CN106119721A - 一种耐老化复合涂层内燃机用活塞环的制备方法 - Google Patents
一种耐老化复合涂层内燃机用活塞环的制备方法 Download PDFInfo
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Abstract
本发明公开了一种耐老化复合涂层内燃机用活塞环的制备方法,该方法的具体步骤包括活塞环基体准备、涂层材料制备以及通过大气等离子技术在基体表面施加涂层,其中活塞环基体的各化学成分的重量百分比如下:C:0.3‑0.5%,Mn:0.3‑0.5%,Zr:0.3‑0.5%,Ti:0.5‑1%,Ta:0.1‑0.15%,Re:0.05‑0.1%,La:0.05‑0.1%,余量为Fe。本发明的活塞环既具有高耐磨、高耐损伤性能,同时涂层与基体结合强度高、不易发生涂层剥落,同时耐老化性能好,耐用性强,使用寿命长。
Description
技术领域
本发明涉及一种活塞环的制备方法,尤其涉及一种耐老化复合涂层内燃机用活塞环的制备方法。
背景技术
活塞环是内燃发动机的关键部件之一,是具有一定弹性的开口环,分为气环和油环,起着密封高温高压燃气、调整气缸壁润滑油膜、传递活塞热量和支撑活塞的作用。活塞环的运动工况复杂,且经常处于恶劣的工作环境中,需要具有良好的耐磨性、耐蚀性和力学性能。随着发动机向高效率、高载荷、高速度及高寿命的方向发展,对活塞环的耐久性和可靠性也提出了更高的要求。
现在的活塞环材料大多数是球墨铸铁和钢材,其耐磨性、耐损伤性较差,因此需要进行表面处理。目前的表面处理技术主要有镀铬、氮化、PVD与CVD镀膜、喷钼、喷涂陶瓷层等。CN201310116281采用大气等离子技术在活塞环表面喷涂陶瓷复合涂层,从而提高了活塞环的耐磨性。然而,这种方法存在涂层与基体结合强度不够,容易发生剥落的问题,在实际应用中需要改进。
发明内容
本发明目的就是为了弥补已有技术的缺陷,提供一种高耐磨、高耐损伤、同时涂层与基体结合强度高、不易发生涂层剥落、使用寿命长的耐老化复合涂层内燃机用活塞环的制备方法。
本发明是通过以下技术方案实现的:
一种耐老化复合涂层内燃机用活塞环的制备方法,其特征在于,该方法包括以下具体步骤:
(1)铸造活塞环基体,所述活塞环基体的各化学成分的重量百分比如下:C:0.3-0.5%,Mn:0.3-0.5%,Zr:0.3-0.5%,Ti:0.5-1%,Ta:0.1-0.15%,Re:0.05-0.1%,La:0.05-0.1%,余量为Fe,将上述原料混合1-2h后装入模具于500-600MPa压制成坯,400-500℃保温处理1-2h后于惰性气体保护条件下1000-1100℃烧结1.5-2.5h,冷却后磨削加工处理,得到活塞环基体;
(2)准备涂层材料,所述涂层材料由下述重量份的原料制得:0.3-0.5%聚乙烯醇溶液30-40,20-50μm氮化铝5-10,20-50μm氧化锆3-5,硅烷偶联剂KH-560 0.3-0.5,钛粉2-4,铜粉1-2,钛酸钾晶须0.5-1,按重量称取上述原料,先将氮化铝、氧化锆与聚乙烯醇溶液混合均匀、喷雾干燥后惰性条件下400-450℃热处理1-2h,然后与钛粉、铜粉混合后在惰性条件下球磨至20-60μm,最后加入其余原料高速混合0.5-1h,即得涂层材料,其中喷雾干燥入口温度为185-195℃,出口温度为100-110℃;
(3)制备活塞环成品,将(2)中的涂层材料采用大气等离子喷涂技术喷涂于(1)中的活塞环基体表面形成厚度为200-500μm涂层,即得耐老化复合涂层内燃机用活塞环。
本发明的优点是:
本发明结合活塞环粉末冶金技术与复合涂层表面处理,通过在氮化铝、氧化锆陶瓷粉体表面进行碳包覆、并与钛粉、铜粉金属粉体、钛酸钾晶须混合以及硅烷偶联剂表面改性,得到的涂层材料粉体之间与涂层材料粉体与活塞环基体的界面润湿性好,通过大气等离子喷涂技术喷涂后能牢固、稳定地结合在活塞环基体表面,结合强度高,同时,通过基体材料以及涂层材料的选择与复配,使得到的活塞环既具有高耐磨、高耐损伤性能,同时涂层与基体结合强度高、不易发生涂层剥落,同时耐老化性能好,耐用性强,使用寿命长。
具体实施方式
一种耐老化复合涂层内燃机用活塞环的制备方法,方法包括以下具体步骤:
(1)铸造活塞环基体,所述活塞环基体的各化学成分的重量百分比如下:C:0.3%,Mn:0.3%,Zr:0.3%,Ti:0.5%,Ta:0.1%,Re:0.05%,La:0.05%,余量为Fe,将上述原料混合1h后装入模具于500MPa压制成坯,400℃保温处理1h后于惰性气体保护条件下1000℃烧结1.5h,冷却后磨削加工处理,得到活塞环基体;
