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新聞内容： <P>沧州碳钢弯头工艺流程，河北乾特管道设备有限公司<SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(100,100,100); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal"><FONT color=#000000>是河北一家大型的</FONT><A href="http://www.hbjjnnj.cn/index.html" target=_blank><STRONG>管件厂家</STRONG></A></SPAN><SPAN style="FONT-WEIGHT: normal; BACKGROUND: rgb(255,255,255); WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体; WHITE-SPACE: normal; LETTER-SPACING: 0pt; WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal"><STRONG>、</STRONG><A href="http://www.hbjjnnj.cn/wantou/index.html" target=_blank><STRONG>弯头厂家</STRONG></A><STRONG>、</STRONG><A href="http://www.hbjjnnj.cn/sregerh/index.html" target=_blank><STRONG>法兰厂家</STRONG></A>，主要生产：<A href="http://www.hbjjnnj.cn/wantou/duihanwantou/index.html" target=_blank><STRONG>对焊弯头</STRONG></A><STRONG>、</STRONG><A href="http://www.hbjjnnj.cn/wantou/tangangwantou/index.html" target=_blank><STRONG>碳钢弯头</STRONG></A>等产品</SPAN>。公司产品广泛应用于石油、化工、造纸、制药、食品、啤酒、电力、造船、天然气等行业，了解更多详情欢迎登录<SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(63,63,63); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal">：<SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(100,100,100); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体, verdana, arial, helvetica, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal"><A href="http://www.hbjjnnj.cn/Index.html">http://www.hbjjnnj.cn/Index.html</A></SPAN></SPAN></P> <P><SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(63,63,63); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal"><SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(100,100,100); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体, verdana, arial, helvetica, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal">无缝弯头:弯头是用于管道转弯处的一种管件。在管道系统所使用的全部管件中，所占比例最大，约为80%。通常，对不同材料或壁厚的弯头选择不同的成形工艺。制造厂常用的无缝弯头成形工艺有热推、冲压、挤压等。<BR>热推成形<BR>热推弯头成形工艺是采用专用弯头推制机、芯模和加热装置，使套在模具上的坯料在推制机的推动下向前运动，在运动中被加热、扩径并弯曲成形的过程。 热推弯头的变形特点是根据金属材料塑性变形前后体积不变的规律确定管坯直径，所采用的管坯直径小于弯头直径，通过芯模控制坯料的变形过程，使内弧处被压缩的金属流动，补偿到因扩径而减薄的其它部位，从而得到壁厚均匀的弯头。<BR>热推弯头成形工艺具有外形美观、壁厚均匀和连续作业，适于大批量生产的特点，因而成为碳钢、合金钢弯头的主要成形方法，并也应用在某些规格的不锈钢弯头的成形中。<BR>成形过程的加热方式有中频或高频感应加热（加热圈可为多圈或单圈）、火焰加热和反射炉加热，采用何种加热方式视成形产品要求和能源情况决定。<BR>冲压成形<BR>冲压成形弯头是最早应用于批量生产无缝弯头的成形工艺，在常用规格的弯头生产中已被热推法或其它成形工艺所替代，但在某些规格的弯头中因生产数量少、壁厚过厚或过薄。”</SPAN></SPAN></P> <P><SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(63,63,63); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal"><SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(100,100,100); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体, verdana, arial, helvetica, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal"><IMG alt=美标弯头 src="http://www.hbjjnnj.cn/upfiles/proimages/201791210464776398.jpg"></SPAN></SPAN></P> <P><SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(63,63,63); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal"><SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(100,100,100); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体, verdana, arial, helvetica, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal">上一条：<A title=河北大型管件厂家超值出售高质量对焊弯头 href="http://www.hbjjnnj.cn/NEWS/2422.html" target=_blank>河北大型管件厂家超值出售高质量对焊弯头</A></SPAN></SPAN></P> <P><SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(63,63,63); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal"><SPAN style="FONT-WEIGHT: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; COLOR: rgb(100,100,100); TEXT-INDENT: 0px; FONT-STYLE: normal; FONT-FAMILY: 宋体, verdana, arial, helvetica, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); WIDOWS: 2; ORPHANS: 2; webkit-text-stroke-width: 0px; font-variant-ligatures: normal; font-variant-caps: normal">下一条：<A title=对焊弯头焊后硬化性较大，容易产生裂纹 href="http://www.hbjjnnj.cn/NEWS/2425.html" target=_blank>对焊弯头焊后硬化性较大，容易产生裂纹</A></SPAN></SPAN></P>

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