سختی سنج ویکرز تارنت خودکار سری MHV-Z، بر اساس این اصل که فرورفتگی الماس هرمی چهار گوش مثبت، سطح نمونه را فشار می دهد تا فرورفتگی ایجاد شود. برای نمونه های کوچک، نمونه های نازک، پوشش سطح، عملیات حرارتی سطح قطعه کار تست سختی ویکرز باشد. با عملکرد پایدار، ساختار قوی، قابلیت اطمینان بالا، عملکرد ساده، اتخاذ سیستم اندازه گیری نوری با بزرگنمایی بالا، تنظیم منبع نور سرد، فناوری سنجش فوتوالکتریک و به کمک رایانه به این معنی است که عملکرد قدرتمندی دارد. به طور گسترده ای در زمینه های پردازش فلز، صنایع الکترونیک، قطعات قالب، ساخت ساعت، بازرسی کیفیت مهندسی و غیره استفاده می شود. یک سختی سنج ایده آل برای تحقیق و آزمایش مواد است.
Function & application
l Metal processing manufacturing quality control links
l University education teaching demonstration experiment
l Failure analysis test of metal material
l Testing of material hardness of scientific research institutions
l Quality inspection departments quality testing links
Working Principle
Micro-Vickers (or Knoop) hardness test principle is that put the provisions of the positive pyramid diamond indenter into the sample surface(with fixed experimental force) and maintain a certain length (holding), and then unloading. Finally, there is a positive quadrangular pyramid or kenup indentation with a square surface on the surface of the specimen. Then we can attain the area of indentation via measuring the length of the diagonal by a micrometer eyepiece. Then the corresponding Vickers (or Knoop) hardness values are obtained.
Working Conditions
l Operation Temperature：18～28℃；
l Relative Humidity：≤65％；
l In an environment free from vibration,no corrosive medium.
l Installed on a flat basis.
Instrument Features
l Widely used in micro-specimen, thin specimen, surface coating, heat treatment of workpiece surface samples and
etc.Vickers hardness test to meet different demands of scientific research institutions, precision machining and quality
inspection departments and other materials research;
l Adopt automatic turret device, can be self-conversion indenter and microscopic eyepiece, high efficiency;
l Adopt electronic automatic loading system to control the main test force, eliminating the need to load the weight, the
operation more convenient;
l Equipped with a variety of small load Vickers hardness scale spare;
l Innovative, rugged construction, high reliability, easy to operation, intuitive reading, high efficiency;
l Adopt large-screen LCD liquid crystal display, easy to operate, visually display the test results;
l Light mechanical and electrical integration of high-tech products, high efficiency;
l Adopt high magnification optical sensing system and high precision photoelectric sensing technology, the test point
positioning is accurate, the test result is more accurate
l Adopt diamond indenter, durable and accurate;
l Adjustable cold light source measurement system that can control the light strength through the software;
l Optional photographic device, can be achieved on the measured indentation and material microstructure to shoot for later
analysis;
l With ISO 6507, ASTM E92, JIS Z2244, GB/T4340.2 and other relevant domestic and foreign standards.
Operating Method and Attentions
Instrument Maintenance
l Read the manual carefully before using the instrument. Learn the operation steps and attentions to avoid damage the
instrument or personal safety accidents caused by improper operation;
l The instrument should be carried at the bottom of the handling, to prohibit cross. Before loading, please unplug the power
plug, fixed measuring lever and remove the weight and boom;
l Carefully remove the shockproof tape for protecting the indenter when installed otherwise the accuracy of indenter
positioning is not high;
l The surface of the test piece should be smooth, no dirt, scale, pits and significant processing traces;
l Machine add unloading test power, it is forbidden to turn the variable load the handwheel, such as rotating dislocation can
lead to internal gear, chaos test force, and even cause damage to items within the machine;
l Diamond indenter and indenter are the core of the instrument, the operation should be careful not to touch the pressure
head
l The indenter should be kept clean when used to ensure the accuracy of the test. If the indenter is stained with oil or dust
and other stains, can be used cotton with absorbent (industrial) or ether in the top of the indenter carefully wipe clean
l When not in use for a long time should cover dust cover, in order to prevent dust into the machine interior, hardness
block, ball head after using coated with anti-rust oil, prevent rust;
l After a long idle time, the electrical components should be preheated before testing
l Conducted at least once a year instrument verification, to ensure the accuracy of the hardness tester
l When replacing the fuse or removing the weight, turn off the power first.
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