But lots of statistical comparison under the approximately identical technological conditions indicates that the grade of carbide network rises when the total content of carbon and chrome increases, which followings approximately the rule that if the total content of carbon and chrome increases 0.02%, the grade of carbide network will increases 0.07. According above stated, the content of carbon and chrome should be controlled at the lower limit of critical field.③ That GCr15 bearing steel is rapidly quenched after it has been rolled, on the one hand inhibit recrystal grain coarsening, on the other hand reserve intracrystalline defect caused by roll forming, which lead to finer grains and more dispersed carbide and improve the grade of carbon network before annealing treatment. Meanwhile, such structure makes a large number of point particles retain during the annealing treatment. The particles are existing core of spheroidization, that's to say which takes advantage of carbide spheroidization. It is the real reason that our subject can gain success.④ The present sampling taking rule is between splat cooling area and non splat cooling area, which is an important reason that the examination result is not stable.
因此，实际生产中应尽量将碳含量和铬含量控制在标准范围的下限；③轧后经高压水湍流急冷至800℃左右，一方面抑制了再结晶晶粒长大，同时保留了轧制变形引起的晶内缺陷，使碳化物分布比较弥散、均匀，改善了退火前的碳化物网状级别；同时，这样的组织使得在退火加热过程中遗留了大量碳化物质点，在球化时成为现成的核心，有利于碳化物的球化；④按目前的取样规则取样，正好介于急冷段与非急冷段之间，检验结果往往无法真实代表GCr15钢材的网状碳化物级别。
Novel ledeburite cast die steel with granular carbide was fabricated to increase the strength and toughness of conventional ledeburite cast die steel with network carbide.
研制了含粒状碳化物的新型莱氏体型铸造模具钢，发现其可使传统莱氏体型铸造模具钢的低强韧性得以提高，并探讨了其磨损机理。
But it is brittle at room temperature because of its big grains and carbide network in the grain boundary coming from its slow cool-speed.
但是由于冷速较低，结果晶粒粗大，晶界形成了粗大的碳化物网络，使得它在室温下为脆性，其延伸率几乎为零，机加工性能极差。
Application Discuss Based on Elman Developmental Neural Network in Calcium Carbide Furnace Control System
改进型Elman神经网络在电石炉控制系统中的应用
In order to detect the carbide network in high carbon hypereutectoid steel wire rods accurately, two kinds of detection method of the carbide network are compared.
为了准确地检验高碳过共析钢盘条中的网状渗碳体，分别对选用硝酸酒精溶液侵蚀和碱性苦味酸钠水溶液热侵蚀两种显示方法进行了比较。
The experimental results show that by combining rare earth modification with heat treatment the eutectic carbide network changes into carbide piece and precipitation of granular carbide are accelerated as a result deferring crack forming time and reduce crack propagation speed and increase the impact fatigue resistance effectively.
结果表明：稀土与热处理复合作用，可加速网状共晶碳化物向孤立块状的转变，促进粒状碳化物的析出，有效地推迟裂纹产生的时间，降低裂纹扩展速率，提高其冲击疲劳抗力。
Keywords cold-working die steel; heat treatment; network carbide; cycling spheroidal annealing
冷作模具钢；热处理；网状碳化物；循环球化退火
Investigation showed that adopting low content of boron or phosphorus the morphology of carbide of low chromium white iron could be improved by heat treatment with its sharp ends blunted and its network broken.
研究表明，低铬白口铸铁在含硼或磷较低的条件下，热处理能使碳化物的尖角变钝变圆、网络破断；
The carbon potential which is higher than the balance carbon principle is not easy to come into being network carbide.
渗碳后的表层随碳势的不同而有不同的含碳量，高于定比碳一定浓度的碳势不会在表面形成网状碳化物。
To break down the eutectic carbide network of A-cast structure with grain size 4-5 grade, tensile strain of 60% is needed.
当铸志晶粒度力4～5级寸，破碎晶炭化物组织需要有60%以上的拉应变。
News of the new network in one week, by the Ministry under the auspices of the Ministry of carbide test the revised " Regulations carbide " to seek the views of the work is over.
中化新网讯再过一周，由工信部部碳化物检定所主持修订的《碳化物管理条例》的意见征求工作就结束了。
Both the thermodynamic calculation and experiments showed that the main reason for inhibition of network carbide of forged UHCS was that the quantity of proeutectoid carbide decreased with the addition of Al.
热力学计算与试验均表明：超高碳钢中添加铝使先共析碳化物数量降低是锻造空冷后网状碳化物形成受到有效抑制的根本原因。
K and Na modification, eutectics carbide turns into nodular from network form, carbide is fined and is even distributed.
钨合金铸铁经K、Na变质处理后，共晶碳化物由网状分布变成团球状分布，碳化物明显细化和分布均匀化。
To break down the eutectic carbide network of A-cast structure with grain size 4-5 grade, tensile strain of 60 % is needed.
当铸志晶粒度力4～5级寸，破碎晶炭化物组织需要有60%以上的拉应变。
News of the new network in one week, by the Ministry under the auspices of the Ministry of carbide test the revised " Regulations carbide " to seek the views of the work is over.
中化新网讯再过一周，由工信部部碳化物检定所主持修订的《碳化物管理条例》的意见征求工作就结束了。