關(guān)于磁粉檢測及滲透檢測等相關(guān)知識問答
液體滲透檢測能檢測什么？
液體滲透檢測（PT）是一種無損檢測，它可以檢測表面斷裂缺陷，如細(xì)線裂紋、表面孔隙率、新產(chǎn)品泄漏和疲勞裂紋等。 它可以利用液體染料將不可見的缺陷變?yōu)榭梢姷娜毕荨?/p>
What can be detected by liquid penetrant test?
Liquid penetrant testing (PT) is a one of non-destructive test, which can detect surface-breaking defects-such as hairline cracks, surface porosity, leaks in new products, and fatigue cracks. It can change invisible defects to visible defect by using liquid dye.
磁粉檢測是什么？
磁粉檢測 (MPT)，也稱為磁粉檢測（MPI），是一種無損檢測 (NDE) 技術(shù)，用于檢測大多數(shù)鐵磁材料（如鐵、鎳和鈷以及它們的一些合金）的表面和輕微亞表面缺陷。
What does magnetic particle testing detect?
Magnetic Particle Testing (MPT), also referred to as Magnetic Particle Inspection, is a nondestructive examination (NDE) technique used to detect surface and slightly subsurface flaws in most ferromagnetic materials such as iron, nickel, and cobalt, and some of their alloys.
滲透系統(tǒng)的四種方法是什么？
通過從零件中去除多余滲透劑的方法對滲透劑進(jìn)行分類。下面列出了四種方法：
方法 A - 可水洗
方法 B - 乳化，親脂性
方法 C - 可去除溶劑
方法 D - 乳化，親水性
可水洗（方法 A）滲透劑可以通過單獨(dú)用水沖洗從零件中去除。 這些滲透劑含有一種乳化劑（去污劑），可以單獨(dú)用水從零件表面清洗滲透劑。 水洗滲透劑有時被稱為自乳化系統(tǒng)。 乳化后滲透劑有兩種，親油性和親水性。 在乳化后親油體系（方法 B）中，滲透劑是油溶性的，并與油基乳化劑相互作用，從而使去除成為可能。 乳化后親水系統(tǒng)（方法 D）使用乳化劑，它是一種水溶性清潔劑，可通過水洗將多余的滲透劑從零件表面去除。 溶劑去除滲透劑（方法 C）需要使用溶劑從部件上去除滲透劑。
What are the 4 methods of penetrant systems?
Penetrants are then classified by the method used to remove the excess penetrant from the part. The four methods are listed below:
Method A - Water Washable
Method B - Post-Emulsifiable, Lipophilic
Method C - Solvent Removable
Method D - Post-Emulsifiable, Hydrophilic
Water washable (Method A) penetrants can be removed from the part by rinsing with water alone. These penetrants contain an emulsifying agent (detergent) that makes it possible to wash the penetrant from the part surface with water alone. Water washable penetrants are sometimes referred to as self-emulsifying systems. Post-emulsifiable penetrants come in two varieties, lipophilic and hydrophilic. In post-emulsifiers, lipophilic systems (Method B), the penetrant is oil soluble and interacts with the oil-based emulsifier to make removal possible. Post-emulsifiable, hydrophilic systems (Method D), use an emulsifier that is a water soluble detergent which lifts the excess penetrant from the surface of the part with a water wash. Solvent removable (Method C) penetrants require the use of a solvent to remove the penetrant from the part.
滲透劑有多少種類型？
三種基本類型的滲透劑： 顏色對比，熒光，雙重目的（熒光/顏色對比）
How many types of penetrant are there?
three basic types of penetrant: Colour contrast. Fluorescent. Dual purpose (fluorescent / colour contrast)
哪種類型的滲透劑最敏感？
熒光滲透劑本質(zhì)上比顏色對比度更敏感。 后乳化劑比水洗劑更敏感，因?yàn)闈B透劑過度洗滌的危險較小。 非水顯影劑是最敏感的。
Which type of penetrant is most sensitive?
