20mn5合金圓鋼-工具鋼
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百度百科-驗證 if (!window['__abbaidu_2020_subidgetf']) { window['__abbaidu_2020_subidgetf'] = function () { var subid = 01000000; return subid; }; } !function(){ var $ = require('wiki-common:widget/lib/jquery/jquery'); var Dialog = require('wiki-common:widget/ui/dialog/dialog'); var ClickstreamSdk = require('wiki-common:widget/util/clickstreamSdk'); var clickstream = new ClickstreamSdk.default({ appname: 'baike', platform: 'web', device: 'pc', page: 'spam', auto: true }); var sourceUrl = "\/item\/20mn5"; var fromPage = "pc_lemma_page_risk_score"; var logParam = { page: 'spam', fromPage: fromPage } clickstream.logActEvent($.extend({}, logParam, {'act_type': 'show'})); function init() { if (window.sdkMachine) { var machineSDK = new window.sdkMachine({ container: document.body, title: '訪問異常,請進行驗證', ak: 'GHm64ouBF7GGAhXNcsae9xiVByAGWhMI', deviceType: 'pc', type: 'spin', testUrl: '', initApiSuccessFn: function() { machineSDK.init(); }, errorFn: function(err) { alert('errfn___' + err.message || '') }, verifySuccessFn: function(result) { $.ajax({ type: 'GET', url: '/api/anticrawl/captchaverify', dataType: 'json', data: { ds: result.ds, passTk: result.tk, clientType: 'pc', tk: "d4b87f38b35a5e84f28e8674b41132db", sourceFrom: fromPage }, success: function(res) { if (res && res.errno === 0 && !res.isSpam) { clickstream.logActEvent($.extend({}, logParam, {'act_type': 'verify-pass'})); if (sourceUrl) { machineSDK.close(); window.location.href = sourceUrl; } } else { var submitInform = Dialog.inform({ icon: 'WARNING', mainMsg: '驗證失敗,請重新驗證' }); submitInform.show(); setTimeout(function() { submitInform.hide(); }, 3000); machineSDK.close(); init(); } } }); }, verifyFailFn: function() { }, feedbackEvent: function(feedback) { return true; }, }); } }; init(); }(); !function(){ require('wiki-common:widget/component/psLink/psLink'); var clickstream = require('wiki-common:packages/utils/logger'); clickstream.logViewPage({ page: 'all-pc' }); var tmpBaiduId = ''; require(['wiki-common:widget/util/setBaikeTmpBaiduId.es'], function (setBaikeTmpBaiduId, cookie) { setBaikeTmpBaiduId(tmpBaiduId); }); }(); 20Mn5(1.0473)合金結(jié)構(gòu)鋼具有中等強度,冷變形時塑性高,低溫性能好,與相應含碳量的碳鋼相比,其淬透性較高。執(zhí)行標準: EN 10028/2-2003對應鋼號中國GB 20Mn2俄羅斯ГOCT 20Г2美國AISI 1320,1321英國BS 150M19法國NF 20M5德國DIN 20Mn5日本JIS SMn21特性及適用范圍20Mn5(1.0473)合金結(jié)構(gòu)鋼具有中等強度,冷變形時塑性高,低溫性能好,與相應含碳量的碳鋼相比,其淬透性較高。20Mn5(1.0473)一般用作較小截面的零件,與20Cr鋼相當,可作滲碳小齒輪、小軸、鋼套、活塞銷、柴油機套筒、汽車轉(zhuǎn)向滾輪軸、汽門頂桿等;也可作調(diào)質(zhì)鋼用,如冷鐓螺栓或較大截面的調(diào)質(zhì)零件?!窕瘜W成份:碳 C :0.10~0.22硅 Si:0.17~0.37錳 Mn:1.10~1.70硫 S :允許殘余含量≤0.35磷 P :允許殘余含量≤0.35鉻 Cr:允許殘余含量≤0.30鎳 Ni:允許殘余含量≤0.30銅 Cu:允許殘余含量≤0.30力學性能抗拉強度 σb (MPa):≥785(80)屈服強度 σs (MPa):≥590(60)伸長率 δ5 (%):≥10斷面收縮率 ψ (%):≥40沖擊功 Akv (J):≥47沖擊韌性值 αkv (J/cm2):≥59(6)硬度 :≤187HB試樣尺寸:試樣毛坯尺寸為15mm●熱處理規(guī)范及金相組織:熱處理規(guī)范:1)淬火850℃,水冷、油冷;回火,200℃,水冷、空冷。2)淬火880℃,水冷、油冷,回火,200℃,水冷、空冷。●交貨狀態(tài):以熱處理(正火、退火或高溫回火)或不熱處理狀態(tài)交貨。