<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; COLOR: black; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;"><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">3、铸铁</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;"><br/></span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">对铸件,切削速度大于</span><chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="350" unitname="m" wst="on"></chmetcnv><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">350m</span><chmetcnv></chmetcnv><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">/min</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">时,称为高速加工,切削速度对刀具的选用有较大影响。当切削速度低于</span><chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="750" unitname="m" wst="on"></chmetcnv><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">750m</span><chmetcnv></chmetcnv><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">/min</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">时,可选用涂层硬质合金、金属陶瓷;切削速度在</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">510</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">~</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">2000m/min</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">时,可选用</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">Si3N4</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">陶瓷刀具;切削速度在</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">2000</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">~</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">4500m/min</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">时,可使用</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">CBN</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">刀具。</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;"> </span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">铸件的金相组织对高速切削刀具的选用有一定影响,加工以珠光体为主的铸件在切削速度大于</span><chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="500" unitname="m" wst="on"></chmetcnv><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">500m</span><chmetcnv></chmetcnv><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">/min</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">时,可使用</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">CBN</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">或</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">Si3N4</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">,当以铁素体为主时,由于扩散磨损的原因,使刀具磨损严重,不宜使用</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">CBN</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">,而应采用陶瓷刀具。如粘结相为金属</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">Co</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">,晶粒尺寸平均为</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">3µm</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">,</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">CBN</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">含量大于</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">90%</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">~</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">95%</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">的</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">BZN6000</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">在</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">V=<chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="700" unitname="m" wst="on"></chmetcnv>700m<chmetcnv></chmetcnv>/min</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">时,宜加工高铁素体含量的灰铸铁。粘结相为陶瓷</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">(AlN</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">+</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">AlB2)</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">、晶粒尺寸平均为</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">10µm</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">、</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">CBN</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">含量为</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">90%</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">~</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">95%</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">的</span><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">Amborite</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">刀片,在加工高珠光体含量的灰铸铁时,在切削速度小于</span><chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="1100" unitname="m" wst="on"></chmetcnv><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">1100m</span><chmetcnv></chmetcnv><span lang="EN-US" style="FONT-SIZE: 13.5pt; FONT-FAMILY: Tahoma; mso-font-kerning: 0pt;">/min</span><span style="FONT-SIZE: 13.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma;">时,随切削速度的增加,刀具寿命也增加。</span><span lang="EN-US" style="FONT-FAMILY: Tahoma; mso-font-kerning: 0pt; mso-bidi-font-size: 10.5pt;"><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; COLOR: black; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;"></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; COLOR: black; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-list: l0 level1 lfo1; tab-stops: list 36.0pt;"></p>
[此贴子已经被作者于2007-1-7 17:49:18编辑过]
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