22 ,  B22F3/11 ,  C22C38/44 ,  C22C38/20 ,  C22C38/02 ,  C22C38/04

CPC classification number: B22F3/24 ,  B22F1/0011 ,  B22F3/11 ,  B22F3/1146 ,  B22F3/225 ,  B22F2003/241 ,  B22F2201/30 ,  B22F2301/35 ,  B22F2998/10 ,  C22C1/08 ,  C22C33/0285 ,  C22C38/02 ,  C22C38/04 ,  C22C38/20 ,  C22C38/42 ,  C22C38/44 ,  C23C8/02 ,  C23C8/22 ,  B22F3/101 ,  B22F2201/013 ,  B22F2201/20 ,  B22F3/1021

Abstract: This invention presents a method for manufacturing sintered and carburized porous stainless steel parts, comprising steps of: sintering stainless steel powders to obtain a porous sintered stainless steel, wherein the porous sintered stainless steel comprises a three dimensional network skeleton structure with a large number of interconnected pore channels; and carburizing the porous sintered stainless steel by a non-halogenated carbon-bearing gas, wherein the porous sintered stainless steel being maintained at a carburizing temperature below 600° C. such that carbon atoms can be implanted into the porous sintered stainless steel and converts a surface portion of the skeleton structure, that is in contact with the carbon-bearing gas in the interconnected pore channels, into a carburized layer. A carburized layer is formed and spread over a skeleton structure of the sintered porous body. Thereby, the strength, surface hardness, and core hardness of the sintered body are significantly increased.

公开(公告)号：US20150196956A1

公开(公告)日：2015-07-16

申请号：US14669740

申请日：2015-03-26

Applicant: TAIWAN POWDER TECHNOLOGIES CO., LTD.

Inventor： Kuen-Shyang HWANG ,  Li-Hui CHENG ,  Yung-Chung LU

IPC: B22F3/11 ,  B22F3/26 ,  C22C38/02 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  B22F3/12 ,  C22C38/58

CPC classification number: C22C38/02 ,  B22F1/0011 ,  B22F3/1146 ,  B22F2201/30 ,  B22F2998/10 ,  C22C1/08 ,  C22C33/0285 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/58 ,  C23C8/02 ,  C23C8/22 ,  B22F3/101 ,  B22F2201/013 ,  B22F2201/20 ,  B22F3/225 ,  B22F3/1021

Abstract: This invention presents a sintered and carburized porous stainless steel part with improved strength and hardness and method thereof. The sintered and carburized porous stainless steel part has a porous body with a relative density between 30% and 89%, which is sintered from a stainless steel powder, wherein exposed pore surfaces inside the porous body are carburized without forming carbides and without using an activation process in advance. A carburized layer is formed and spread into the core of the sintered porous body. Thereby, the strength, surface hardness, and core hardness of the sintered body are significantly increased.

Abstract translation: 本发明提供一种具有改进的强度和硬度及其方法的烧结和渗碳多孔不锈钢部件。 烧结和渗碳的多孔不锈钢部件具有相对密度在30％至89％之间的多孔体，其由不锈钢粉末烧结，其中多孔体内部的暴露的孔表面渗碳而不形成碳化物并且不使用活化 提前处理。 渗碳层形成并扩散到烧结多孔体的芯中。 因此，烧结体的强度，表面硬度和芯硬度显着增加。