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T8MnAT8MnAT8MnAT8MnA

更新日期:2021年07月02日
有效期:360天
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價格:¥18
供貨總量:1100
規格:齊全
所屬行業:五金原材料-> 優特鋼-> 彈簧鋼
關鍵字:T8MnA琴鋼線鋼帶
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  • 產品詳情
T8MnA是一種 碳素工具鋼,同時也是典型的冷作模具鋼。該鋼具有較高的硬度,耐磨性和淬透性,價格較便宜。淬火硬化后使用硬度50-60HRC。
日本JIS標準鋼號SK5,德國DIN標準材料鋼號1.1830,德國DIN標準鋼號C85WS,英國BS標準鋼號060A81,法國NF標準鋼號Y75,瑞典SS標準鋼號1770,俄羅斯TOCT標準鋼號Y8L,韓國KS標準鋼號STC5。
硬度范圍是41-60,允許溫度為120° 韌性和抗拉強度不同,SWPB更高一些。
琴鋼線:抗拉強度可達3000MPA,也就是 可達260-300公斤/MM^2
JIS G3522-1991  琴鋼絲

1,適用范圍  
本標準對琴鋼絲(以下間稱鋼絲)進行了規定。
備考1.  本標準引用標準如下。
JIS G0558  鋼的脫碳層深度測定方法
JIS G3502  琴鋼絲線材
JIS K1310  鹽酸(合成),
JIS Z2241  金屬材料拉伸實驗方法

2,本標準對應的國際標準如下。
ISO 8458-1:1989  機械彈簧用鋼絲.第1部分:一般要求
ISO 8458-2:1989  機械彈簧用鋼絲.第2部分:鉛淬冷拔非合金鋼絲

用于制造琴弦,閥彈簧和高應力彈簧的鋼絲。具有強度高,彈性,抗疲勞,抗蠕變和韌性好,表面光滑潔凈,防銹能力強以及音樂性能優良等特點。鋼絲用鋼包括碳素鋼和不銹鋼。(見合金鋼絲)碳素琴鋼絲用高碳優質碳素結構鋼和碳素工具鋼制造。鋼中硫,磷的含量均不得超過0.025%,銅的含量不得超過0.20%。琴鋼絲的直徑約在0.08~6mm之間。每盤鋼絲應由一根鋼絲組成,不允許有焊接接頭存在。鋼絲應具有規定的抗拉強度和扭轉性能。用作閥彈簧的琴鋼絲一面上的總脫碳層深度不得超過絲徑的1%。鋼絲表面不得有裂紋,折疊,結疤,拉裂,氧化鐵皮和銹蝕,鋼絲的表面狀態有不拋光,拋光和鍍層等類。鍍層鋼絲具有光亮,美觀和耐磨蝕等特點。鍍層材料有鎘,錫和鋅一鎳合金等。

為了保證琴鋼絲的質量,對盤條的化學成分,內部組織的均勻性,非金屬夾雜,氣體含量,晶粒的均勻度,表面缺陷,脫碳層及不圓度等都有嚴格的要求。拉制成品前的熱處理一般采用電接觸加熱的索氏體化處理,以保證鋼絲通條性能均勻并提高加熱速度,縮短加熱時間,減少因加熱而產生的氧化鐵皮和脫碳層。熱處理后線坯采用鹽酸酸洗,以加快酸洗速度和使鋼絲表面具有良好的表面質量。酸洗后對不鍍層的鋼絲可采用磷化涂層處理,對鍍層鋼絲則采用黃化或硼砂處理。成品拔程的總減面率和平均道次減面率(見面積減縮率),對于干拉約為88%~92%和15%~17%,對于濕拉約為93%~96%和16%~18%。通常采用適當減少道次減面率和相應增加一些拉拔道次的拉拔工藝。對于彈簧用琴鋼絲,平直度很重要,拉拔時要通過調整拉絲模模架的角度或矯直輥的位置,進行嚴格控制。

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