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CN105921744A - 一种金属打印抑制剂 - Google Patents

一种金属打印抑制剂 Download PDF

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Publication number
CN105921744A
CN105921744A CN201610294340.9A CN201610294340A CN105921744A CN 105921744 A CN105921744 A CN 105921744A CN 201610294340 A CN201610294340 A CN 201610294340A CN 105921744 A CN105921744 A CN 105921744A
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Prior art keywords
inhibitor
parts
sintering
metal printing
powder
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CN105921744B (zh
Inventor
张靖
金良
黄少威
包海峰
叶宇柔
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Guangdong Sprintray 3d Printing Technology Co ltd
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Guangdong Sprintray 3d Printing Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10Sintering only
    • B22F3/1003Use of special medium during sintering, e.g. sintering aid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00Materials specially adapted for additive manufacturing

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

一种金属打印抑制剂,由下列质量份数的组份组成:硝酸镁35‑45份,氯化镁0‑15份,水55‑65份。本发明的用途是:采用喷头将本发明制备的金属打印抑制剂喷射在金属粉末上,在烧结的过程中抑制该抑制剂溶液影响到区域的烧结。

Description

一种金属打印抑制剂
技术领域
本发明涉及3D打印技术领域,尤其是一种金属打印抑制剂。
背景技术
选择性抑制烧结技术分为两个过程:成形过程和烧结过程。金属打印的原材料为金属粉末,采用逐层铺粉的方式堆叠成形。
成形过程:抑制剂的溶液被选择性的逐层喷射在零件的轮廓之上,描画图形的轮廓。
烧结过程:坯件被送入烧结炉烧结,抑制剂作用成分在这个过程中产生抑制作用,未喷洒抑制剂的区域粉末会被完全烧结。逐层打印完成后,多余的粉末被去除,打印的坯件被送入烧结炉烧结。
不同粉末的烧结温度不同,从铜合金大约800 到不锈钢大约1200的烧结温度。选择的抑制剂的作用成分如果有很高的烧结温度,那么这种抑制剂就可以用于更多的金属粉末材料的烧结抑制。如果单位体积的溶液能够产生更多的抑制作用成分,那么这种作用成分可以更全面的覆盖在粉末的表面,从而抑制作用也会更有效。
发明内容
本发明的目的是提供一种具有高溶解度、抑制作用成分具有高烧结温度的金属烧结的抑制剂,特别是用于选择性抑制烧结过程。
为实现上述目的,本发明所采用的技术方案是:
一种金属打印抑制剂,由下列质量份数的组份组成:
硝酸镁35-45 份,氯化镁0-15份,水 55-65份。
上述金属打印抑制剂的制备方法是: 0-15份氯化镁,35-45份硝酸镁, 55-65份水,形成盐水混合物,即为金属打印抑制剂。
本发明的用途是:采用喷头将本发明制备的金属打印抑制剂喷射在金属粉末上,在烧结的过程中抑制该抑制剂溶液影响到区域的烧结。
本发明的反应机理是:
抑制剂一开始是以液体的形式存在的,在打印模型时,将抑制剂喷射到物体表面粘接起来,等模型打印完成后放到高温炉里面进行烧结,烧结过程中,抑制剂分解产生的抑制作用成分为氧化镁,而氧化镁的熔点为2852,具有很高的烧结温度;两种盐具有高溶解度,因而在烧结的过程中会产生足够的氧化镁颗粒以覆盖在粉末的表面,从而阻止区域粉末的烧结。
附图说明
附图1为附着于H13粉末表面的氧化镁的示意图。
具体实施方式
下面给出若干实施例对本发明作进一步的详细说明:
实施例1:
采用H13工具钢粉末,粉末颗粒度为45微米,
取50g Mg(NO3)2·6H2O的盐溶于100g去离子水中,添加入合适的表面活性剂,形成混合溶液;
将该溶液逐层喷印在H13工具钢粉末层,喷印的区域为零件的轮廓线,层厚为100微米。
将打印的零件移入真空烧结炉烧结,烧结的温度设定为:
25~800, 升温速率为10/分钟
800~1200,升温速率为5/分钟
1200保温60分钟
1200到800,降温速率为10/分钟
800~400,降温速率为20/分钟
而后随炉冷却。
实验表明在喷射了抑制剂的区域粉末烧结被有效抑制,SEM观察的结果如附图1所示。

Claims (1)

1.一种金属打印抑制剂,其特征在于,由下列质量份数的组份组成:
硝酸镁35-45 份,氯化镁0-15份,水 55-65份。
CN201610294340.9A 2016-05-03 2016-05-03 一种金属打印抑制剂 Active CN105921744B (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107755693A (zh) * 2017-11-03 2018-03-06 广东智维立体成型科技有限公司 金属3d打印系统
WO2019085227A1 (zh) * 2017-11-03 2019-05-09 广东智维立体成型科技有限公司 金属3d打印装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1671503A (zh) * 2002-07-23 2005-09-21 南加利福尼亚大学 使用选择性抑制烧结(sis)的金属零件制造
CN1741895A (zh) * 2002-12-20 2006-03-01 南加利福尼亚大学 在选择性抑制烧结(sis)工艺中减少粉末废料的方法
US20090142217A1 (en) * 2007-12-03 2009-06-04 General Electric Company Composition and method
CN102409167A (zh) * 2010-09-26 2012-04-11 鞍钢股份有限公司 一种烧结矿粉化抑制剂及其添加方法
CN102407483A (zh) * 2011-11-14 2012-04-11 大连理工大学 一种半导体晶圆高效纳米精度减薄方法
US20140271961A1 (en) * 2013-03-12 2014-09-18 University Of Southern California Inserting inhibitor to create part boundary isolation during 3d printing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1671503A (zh) * 2002-07-23 2005-09-21 南加利福尼亚大学 使用选择性抑制烧结(sis)的金属零件制造
CN1741895A (zh) * 2002-12-20 2006-03-01 南加利福尼亚大学 在选择性抑制烧结(sis)工艺中减少粉末废料的方法
US20090142217A1 (en) * 2007-12-03 2009-06-04 General Electric Company Composition and method
CN102409167A (zh) * 2010-09-26 2012-04-11 鞍钢股份有限公司 一种烧结矿粉化抑制剂及其添加方法
CN102407483A (zh) * 2011-11-14 2012-04-11 大连理工大学 一种半导体晶圆高效纳米精度减薄方法
US20140271961A1 (en) * 2013-03-12 2014-09-18 University Of Southern California Inserting inhibitor to create part boundary isolation during 3d printing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107755693A (zh) * 2017-11-03 2018-03-06 广东智维立体成型科技有限公司 金属3d打印系统
WO2019085227A1 (zh) * 2017-11-03 2019-05-09 广东智维立体成型科技有限公司 金属3d打印装置

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