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弹簧涂层和表面处理

许多涂层和表面处理可用于金属。一些主要负责防腐,而另一些则旨在提高表面硬度或耐磨性。涂层也用于改变尺寸(轻微)和改变一些物理特性,如反射比和颜色。下表显示了金属的各种涂层和处理方法。

电解抛光

电解抛光用于金属零件的抛光。原理与电镀正好相反。工件在电解液中做为阳极,外加一个阴极来完成电路。在由此产生的脱镀过程中,材料从凸起的粗糙斑点中快速去除,产生非常光滑的抛光表面。? 这个过程主要用于从高度光滑的初始表面获得镜面。小于0.05的最终光洁度??如果初始表面粗糙度(均方根)不超过0.18至0.20,则可获得m??m。电解抛光用于抛光不锈钢板和零件。

滚筒去毛刺

滚压(振动抛光)机是一种安装在弹簧上的开顶桶或碗,通常内衬聚氨酯。振动作用是由安装在容器底部的振动电机、由标准电机驱动的轴或带有偏心负载的轴或由电磁铁系统产生的。翻滚有助于去除金属毛刺,清洁零件,或有助于使弹簧光洁度更高。

碗振动器是圆形碗状的,有一个安装在弹簧上的容器。振动作用通过安装在滤杯中心立轴上的偏心配重传递给滤杯。当被激活时,螺旋运动被传递给大量的部件和介质。碗振动器的主要优点是,一个完整的分离系统可以合并。为了将部件和介质分开,在通道中放置一个水坝,以便部件和介质被推上推下。在大坝的顶部是一个屏幕,部件和媒体通过屏幕。介质通过屏幕落回振动器杯中。零件从筛网上转移到收集料斗或输送机中。

喷丸处理

喷丸是一种冷加工方法,在受控条件下,喷丸流以高速指向金属表面,在金属零件的表露表面层中产生压缩应力。它不同于喷砂清理的主要目的和程度,它是控制产生准确和可重复的结果。虽然喷丸清理表面被喷丸,喷丸的主要目的是增加疲劳强度。

于喷丸的介质可以是铁、钢、玻璃丸、切割钢或不锈钢丝。金属弹丸按大小用数字表示。根据MIL-S-13165标准化的炮号范围为S70至S780。弹丸数量与单个弹丸的标称直径(单位:万分之一英寸)大致相同。喷丸作业的有效性通过阿尔门试片测量。这是一块薄而平的钢片,夹在一个实心块上,表露在喷丸中,产生弯曲。标准样品的弯曲程度可作为测量喷丸强度的一种手段。

电镀

电镀涉及到创建一个原电池,其中要电镀的部分是阴极,电镀材料是阳极。将这两种金属置于电解液槽中,从阳极到阴极施加直流电。电镀材料的离子通过电解液被驱动到电镀基底上,并用电镀材料的薄涂层覆盖零件。

钢、镍和铜基合金以及其他金属都易于电镀。两种方法是可能的。如果在基底上镀上一种更贵(活性较低)的金属,只要镀层保持完整以庇护基底免受环境影响,就可以减少氧化的倾向。锡、镍和铬通常用于电镀钢以防腐蚀。镀铬还可使表面硬度提高到HRC 70,这高于许多硬化合金钢的硬度。不幸的是,如果存在导电介质(如雨水),镀层中的任何中断或凹坑都可能为电流作用提供节点。因为基板不如镀层贵,它就变成了牺牲阳极,很快就会被腐蚀。用比基体贵的金属电镀很少用于将浸入水或其他电解液中的零件。

或者,可以在基板上镀一种不太贵的金属,作为牺牲阳极,代替基板进行腐蚀。最常见的例子是钢的镀锌层,也称为镀锌。锌或镉涂层将逐渐腐蚀和庇护更贵的钢基体,直到涂层耗尽,之后钢将氧化。锌涂层可以通过一种称为“热浸”的工艺而不是通过电镀来施涂,这将产生一种更厚、更具庇护性的涂层,这种涂层可以通过其“珍珠母”的外不雅观来识别。有关电镀涂层的一个警告是,基体可能发生氢脆,导致强度显著损失。电镀饰面不该用于疲劳负荷的零件。经验剖明,电镀严重降低了金属的疲劳强度,并可能导致早期失效。

