TW201438884A - 具有硬質膜層的不銹鋼製品及其製備方法 - Google Patents

具有硬質膜層的不銹鋼製品及其製備方法 Download PDF

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TW201438884A
TW201438884A TW102103214A TW102103214A TW201438884A TW 201438884 A TW201438884 A TW 201438884A TW 102103214 A TW102103214 A TW 102103214A TW 102103214 A TW102103214 A TW 102103214A TW 201438884 A TW201438884 A TW 201438884A
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stainless steel
steel substrate
ion implantation
hard
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chun-jie Zhang
Xu Liu
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Fih Hong Kong Ltd
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Abstract

一種具有硬質膜層的不銹鋼製品,其包括不銹鋼基體、依次形成在不銹鋼基體上的打底層、過渡層及硬質層,該打底層為Ti層;該過渡層為TiaCrb層,其中,1≦a≦2、2≦b≦3;該硬質層為TixCryNz層,其中,2≦x≦4、3≦y≦8及10≦z≦16。本發明還提供了由上述不銹鋼製品的製備方法。

Description

具有硬質膜層的不銹鋼製品及其製備方法
本發明涉及一種具有硬質膜層的不銹鋼製品及其製備方法。
現代社會人們對電子產品的質量要求越來越高,不僅要求比較高的外觀質量,同時還要經久耐用,這就要求電子產品表面要有比較高的硬度和耐磨性。
真空鍍膜(PVD)係一種非常環保的鍍膜技術,已被廣泛用來進行材料表面改性,提升材料表面性能。濺射沉積係真空鍍膜方法的一種,其被廣泛用於沉積硬質塗層。係然濺射沉積獲得的塗層的緻密度不夠高,因此限制了塗層硬度的進一步提高。
鑒於此,提供一種具有硬質膜層的不銹鋼製品,該不銹鋼製品具有較高硬度。
另外,還有必要提供一種上述不銹鋼製品的製備方法。
一種具有硬質膜層的不銹鋼製品,其包括不銹鋼基體、依次形成在不銹鋼基體上的打底層、過渡層及硬質層,該打底層為Ti層;該過渡層為TiaCrb層,其中,1≦a≦2、2≦b≦3;該硬質層為TixCryNz層,其中,2≦x≦4、3≦y≦8及10≦z≦16。
一種具有硬質膜層的不銹鋼製品的製備方法,其包括如下步驟:
提供不銹鋼基體;
提供一真空鍍膜裝置,該真空鍍膜裝置包括一鍍膜室、設置在該鍍膜室內的鈦靶、鉻靶及射頻電極,該射頻電極用以離化金屬原子及氣體;
將該不銹鋼基體置於該真空鍍膜裝置內,開啟所述鈦靶,並向該射頻電極通入電流,在不銹鋼基體上形成一打底層,該打底層為Ti層;
同時開啟所述鈦靶和鉻靶,在該打底層上形成一過渡層,該過渡層為TiaCrb層,其中,1≦a≦2、2≦b≦3;
以氮氣為反應氣體,同時開啟所述鈦靶和鉻靶,在該過渡層上形成一硬質層,該硬質層為TixCryNz層,其中,2≦x≦4、3≦y≦8,10≦z≦16。
經上述處理後製得的不銹鋼製品的表面顯微維氏硬度為800HV0.025~1000HV0.025。所述不銹鋼製品上形成的膜層組織均勻、緻密性高。
10...不銹鋼製品
11...不銹鋼基體
111...離子注入層
13...打底層
15...過渡層
17...硬質層
200...真空鍍膜裝置
20...鍍膜室
30...真空泵
22...鈦靶
23...鉻靶
26...軌跡
27...氣源通道
圖1係本發明較佳實施方式不銹鋼製品的剖視示意圖;
圖2係本發明較佳實施方式真空鍍膜裝置的示意圖。
請參閱圖1,本發明一較佳實施例的具有硬質塗層的不銹鋼製品10包括不銹鋼基體11、打底層13、過渡層15及硬質層17。
