表面脱碳

结果表明，螺栓的螺纹根部表面脱碳，螺纹表面塑性变形层中存在微裂纹，表面脱碳和微裂纹严重降低了螺栓的强度，导致螺栓断裂失效。

Result indicates that surface decarburization in thread root of bolt and microcrack in plastic deformation layer of thread surface are the main causes to reduce seriously the strength of bolt and result the bolt rupture failture .

结果表明，保护涂层对减少GCr15钢表面脱碳层有明显效果。

After annealing , decarbonization layer was examined with microscope , and the results show that the protective coating can reduce the depth of decarburization layer effectively .

分别采用VN、Fe-V合金在实验室冶炼了不同钒含量的Si-Mn系弹簧钢，并系统研究了其淬透性、抗回火稳定性、表面脱碳敏感性和力学性能的变化情况。

A series of experimental Si-Mn series spring steel which has different vanadium content was smelt in laboratory by Fe-V or VN alloying . The penetration hardenability , temper resistance , surface decarbonization and mechanical properties of the test steel were studied .

钢管表面脱碳层对钛-钢双金属管扩散复合界面的影响

Effect of Decarburized Surface Layer on Diffusion Compound Interface in Titanium-Steel Bimetallic Tube

对线材表面脱碳层深度变化规律的研究

Research on change law of depth of decarburization layer on surface of wire bar

含硅中碳钢热轧过程中表面脱碳的控制

The control of surface decarbonization in the hot roll process for Si-bearing medium carbon steel

缝纫机针用钢丝组织转变和表面脱碳机理探讨

Inquiring into Mechanism of Microstructure Transformation and Surface Decarbonization of Steel Wire for Sartorius Needle

结果表明，弹簧钢轧前加热和轧后冷却过程均会导致表面脱碳。

The results show that decarburization occurs both in the heating process prior to rolling and cooling process after rolling .

根据邢钢线材表面脱碳层深度统计数据的变化规律，对脱碳层深度的变化情况进行了研究。

The change law of depth of decarburization layer on surface of wire bar is researched based the statistics data .

详细介绍了一种根治陶瓷型铸件表面脱碳的方法并分析其原理。

The technique by which surface decarbonization of Shaw process castings can be completely eradicated was introduced in detail , and the theory is discussed .

降低加热温度和炉内残氧量、缩短在炉时间、提高轧后两相区冷却速度可明显降低钢的表面脱碳。

Reducing heating temperature and residual oxygen percentage in the furnace , shortening time in the furnace , increasing cooling rate of γ′ + α duplex-phase range after rolling can reduce the ferrite decarburization .

碳原子向晶界扩散引起界面附近钢侧柱状晶区，铁原子向钛中扩散引起界面附近钛侧无晶界区与针状马氏体区，钢表面脱碳加速这一过程的进行。

Columnar crystal areas are generated near the interface by carboatomic diffusing in to grain boundary , and acicular martensitic areas are generated near the interface by Fe atoms diffusing to Ti , and decarburation on steel surface promotes the process .

研究了在异种金属热膨胀差引起的内压力作用下，钛管与低碳钢管扩散复合界面的成分、组织、结合强度及钢管表面脱碳层的影响。

Composition , microstructure and bond strength of Ti-steel tube compound interface were conducted to study inner stress caused by the difference of thermal expansion between two different metals , as well as the effect of decarburized layer on steel tube surface .

弹簧表面形成脱碳层将恶化其疲劳性能，因此要求弹簧钢具有低的脱碳敏感性。研究了不同硼含量（0·0006%~0·0027%）对中碳高强度弹簧钢脱碳敏感性的影响。

The effect of boron content on decarburization sensitivity of medium carbon high strength spring steel was investigated .

认为吊卡锁舌断裂原因是断裂部位表面存在的脱碳层，降低了钢的强韧性，在使用过程中产生了疲劳裂纹。

Find that the main course is the fatigue crackle are formed during its using time because of there were decarburations on the surface of the fracture and induce the obdurability of steel .

分析了化学成分、硬度、显微组织、剩余疲劳寿命，认为断裂是因组织不合格、表面缺陷、脱碳造成的。

An analysis of chemical composition , hardness , microstructure and residual fatigue life of the spring was carried out . Regarded improper microstructure 、 surface defect and surface decarburization as reason of fracture .

试验表明：熔模精密铸造型壳采用冷型浇注，可防止碳钢及低合金钢铸件的表面的氧化脱碳，有利于提高铸件的表面硬度；

The results show that pouring in the cold shell mold has the advantage of preventing decarburization at the surface of both plain and low alloy carbon steels , and therefore the positive effect of increasing the surface hardness of castings .

详尽地论述了非金属夹杂物的变形率、数量、尺寸、形状和分布以及表面缺陷、脱碳和表面处理对高强度弹簧钢疲劳性能的影响。

The effect of the deformability , amount , size , shape and distribution of non-metallic inclusion , as well as spring surface defects , decarburization and surface treatment on fatigue property of high strength spring steel is reviewed in detail in this paper .

介绍国内外冷镦钢的生产概况，从化学成分、表面质量、脱碳、非金属夹杂、金相组织、冷镦性能等方面指出冷镦钢生产的技术要求以及主要生产工艺。

To introduce general production situation of cold heading steel at home and abroad . Technology requirement and main production process of cold heading steel are pointed out from such aspects as chemical component , surface quality , decarbonization , nonmetal inclusion , microstructure , cold heading property .

通过控制炉内气氛可以改善钢丝表面的氧化、脱碳状况，并避免钢丝在铅浴淬火过程中的挂铅，且可改善酸洗效果。

By controlling atmosphere in the furnace , the oxidization and decarbonization on steel wire can be reduced , and adhering lead in the course of patenting can be avoided and acid picking effect can be improved .