亚洲精品鲁一鲁一区二区三区-最爽无遮挡行房视频-强壮的公次次弄得我高潮A片日本-精品人妻无码一区二区三区换脸-中文字幕亚韩-亚洲国产精品一区二区第一页-丰满岳乱妇一区二区三区-大陆极品少妇内射AAAAAA-国产乱人伦AV麻豆网-AV国産精品毛片一区二区三区-午夜精品视频在线无码-免费精品一区二区三区A片在线-在线天堂无限次观看,亚洲日韩无码一区二区,中文字幕乱人伦视频在线,亚洲欧美熟妇综合久久久久久,少妇无码一区二区三区免费久久,欧美黑人一级片在线观看,久久久精品无码一区三区,国产视频在线观看蜜芽,大香蕉五月婷婷精品视频 ,久草精品在线,国产无码在线播放一区二区,囯产无码交换大片在线播放,八戒八戒在线高清观看视频 ,娇妻被又粗又长又猛玩,国产曰肥老太婆无遮挡,国产剧情黄色,国产成年无码久久久久毛片資訊,大香蕉太香蕉成人现现,逼逼爱爱爱无码免费观看,亚州色图欧美图片自偷自拍,碰碰视频麻豆,午夜一本,一起射综合影院,黑人干熟女,欧洲高清转码区一二区 ,国产高清视频色拍,粉嫩无码小泬无套在线观看,大香蕉在线网站,成人做爰理论片,成人漫,9l视频自拍九色9l成人

Spiral air duct is a thin pipe with spiral undercut made of metal strip material roll. It is round without welding. It is often used for air supply and fresh air gas flow transportation to replace the white iron pipe in the past. At present, in the market, stainless steel materials are more favored by the market. The main reason is that most people should understand the characteristics of stainless steel. It is not easy to rust and corrode. But the material with this characteristic will inevitably encounter the difficulty of cutting

1.切割力大，切割溫度高。本實用新型材料強度大，切削時切向應力大，塑性變形大，因而切削力大。另外，材料的導熱性很差，導致切削溫度升高，高溫往往集中于刀刃附近較窄的區域，從而加速其磨損。

1. Large cutting force and high cutting temperature. The utility model has the advantages of high material strength, large tangential stress and large plastic deformation during cutting, so the cutting force is large. In addition, the thermal conductivity of the material is very poor, resulting in the increase of cutting temperature. The high temperature is often concentrated in the narrow area near the blade, so as to accelerate its wear.

2.不銹鋼風管加工硬化嚴重。奧氏體不銹鋼及部分高溫合金不銹鋼均為奧氏體組織，切削時易發生加工硬化，加工硬化傾向于高出普通碳鋼數倍，刀具在加工硬化區域內切削，壽命縮短。

2. Severe work hardening of stainless steel air duct. Austenitic stainless steel and some high-temperature alloy stainless steel are austenitic structure, which is prone to work hardening during cutting. The work hardening tends to be several times higher than that of ordinary carbon steel. The service life of the tool is shortened when cutting in the work hardening area.

3.容易粘刀。對于奧氏體不銹鋼和馬氏體不銹鋼，都有切屑強韌、切削溫度很高的特點。強力韌性的切屑流經前刀面時，會出現粘合、熔焊等粘刀現象，影響加工配件表面粗糙度。

3. It is easy to stick the knife. Both austenitic stainless steel and martensitic stainless steel have the characteristics of strong and tough chip and high cutting temperature. When strong and tough chips flow through the rake face, there will be adhesion, fusion welding and other adhesion phenomena, which will affect the surface roughness of machined accessories.

4.刀具磨損會加速。以上物料普遍含有高熔點，塑性大，切削溫度高，使其磨損加速，磨刀、換刀頻繁，從而影響生產效率，提高其使用成本。以降低切割線速度、進給量為主。使用特殊的不銹鋼或高溫合金加工刀具，鉆、攻絲或內冷較好。

4. Tool wear will accelerate. The above materials generally contain high melting point, large plasticity and high cutting temperature, which accelerate their wear and frequently grind and change knives, thus affecting the production efficiency and improving their use cost. Mainly to reduce the cutting line speed and feed rate. Using special stainless steel or superalloy cutting tools, drilling, tapping or internal cooling is better.