Saturday, October 27, 2007

維氏硬度試驗 www.tool-tool.com

Bewise Inc. www.tool-tool.com Reference source from the internet.

维氏硬度测量仪

維氏硬度測量儀

維氏硬度試驗壓入硬度試驗之一種,其測量值用HV表示。

維氏硬度試驗最初於20世紀20年代初被提出,比起其他硬度試驗其優點有:硬度值與壓頭大小、負荷值無關;無需根據材料軟硬變換壓頭;正方形的壓痕輪廓邊緣清晰,便於測量。維氏硬度被應用於所有金屬,並是應用最廣泛的硬度標準之一。

只要被測材料質地均勻,維氏硬度試驗可以用低負荷和小壓痕得到可靠的硬度值,這樣能減少材料破壞,或用於薄小的試驗材料。這一點上維氏硬度要優於布氏硬度

另外,在硬度不高(硬度值400以下)的同一均勻材料上,維氏和布氏硬度試驗得出的數值近似。

[編輯] 測量方法

左为压痕在材料表面的投影,l1和l2为压痕对角线长;右为金刚石压头的侧面观,其相对面夹角为136°。

左為壓痕在材料表面的投影,l1和l2為壓痕對角線長;右為金剛石壓頭的側面觀,其相對面夾角為136°。

維氏硬度試驗使用正四棱錐形的金剛石壓 頭,其相對面夾角為136°。由於其硬度極高,金剛石壓頭可以用於壓入幾乎所有材料,而且棱錐的形狀使得壓痕和壓頭本身的大小無關。將壓頭用一定的負荷 (試驗力)壓入被測材料表面。保持負荷一定時間後,卸除負荷,測量材料表面的方形壓痕之對角線長度。對相互垂直的二對角線長度(l1和l2)取其算術平均值

維氏硬度值的計算公式為:

HV  = 0.102 \times \frac{F}{S} = 0.102 \times \frac{2 F / \sin \frac{\alpha}{2}}{d^2}
F = 負荷 (牛頓力)
S = 壓痕表面積 (平方毫米)
α = 壓頭相對面夾角=136°
d = 平均壓痕對角線長度 (毫米)

報告維氏硬度值的標準格式為xHVy。例如440HV30中,440是維氏硬度值,30指的是測量所用的負荷值(單位:千克力)。

[編輯] 常見材料的維氏硬度

來自[1]

[編輯] 標準

  • ISO 6507-1:2005 Ed. 3 Vickers hardness test Part 1: Test method
  • ISO 6507-2:2005 Ed. 3 Vickers hardness test Part 2: Verification and calibration of testing machines
  • ISO 6507-3:2005 Ed. 3 Vickers hardness test Part 3: Calibration of reference blocks
  • ISO 6507-4:2005 Ed. 1 Vickers hardness test Part 4: Tables of hardness values
  • GB/T4340.1-1999 金屬維氏硬度第1部分:試驗方法
  • GB/T4340.2-1999 金屬維氏硬度第2部分:硬度計的檢驗
  • GB/T4340.3-1999 金屬維氏硬度第3部分:標準硬度塊的標定


歡迎來到Bewise Inc.的世界,首先恭喜您來到這接受新的資訊讓產業更有競爭力,我們是提供專業刀具製造商,應對廠商高品質的刀具需求,我們可以協助廠商滿足您對產業的不同要求,我們有能力達到非常卓越的客戶需求品質,這是現有相關技術無法比擬的,我們成功的滿足了各行各業的要求,包括:精密HSS刀具、協助客戶設計刀具流程、Carbide Cutting tools設 計、航太刀具設計、超高硬度的切削刀具、醫療配件刀具設計、汽車業刀具設計、電子產業鑽石刀具、木工產業鑽石刀具等等。我們的產品涵蓋了從民生刀具到工業 級的刀具設計;從微細刀具到大型刀具;從小型生產到大型量產;全自動整合;我們的技術可提供您連續生產的效能,我們整體的服務及卓越的技術,恭迎您親自體 驗!!

BW Bewise Inc. Willy Chen willy@tool-tool.com bw@tool-tool.com www.tool-tool.com skype:willy_chen_bw mobile:0937-618-190 Head &Administration Office No.13,Shiang Shang 2nd St., West Chiu Taichung,Taiwan 40356 TEL:+886 4 24710048 / FAX:+886 4 2471 4839 N.Branch 5F,No.460,Fu Shin North Rd.,Taipei,Taiwan S.Branch No.24,Sec.1,Chia Pu East Rd.,Taipao City,Chiayi Hsien,Taiwan

Welcome to BW tool world! We are an experienced tool maker specialized in cutting tools. We focus on what you need and endeavor to research the best cutter to satisfy users demand. Our customers involve wide range of industries, like mold & die, aerospace, electronic, machinery, etc. We are professional expert in cutting field. We would like to solve every problem from you. Please feel free to contact us, its our pleasure to serve for you. BW product including: cutting toolaerospace tool .HSS Cutting toolCarbide end millsCarbide cutting toolNAS Cutting toolCarbide end millAerospace cutting toolФрезерыCarbide drillHigh speed steelMilling cutterCVDD(Chemical Vapor Deposition Diamond )PCBN (Polycrystalline Cubic Boron Nitride) Core drillTapered end millsCVD Diamond Tools Inserts’PCD Edge-Beveling Cutter(Golden Finger’PCD V-Cutter’PCD Wood tools’PCD Cutting tools’PCD Circular Saw Blade’PVDD End Mills’diamond tool Single Crystal Diamond Metric end millsMiniature end millsСпециальные режущие инструменты Пустотелое сверло Pilot reamerFraisesFresas con mango PCD (Polycrystalline diamond) FreseElectronics cutterStep drillMetal cutting sawDouble margin drillGun barrelAngle milling cutterCarbide burrsCarbide tipped cutterChamfering toolIC card engraving cutterSide cutterNAS toolDIN toolSpecial toolMetal slitting sawsShell end millsSide and face milling cuttersSide chip clearance sawsLong end millsStub roughing end millsDovetail milling cuttersCarbide slot drillsCarbide torus cuttersAngel carbide end millsCarbide torus cuttersCarbide ball-nosed slot drillsMould cutterTool manufacturer.

Bewise Inc. www.tool-tool.com

BW специализируется в научных исследованиях и разработках, и снабжаем самым высокотехнологичным карбидовым материалом для поставки режущих / фрезеровочных инструментов для почвы, воздушного пространства и электронной индустрии. В нашу основную продукцию входит твердый карбид / быстрорежущая сталь, а также двигатели, микроэлектрические дрели, IC картонорезальные машины, фрезы для гравирования, режущие пилы, фрезеры-расширители, фрезеры-расширители с резцом, дрели, резаки форм для шлицевого вала / звездочки роликовой цепи, и специальные нано инструменты. Пожалуйста, посетите сайт www.tool-tool.com для получения большей информации.

BW is specialized in R&D and sourcing the most advanced carbide material with high-tech coating to supply cutting / milling tool for mould & die, aero space and electronic industry. Our main products include solid carbide / HSS end mills, micro electronic drill, IC card cutter, engraving cutter, shell end mills, cutting saw, reamer, thread reamer, leading drill, involute gear cutter for spur wheel, rack and worm milling cutter, thread milling cutter, form cutters for spline shaft/roller chain sprocket, and special tool, with nano grade. Please visit our web www.tool-tool.com for more info.

No comments: