溫(wen)(wen)度(du)(du)(du)(du)(du)(du)(du)越高，溶解(jie)(jie)和(he)擴散速率(lv)就越快，被一定量(liang)的(de)Co溶解(jie)(jie)的(de)WC就越多，即細WC向粗WC遷(qian)移的(de)速度(du)(du)(du)(du)(du)(du)(du)加快。過高的(de)燒(shao)(shao)結溫(wen)(wen)度(du)(du)(du)(du)(du)(du)(du)易產生(sheng)異常的(de)晶(jing)粒(li)(li)長大(da)。在較低(di)溫(wen)(wen)度(du)(du)(du)(du)(du)(du)(du)下延(yan)長燒(shao)(shao)結時(shi)間(jian)，同樣可(ke)以使晶(jing)粒(li)(li)長大(da)。可(ke)見燒(shao)(shao)結溫(wen)(wen)度(du)(du)(du)(du)(du)(du)(du)和(he)時(shi)間(jian)可(ke)以互補(bu)。通(tong)過調整溫(wen)(wen)度(du)(du)(du)(du)(du)(du)(du)或(huo)時(shi)間(jian)可(ke)以獲得相同的(de)WC晶(jing)粒(li)(li)度(du)(du)(du)(du)(du)(du)(du)。燒(shao)(shao)結溫(wen)(wen)度(du)(du)(du)(du)(du)(du)(du)對碳化(hua)鎢晶(jing)粒(li)(li)長大(da)的(de)影響(xiang)。平均(jun)粒(li)(li)度(du)(du)(du)(du)(du)(du)(du)增大(da)時(shi)，晶(jing)粒(li)(li)長大(da)迅(xun)速下降，平均(jun)粒(li)(li)度(du)(du)(du)(du)(du)(du)(du)為3um或(huo)3um以上(shang)時(shi)，晶(jing)粒(li)(li)長大(da)對燒(shao)(shao)結溫(wen)(wen)度(du)(du)(du)(du)(du)(du)(du)不大(da)敏感，在很(hen)寬(kuan)的(de)燒(shao)(shao)結溫(wen)(wen)度(du)(du)(du)(du)(du)(du)(du)范圍內，其粒(li)(li)度(du)(du)(du)(du)(du)(du)(du)或(huo)機械性能變(bian)化(hua)很(hen)小。
keyword：硬質合金模具
文章(zhang)來源(yuan)：//ewgqe.com/
