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class="pic"><img src="http://tyunfile.71360.com/UploadFile/shangcai/637127776393837890/2741059.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="cvxpwyq" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>口碑好硬度機(jī)供應(yīng)商,硬度機(jī)</p><p><span>***更新：</span>2021-02-01 10:05:22</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="0iaspbd" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海尚材試驗(yàn)機(jī)有限公司</a></p><p><span>聯(lián)系人：</span>衛(wèi)志清</p><p><span>郵箱: </span>shangcaisy@163.com</p><p><span>電話: </span>17765160728</p><p><span>傳真: </span>021_57520236</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-50393010</p><p><span>地址: </span>奉城鎮(zhèn)奉旺路373號</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="rj2kpgi" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="t7rt29s" class="box"><p><p> 通過對洛氏硬度與維氏硬度壓痕深度關(guān)系曲線的分析得出公式本公式與國家標(biāo)準(zhǔn)實(shí)驗(yàn)換算值對照,換算式計(jì)算結(jié)果與標(biāo)準(zhǔn)實(shí)驗(yàn)值之誤差為±。(3)根據(jù)實(shí)際的實(shí)驗(yàn)數(shù)據(jù)利用線性回歸的方法對洛氏硬度與維氏硬度的換算進(jìn)行探討，得出公式：本公式使用范圍小，誤差較大，但計(jì)算簡便，在對精度要求不高時(shí)可以使用。3.洛氏硬度與布氏硬度的換算(1)對布氏壓痕和洛氏壓痕深度關(guān)系進(jìn)行分析，根據(jù)壓頭的應(yīng)力σHRC=σHB得出換算公式計(jì)算結(jié)果與國家標(biāo)準(zhǔn)實(shí)驗(yàn)值對照，換算式計(jì)算結(jié)果與標(biāo)準(zhǔn)實(shí)驗(yàn)值之誤差為±。(2)根據(jù)實(shí)際實(shí)驗(yàn)數(shù)據(jù)用線性回歸法得到公式公式誤差偏大，使用范圍偏小，但計(jì)算簡便，在對精度要求不高的情況下可以使用。4.布氏硬度與維氏硬度的換算布氏硬度與維氏硬度的關(guān)系，同樣根據(jù)σHB=σHV得出公式此公式換算結(jié)果與國家標(biāo)準(zhǔn)換算值對照，換算誤差為±2HV。5.努氏硬度與洛氏硬度的換算因?yàn)榕嫌捕扰c洛氏硬度的對應(yīng)曲線類似于拋物線，口碑好硬度機(jī)供應(yīng)商，故由曲線得出近似的換算公式為此公式比較精確，口碑好硬度機(jī)供應(yīng)商，口碑好硬度機(jī)供應(yīng)商，可以作為使用參考。數(shù)顯洛氏硬度計(jì)適用于黑色金屬、有色金屬和非金屬材料的硬度測定?？