該不銹鋼基體11表層形成有一離子注入層111。所述打底層13形成於該離子注入層111上。該離子注入層111中主要含有Fe元素、N元素,Fe與N的原子個數比為1:4~1:7。該離子注入層111的厚度為0.1~0.2μm。
該打底層13為Ti層。該打底層13的厚度為0.3~0.5μm。
該過渡層15為TiaCrb層,其形成於打底層13的表面。TiaCrb中,1≦a≦2、2≦b≦3。該過渡層15的厚度為0.5~0.8μm。
該硬質層17為TixCryNz層,其形成於過渡層15的表面。TixCryNz中,2≦x≦4、3≦y≦8及10≦z≦16。該硬質層17的厚度為1.2~1.5μm。
本發明還提供所述具有硬質層的不銹鋼製品的製備方法,主要包括如下步驟:
(1) 提供不銹鋼基體11。
(2) 對不銹鋼基體11進行離子注入處理。
請結合參見圖2,提供一真空鍍膜裝置200,其包括一鍍膜室20及連接於鍍膜室20的一真空泵30,真空泵30用以對鍍膜室20抽真空。該鍍膜室20內設有轉架(未圖示)、相對設置的二鈦靶22、相對設置的二鉻靶23及固設在該鍍膜室20頂壁上的射頻電極(未圖示)。轉架帶動不銹鋼基體11沿圓形的軌跡26公轉,且不銹鋼基體11在沿軌跡26公轉時亦自轉。每一鈦靶22及每一鉻靶23的兩端均設有氣源通道27,氣體經該氣源通道27進入所述鍍膜室20中。
該射頻電極用以離化從鈦靶22及鉻靶23濺射出的鈦原子、鉻原子,形成鈦等離子體、鉻等離子體;同時還可離化氬氣、氮氣等氣體,形成氬氣等離子體、氮氣等離子體。
將不銹鋼基體11固定於真空鍍膜機200的鍍膜室20中的轉架上,將該鍍膜室20抽真空至2×10-1Pa~8×10-1Pa,加熱所述鍍膜室20至200~250℃(即離子注入的溫度為200~250℃),設置該射頻電極的電流為5-8A,施加於不銹鋼基體11上的偏壓為-1300~-1500V;向該鍍膜室20內通入氮氣及氬氣,氬氣的流量為100~200標準毫升/分鐘(sccm)、氮氣的流量為200~600sccm,離子注入時間為20~35min。如此,在不銹鋼基體11的表層形成一離子注入層111。
在該離子注入過程中,射頻電極放電用以離化氬氣、氮氣,形成氬等離子體、氮等離子體。
該離子注入層111中主要含有Fe元素、N元素,Fe元素來自不銹鋼基體11本身,N元素來自被射頻電極離化形成的氮等離子體。該離子注入層111中,Fe與N的原子個數比為1:4~1:7。該離子注入層111的厚度為0.1~0.2μm。所述離子注入層111可提高所述不銹鋼基體11的硬度。
(3) 在不銹鋼基體11上沉積一打底層13。
該打底層13為Ti層。設置該射頻電極的電流為5-8A、所述鍍膜室20的溫度為150~200℃(即濺射溫度為150~200℃),調節氬氣流量至100~200sccm;開啟所述鈦靶的電源,並設定其功率為3~5kw,於不銹鋼基體11上施加-300~-350V的偏壓,沉積打底層13。沉積該打底層13的時間為8~15min。該打底層13的厚度為0.3~0.5μm。
(4) 在打底層13上沉積一過渡層15。
保持所述射頻電極的電流不變,調節氬氣流量至100~150sccm,設置所述鍍膜室至150~180℃(即濺射溫度為150~180℃);同時開啟所述鈦靶及鉻靶的電源,並設定鈦靶功率為5~7kw,鉻靶功率為8~12kw,於不銹鋼基體11上施加-350~-400V的偏壓,沉積過渡層15。沉積該過渡層15的時間為15~25min。
在形成所述過渡層15的過程中,部分從鈦靶22及鉻靶23濺射出的鈦原子、鉻原子被射頻電極離化成等離子體,如此可提高過渡層15與打底層13的結合力、過渡層15的緻密性。
該過渡層15為TiaCrb層,其中,1≦a≦2、2≦b≦3。該過渡層15的厚度為0.5~0.8μm。
(5) 在過渡層15上沉積一硬質層17。
保持所述射頻電極的電流、濺射溫度不變,調節氬氣流量至150~200sccm;設定鈦靶功率為4~6kw、鉻靶功率為10~15kw;向通入氮氣,氮氣的流量為300~500sccm;於不銹鋼基體11上施加-1300~-1500V的偏壓,沉積硬質層17。沉積該硬質層17的時間為25~50min。
在形成所述硬質層17的過程中,部分從鈦靶22及鉻靶23濺射出的鈦原子、鉻原子被射頻電極離化成等離子體,提高了硬質層17中Ti原子及Cr原子與N原子之間的鍵合力、硬質層17內組織的均勻性及緻密性,進而提高硬質層17的硬度。
