断面收缩率

当Zr含量增加到3%时，合金的室温拉伸性能达到较好匹配。在保持强度的同时，伸长率相对提高了25%，断面收缩率相对提高了24%。

When Zr content is increased to 3 % , the strength and ductility can match preferably , while the strength maintains the same level of that alloy with 2 % Zr content , the elongation and reduction of area are increased by 25 % and 24 % respectively .

试验结果表明，中碳Cr-Ni-Mo钢的脆性区（断面收缩率≤60%）为910～700℃，其塑性区为1320～910℃。

The test results showed that brittle region ( reduction of area ≤ 60 % ) of the medium carbon Cr-Ni-Mo steel was 910 ~ 700 ℃ and its plastic region was 1 320 ~ 910 ℃ .

Z向断面收缩率与塑性夹杂物级别的关系

Dependence of Z-direction Section Shrinkage on Plastic Inclusion Level

光束钎焊对接接头的断裂强度σb、相对延伸率δ、断面收缩率ψ均低于被钎焊母材。

The breaking strength σ b , relative elongation δ and fracture surface shrinkage ψ of butt joint by light beam brazing are lower than those of brazed base material .

随着冷热循环次数的增加，含氢TC4钛合金抗拉强度上升，断面收缩率和冲击韧性下降。

With the increase of the thermal cycling , ultimate tensile strength of the TC4 containing hydrogen increases , and the reduction of section area and impact strength decreases .

在所研究的电位区间，总体趋势是随电位正向增加，断面收缩率、断裂时间和延伸率增加，而断口部位SCC裂纹平均扩展速率减少、即SCC敏感性降低。

The general tendency in the studied potential range was that with positive increasing of potential , reduction in area , fracture time and elongation of specimens increased , crack growth rate of SCC and the susceptibility to SCC decreased .

结果发现：相同应变量所导致的电阻增量随Zn含量的增加而增加，在大应变量情况下（断面收缩率为60%～86%），应变电阻增量与Zn含量基本成正比关系。

The results show that the strain resistivity increases with the increases of Zn content for the same cold deformation value . At a large deformation value ( section shrinkage up to 60 % ~ 85 % ), the resistivity increment is proportional to Zn content on the whole .

中碳Cr-Ni-Mo合金钢用50kg真空感应炉冶炼，并通过Gleeble-3800试验机测定了该试验钢在600～1400℃的力学性能-最大力值（载荷）和断面收缩率。

The medium carbon alloy steel Cr-Ni-Mo was melted by a 50 kg vacuum induction furnace , and the mechanical properties of test steel-maximum load and reduction of area at 600 ~ 1 400 ℃ have been measured by Gleeble-3800 test machine .

随着PTWs含量的增加，Ni-P-PTWs复合镀试样的抗拉强度和弹性模量降低，而最大延伸率、断面收缩率和拉伸断口侧面的裂纹密度增加。

And the tensile strength and elasticity modulus would decrease with the increase of the PTWs content , while the elongation , area reduction and the crack density of the fracture side of Ni-P-PTWs composite coatings samples increased .

大断面收缩率楔横轧稳定轧制问题分析

Analysis on rolling stability of heavy section shrinkage cross wedge rolling

45钢断面收缩率初探

Preliminary study on ratio of area contraction of 45 steel

圆形钢丝断面收缩率的快速计算法

Method for Quick Calculating Reduction of Area for Round Wire

楔横轧一次楔大断面收缩率成形机理

Forming principle of heavy section shrinkage cross wedge rolling by single wedge

塑性指标断后延伸率和断面收缩率有所下降。

The plasticity index of elongation and the reduction of area continue to fall .

大断面收缩率一次楔入轧件心部缺陷的实验研究

Experimental study on internal defect of heavy section shrinkage workpiece under one cross wedge rolling

延伸率和断面收缩率也有所提高。

Elongation and contraction rate increases .

汽车减震弹簧用油淬火回火钢丝断面收缩率分析

Research of Percentage of Area Reduction of Quench & Temper Wire Applied to Auto Damping Spring

试验结果表明，循环加热淬火能够提高强度、断面收缩率和疲劳寿命。

The experimental results show that cycle quenching treatment increases tensile strength , reduction of cross - sectional area and fatigue life .

为了成形大断面收缩率轴类零件，进行了楔横轧二次楔入试验。

For the sake of the axis accessory 's figuration , the experiment of second wedge heavy section shrinkage was carried out .

结果表明，稀土氧化物能提高熔敷金属的伸长率和断面收缩率；

The experimental results show that the elongation and area reduction of weld can improved by adding RE oxide in electrode coating material .

通过绘制变形温度与断面收缩率的关系曲线，找出了该钢的低塑性温度区，即裂纹敏感点。

The area of inductile , namely crack-sensitive spot , is found by the curve of hot ductility temperature and cross section shrinkage ratio .

利用本试验设备制备的单晶铜铸棒的伸长率和断面收缩率分别比定向凝固多晶铜的伸长率和断面收缩率提高了85.85%和34.79%；

The elongation and reduction of cross-section of single-crystal copper ingots produced by this apparatus are higher 85.85 % and 34.79 % than polycrystal copper ;

总结了在不同的工艺参数（展宽角、成形角、断面收缩率）时，工件相关的变量的变化规律。

Summarizes the laws of the variation related to workpiece quality in the different process parameters ( broadening angle , forming angle to the section shrinkage ) .

该研究拓宽了楔横轧加工界限，对大断面收缩率产品的开发有重要意义。

This study result widens the processing limit of cross wedge rolling and is of momentous significance to develop heavy section shrinkage products of cross wedge rolling .

在250℃时，随着Y含量增加合金高温抗拉强度增大，延伸率及断面收缩率降低；

At 250 ℃, the elevated temperature strength of the alloys is increased with the increasing amount of Y addition , but elongation and section reduction are decreased .

当杆的断面收缩率比杯形部分断面收缩率大得较多时，不适合直接用复合挤压成形。

When the shrinkage of the rod fracture surface much more than that of the cup part fracture surface , its formation by compound extrusion is not applicable .

最后给出了该方法在减震器弹簧公差设计中的应用实例。汽车减震弹簧用油淬火回火钢丝断面收缩率分析

In the end , a sample of spring absorber tolerance design is introduced . Research of Percentage of Area Reduction of Quench & Temper Wire Applied to Auto Damping Spring

焊后试件的性能测试结果表明，焊接接头的拉伸强度、断面收缩率、延伸率及冲击韧性均已超过母材。

The results of performance measurement test show that tensile-strength , contraction of cross sectional area , elongation percentage , dynamic ductility of the weld all exceed their base metal .

结果表明，随固溶处理温度提高，奥氏体晶粒尺寸增大，强度降低，延伸率和断面收缩率变化不大。

The results show that with increasing the solution temperature , the austenite grain size increases , and strength decreases , while elongation and reduction of area have the small variation .

试验结果表明，微量锡的存在，使高速钢的断面收缩率，伸长率及冲击韧性明显下降，而对其强度和硬度影响不大。

The results showed that percentage reduction of area , percentage elongation and impact toughness decrease evidently with addition of trace amount of tin , but the strength and hardness increase slightly .