CN113897578A - 一种外科手术器械金属的表面改性方法 - Google Patents
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Abstract
本发明涉及一种外科手术器械金属的表面改性方法,针对医用止血钳不同区域对应不同的性能需求,本发明首次提出了对不同需求的部位进行不同的改性处理,即先选用气体渗氮处理方式对医用止血钳进行初步的性能优化,然后对耐磨性能要求高的棘齿处通过磁控溅射形成TiN耐磨层,通过调节溅射过程中的氮气流量得到令人满意的耐磨层。值得一提的是,制备TiN耐磨层时需要遮蔽棘齿以外的区域,这样才能达到特定区域特殊处理的目的。在制备TiN层后,棘齿处的耐磨性能显著提高,进而有利于提高止血钳使用过程中的夹持稳定性。
Description
技术领域
本发明涉及表面改性领域,具体涉及一种外科手术器械金属的表面改性方法。
背景技术
止血钳是一种常用的外科手术器械,其用以止血(钳夹血管或止血点),也可用以分离组织,牵引缝线和结扎线,夹持组织等。止血钳主要有直止血钳、弯止血钳和蚊式钳三种。直止血钳有长、短之分,用于浅部和皮下止血。弯止血钳也有长、短之分,一般用于深部或肌肉断端的止血。蚊式止血钳构造细小,用于精细手术的止血,如面部血管,或用以夹持牵引线和支持线。
不锈钢是止血钳常见的制造材料之一,由于不锈钢的耐腐蚀性能和硬度等性能较差,通过需要对不锈钢进行表面改性,如表面渗氮处理。止血钳不同部位对应着不同的性能需求,如钳刃处受到啮合力和剪切力的作用,通常需要优化其断裂韧性,而棘齿处由于长时间磨损会导致夹持失稳,所以,通常需要优化其耐磨性能。然而,现有技术通常仅选用一种表面改性方法处理止血钳,这导致无法使止血钳的各个位置的性能都得到满意地提升。因此,如何对止血钳的不同区域进行针对性的性能优化是当下急需解决的问题。
发明内容
针对现有技术存在的问题,本发明旨在提供一种外科手术器械金属的表面改性方法,该方法可以获得一种性能优异的医用止血钳。
一种外科手术器械金属的表面改性方法,包括以下步骤:
A.基材准备:将不锈钢制作成止血钳;
B.基材预处理:止血钳先后经过打磨、抛光、酸洗、除油、清洗并烘干;
C.制备渗氮层:将烘干后的止血钳放入气体渗氮炉中,通入氨分解气进行气体渗氮处理,渗氮时先将温度升至550-600℃,升温速率15-18℃/min,然后保温12-14h后随炉冷却;
D.溅射TiN耐磨层:选用掩模将止血钳棘齿之外的部分遮蔽,将止血钳放入磁控溅射镀膜机中,选用金属钛靶为溅射源,在氮气和氩气混合气氛中溅射形成TiN耐磨层,其中,本底真空度小于1*10-3Pa,溅射压力为1-5Pa,溅射温度200-220℃,溅射时间30-45min,气体总流量100-120sccm;
E.热处理:将止血钳放入真空退火炉中进行热处理,热处理温度为350-380℃,热处理时间4-5h,然后随炉冷却至室温。
进一步地,所述不锈钢为2Cr13不锈钢或2Cr13Mo不锈钢。
进一步地,所述酸洗选用15%的HCl溶液。
进一步地,所述除油选用10%的NaHCO3溶液。
进一步地,所述清洗选用去离子水。
进一步地,氮气和氩气的流量比为2/3-3。
优选地,氮气和氩气的流量比为3。
针对医用止血钳不同区域对应不同的性能需求,本发明首次提出了对不同需求的部位进行不同的改性处理,即先选用气体渗氮处理方式对医用止血钳进行初步的性能优化,然后对耐磨性能要求高的棘齿处通过磁控溅射形成TiN耐磨层,通过调节溅射过程中的氮气流量得到令人满意的耐磨层。值得一提的是,制备TiN耐磨层时需要遮蔽棘齿以外的区域,这样才能达到特定区域特殊处理的目的。在制备TiN层后,棘齿处的耐磨性能显著提高,进而有利于提高止血钳使用过程中的夹持稳定性。
具体实施方式
下面通过具体实施例来验证本发明的技术效果,但是本发明的实施方式不局限于此。