該硬質層17為TixCryNz層,其中,2≦x≦4、3≦y≦8,10≦z≦16。該硬質層17的厚度為1.2~1.5μm。
(6) 對所述形成硬質層17的不銹鋼基體11進行液氮冷卻處理。
向鍍膜室20內通入液氮,以3~5℃/min的降溫速率將鍍膜室20內的溫度降至100℃,並保持鍍膜室20內的壓力為2~5Pa;再以5~6℃/min的降溫速率將鍍膜室20內的溫度由100℃降至70℃,並保持鍍膜室20內的壓力為1~2Pa。
所述液氮冷卻處理,可降低不銹鋼基體11與打底層13之間及各膜層之間的應力,提高膜基之間的結合力、不銹鋼製品10的耐刮擦性能。
經上述處理後製得的不銹鋼製品10的表面顯微維氏硬度為800HV0.025~1000HV0.025。所述不銹鋼製品10上形成的膜層均勻、緻密性高。
實施例1
(1) 提供一不銹鋼基體11。
(2) 對不銹鋼基體11進行離子注入處理。
所述鍍膜室20內的真空度為2×10-1Pa,離子注入的溫度為220℃,射頻電極的電流6A,施加於不銹鋼基體11上的偏壓為-1400V;氬氣的流量為150sccm、氮氣的流量為400sccm,注入時間為30min。
該離子注入層111的厚度為0.15μm。
(3) 在不銹鋼基體11上沉積一打底層13。
保持該射頻電極的電流、氬氣流量不變;設置濺射溫度為170℃、鈦靶的功率為4kw,施加於不銹鋼基體11上的偏壓為-300V,沉積時間為10min。該打底層13的厚度為0.4μm。
(4) 在打底層13上沉積一過渡層15。
保持所述射頻電極的電流、氬氣流量及濺射溫度不變,設置鈦靶的功率為6kw、鉻靶的功率為10kw,施加於不銹鋼基體11上的偏壓為-400V,沉積時間為20min。該過渡層15的厚度為0.6μm。
(5) 在過渡層15上沉積一硬質層17.
保持所述射頻電極的電流、濺射溫度不變,設置氬氣流量為180sccm;並設置鈦靶的功率為5kw、鉻靶的功率為12kw;向鍍膜室20通入400sccm流量的氮氣;施加於不銹鋼基體11上的偏壓為-1400V,沉積時間為40min。該硬質層17的厚度為1.4μm。
(6) 對所述形成硬質層17的不銹鋼基體11進行液氮冷卻處理。
向鍍膜室20內通入液氮,以3℃/min的降溫速率將鍍膜室20內的溫度降至100℃,並保持鍍膜室20內的壓力為4Pa;再以5℃/min的降溫速率將鍍膜室20內的溫度由100℃降至70℃,並保持鍍膜室20內的壓力為2Pa。
經上述方法形成的不銹鋼製品10的表面顯微維氏硬度為815HV0.025
實施例2
(1) 提供一不銹鋼基體11。
(2) 對不銹鋼基體11進行離子注入處理。
所述鍍膜室20內的真空度為5×10-1Pa,離子注入的溫度為250℃,該射頻電極的電流8A,施加於不銹鋼基體11上的偏壓為-1500V;氬氣的流量為200sccm、氮氣的流量為600sccm,注入時間為30min。
該離子注入層111的厚度為0.15μm。
(3) 在不銹鋼基體11上沉積一打底層13。
保持該射頻電極的電流不變,調節氬氣流量至150sccm、濺射溫度為200℃;設置鈦靶的功率為5kw,施加於不銹鋼基體11上的偏壓為-350V,沉積時間為10min。該打底層13的厚度為0.5μm。
(4) 在打底層13上沉積一過渡層15。
保持所述射頻電極的電流、氬氣流量及濺射溫度不變,設置鈦靶的功率為7kw、鉻靶的功率為12kw,施加於不銹鋼基體11上的偏壓為-400V,沉積時間為25min。該過渡層15的厚度為0.7μm。
(5) 在過渡層15上沉積一硬質層17
保持所述射頻電極的電流、濺射溫度不變,設置氬氣流量至200sccm;設置鈦靶的功率為6kw、鉻靶的功率為15kw;向鍍膜室20通入500sccm流量的氮氣;施加於不銹鋼基體11上的偏壓為-1500V的偏壓,沉積時間為40min。該硬質層17的厚度為1.5μm。
(6) 對所述形成硬質層17的不銹鋼基體11進行液氮冷卻處理。
向鍍膜室20內通入液氮,以5℃/min的降溫速率將鍍膜室20內的溫度降至100℃,並保持鍍膜室20內的壓力為4Pa;再以6℃/min的降溫速率將鍍膜室20內的溫度由100℃降至70℃,並保持鍍膜室20內的壓力為1Pa。
經上述方法形成的不銹鋼製品10的表面顯微維氏硬度為1000HV0.025
10...不銹鋼製品
11...不銹鋼基體
111...離子注入層
13...打底層
15...過渡層
17...硬質層

