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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\/40CR"; 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); }); }(); 40cr 40Cr是我國GB的標準鋼號，40Cr鋼是機械制造業(yè)使用最廣泛的鋼之一。調(diào)質(zhì)處理后具有良好的綜合力學性能，良好的低溫沖擊韌性和低的缺口敏感性。鋼的淬透性良好，水淬時可淬透到Ф28~60mm,油淬時可淬透到Ф15~40mm。這種鋼除調(diào)質(zhì)處理外還適于氰化和高頻淬火處理。切削性能較好，當硬度為174~229HB時，相對切削加工性為60%。該鋼適于制作中型塑料模具。硬度HRC32-36 化學成分C，Si，Mn，Cr，Ni，P，S，Cu冷卻劑水、油、鹽根據(jù)標準GB/T 3077-2015 及GB/T 17107-1997、鋼板GB/T11251-2009及舞陽企業(yè)標準對應國外標準:JIS(日本): SCr440 ASTM(美國): 5140 ISO: 41Cr4折疊化學成分C:0.37~0.44Si:0.17~0.37Mn:0.50~0.80Cr:0.80~1.10Ni:≤0.30P:≤0.030S:≤0.030Cu:≤0.30Mo:≤0.10折疊力學性能試樣毛坯尺寸(mm):25熱處理:第一次淬火加熱溫度(℃):850;冷卻劑:油第二次淬火加熱溫度(℃):-回火加熱溫度(℃):520;抗拉強度(σb/MPa):≥980屈服點(σs/MPa):≥785斷后伸長率(δ5/%):≥9斷面收縮率(ψ/%):≥45沖擊吸收功(Aku2/J):≥47布氏硬度(100/3000HBS)(退火或高溫回火狀態(tài)):≤207