氢脆-每当碳钢在准备电镀或某些电镀过程中被酸洗时,氢就会被材料吸收。虽然在酸洗或电镀槽中会产生裂纹,但在使用电镀弹簧时更经常出现裂纹。当存在(1)高应力集中、(2)高洛氏硬度或(3)高碳含量时,氢脆危害变得更为严重。回火材料特别易受影响。为了减轻脆化,弹簧必需在电镀后立即烘烤,以将氢从材料中排出。

化学镀

化学镀在基底上镀上一层镍而不需要任何电流。在这种情况下,基板“阴极”(没有阳极)起到催化剂的作用,启动化学反应,使电解质溶液中的镍离子还原并沉积在基板上。镍涂层还起到催化剂的作用,并保持反应进行,直到零件从镀液中取出。因此,可以形成相对较厚的涂层。涂层厚度通常在0.001英寸到0.002英寸之间。不同于电镀,化学镀镍板是完全均匀的,会进入孔和裂缝。镀层致密,硬度在43 HRC左右。其他金属也可以化学镀,但镍是最常用的。

化学涂料

对金属最常见的化学处理包括对钢进行磷酸清洗,以提供有限的短期氧化剂?抗离子性,对各种类型的油漆设计,以提供更持久的腐蚀防护?庇护。黑色氧化物是一种成本较低的选择,可在各种类型的钢、不锈钢或铜基底上形成防腐蚀屏障。黑色氧化物也会使不需要光反射的表面变暗。

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Platings
Process Commercial Specifications Classes Available Finishes/Grades Available Chromate Conversion Colors Available Primary Purpose
Cadmium
Plating
QQ-P-416

AMS-QQ-P-416

Class?I?-?0.0005"?minimum
thickness
Class?II?-?0.0003"?minimum
thickness
Class?III?-?0.0002"?minimum
thickness
Type?I?-?As plated
Type?II?-?With chromate treatment
Type?III?-?With phosphate treatment
Colorless
Irridescent
Bronze
Brown
Olive Drab
Yellow
Forrest Green
Primarily used to protect steel and cast iron against corrosion.
Chrome
Plating
QQ-C-320

AMS-QQ-C-320

Class?I?-?Corrosion protective plating
Class?II?-?Engineering plating
Type?I?-?Bright Finish
Type?II?-?Satin Finish
- The metal so produced is extremely hard and corrosion resistant. The process is used for applications where excellent wear and/or corrosion resistance is required.
Copper
Plating

MIL-C-14550B

AMS 2418
Class?0?-?0.001"?-?0.005"
Thickness
Class?1?-?0.001"?minimum
thickness
Class?2?-?0.0005"?minimum
thickness
Class?3?-?0.0002"?minimum
thickness
Class?4?-?0.0001"?minimum
thickness
- - Good corrosion resistance and conductivity.
Gold
Plating

MIL-G-45204C

Class?00?-?0.00002"?minimum thickness
Class?0?-?0.00003"?minimum thickness
Class?1?-?0.00005"?minimum thickness
Class?2?-?0.0001"?minimum thickness
Class?3?-?0.0002"?minimum thickness
Class?4?-?0.0003"?minimum thickness
Class?5?-?0.0005"?minimum thickness
Class?6?-?0.0015"?minimum thickness
Type?I?-?99.7% gold minimum
Type?II?-?99.0% gold minimum
Grade?A?-?90 Knoop maximum
Grade?B?-?91?-?129 Knoop
Grade?C?-?130?-?200 Knoop
Grade?D?-?201 Knoop and over
- Good corrosion resistance and high tarnish resistance. Solderability and conductivity are excellent.
Nickel
Plating
QQ-N-290

AMS-QQ-N-290

Class?I?-?Corrosion protective plating
Class?II?-?Engineering plating
Class?I?-?Grade?A?through
G (0.0016" - 0.0002" Thickness)
- Used extensively for decorative, engineering, and electroforming purposes.
Silver
Plating

QQ-S-365D

ASTM B700
Grade?A?-?Chromate
post-treatment
Grade?B?-?No supplementary
treatment
Type?I?-?Matte
finish
Type?II?-?Semi-bright
finish
Type?III?-?Bright
finish
- Good corrosion resistance and will tarnish easily. Solderability and conductivity are excellent.
Tin
Plating
ASTM B545

MIL-T-10727C

Type?I?-?Electroplated
Type II - Hot dipped
- - Good corrosion resistance and excellent solderability.
Vacuum
Cadmium

