CN105908154B - 一种用于制备金刚石线锯的二氧化钛溶胶及其应用 - Google Patents
一种用于制备金刚石线锯的二氧化钛溶胶及其应用 Download PDFInfo
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Abstract
本发明属于切割用线锯的制备领域,特别涉及一种用于制备金刚石线锯的二氧化钛溶胶及其应用。本发明采用工艺简便的溶胶凝胶法制备了一种把持力较高的金刚石线锯,首先对钢丝进行除油除锈以及粗化处理,然后将配好的金刚石溶胶液均匀涂覆于经前处理过的钢丝上,氧化钛溶胶在钢丝上成膜为凝胶,经高温烧结后,金刚石很好地负载在钢丝上;通过氧化钛膜对金刚石的把持力,制得了牢固的金刚石线锯。
Description
技术领域
本发明属于切割用线锯的制备领域,特别涉及一种用于制备金刚石线锯的二氧化钛溶胶及其应用。
背景技术
传统的材料切割加工主要采用圆片锯,包括外圆切割机和内圆切割机等,随着材料尺寸的增大,常规的圆片锯无法加工,因此目前普遍采用游离磨料线锯进行切割加工。它具有能切割大直径材料,切割质量稳定,不会出现崩边,切缝窄,锯口损失小,可进行多线切割,切割片厚一致性好,切片量大和切片成本低等优点。但也存在如下缺点,如工作区域污染严重,切割后产生的浆液需要处理后才能排放,磨浆消耗大,磨料成本高,加工时间长,对于硬度很高的材料,加工难度非常大,切片厚度调整困难等。
虽然,目前游离磨料金刚石线锯存在一系列问题,但这种切割技术在单晶硅等半导体材料切割中仍占据了主导地位。
为了解决游离磨料金刚石线锯所存在的问题,人们将金刚石磨料以一定的方式固定到金属线上,从而产生了固结磨料金刚石线锯。相比于游离磨料线锯,它具有如下优点:切缝窄,锯口损失小,切片质量好,切割效率高,避免了游离磨料中浆液的污染,锯丝磨损小,使用寿命长等优点。目前常用的固结磨料锯丝制造方法主要有钎焊法、机械碾压法、树脂粘结法和复合电镀法。
钎焊法是指采用钎焊的方法实现金刚石、结合剂和基体三者之间的化学冶金结合,涂层与基体之间具有较高的结合强度。该方法制备的线锯具有切割寿命长,切割效率高的优点,但是,由于钎焊温度较高,容易造成基体变质而降低其刚性甚至造成基体断裂。不仅如此,在高温下金刚石微粉会产生石墨化的现象,造成磨料软化变质。
机械碾压法是直接将金刚石磨粒通过机械作用,滚压或者冲压到钢丝基体中。此种方法很难生产出较长的线锯,而且线径分布不均匀。基体对金刚石磨粒的把持力也比较小,磨粒容易脱落。
树脂粘结法所用结合剂为热固性树脂,在线锯过程中需要加热和烧结,但结合剂对金刚石微粉的把持力不如钎焊方法。
电镀金刚石线锯丝通常采用镍为金属结合剂,将金刚石磨粒电镀在钢丝上。它具有磨粒把持强度高,耐磨性和耐热性好等特点,已经在工程实际中获得一定的应用。但是,电镀工序非常耗时,扭曲断裂强度和弯曲强度非常低,在切割过程中线锯很容易失效。
发明内容
从上述各项制造固结磨料金刚石线锯的方法可知,树脂粘结法的制造工艺较为简单,但是该工艺所制备的金刚石线锯对金刚石的把持力不够,所以研究开发对金刚石把持力高,工艺简便的制备金刚石线锯的方法为人们所关注,本发明采用溶胶-凝胶的方法,制备了对金刚石具有高把持力的线锯。
首先,本发明提供了一种用于制备金刚石线锯的二氧化钛溶胶,由钛酸丁酯、乙醇、乙酸、水和溶质质量分数为65%的浓硝酸所组成,其体积比为20:80:4:2:1;