Claims (10)

  1. 一種具有硬質膜層的不銹鋼製品,其包括不銹鋼基體,其改良在於:該不銹鋼製品還包括依次形成在不銹鋼基體上的打底層、過渡層及硬質層,該打底層為Ti層;該過渡層為TiaCrb層,其中,1≦a≦2、2≦b≦3;該硬質層為TixCryNz層,其中,2≦x≦4、3≦y≦8及10≦z≦16。
  2. 如申請專利範圍第1項所述之不銹鋼製品,其中該不銹鋼基體表層形成有離子注入層,打底層形成在該離子注入層上,該離子注入層主要含有Fe元素、N元素。
  3. 如申請專利範圍第2項所述之不銹鋼製品,其中該離子注入層中,Fe與N的原子個數比為1:4~1:7。
  4. 如申請專利範圍第2或3項所述之不銹鋼製品,其中該離子注入層的厚度為0.1~0.2μm。
  5. 如申請專利範圍第1項所述之不銹鋼製品,其中該硬質層的厚度為1.2~1.5μm。
  6. 如申請專利範圍第1項所述之不銹鋼製品,其中該過渡層的厚度為0.5~0.8μm。
  7. 一種具有硬質膜層的不銹鋼製品的製備方法,其包括如下步驟:
    提供不銹鋼基體;
    提供一真空鍍膜裝置,該真空鍍膜裝置包括一鍍膜室、設置在該鍍膜室內的鈦靶、鉻靶及射頻電極,該射頻電極用以離化金屬原子及氣體;
    將該不銹鋼基體置於該真空鍍膜裝置內,開啟所述鈦靶,並向該射頻電極通入電流,在不銹鋼基體上形成一打底層,該打底層為Ti層;
    同時開啟所述鈦靶和鉻靶,在該打底層上形成一過渡層,該過渡層為TiaCrb層,其中,1≦a≦2、2≦b≦3;
    以氮氣為反應氣體,同時開啟所述鈦靶和鉻靶,在該過渡層上形成一硬質層,該硬質層為TixCryNz層,其中,2≦x≦4、3≦y≦8,10≦z≦16。
  8. 如申請專利範圍第7項所述之不銹鋼製品的製備方法,其中所述方法還包括在形成所述打底層之前,向該真空鍍膜裝置內通入氬氣及氮氣,在該不銹鋼基體表層形成一離子注入層的步驟。
  9. 如申請專利範圍第8項所述之不銹鋼製品的製備方法,其中在所述離子注入過程中,射頻電極的電流為5~8A,施加於不銹鋼基體上的偏壓為-1300~-1500V;氬氣的流量為100~200sccm、氮氣的流量為200~600sccm,注入時間為20~35min。
  10. 如申請專利範圍第7項所述之不銹鋼製品的製備方法,其中沉積所述硬質層的過程中,鈦靶功率為4~6kw、鉻靶功率為10~15kw;氮氣的流量為300~500sccm;施加於不銹鋼基體上施加的偏壓為-1300~-1500V,沉積時間為25~50min。
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