诒糜捕葯C(jī)供應(yīng)商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="口碑好硬度機(jī)供應(yīng)商,硬度機(jī)" src="http://tyunfile.71360.com/UploadFile/shangcai/637127776393837890/2741059.jpg"></div><p> 7)如果在目鏡中觀察到的成像呈模糊狀或一半清晰一半模糊，則說明光源中心偏離系統(tǒng)光路中心，需調(diào)節(jié)燈泡的中心位置。如果視場太暗或太亮可通過操作面板(6)上的軟鍵調(diào)節(jié)光源強(qiáng)弱。(8)如果想觀察試塊或試樣上的較大視場范圍，可將物鏡壓頭轉(zhuǎn)換手柄逆時(shí)針轉(zhuǎn)至主體前方，此時(shí)，光學(xué)系統(tǒng)總放大倍率為100X，處于觀察狀態(tài)。當(dāng)轉(zhuǎn)換1OX和40X物鏡時(shí)聚焦面有微量變化，可微調(diào)升降絲桿進(jìn)行聚焦。(9)將轉(zhuǎn)換手柄逆時(shí)針轉(zhuǎn)動，使壓頭主軸處于主體前方，此時(shí)壓頭前列(1)與聚焦好的平面之間間隙約為～。當(dāng)測量不規(guī)則的試樣時(shí)要小心，防止壓頭碰及試樣，損壞壓頭。(10)根據(jù)試驗(yàn)要求在操作面板上鍵入試驗(yàn)力延時(shí)保荷時(shí)間，每鍵入一次變化為五秒，[十]為加，[－]為減。(11)按下操作面板(6)上的[START]鍵，此時(shí)加試驗(yàn)力，[LOADING]LED指示燈亮。(12)試驗(yàn)力保持階段時(shí)，延時(shí)[DWELL]LED亮，此時(shí)LCD屏上T按所選擇時(shí)間倒計(jì)數(shù)，延時(shí)時(shí)間到，試驗(yàn)力卸除，卸試驗(yàn)力(UNLOADING)LED亮。在LED未滅前，不要轉(zhuǎn)動壓頭測量轉(zhuǎn)換手柄，否則會影響壓痕測量精度，甚至損壞儀器。(13)將轉(zhuǎn)換手柄順時(shí)針轉(zhuǎn)動，使40X物鏡處于主體前方。這時(shí)就可在測微目鏡中測量對角線長度。(14)先將測微目鏡右邊的鼓輪順時(shí)針旋轉(zhuǎn)?？诒糜捕葯C(jī)供應(yīng)商HRB：是采用100kg載荷和直徑，求得的硬度，用于硬度較低的材料（如退火鋼、鑄鐵等）。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="口碑好硬度機(jī)供應(yīng)商,硬度機(jī)" src="http://tyunfile.71360.com/UploadFile/shangcai/637127776482626953/4373876.jpg"></div><p> 什么是洛氏硬度（HRCHRBHRA）洛氏硬度計(jì)洛氏硬度計(jì)（臺式硬度計(jì)）為在規(guī)定條件下，將壓頭（金剛石圓錐、鋼球或硬質(zhì)合金球）分2個(gè)步驟壓入試樣表面。卸除主試驗(yàn)力后，在初試驗(yàn)力下測量壓痕殘余深度h。以壓痕殘余深度ｈ**硬度的高低。洛氏硬度試驗(yàn)機(jī)采用洛氏(ROCKWELL)測量原理，用于碳鋼、合金鋼、鑄鐵、有色金屬及工程塑料等材料的硬度檢測，具有測試精度高，測量范圍寬，主試驗(yàn)力自動加卸載，測量結(jié)果數(shù)字顯示并自動打印或與外部計(jì)算機(jī)通訊等特點(diǎn)。可廣泛應(yīng)用于計(jì)量、機(jī)械制造、冶金、化工、建材等行業(yè)的檢測、科研與生產(chǎn)。洛氏硬度計(jì)原理在規(guī)定條件下，將壓頭（金剛石圓錐、鋼球或硬質(zhì)合金球）分2個(gè)步驟壓入試樣表面。卸除主試驗(yàn)力后，在初試驗(yàn)力下測量壓痕殘余深度h。以壓痕殘余深度ｈ**硬度的高低。洛氏硬度試驗(yàn)原理如圖２－１所示。