20mncr5_20mncr5圓鋼_20mncr5價格特種鋼板-優(yōu)特鋼
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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\/20mncr5_20mncr5%E5%9C%86%E9%92%A2_20mncr5%E4%BB%B7%E6%A0%BC"; 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(jìn)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); }); }(); ★20mncr5執(zhí)行標(biāo)準(zhǔn):DIN17200-1986 ★化學(xué)成份:注:具體化學(xué)成分以鋼廠質(zhì)保書為準(zhǔn)。20mncr5碳C:0.17~0.2220mncr5硅Si:≤0.2520mncr5錳Mn:1.10~1.5020mncr5硫S:0.010~0.03520mncr5磷P:≤0.03520mncr5鉻Cr:1.00~1.30 ★力學(xué)性能:注:具體力學(xué)性能以鋼廠質(zhì)保書為準(zhǔn)??估瓘?qiáng)度σb(MPa):1482屈服強(qiáng)度σ0.2(MPa):1232伸長率δ5(%):13斷面收縮率ψ(%):57沖擊韌性值αku(J/cm2):73硬度:356HB熱處理規(guī)范及金相組織:熱處理規(guī)范:900℃油淬+870℃油淬,200℃回火。 ★20mncr5用 途:制造在高速和高彎曲負(fù)荷工作條件下汞的軸和連桿、無強(qiáng)力沖擊負(fù)荷的齒輪汞、水汞轉(zhuǎn)子、離合器、高壓容器蓋板的螺栓等。 ★20mncr5特性:為從德國引進(jìn)的鋼號,是滲碳鋼類,也可作調(diào)質(zhì)鋼用。淬透性較好,熱處理變形小,低溫韌性好,切削加工性能良好,但焊接性較差。可作滲碳件和截面較大、負(fù)荷較高的調(diào)質(zhì)件,如齒輪、軸類、蝸桿、套筒、摩擦輪等。 ★適用范圍:強(qiáng)度、韌性均高,淬透性良好。熱處理后所得到的性能優(yōu)于20Cr。淬火變形小,低溫韌性良好,切削加工性較好;但焊接性能低。一般在滲碳淬火或調(diào)質(zhì)后使用。 用于制造和重載大截面的調(diào)質(zhì)零件及小截面的滲碳零件,還可用于制造中等負(fù)載、沖擊較小的中小零件,如齒輪、軸、主軸、變速裝備的摩擦輪、蝸桿、調(diào)速器的套筒等。