CN107010933A - 一种熔模铸件用型芯的浆料制备方法 - Google Patents

一种熔模铸件用型芯的浆料制备方法 Download PDF

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CN107010933A
CN107010933A CN201710214322.XA CN201710214322A CN107010933A CN 107010933 A CN107010933 A CN 107010933A CN 201710214322 A CN201710214322 A CN 201710214322A CN 107010933 A CN107010933 A CN 107010933A
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quartz glass
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鲁茂波
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Dfic Precision Casting Anhui Co Ltd
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    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract

本发明公开了一种熔模铸件用型芯的浆料制备方法，包括如下步骤：（1）将粉料和矿化剂置于球磨机内混磨＞2h，取出烘干，使水分含量低于质量分数0.3%；（2）将质量分数15%‑20%的增塑剂加入带搅拌器的不锈钢容器内，加热至85‑90℃，并在搅拌的情况下加入粉料和质量分数0.5‑1.0%的油酸，继续搅拌4‑5h，即可用于制芯或浇成锭块备用，本发明采用石英玻璃制成的型芯坯体，只需加热至1100℃以上就能烧结，矿化剂能促成烧结并兼有提高型芯高温抗变形能力、以及提高石英玻璃析晶率等作用，利用增塑剂用量对型芯的孔隙率、抗弯强度、体积密度和烧成收缩率等各项性能进行提高。

Description

一种熔模铸件用型芯的浆料制备方法
技术领域
本发明涉及熔模铸造技术领域，具体为一种熔模铸件用型芯的浆料制备方法。
背景技术
一般情况下熔模铸造的内腔是与外形一道通过涂挂涂料、撒砂等工序形成的，不用专制型芯。但当铸件内腔过于窄小或形状复杂，常规的涂挂涂料、撒砂等工序根本无法实施，或内腔型壳无法干燥硬化时，就必须使用预制的型芯来形成铸件内腔。这些型芯要等铸件铸成后再设法去除。例如航空发动机空心涡轮叶片，叶片的冷却通道迂回曲折，形若迷宫，就必须采用陶瓷型芯。
目前熔模铸造用的型芯按成形方法和工艺特点可分成几种，有热压注陶瓷型芯、传递成形陶瓷型芯、灌浆成形陶瓷型芯、水溶型芯、水玻璃砂型芯、替换粘结剂型芯、细管型芯等多种熔模铸造型芯。它们的脱芯方法和应用范围也各不相同。
但是对于熔模铸造用的型芯的浆料制备是型芯质量的重要因素，现有技术中的型芯强度偏低，必须将成型的型芯坯体加热至高温进行烧结，才能达到高性能，但陶瓷型芯与一般陶瓷制品不同，要求有一定孔隙率，强度也不宜过高。否则，不仅不易从铸件中清除，还会造成铸件热裂。
发明内容
为了克服现有技术方案的不足, 本发明提供一种熔模铸件用型芯的浆料制备方法，采用石英玻璃制成的型芯坯体，只需加热至1100℃以上就能烧结，矿化剂能促成烧结并兼有提高型芯高温抗变形能力、以及提高石英玻璃析晶率等作用，利用增塑剂用量对型芯的孔隙率、抗弯强度、体积密度和烧成收缩率等各项性能进行提高。
本发明解决其技术问题所采用的技术方案是：一种熔模铸件用型芯的浆料制备方法，包括如下步骤：
（1）将粉料和矿化剂置于球磨机内混磨＞2h，取出烘干，使水分含量低于质量分数0.3%；
（2）将质量分数15%-20%的增塑剂加入带搅拌器的不锈钢容器内，加热至85-90℃，并在搅拌的情况下加入粉料和质量分数0.5-1.0%的油酸，继续搅拌4-5h，即可用于制芯或浇成锭块备用。
优选的，所述粉料采用石英玻璃粉料，所述矿化剂包括三组：锆石粉、氧化铝和B2O3、氧化铝和Cr2O3。
优选的，所述石英玻璃粉料与三组矿化剂比例分别为：
石英玻璃粉料：锆石粉=80:20；
石英玻璃粉料：氧化铝：B2O3=85:14：1；
石英玻璃粉料：氧化铝：Cr2O3=90:5:5。
优选的，所述增塑剂采用石蜡、蜂蜡或硬脂酸。
与现有技术相比，本发明的有益效果是：本发明采用石英玻璃制成的型芯坯体，只需加热至1100℃以上就能烧结，矿化剂能促成烧结并兼有提高型芯高温抗变形能力、以及提高石英玻璃析晶率等作用，利用增塑剂用量对型芯的孔隙率、抗弯强度、体积密度和烧成收缩率等各项性能进行提高。
具体实施方式
下面将结合本发明实施例中，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例：
本发明提供了一种具体技术方案：一种熔模铸件用型芯的浆料制备方法，包括如下步骤：
（1）将粉料和矿化剂置于球磨机内混磨＞2h，取出烘干，使水分含量低于质量分数0.3%；
（2）将质量分数15%-20%的增塑剂加入带搅拌器的不锈钢容器内，加热至85-90℃，并在搅拌的情况下加入粉料和质量分数0.5-1.0%的油酸，继续搅拌4-5h，即可用于制芯或浇成锭块备用。
所述粉料采用石英玻璃粉料，所述矿化剂包括三组：锆石粉、氧化铝和B2O3、氧化铝和Cr2O3。
所述石英玻璃粉料与三组矿化剂比例分别为：
石英玻璃粉料：锆石粉=80:20；
石英玻璃粉料：氧化铝：B2O3=85:14：1；
石英玻璃粉料：氧化铝：Cr2O3=90:5:5。
所述增塑剂采用石蜡、蜂蜡或硬脂酸。
本发明采用石英玻璃制成的型芯坯体，只需加热至1100℃以上就能烧结，矿化剂能促成烧结并兼有提高型芯高温抗变形能力、以及提高石英玻璃析晶率等作用，利用增塑剂用量对型芯的孔隙率、抗弯强度、体积密度和烧成收缩率等各项性能进行提高。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。不应将权利要求中的任何标记视为限制所涉及的权利要求。