(2)准备涂层材料,所述涂层材料由下述重量份的原料制得:0.3%聚乙烯醇溶液30,20-50μm氮化铝5,20-50μm氧化锆3,硅烷偶联剂KH-560 0.3,钛粉2,铜粉1,钛酸钾晶须0.5,按重量称取上述原料,先将氮化铝、氧化锆与聚乙烯醇溶液混合均匀、喷雾干燥后惰性条件下400℃热处理1h,然后与钛粉、铜粉混合后在惰性条件下球磨至20-60μm,最后加入其余原料高速混合0.5h,即得涂层材料,其中喷雾干燥入口温度为185℃,出口温度为100℃;
(3)制备活塞环成品,将(2)中的涂层材料采用大气等离子喷涂技术喷涂于(1)中的活塞环基体表面形成厚度为200μm涂层,即得耐老化复合涂层内燃机用活塞环。
上述制得的活塞环性能测试结果如下:孔隙率:3.9%,摩擦系数:0.56,硬度:≥1000HV,结合强度:≥100MPa。
Claims (1)
1.一种耐老化复合涂层内燃机用活塞环的制备方法,其特征在于,该方法包括以下具体步骤:
(1)铸造活塞环基体,所述活塞环基体的各化学成分的重量百分比如下:C:0.3-0.5%,Mn:0.3-0.5%,Zr:0.3-0.5%,Ti:0.5-1%,Ta:0.1-0.15%,Re:0.05-0.1%,La:0.05-0.1%,余量为Fe,将上述原料混合1-2h后装入模具于500-600MPa压制成坯,400-500℃保温处理1-2h后于惰性气体保护条件下1000-1100℃烧结1.5-2.5h,冷却后磨削加工处理,得到活塞环基体;
(2)准备涂层材料,所述涂层材料由下述重量份的原料制得:0.3-0.5%聚乙烯醇溶液30-40,20-50μm氮化铝5-10,20-50μm氧化锆3-5,硅烷偶联剂KH-560 0.3-0.5,钛粉2-4,铜粉1-2,钛酸钾晶须0.5-1,按重量称取上述原料,先将氮化铝、氧化锆与聚乙烯醇溶液混合均匀、喷雾干燥后惰性条件下400-450℃热处理1-2h,然后与钛粉、铜粉混合后在惰性条件下球磨至20-60μm,最后加入其余原料高速混合0.5-1h,即得涂层材料,其中喷雾干燥入口温度为185-195℃,出口温度为100-110℃;
(3)制备活塞环成品,将(2)中的涂层材料采用大气等离子喷涂技术喷涂于(1)中的活塞环基体表面形成厚度为200-500μm涂层,即得耐老化复合涂层内燃机用活塞环。
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CN111168038A (zh) * | 2020-03-09 | 2020-05-19 | 西南交通大学 | 一种碳铜复合材料的制备装置及其方法 |
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CN86106714A (zh) * | 1986-09-28 | 1988-04-13 | 江苏工学院 | 活塞环表面强化等离子喷涂层材料 |
CN1540026A (zh) * | 2003-04-25 | 2004-10-27 | 住友金属工业株式会社 | 奥氏体系不锈钢 |
CN101096423A (zh) * | 2007-06-22 | 2008-01-02 | 哈尔滨工业大学 | 耐高温树脂改性聚苯酯三元合金超声马达摩擦材料 |
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CN86106714A (zh) * | 1986-09-28 | 1988-04-13 | 江苏工学院 | 活塞环表面强化等离子喷涂层材料 |
CN1540026A (zh) * | 2003-04-25 | 2004-10-27 | 住友金属工业株式会社 | 奥氏体系不锈钢 |
CN101096423A (zh) * | 2007-06-22 | 2008-01-02 | 哈尔滨工业大学 | 耐高温树脂改性聚苯酯三元合金超声马达摩擦材料 |
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CN111168038A (zh) * | 2020-03-09 | 2020-05-19 | 西南交通大学 | 一种碳铜复合材料的制备装置及其方法 |
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