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1.发明公开
公开(公告)号：KR1020160087424A
公开(公告)日：2016-07-22
申请号：KR1020150005999
申请日：2015-01-13
Applicant: 포항공과대학교 산학협력단
Abstract: 본발명은분말야금의모재가되는입자의표면에모재에비해강도가낮은코팅층을형성함으로써, 성형체를제조할때 금형의마모, 공정압력, 공정시간등을크게줄일수 있어, 고밀도분말야금제품의생산성을높일수 있는것에관한것이다. 본발명에따른하모닉구조분말은, 내부코어와이 내부코어에비해기계적강도가낮은표면층으로이루어진입자를포함하는분말로, 상기표면층은상기분말의열처리에의해형성된것을특징으로한다.
Abstract translation: 用于粉末冶金的谐波结构粉末具有在作为粉末冶金基材的颗粒表面上形成的涂层，而涂层的强度低于基材。 因此，当制造成型物体时，磨损，加工压力和加工时间显着降低，从而可以提高高密度粉末冶金产品的生产率。 根据谐波结构，粉末是含有由内芯和具有比内芯低的机械强度的表面层组成的颗粒的粉末，其中通过粉末的热处理形成表面层。
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公开(公告)号：KR101476745B1
公开(公告)日：2014-12-29
申请号：KR1020130077719
申请日：2013-07-03
Applicant: 포항공과대학교 산학협력단
Abstract: The present invention relates to a method for scanning a powder surface by using a non-contact three-dimensional profiler and quantitatively evaluating a surface roughness value in view of powder characteristics based on the result. According to the present invention, powder surface roughness can be quantized with simplicity and reliability compared to the qualitative power shape analysis and specific surface area-based quantitative evaluation of the related art. Also, the present invention allows for three surface roughness quantizing methods in view of physical significance, and thus can facilitate the determination of an effect of the powder surface roughness on moldability and molding strength. The present invention includes (a) a step in which powder surface profile information is obtained by using the non-contact three-dimensional profiler; (b) a step in which a reference line is determined by drawing an oval in which the longer one is the long axis and the shorter one is the short axis between the width and height of the powder in view of the powder characteristics of roundness; and (c) a step in which the surface roughness is defined with a deviation with respect to the reference line.
Abstract translation: 本发明涉及一种通过使用非接触三维轮廓仪扫描粉末表面的方法，并且基于结果定量评估粉末特性方面的表面粗糙度值。 根据本发明，与现有技术的定性功率形状分析和比表面积定量评价相比，粉末表面粗糙度可以简单可靠地量化。 另外，鉴于物理意义，本发明允许三种表面粗糙度量化方法，从而可以有助于确定粉末表面粗糙度对成型性和成型强度的影响。 本发明包括（a）通过使用非接触三维轮廓仪获得粉末表面轮廓信息的步骤; （b）考虑到圆度的粉末特性，通过绘制其中较长的长轴的椭圆和粉末的宽度和高度之间的短轴是短轴来确定参考线的步骤; 和（c）表面粗糙度相对于参考线的偏差来定义的步骤。
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公开(公告)号：KR1020160079972A
公开(公告)日：2016-07-07
申请号：KR1020140190508
申请日：2014-12-26
Applicant: 포항공과대학교 산학협력단
Abstract: 본발명은분말성형공정때 필요한프레스의압력을줄이고금형의마모를줄여생산성을높이는동시에금형의수명을증가시킬수 있는분말야금용분말및 이를이용한분말성형방법에관한것이다. 본발명에따른분말은, 내부입자와이 내부입자의표면에코팅된코팅층을포함하여이루어진입자를포함하고, 상기코팅층은내부입자에비해기계적강도가낮은것을특징으로한다.
Abstract translation: 本发明涉及粉末冶金用粉末和使用其的粉末形成方法。 用于粉末冶金的粉末降低了粉末成形过程所需的压力的压力，减少了模具的磨损，提高了生产率，并提高了模具的耐久性。 根据本发明，粉末包括：内部颗粒; 以及具有涂覆在内部颗粒表面上的涂层的颗粒，其中涂层具有比内部颗粒更低的机械强度。
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