将上述各组分按体积比混合均匀,即得到二氧化钛溶胶。
本发明还提供了一种上述二氧化钛溶胶的应用,即采用该溶胶制备金刚石线锯,具体步骤为:
(1)对钢丝进行除油、除锈、粗化处理,
除油、除锈处理采用通用的方法,即采用氢氧化钠和硅酸钠的混合溶液或表面活性剂溶液作为除油溶液对钢丝进行除油,使用盐酸水溶液对钢丝进行除锈,
为了获得对金刚石高把持力的线锯,需要对钢丝进一步作粗化处理,钢丝的粗化处理溶液由重铬酸钠、浓硫酸和蒸馏水组成,其比例可按需要进行调整;
(2)将金刚石粉体充分分散于上述二氧化钛溶胶中,制得金刚石溶胶液,
金刚石粉体在溶胶液中的浓度为0.1-20g/L,金刚石粉体浓度低于0.1g/L时,涂覆于钢丝线上的金刚石过少,影响金刚石线锯对材料的切割效果;金刚石粉体浓度大于20g/L时,金刚石粉体很难在溶胶液中均匀分散,同时制备的钢丝线上的金刚石颗粒团聚,影响切割效果,金刚石粉体在溶胶液中的最佳浓度为1-10g/L;
(3)将步骤(2)得到的金刚石溶胶液均匀涂覆于经过步骤(1)处理的钢丝上,干燥使溶胶在钢丝上成膜为凝胶,再经高温烧结后,在钢丝表面形成氧化钛膜中嵌有金刚石的线锯,
本发明的有益效果为:本发明采用工艺简便的溶胶凝胶法制备了一种把持力较高的金刚石线锯,首先对钢丝进行除油除锈以及粗化处理,然后将配好的金刚石溶胶液均匀涂覆于经前处理过的钢丝上,氧化钛溶胶在钢丝上成膜为凝胶,经高温烧结后,金刚石很好地负载在钢丝上;通过氧化钛膜对金刚石的把持力,制得了牢固的金刚石线锯。
具体实施方式
实施例1
(1)将直径为0.5mm的不锈钢丝线进行除油、除锈、粗化处理;
(2)制备溶胶,溶胶为钛酸丁酯、乙醇、乙酸、水和溶质质量分数为65%的浓硝酸所组成,其体积比为20:80:4:2:1,将各组分混合搅拌均匀,再将0.1g的金刚石粉体充分分散于1L上述溶胶中得到金刚石溶胶液;
(3)将步骤(2)中得到的金刚石溶胶液涂覆于经过步骤(1)前处理的不锈钢丝线上,经60℃、2分钟烘干后,再经过600℃、15分钟的烧结处理,即得到金刚石线锯。
为了评价线锯对金刚石的把持力,采用对折摩擦法进行评价,即将金刚石线锯对折后套在直径为2cm的不锈钢棒上,拉直状态下往复拉动5次,金刚石粉体无脱落的表述为“良好”,金刚石粉体有脱落的表述为“差”(下同)。
本实施例中的检测结果为“良好”。
实施例2
(1)将直径为0.5mm的不锈钢丝线进行除油、除锈、粗化处理;
(2)制备溶胶,溶胶为钛酸丁酯、乙醇、乙酸、水和溶质质量分数为65%的浓硝酸所组成,其体积比为20:80:4:2:1,将各组分混合搅拌均匀,再将1g的金刚石粉体充分分散于1L上述溶胶中得到金刚石溶胶液;
(3)将步骤(2)中得到的金刚石溶胶液涂覆于经过步骤(1)前处理的不锈钢丝线上,经60℃、2分钟烘干后,再经过600℃、15分钟的烧结处理,即得到金刚石线锯。
为了评价线锯对金刚石的把持力,采用对折摩擦法对本实施例制备的线锯进行检测,检测结果为“良好”。
实施例3
(1)将直径为0.5mm的不锈钢丝线进行除油、除锈、粗化处理;
(2)制备溶胶,溶胶为钛酸丁酯、乙醇、乙酸、水和溶质质量分数为65%的浓硝酸所组成,其体积比为20:80:4:2:1,将各组分混合搅拌均匀,再将10g的金刚石粉体充分分散于1L上述溶胶中得到金刚石溶胶液;
(3)将步骤(2)中得到的金刚石溶胶液涂覆于经过步骤(1)前处理的不锈钢丝线上,经60℃、2分钟烘干后,再经过600℃、15分钟的烧结处理,即得到金刚石线锯。
