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鍛件機械性能與熱(re)處理(li)和充氫(qing)狀態(tai)的關系(xi)

文章來源：sjzwx 更(geng)新時(shi)間：2014-02-18 09:32:18

 機械(xie)性(xing)能與(yu)熱(re)處(chu)(chu)理(li)(li)和(he)(he)充(chong)(chong)氫狀態(tai)(tai)的(de)關系(xi)，為(wei)前(qian)述(shu)抉態(tai)(tai)的(de)試(shi)(shi)樣(yang)(yang)(yang)經敏化處(chu)(chu)理(li)(li)，在(zai)233K(一(yi)(yi)(yi)40r:試(shi)(shi)驗得到的(de)應(ying)(ying)力一(yi)(yi)(yi)應(ying)(ying)變(bian)(bian)(bian)曲(qu)(qu)線(xian)(xian)(xian)。曲(qu)(qu)場。叨線(xian)(xian)(xian)表(biao)(biao)明(ming)拉伸強(qiang)(qiang)度(du)減(jian)小(xiao)(xiao)約(yue)3%，延伸率(lv)(lv)減(jian)少也(ye)近(jin)似這個數值(zhi)。一(yi)(yi)(yi)在(zai)上(shang)還溫(wen)(wen)度(du)對未敏化試(shi)(shi)樣(yang)(yang)(yang)進(jin)行(xing)同樣(yang)(yang)(yang)的(de)試(shi)(shi)驗，結果表(biao)(biao)明(ming)敏化處(chu)(chu)理(li)(li)沒有明(ming)顯(xian)影響。試(shi)(shi)驗沮度(du)為(wei)77K〔一(yi)(yi)(yi)14601時(shi)，其應(ying)(ying)力一(yi)(yi)(yi)應(ying)(ying)變(bian)(bian)(bian)曲(qu)(qu)線(xian)(xian)(xian)如(ru)圖(tu):3。圖(tu)中(zhong)繪有三條曲(qu)(qu)線(xian)(xian)(xian)，一(yi)(yi)(yi)條曲(qu)(qu)線(xian)(xian)(xian)為(wei)充(chong)(chong)氫后(hou)，再(zai)經573K(300`1C)‘36ks(1h)脫(tuo)氫狀態(tai)(tai)。曲(qu)(qu)線(xian)(xian)(xian)表(biao)(biao)明(ming)，充(chong)(chong)氫處(chu)(chu)理(li)(li)后(hou)，拉伸強(qiang)(qiang)度(du)和(he)(he)延伸率(lv)(lv)各減(jian)少一(yi)(yi)(yi)半，脫(tuo)氫不能完全恢復由于充(chong)(chong)氫減(jian)少的(de)塑(su)性(xing)。是未敏化處(chu)(chu)理(li)(li)試(shi)(shi)樣(yang)(yang)(yang)的(de)應(ying)(ying)力一(yi)(yi)(yi)應(ying)(ying)變(bian)(bian)(bian)曲(qu)(qu)線(xian)(xian)(xian)，試(shi)(shi)驗溫(wen)(wen)度(du):233k(-WO級化處(chu)(chu)理(li)(li)介詞(ci)應(ying)(ying)變(bian)(bian)(bian)%圖(tu)2在(zai)233K(一(yi)(yi)(yi)毛(mao)。℃)時(shi)0化試(shi)(shi)樣(yang)(yang)(yang)(術充(chong)(chong)氣充(chong)(chong)氧(yang)權態(tai)(tai))的(de)應(ying)(ying)允一(yi)(yi)(yi)應(ying)(ying)變(bian)(bian)(bian)曲(qu)(qu)線(xian)(xian)(xian)其充(chong)(chong)氫作用4f'常明(ming)顯(xian)，但遠小(xiao)(xiao)于敏化試(shi)(shi)樣(yang)(yang)(yang)。一(yi)(yi)(yi)前(qian)述(shu)充(chong)(chong)氫和(he)(he)未充(chong)(chong)氫試(shi)(shi)樣(yang)(yang)(yang)在(zai)223K(圖(tu)2)和(he)(he)在(zai)井(jing)K(圖(tu)3和(he)(he)圖(tu)4)的(de)試(shi)(shi)驗表(biao)(biao)明(ming)，塑(su)性(xing)減(jian)少程度(du)與(yu)試(shi)(shi)驗溫(wen)(wen)度(du)、試(shi)(shi)樣(yang)(yang)(yang)熱(re)處(chu)(chu)理(li)(li)狀態(tai)(tai)和(he)(he)脫(tuo)氫等因素有密切關系(xi)。