Claims (4)

1.一种熔模铸件用型芯的浆料制备方法，其特征在于：包括如下步骤：
（1）将粉料和矿化剂置于球磨机内混磨＞2h，取出烘干，使水分含量低于质量分数0.3%；
（2）将质量分数15%-20%的增塑剂加入带搅拌器的不锈钢容器内，加热至85-90℃，并在搅拌的情况下加入粉料和质量分数0.5-1.0%的油酸，继续搅拌4-5h，即可用于制芯或浇成锭块备用。
2.根据权利要求1所述的一种熔模铸件用型芯的浆料制备方法，其特征在于：所述粉料采用石英玻璃粉料，所述矿化剂包括三组：锆石粉、氧化铝和B2O3、氧化铝和Cr2O3。
3.根据权利要求1所述的一种熔模铸件用型芯的浆料制备方法，其特征在于：所述石英玻璃粉料与三组矿化剂比例分别为：
石英玻璃粉料：锆石粉=80:20；
石英玻璃粉料：氧化铝：B2O3=85:14：1；
石英玻璃粉料：氧化铝：Cr2O3=90:5:5。
4.根据权利要求1所述的一种熔模铸件用型芯的浆料制备方法，其特征在于，所述增塑剂采用石蜡、蜂蜡或硬脂酸。
CN201710214322.XA 2017-04-01 2017-04-01 一种熔模铸件用型芯的浆料制备方法 Pending CN107010933A (zh)

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CN107876691A (zh) * 2017-10-12 2018-04-06 东风精密铸造安徽有限公司 一种熔模铸件用型芯材料及其制备方法
CN112592177A (zh) * 2020-12-21 2021-04-02 安徽应流航源动力科技有限公司 一种航空发动机用空心叶片陶瓷型芯矿化剂的制备方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107876691A (zh) * 2017-10-12 2018-04-06 东风精密铸造安徽有限公司 一种熔模铸件用型芯材料及其制备方法
CN112592177A (zh) * 2020-12-21 2021-04-02 安徽应流航源动力科技有限公司 一种航空发动机用空心叶片陶瓷型芯矿化剂的制备方法

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