提起硬度計(jì)，我們不少人可能陌生的很，不知道這是個(gè)什么東西。其廣泛應(yīng)用于測(cè)定微小、薄形試件、表面滲鍍層等試件的顯微硬度和測(cè)定玻璃、陶瓷、瑪瑙、人造寶石等較脆而又硬的材料的努氏硬度，是科研機(jī)構(gòu)、工廠及質(zhì)監(jiān)部門進(jìn)行材料研究和檢測(cè)的理想硬度測(cè)試儀器。不過對(duì)其的基本原理并不是很清楚，因此小編就維氏硬度計(jì)工作原理簡(jiǎn)述，下面讓我們一起了解下吧!

　　維氏硬度計(jì)原理：

　　以49.03~980.7N的負(fù)荷,將相對(duì)面夾角為136°的方錐形金剛石壓入器壓材料表面,保持規(guī)定時(shí)間后用測(cè)量壓痕對(duì)角線長(zhǎng)度，可燃?xì)怏w檢測(cè)儀再按公式來計(jì)算硬度的大小。它適用于較大工件和較深表面層的硬度測(cè)定。維氏硬度尚有小負(fù)荷維氏硬度試驗(yàn)負(fù)荷1.961~<49.03N，粗糙度儀維修它適用于較薄工件、工具表面或鍍層的硬度測(cè)定;顯微維氏硬度試驗(yàn)負(fù)荷<1.961N，風(fēng)速儀適用于金屬箔、極薄表面層的硬度測(cè)定。HV-適用于顯微鏡分析。維氏硬度(HV) 以120kg以內(nèi)的載荷和頂角為136°的金剛石方形錐壓入器壓入材料表面用材料壓痕凹坑的表面積除以載荷值即為維氏硬度值(HV)的換算。

維氏硬度計(jì)工作原理簡(jiǎn)述

　  維氏硬度的表示方法：

　　維氏硬度表示為HV維氏硬度符號(hào)HV前面的數(shù)值為硬度值后面為試驗(yàn)力值。標(biāo)準(zhǔn)的試驗(yàn)保持時(shí)間為10～15S。如果選用的時(shí)間超出這一范圍在力值后面還要注上保持時(shí)間。例如：

　　600HV30—表示采用294.2N(30kg)的試驗(yàn)力保持時(shí)間10～15S時(shí)得到的硬度值為600。

　　600HV30/20—表示采用294.2N(30kg)的試驗(yàn)力保持時(shí)間20S時(shí)得到的硬度值為600。

　　以上的介紹大概就是關(guān)于維氏硬度計(jì)工作原理簡(jiǎn)述，在使用的時(shí)候，一定要了解清楚，這樣方便更好的使用。

When we mention the hardness tester, many of us may be unfamiliar with it. We don't know what it is. It is widely used to measure the microhardness of micro and thin specimens, surface coating and other specimens, and to determine the Knoop hardness of brittle and hard materials such as glass, ceramics, agate and artificial gems. It is an ideal hardness testing instrument for research and testing of materials in scientific research institutions, factories and quality supervision departments. However, its basic principle is not very clear, so the working principle of Vickers hardness tester is briefly introduced. Let's understand it together!

Principle of Vickers hardness tester:

Under the load of 49.03 ~ 980.7n, the square cone-shaped diamond with a relative angle of 136 ° is pressed into the surface of the pressing material, and the diagonal length of the indentation is measured after the specified time, and the hardness is calculated by the combustible gas detector according to the formula. It is suitable for hardness measurement of larger workpieces and deeper surface layers. The Vickers hardness has small load Vickers hardness test load of 1.961 ~ < 49.03n. It is suitable for the hardness measurement of thin workpiece, tool surface or coating; the micro Vickers hardness test load is less than 1.961n, and the anemometer is suitable for the hardness measurement of metal foil and extremely thin surface layer. HV - suitable for microscopic analysis. Vickers hardness (HV) is the conversion of Vickers hardness (HV) when the load is less than 120kg and the diamond square cone impactor with a top angle of 136 ° is pressed into the material surface, and the surface product of indentation pits is divided by the load value, which is the conversion of Vickers hardness value (HV).

Working principle of Vickers hardness tester

The expression method of Vickers hardness is as follows:

Vickers hardness is expressed as HV Vickers hardness symbol. The value in front of HV is the hardness value, and the following is the test force value. The standard test holding time is 10 ~ 15s. If the selected time is beyond this range, the holding time should be noted after the force value. For example:

600hv30 - indicates that the hardness value is 600 when 294.2n (30kg) test force is used for 10-15s.

600hv30 / 20 - indicates that the hardness value is 600 with 294.2n (30kg) holding time of 20s.

The above introduction is about the working principle of Vickers hardness tester, in use, we must understand clearly, so as to facilitate better use.