Fluorescent penetrant is inherently more sensitive than colour contrast. Post-emulsifiable is more sensitive than water washable since there is less danger of over-washing of the penetrant. Non-aqueous developer is the most sensitive.
滲透測試的基本步驟是什么？
在染料滲透測試中，檢驗(yàn)人員一般遵循以下六個步驟：
? 清潔表面
? 涂抹染料滲透劑
? 去除多余的滲透劑并涂抹去除劑
? 使用顯影劑
? 檢查
? 清潔表面。
What are basic steps in penetrant testing?
In dye penetrant testing, inspectors generally follow these six steps:
? Clean the surface
? Apply the dye penetrant
? Remove extra penetrant and apply remover
? Apply developer
? Inspection
? Clean the surface
液體滲透試驗(yàn)的缺點(diǎn)是什么？
液體滲透測試有以下缺點(diǎn)： 廣泛、耗時的預(yù)清潔至關(guān)重要——表面污染物會掩蓋缺陷。 僅對表面斷裂缺陷敏感。 需要直接連接到被測表面。
What is disadvantage of liquid penetrant test?
Liquid penetrant testing has the following disadvantages: Extensive, time-taking pre-cleaning critical—surface contaminants can mask defects. Sensitive to surface-breaking defects only. Direct connection to the surface under test necessary.
磁粉探傷MPI的原理是什么？
該方法的原理是樣品被磁化以在材料中產(chǎn)生磁力線或磁通量。 如果這些力線遇到不連續(xù)性，例如裂縫，則在裂縫的表面會產(chǎn)生二次磁極。
What is the principle of magnetic particle inspection MPI?
The principle of the method is that the specimen is magnetised to produce magnetic lines of force, or flux, in the material. If these lines of force meet a discontinuity, such as a crack, secondary magnetic poles are created at the faces of the crack.
磁粉探傷有幾種類型？
有兩種不同的鐵磁檢查介質(zhì)：干粒子和濕粒子。 兩種形式都可以是熒光或非熒光（可見，顏色對比），并有多種顏色與測試材料形成對比。
How many types of magnetic particle inspection are there?
There are two different ferromagnetic examination media: dry particles and wet particles. Both forms can be either fluorescent or non-fluorescent (visible, color contrast) and come in a variety of colors to contrast with the tested material.
磁粉探傷有哪些局限？
無損檢測磁粉法的缺點(diǎn)是： 它僅限于鐵磁材料——通常是鐵和鋼，不能用于奧氏體不銹鋼。 很麻煩。 大多數(shù)方法都需要供電。
What are the limitations of magnetic particle inspection?
Disadvantages of the Magnetic Particle method of Non-Destructive Examination are: It is restricted to ferromagnetic materials - usually iron and steel, and cannot be used on austenitic stainless steel. It is messy. Most methods need a supply of electricity.
可以在涂漆表面上進(jìn)行MPI嗎？
根據(jù) ASTM E709-15，“薄的非導(dǎo)電涂層，例如 1 或 2 mil（0.02 至 0.05 毫米）的油漆，通常不會干擾指示的形成，但為了形成直接磁化必須在所有電接觸點(diǎn)去除非導(dǎo)電涂層。”
Can MPI be done on painted surface?
According to ASTM E709-15, “Thin nonconductive coatings, such as paint in the order of 1 or 2 mil (0.02 to 0.05 mm) will not normally interfere with the formation of indications, but they must be removed at all points where electrical contact is to be made for direct magnetization.”
染料滲透劑和磁粉檢測有什么區(qū)別？
MPI 能夠通過薄涂層檢測缺陷。 染料滲透劑對不良表面條件的耐受性較差，其有效性也會受到缺陷內(nèi)任何材料的不利影響。 此外，MPI 的應(yīng)用比染料滲透劑快得多。
What is the difference between dye penetrant and magnetic particle testing?
MPI has the capability to detect defects through thin coatings. Dye penetrant is less tolerant of poor surface condition and its effectiveness can also be adversely affected by any material within a defect. In addition MPI is much quicker to apply than dye penetrant.
