韧性钢

For diameter 26mm axle bar of CK45 steel,when surface hardness is 54～ 62HRC,core maximum hardness is 32HRC and case depth is 3.8～5.3mm,it has an optim um combination of strength and ductility .

对φ26mm CK45钢轴杆，当表面硬度为54～62HRC，硬化层深度为3.8～5.3mm，心部硬度＜32HRC时，轴杆具有最佳的强韧性，获得了较高的静扭强度和扭转疲劳寿命。

Measures of improving for low temperature toughness by selecting the welding materials and strictly controlling the welding process for welded joints of low temperature low-alloy steel, nickel alloy steel and chrome-nickel austenitic stainless steel for low temperature pressure vessels were summed up.

为了改善工作于低温环境的压力容器用低合金低温钢、镍合金钢和铬镍奥氏体不锈钢的焊接接头低温韧性，而采取改进焊接材料、严格控制焊接工艺的措施。

The effect of granular bainite on impact toughness of CGHAZ of Ultra-low carbon copper-bearing age hardening steel was studied.

研究了粒状贝氏体对超低碳含铜时效钢粗晶热影响区冲击韧性的影响。

The result showed that the quantity and dimension of M-A islands in granular bainite has a great effect on impact toughness of CGHAZ of ultra-low carbon copper-bearing age hardening steel.

结果表明，粒状贝氏体中M A岛的含量和尺寸对超低碳含铜时效钢CGHAZ的冲击韧性有显著影响。

Granular bainite ; copper-bearing age-hardening steel ; coarse-grained heat affect zone ; impact toughness

粒状贝氏体；含铜时效钢；粗晶热影响区；冲击韧性

In view of the improper matching of the strength-toughness for domestic petroleum drill pipe sub,the influence of the chemical compositions and metallurgical quality of 37CrMoE steel used for drill pipe sub on its mechanical properties,as well as the effect of the metallurgical quality on the hardenability,were analyzed.

针对国产石油钻杆接头存在强韧性配合不良的问题，试验研究了钻杆接头用37CrMoE钢的化学成分和冶金质量对其力学性能的影响，以及冶金质量对淬透性的影响。

Then, military economical efficiency of different airport traffic zone is analyzed based on the cost-effect analysis theory. The conclusion shows that although the investment of steel fibred concrete airport traffic zone is most expensive, its military economical efficiency is most notable.

它显著地提高了混凝土的抗拉、抗弯、抗裂、抗冲击、抗疲劳和韧性、延性、抗磨性能，是具有良好塑性的新型建筑材料[1]。20世纪70年代以来，美、日、英、法、德等发达国家已将钢纤维混凝土应用于机场道面和公路路面。

How to improve the impact toughness of quenched and tempered steel forgings is an important thesis with operation significance.

提高调质钢锻件的冲击韧性是一个极具现实意义的课题。

In this paper, the new IGF refined hot-forged and non-hardened-tempered steel with high strength and toughness was designed and its capability was studied.

研制了新型晶内析出铁素体细化微合金高强韧性非调质钢，并对其组织性能进行了系统的研究。

Compared with original cast 3Cr2MoNiWV hot-work die steel, the impact toughness and UTS at both room and high temperature of modified one can be increased by 1.9 times, 234 MPa and 179 MPa respectively, with same hardness.

与常规的铸造3Cr2MoNiWV热锻模具钢相比，冲击韧性提高1.9倍，达到了72.3J／cm^2，常温抗拉强度和高温抗拉强度（600℃）分别提高了212MPa和206MPa，达到1446MPa和104

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。