实施例1
A.基材准备:将2Cr13Mo不锈钢制作成止血钳;
B.基材预处理:止血钳先后经过打磨、抛光、酸洗、除油、清洗并烘干,其中酸洗选用15%的HCl溶液,除油选用10%的NaHCO3溶液,清洗选用去离子水;
C.制备渗氮层:将烘干后的止血钳放入气体渗氮炉中,通入氨分解气进行气体渗氮处理,渗氮时先将温度升至600℃,升温速率15℃/min,然后保温12h后随炉冷却;
D.溅射TiN耐磨层:选用掩模将止血钳棘齿之外的部分遮蔽,将止血钳放入磁控溅射镀膜机中,选用金属钛靶为溅射源,在氮气和氩气混合气氛中溅射形成TiN耐磨层,其中,本底真空度为1*10-3Pa,溅射压力为5Pa,溅射温度200℃,溅射时间30min,气体总流量100sccm,氮气和氩气的流量比为3∶1;
E.热处理:将止血钳放入真空退火炉中进行热处理,热处理温度为350℃,热处理时间4h,然后随炉冷却至室温。
实施例2
A.基材准备:将2Cr13Mo不锈钢制作成止血钳;
B.基材预处理:止血钳先后经过打磨、抛光、酸洗、除油、清洗并烘干,其中酸洗选用15%的HCl溶液,除油选用10%的NaHCO3溶液,清洗选用去离子水;
C.制备渗氮层:将烘干后的止血钳放入气体渗氮炉中,通入氨分解气进行气体渗氮处理,渗氮时先将温度升至600℃,升温速率15℃/min,然后保温12h后随炉冷却;
D.溅射TiN耐磨层:选用掩模将止血钳棘齿之外的部分遮蔽,将止血钳放入磁控溅射镀膜机中,选用金属钛靶为溅射源,在氮气和氩气混合气氛中溅射形成TiN耐磨层,其中,本底真空度为1*10-3Pa,溅射压力为5Pa,溅射温度200℃,溅射时间30min,气体总流量100sccm,氮气和氩气的流量比为3∶2;
E.热处理:将止血钳放入真空退火炉中进行热处理,热处理温度为350℃,热处理时间4h,然后随炉冷却至室温。
实施例3
A.基材准备:将2Cr13Mo不锈钢制作成止血钳;
B.基材预处理:止血钳先后经过打磨、抛光、酸洗、除油、清洗并烘干,其中酸洗选用15%的HCl溶液,除油选用10%的NaHCO3溶液,清洗选用去离子水;
C.制备渗氮层:将烘干后的止血钳放入气体渗氮炉中,通入氨分解气进行气体渗氮处理,渗氮时先将温度升至600℃,升温速率15℃/min,然后保温12h后随炉冷却;
D.溅射TiN耐磨层:选用掩模将止血钳棘齿之外的部分遮蔽,将止血钳放入磁控溅射镀膜机中,选用金属钛靶为溅射源,在氮气和氩气混合气氛中溅射形成TiN耐磨层,其中,本底真空度为1*10-3Pa,溅射压力为5Pa,溅射温度200℃,溅射时间30min,气体总流量100sccm,氮气和氩气的流量比为1∶1;
E.热处理:将止血钳放入真空退火炉中进行热处理,热处理温度为350℃,热处理时间4h,然后随炉冷却至室温。
实施例4
A.基材准备:将2Cr13Mo不锈钢制作成止血钳;
B.基材预处理:止血钳先后经过打磨、抛光、酸洗、除油、清洗并烘干,其中酸洗选用15%的HCl溶液,除油选用10%的NaHCO3溶液,清洗选用去离子水;
C.制备渗氮层:将烘干后的止血钳放入气体渗氮炉中,通入氨分解气进行气体渗氮处理,渗氮时先将温度升至600℃,升温速率15℃/min,然后保温12h后随炉冷却;
D.溅射TiN耐磨层:选用掩模将止血钳棘齿之外的部分遮蔽,将止血钳放入磁控溅射镀膜机中,选用金属钛靶为溅射源,在氮气和氩气混合气氛中溅射形成TiN耐磨层,其中,本底真空度为1*10-3Pa,溅射压力为5Pa,溅射温度200℃,溅射时间30min,气体总流量100sccm,氮气和氩气的流量比为2∶3;
E.热处理:将止血钳放入真空退火炉中进行热处理,热处理温度为350℃,热处理时间4h,然后随炉冷却至室温。
对比例1
A.基材准备:将2Cr13Mo不锈钢制作成止血钳;
B.基材预处理:止血钳先后经过打磨、抛光、酸洗、除油、清洗并烘干,其中酸洗选用15%的HCl溶液,除油选用10%的NaHCO3溶液,清洗选用去离子水;