为了评价线锯对金刚石的把持力,采用对折摩擦法对本实施例制备的线锯进行检测,检测结果为“良好”。
实施例4
(1)将直径为0.5mm的不锈钢丝线进行除油、除锈、粗化处理;
(2)制备溶胶,溶胶为钛酸丁酯、乙醇、乙酸、水和溶质质量分数为65%的浓硝酸所组成,其体积比为20:80:4:2:1,将各组分混合搅拌均匀,再将20g的金刚石粉体充分分散于1L上述溶胶中得到金刚石溶胶液;
(3)将步骤(2)中得到的金刚石溶胶液涂覆于经过步骤(1)前处理的不锈钢丝线上,经60℃、2分钟烘干后,再经过600℃、15分钟的烧结处理,即得到金刚石线锯。
为了评价线锯对金刚石的把持力,采用对折摩擦法对本实施例制备的线锯进行检测,检测结果为“良好”。
对比实施例1
(1)将直径为0.5mm的不锈钢丝线仅仅进行除油、除锈处理,而未进行任何粗化处理;
(2)制备溶胶,溶胶为钛酸丁酯、乙醇、乙酸、水和溶质质量分数为65%的浓硝酸所组成,其体积比为20:80:4:2:1,将各组分混合搅拌均匀,再将10g的金刚石粉体充分分散于1L上述溶胶中得到金刚石溶胶液;
(3)将步骤(2)中得到的金刚石溶胶液涂覆于经过步骤(1)前处理的不锈钢丝线上(涂覆厚度同实施例3),经60℃、2分钟烘干后,再经过600℃、15分钟的烧结处理,即得到金刚石线锯。
为了评价线锯对金刚石的把持力,采用对折摩擦法对本实施例制备的线锯进行检测,检测结果为“差”。
Claims (6)
1.一种用于制备金刚石线锯的二氧化钛溶胶的应用,其特征在于:所述的二氧化钛溶胶由钛酸丁酯、乙醇、乙酸、水和硝酸组成;
所述应用为采用所述二氧化钛溶胶制备金刚石线锯,具体步骤为,
(1)对钢丝进行除油、除锈、粗化处理;
(2)将金刚石粉体充分分散于上述二氧化钛溶胶中,制得金刚石溶胶液;
(3)将步骤(2)得到的金刚石溶胶液均匀涂覆于经过步骤(1)处理的钢丝上,干燥,再经高温烧结后,在钢丝表面形成氧化钛膜中嵌有金刚石的线锯。
2.如权利要求1所述的二氧化钛溶胶的应用,其特征在于:步骤(1)中,采用氢氧化钠和硅酸钠的混合溶液或表面活性剂溶液作为除油溶液对钢丝进行除油。
3.如权利要求1所述的二氧化钛溶胶的应用,其特征在于:步骤(1)中,使用盐酸水溶液对钢丝进行除锈。
4.如权利要求1所述的二氧化钛溶胶的应用,其特征在于:步骤(1)中,采用由重铬酸钠、浓硫酸和蒸馏水组成的溶液对钢丝进行粗化处理。
5.如权利要求1所述的二氧化钛溶胶的应用,其特征在于:步骤(2)中,金刚石粉体在所述溶胶液中的浓度为0.1-20g/L。
6.如权利要求1所述的二氧化钛溶胶的应用,其特征在于:步骤(2)中,金刚石粉体在所述溶胶液中的浓度为1-10g/L。
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CN102027101A (zh) * | 2008-04-24 | 2011-04-20 | Ppt研究公司 | 稳定的水性浆料悬浮体 |
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CN102027100A (zh) * | 2008-04-28 | 2011-04-20 | Ppt研究公司 | 线切割设备用的切割和润滑组合物 |
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