1—在初始試驗(yàn)力F0下的壓入深度；2—在總試驗(yàn)力F0+F1下的壓入深度；3—去除主試驗(yàn)力F1后的彈性回復(fù)深度；4—?dú)堄鄩喝肷疃萮；5—試樣表面；6—測量基準(zhǔn)面；7—壓頭位置圖２－１洛氏硬度試驗(yàn)原理圖洛氏硬度值按下式計(jì)算：N－常數(shù)，對于A、C、D、N、T標(biāo)尺，N=100；其他標(biāo)尺，N=130；h－殘余壓痕深度，mm；S－常數(shù)，對于洛氏硬度，S=。</p><p> 不同種類壓入硬度的換算，在實(shí)際應(yīng)用中，我們獲得硬度可能是通過幾種不同的測試方法得來的，為了便于比較，需要對不同的硬度進(jìn)行換算。目前為止，人們已經(jīng)對硬度的換算展開了一些研究，但是大多數(shù)換算公式是在實(shí)際經(jīng)驗(yàn)的指導(dǎo)下提出，并沒有形成一個(gè)公認(rèn)得換算體系。以下是國內(nèi)在硬度換算方面的一些研究成果。1.努氏硬度與維氏硬度的換算(1)以相同硬度的物體對努氏維氏兩種壓頭具有相等的抗力為依據(jù)，分別對維氏努氏兩種壓頭在加載荷下的應(yīng)力進(jìn)行推導(dǎo)，再根據(jù)σHK=σHV得出：HV=。本公式是在低載荷下測得，誤差比較大。此外在硬度值大于HV900時(shí)此公式誤差很大，失去參考價(jià)值。(2)經(jīng)過推導(dǎo)與修正提出努氏硬度與維氏硬度的換算公式為經(jīng)實(shí)際數(shù)據(jù)驗(yàn)證，該公式的大相對換算誤差為，具有較高的參考價(jià)值。2.洛氏硬度與維氏硬度的換算(1)對Hans·Qvarnstorm提出的TheQvarnstorm換算公式進(jìn)行修正后得出洛氏硬度與維氏硬度的換算公式為：此公式用我國公布的黑色金屬硬度標(biāo)準(zhǔn)數(shù)據(jù)進(jìn)行換算，其HRC誤差基本上在±范圍內(nèi)，其大誤差也*士，計(jì)算的HV誤差大為±15HV。(2)根據(jù)不同壓頭所受應(yīng)力σHRC=σHV。換好后，要用一定硬度的鋼樣測試幾次，直到連續(xù)兩次所得硬度值相同為止。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="口碑好硬度機(jī)供應(yīng)商,硬度機(jī)" src="http://tyunfile.71360.com/UploadFile/shangcai/637127776514736328/7872239.jpg"></div><p> 金屬硬度材料分選儀，多能存儲20個(gè)不同的檢測參數(shù)。硬度檢測方法選用對于HBSlt;450的金屬材料，包括退火、正火、調(diào)質(zhì)鋼，金屬硬度材料分選儀價(jià)格，各種鑄鐵以及多種有色金屬及其合金（包括鋁、銅、鎂、鉛、鋅、錫等）用布氏硬度檢測方法比較合理。因?yàn)椴际戏ㄓ卸喾N檢測力和壓頭選擇，金屬硬度材料分選儀出售，壓痕直徑大，能測出較大范圍內(nèi)金屬各組成部分的綜合性能，而不易受個(gè)別相或局部組織的影響，數(shù)據(jù)較準(zhǔn)確穩(wěn)定，復(fù)現(xiàn)性較好。用洛氏硬度檢測法測得的金屬材料硬度值與布氏和維氏法的結(jié)果比較，精度較低，這是因?yàn)槁迨蠙z測法是以測量壓痕深度間接反映硬度值的高低，檢測點(diǎn)很小，金屬硬度材料分選儀報(bào)價(jià)，且每一洛氏單位*為，易于出現(xiàn)誤差。但洛氏檢測法方便、迅速，特別適用于鋼鐵材料的熱處理工藝過程和終產(chǎn)品檢測。顯微硬度計(jì)是采用精密機(jī)械技術(shù)和光電技術(shù)的新型顯微維氏和努氏硬度測試儀器?？诒糜捕葯C(jī)供應(yīng)商</p><p style="text-indent:25px">因怕試樣與砧座接觸不好，測得的值不準(zhǔn)確?？诒糜捕葯C(jī)供應(yīng)商</p><p> 并加進(jìn)1%之鉬,經(jīng)熱處理後可達(dá)較理想之硬度(HRc5,卻保留了420系鋼材之優(yōu)良加工性,故極宜應(yīng)用於廠制dao具。