C.制备渗氮层:将烘干后的止血钳放入气体渗氮炉中,通入氨分解气进行气体渗氮处理,渗氮时先将温度升至600℃,升温速率15℃/min,然后保温12h后随炉冷却;
D.溅射TiN耐磨层:选用掩模将止血钳棘齿之外的部分遮蔽,将止血钳放入磁控溅射镀膜机中,选用金属钛靶为溅射源,在氮气和氩气混合气氛中溅射形成TiN耐磨层,其中,本底真空度为1*10-3Pa,溅射压力为5Pa,溅射温度200℃,溅射时间30min,气体总流量100sccm,氮气和氩气的流量比为9∶1;
E.热处理:将止血钳放入真空退火炉中进行热处理,热处理温度为350℃,热处理时间4h,然后随炉冷却至室温。
对比例2
A.基材准备:将2Cr13Mo不锈钢制作成止血钳;
B.基材预处理:止血钳先后经过打磨、抛光、酸洗、除油、清洗并烘干,其中酸洗选用15%的HCl溶液,除油选用10%的NaHCO3溶液,清洗选用去离子水;
C.制备渗氮层:将烘干后的止血钳放入气体渗氮炉中,通入氨分解气进行气体渗氮处理,渗氮时先将温度升至600℃,升温速率15℃/min,然后保温12h后随炉冷却;
D.溅射TiN耐磨层:选用掩模将止血钳棘齿之外的部分遮蔽,将止血钳放入磁控溅射镀膜机中,选用金属钛靶为溅射源,在氮气和氩气混合气氛中溅射形成TiN耐磨层,其中,本底真空度为1*10-3Pa,溅射压力为5Pa,溅射温度200℃,溅射时间30min,气体总流量100sccm,氮气和氩气的流量比为1∶3;
E.热处理:将止血钳放入真空退火炉中进行热处理,热处理温度为350℃,热处理时间4h,然后随炉冷却至室温。
以下,我们采用CETR-3型摩擦磨损试验机评价实施例1-4以及对比例1-2的止血钳的耐磨性能(选用仅经过渗氮处理的止血钳作为空白组),载荷为5N,摩擦副为直径5mm的GCr15钢球,摩擦频率为8Hz,摩擦行程3mm,摩擦时间60min,并用电子天平称量磨损前后的质量以计算磨损量,各组实验结果如表1所述。
表1各试验样品的磨损量
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变型,这些改进和变型也应视为本发明的保护范围。
Claims (7)
1.一种外科手术器械金属的表面改性方法,其特征在于,包括以下步骤:
A.基材准备:将不锈钢制作成止血钳;
B.基材预处理:止血钳先后经过打磨、抛光、酸洗、除油、清洗并烘干;
C.制备渗氮层:将烘干后的止血钳放入气体渗氮炉中,通入氨分解气进行气体渗氮处理,渗氮时先将温度升至550-600℃,升温速率15-18℃/min,然后保温12-14h后随炉冷却;
D.溅射TiN耐磨层:选用掩模将止血钳棘齿之外的部分遮蔽,将止血钳放入磁控溅射镀膜机中,选用金属钛靶为溅射源,在氮气和氩气混合气氛中溅射形成TiN耐磨层,其中,本底真空度小于1*10-3Pa,溅射压力为1-5Pa,溅射温度200-220℃,溅射时间30-45min,气体总流量100-120sccm;
E.热处理:将止血钳放入真空退火炉中进行热处理,热处理温度为350-380℃,热处理时间4-5h,然后随炉冷却至室温。
2.一种如权利要求1所述的制备方法,其特征在于:所述不锈钢为2Cr13不锈钢或2Cr13Mo不锈钢。
3.一种如权利要求1-2所述的制备方法,其特征在于:所述酸洗选用15%的HCl溶液。
4.一种如权利要求1所述的制备方法,其特征在于:所述除油选用10%的NaHCO3溶液。
5.一种如权利要求1所述的制备方法,其特征在于:所述清洗选用去离子水。
6.一种如权利要求1所述的制备方法,其特征在于:氮气和氩气的流量比为2/3-3。
7.一种如权利要求6所述的制备方法,其特征在于:氮气和氩气的流量比为3。
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