Hubei Jingsheng Trading CO., Ltd, established in 2001, specialize in all kinds of steel related products, mainly including resources like slab billet, square billet, coating steel, iron ore, steel scrap , and also finished products hot-roll steel plate/coil, cold-roll steel plate/coil, medium plate, medium thick plate, thick-width steel plate, I-beam and channel steel.

公司簡介：湖北景盛貿(mào)易有限公司主要從事鋼材系列產(chǎn)品的大宗貿(mào)易交易国产精品视频综合区。公司主要經(jīng)營：板坯亚洲综合另类图片久久、方坯忍住就让你无套精品国产、彩板www.手机无码视频、礦石、廢鋼等日日摸日日碰夜夜爽97无码，同時(shí)以冷熱軋板天天色天天吹天天操天天日天天爽、中板、工槽鋼等品種為輔免费看三级网站。

The character and distribution rule of CC round billet internal defect are analyzed and the relation between the defect and process parameters are found, which provide the reference for the billet quality improvement.

本文分析了包鋼連鑄圓坯內(nèi)部缺陷的特征及分布規(guī)律中文字幕36页，找出了內(nèi)部缺陷與生產(chǎn)工藝參數(shù)之間的關(guān)系sese亚洲图片，為改善圓坯質(zhì)量提供了依

In order to produce the billet without surface defect under high casting speed and to raise the ratio of DHR or HDCR operation and reduce defect ratio of the final products, soft contact EMCC (Electromagnetic Continuous Casting) technique by imposing high frequency electromagnetic field on the molten steel meniscus region has been developed. This technique is used to control the initial solidification of the billet.

為了在高拉速條件下生產(chǎn)出無表面缺陷的鑄坯，以進(jìn)一步增大鑄坯HDR或DHCR的操作比率黄色视频条乱、提高最終產(chǎn)品的無缺陷率，連鑄技術(shù)工作者開發(fā)出利用高頻交變磁場對鑄坯初始凝固過程進(jìn)行控制的軟接觸電磁連鑄技術(shù)强奸熟女的视频。

The 11 kinds of surface crack features of round cast billet formed by high casting temperature, mould flux lubricating film un-uniform at billet shell, unstale casting speed, tundish nozzle eccentric, alloy steel cast billet cooling and reheating speed overhigh, deleterious elements Pb,Sn,As,Sb and Bi residual content in steel over standard requirements and mould copper tube shifting,...

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When the billet reduces by 25% in height, the effect of densification for the billet is better, the maximum relative density is 98%.

在315T液壓機(jī)上實(shí)現(xiàn)了高向?yàn)?00 mm的多孔材料的致密化加工人人草人人爱人人色。

The results indicated that during the pressure-keeping stage, the temperature field distributed evenly at the surface and inner part of the billet. In the extrusion process, however, they fluctuated tempestuously which lead to partial overheating on billet surface and result in superficial crack. The flaw analysis and forecast were validated to the experimental result of extruded product.

模擬結(jié)果表明，坯料內(nèi)部和表面的溫度場在保壓過程中分布均勻免费A级毛片无码免费视频120，而在擠壓過程中則隨時(shí)間推移而劇烈波動(dòng)200av天堂，從而造成坯料表面局部過熱，由此導(dǎo)致制件表面龜裂現(xiàn)象的發(fā)生欧美精品三级在线看一区。

Heating billet temperature cannot be detected in the hearth. Only by detecting temperatures of the stove side or hearth with estimation from mere experience could lead to great error on the measurement of billet temperature and affect the quality of post-processing accordingly; Overheating also exists in the heating process, and the quality of product is sway by overheating oxidation. Though infrared thermoscope is used to detect the temperature of billet when it is taken out of the stove, precision is still affected because of the oxide layer on the surface.

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According to the case of billet heating in a regenerative type heating furnace, the temperature distributing of billet about upper surface, undersurface and center surface in length and width is studied by computational fluid dynamicsin this article, and the questions of billet such as different temperature of upper surface and undersurface, the higher temperature of foursquare margin and the lower temperature of tapping orifice are put forward.

中文摘要：借助CFD仿真手段，模擬蓄熱式加熱爐內(nèi)鋼坯加熱的實(shí)際狀況自偷自拍亚洲综合精品图片，研究了鋼坯長度国产伦精品一区二区三区视频播放、寬度方向上下表面和中心溫度的溫度分布，提出鋼坯存在上下溫差jizzjizz11、四角邊緣溫度高和靠近出鋼口鋼坯溫度低等問題无尽xxxxx。

This paper introduces the main equipments of this system, such as pinch roll, billet descaling, billet welding; burring; movable roller bed; billet insulation and welder hydraulic station, etc.

介紹了無頭軋制系統(tǒng)的夾送輥国产私拍精品国模在线、鈉坯除鱗、鋼坯焊接国产亚洲福利国产亚洲、毛刺清理2022最新理论片韩国在线看、活動(dòng)輥道、鋼坯保溫欧美爱爱视频免费、焊機(jī)液壓站等主要裝置影音色资源。

The experiment and the research indicate that:(1) Through the Hot-Continuous-Rolling production technics under small reduction ratio of 4.04 and 5.08, the rectangular continuous-casting billet of 235×265mm can be used to produce big size steel stick of Φ140mm and Φ 125mm whose macrostructure and mechanical properties meet the standards, this technics is viable;(2) This rolling technics can make the deformation penetrate to the center of the billet by low temperture and low velocity and big roller diameter and large reduction quantity at every pass and optimum design and arrangement of rollers, which is the key of Hot-Continuous-Rolling technics under small reduction ratio;(3) The sending technics used in Xining Special Steel Co.,Ltd can not use waste-heat of billet adequately, but the sensitive temperature section of A1N or sulphides or inclusions separating out is avoided, creating a favorablecondition for insuring good surface quality of final rolled steel;(4) The Hot-Continuous-Rolling technics under small reduction ratio has a close relationship with the billet quality control and the hot sending process control and the cooling control after rolling.

通過實(shí)驗(yàn)研究表明：(1) 235×265mm矩形連鑄坯分別采用4.04和5.08的小壓縮比熱連軋生產(chǎn)工藝，所生產(chǎn)的Φ140mm和Φ125mm的大規(guī)格棒材99超碰在线公开视，其低倍組織和機(jī)械性能均符合標(biāo)準(zhǔn)要求日韩性交网站，該工藝是可行的；(2)本實(shí)驗(yàn)所采取的低溫低速欧洲老妇人与异性性交、大輥徑大道次壓下量軋制工藝加上軋輥孔型的優(yōu)化設(shè)計(jì)與配置黄色视频240版，可以使加工變形滲透到鑄坯的中心，這一點(diǎn)是實(shí)現(xiàn)小壓縮比熱連軋生產(chǎn)工藝的關(guān)鍵国产999精品自拍；(3)西寧特鋼在紅送過程中雖然鑄坯余熱未能得到充分的利用97免费无码无码人妻视频，但是有效地避開了A1N、硫化物的析出及夾雜物偏析的敏感溫度區(qū)717电影网琪琪午夜理论，為保證最終軋材良好的表面質(zhì)量創(chuàng)造了有利的條件欧美特黄一级AAAAA片；(4)小壓縮比熱連軋生產(chǎn)與鑄坯質(zhì)量控制，熱送過程控制以及軋后冷卻控制密不可分欧美老妇网站。