MIL-C-8837B

AMS-C-8837
Class?I?-?0.0005"?minimum
thickness
Class?II?-?0.0003"?minimum
thickness
Class?III?-?0.0002"?minimum
thickness
Type I - As plated
Type?II?-?With?chromate
treatment
Type?III?-?With?phosphate
treatment
Colorless
Irridescent
Bronze
Brown
Olive?Drab
Yellow
Forrest?Green
Primarily used to provide corrosion resistance to parts free from hydrogen contamination and possible embrittlement.
Zinc
Plating

ASTM B633

Service?Condition?1?(Fe/Zn?5)?-
mild?conditions,?5mm
thickness
Service?Condition?2?(Fe/Zn?8)?-
moderate?conditions,?8mm
thickness
Service?Condition?3?(Fe/Zn?12)?-
severe?conditions,?12mm
thickness
Service?Condition?4?(Fe/Zn?25)-
very severe conditions,?25mm
thickness
Type I - As plated
Type II - Colored chromate conversion coatings
Type III - Colorless chromate conversion coatings
Type IV - Phosphate conversion coating
Colorless
Blue
Olive?Drab
Yellow
Good corrosion resistance.

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Chemical Conversion Coatings
Process Commercial Specifications Classes Available Finishes/Grades Available Chromate Conversion Colors Available Primary Purpose
Black
Oxide

MIL-C-13924

Class 1 - Alkaline oxidizing process
Class 2 - Alkaline chromate oxidizing
Class 3 - Fused salt oxidizing process
Class 4 - Alkaline oxidizing process
Supplementary oil treatment per

MIL-C-16173

- A uniform, mostly decorative black coating. Limited corrosion resistance.
Phosphate
Coating
(Light)
TT-C-490E - Type?I?-?Zinc phosphate spray application Zinc phosphate immersion or dip application
Type?II?-?Aqueous iron phosphate
Type?III?-?Organic pretreatment coating

(MIL-C-8514)

Type?IV?-?Discontinued
Type?V?-?Zinc phosphate
- Type?I?-?All-purpose pretreatment prior to painting
Type?II?and?IV?-?For parts to be formed after painting
Type?III?-?Size and shape preclude?Type?I,?II,?IV
Type?V?-?Zinc phosphate
Phosphate
Coating
(Heavy)

MIL-DTL-16232G

Class?1?(Type?M/Z)?-
Supplementary preservative treatment or coating
Class?2?(Type?M)?-
Supplementary treatment with lubricating oil
Class?2?(Type?Z)?-
Supplementary treatment with preservative
Class?3?(Type?M/Z)?-
No supplementary treatment
Class?4?(Type?M/Z)?-
Chemically converted (may be dyed to color as specified)
Type?M?-?Manganese
Phosphate Base
Type?Z?-?Zinc
Phosphate Base
- Coating for medium and low alloy steels. Intended as a base for supplemental coatings which provide the major portion of corrosion resistance.

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Electroless Plating
Process Commercial Specifications Classes?Available Finishes/Grades?Available Chromate Conversion Colors Available Primary Purpose
Electroless
Nickel

MIL-C-26074F

AMS 2404C
AMS 2405B
Class 1 - As plated
Class 2 - Heat treated
Grade?A?-?0.001"?minimum
thickness
Grade?B?-?0.0005"?minimum
thickness
Grade?C?-?0.0015"?minimum
thickness
- Used to deposit nickel without the use of an electric current.

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Lubrication
Process Commercial Specifications Classes Available Finishes/Grades?Available Chromate Conversion Colors Available Primary Purpose
Solid
Film
Lubrication

MIL-L-46010

- Color 1 - Natural product color
Color 2 - Black
- Used to reduce wear and prevent galling, corrosion, and seizure of metals.

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为什么选择力司百灵弹簧?

large selection of springs

我们拥有超过25,000种弹簧标准件,还能满足您对特殊弹簧的定制需求。

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中国大陆地区免费陆上运输。

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所有琴钢线弹簧进行免费电镀处理。

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所有中大线径的标准件压缩弹簧进行免费端磨。

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in stock springs

库存弹簧都已整装待发。
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不论弹簧标准件或弹簧定制件,专业技术工程师提供全程支持。

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针对所有弹簧标准件和弹簧定制件,都具有合格证。

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针对所有弹簧标准件和弹簧定制件,都确保RoHS符合性。

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engineering and customer service support

技术工程师与客服团队随时为您服务。

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遍布全球的在线客户服务。

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弹簧标准件设计图纸可CAD下载。

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我们拥有全球的灵活性,无论您在世界的哪个地区,力司百灵弹簧都能为您找到解决方案。

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