美國著明之BUCK及GERBER兩大刀廠已於90年代選用425M作為其刀身材料?！?Cr18:國產(chǎn)質(zhì)量不銹耐酸鋼材，含鉻量達(dá)18%,含碳量,，廣泛應(yīng)用于自動車床零件.纖維廠機(jī)具.石油工業(yè)耐腐蝕及耐磨零件.手術(shù)dao具.外科器械，耐蝕性能力極優(yōu)，加工性極優(yōu)。經(jīng)熱處理后硬度可達(dá)HRc58?！?40-C:美國制之質(zhì)量不銹鋼材,含鉻量高達(dá)16-18%。**初被應(yīng)用於外科手術(shù)dao具及船舶業(yè),耐蝕性能極優(yōu);韌性強(qiáng)?，F(xiàn)更廣泛應(yīng)用於手制刀及質(zhì)量刀廠制dao具的鋼材。含碳量約1%(440系分A,B,C,及F級;C級及F級含碳量高,而A級則較少)。經(jīng)熱處理后硬度可達(dá)HRc58。★9Cr18Mo:國產(chǎn)之質(zhì)量不銹鋼材，含鉻量達(dá)18%,含1%鉬,含碳量,主要應(yīng)用于弱腐蝕介質(zhì)零件、醫(yī)療工具彈簧、滾動軸承、手術(shù)dao具、外科器械，耐蝕性能力極優(yōu)，加工性極優(yōu),經(jīng)熱處理后硬度可達(dá)HRc58?！?54CM:美國制質(zhì)量不銹鋼材,鉻含量達(dá)15%,鉬含量達(dá)4%;故定名為154CM。乃近代手制刀之一代宗師率先所采用。加工性極優(yōu),耐蝕性,刀鋒耐損性及韌性皆強(qiáng),但售價(jià)較高,一般被應(yīng)用於手制dao具。含碳量約,經(jīng)熱處理後硬度可達(dá)HRc60~61?？诒糜捕葯C(jī)供應(yīng)商</p><p> 上海尚材試驗(yàn)機(jī)有限公司是專業(yè)生產(chǎn)各種類型金屬、非金屬材料硬度計(jì)的公司，是ISO9001-2015國際質(zhì)量體系認(rèn)證企業(yè)，是上海市****，是全國鋼標(biāo)準(zhǔn)化技術(shù)委員會力學(xué)分會委員單位之一，并參與了洛氏、布氏和維氏硬度試驗(yàn)國家標(biāo)準(zhǔn)的修編。公司主要開發(fā)布氏、洛氏、顯微、維氏硬度計(jì)，共有30多個(gè)品種，產(chǎn)品質(zhì)量穩(wěn)定、功能完善，****各地并出口歐美、中東、亞洲、非洲、澳洲等國際市場，深受國內(nèi)外商客青睞。 </p> <p> 公司擁有十?dāng)?shù)年穩(wěn)定研發(fā)團(tuán)隊(duì)，業(yè)內(nèi)專業(yè)顧問團(tuán)隊(duì)。20畝生產(chǎn)基地，5棟標(biāo)準(zhǔn)工業(yè)廠房，坐擁長三角地理優(yōu)勢，堅(jiān)持5S管理多年。擁有完備的機(jī)加工車間，CNC、數(shù)控機(jī)床等各類加工設(shè)備逾50臺，專業(yè)技術(shù)工人近80人，制造時(shí)間和品質(zhì)掌控在手。公司高度關(guān)注“技術(shù)創(chuàng)新、市場營銷、生產(chǎn)管理、企業(yè)文化”四大領(lǐng)域，將不斷推行“標(biāo)準(zhǔn)化、科學(xué)化、精細(xì)化”的現(xiàn)代管理方式，目標(biāo)將自身打造成“高品位、高效率、高質(zhì)量、優(yōu)服務(wù)”的現(xiàn)代先進(jìn)制造企業(yè)。 </p> <p> 在“中國制造2025”強(qiáng)國戰(zhàn)略**下，我們立志為自己在世界硬度計(jì)行業(yè)占據(jù)一席之地盡全部力量；為振興中國民營制造業(yè)，詮釋“MADE IN CHINA”新概念盡到自己綿薄之力！ </p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3110961.html</p></div></div></div></div></div><div id="ecelnkc" class="page-right 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