回火

In many reasons resulted in steel brittleness,the amphiprotic temper brittleness is a predominant influencing factor.

在导致钢脆性的诸多因素中，二类回火脆性是比较突出的一个影响因素。

Quenched and tempered steel ; impact toughness ; amphiprotic temper brittleness ; brittleness transition temperature

调质钢；冲击韧性；二类回火脆性；脆性转变温度

Preventionof back-flow of air prevents the hydrogen fuel system from backfiring,which is another common problem of hydrogen fuel systems.

防止回流的空气，防止氢燃料系统从回火，这是另一个常见的问题，氢燃料系统。

"No, we got wind of a nasty backfiring jinx down in Elephant and Castle, but luckily the Magical Law Enforcement Squad had sorted it out by the time we got there..."

&不是，我们得到情报，说大象城堡那儿有人施了一个危险的回火咒，幸好，等我们赶到那儿的时候，魔法法律执行队已经把事情解决了……&

"Fuel-system troubles usually show up in engine operation, causing such troubles as poor acceleration, missing, loss of power, failure to start, Backfiring, stalling, and so on."

燃料系统的故障通常表现在发动机的运转上，故障表现为加速不力、失速、动力中断、起动失败、回火、停车等。

Surface morphology, microstructure and wear morphology of the coatings were investigated using model KYKY-2800 scanning electron microscope modeled. Phases of the coatings were analyzed using model D/max-RA X-ray diffractometer. Microhardness of the coatings was tested using model MH-6 hardness-testing device. The wear-resisting property of coatings was compared with 65Mn steel treated by the quenching and backfiring technology using the home-made abrasion machine. The feasibility was analyzed for reactive electric-spark build-up welding TiN cermet coating to be used for gear shaft restoration.

采用KYKY-2800型扫描电镜观察了堆焊层表面形貌、显微组织和磨损形貌，采用D/max-RA型X 射线衍射仪分析了堆焊层物相，采用MH-6型显微硬度计测定了堆焊层显微硬度，采用自制磨损实验机对比了堆焊层与淬火回火65 Mn钢的磨损性能，分析了电火花堆焊TiN金属陶瓷层用于轴颈修复的可行性。

The study shows the influence of the existence of chromic carbide on the impact toughness of this material.

研究表明，不同回火温度下该材料的碳化铬析出相的数量存在差异，从而导致冲击韧度的起伏。

DSC and dilatometry were carried out to determine the phase transformation temperature of a high speed steel used for centrifugal cast rolls.

采用差式扫描量热法及热膨胀法测定了离心铸造轧辊用高速钢的相变点，根据高速钢的临界转变温度，进行了退火、淬火和回火实验。

The effects of high temperature tempering on the microstructure and mechanical property of an ultra-low carbon bainitic steel have been investigated by means of transmission electron microscopy, scanning electron microscopy, micro-hardness measurements and dilatometry.

本研究以穿透式电子显微镜、扫描式电子显微镜、微硬度量测及热膨胀仪分析超低碳变韧铁合金钢高温回火之显微结构及机械性质变化的特性。

Air injection system anti-backfire or diverter valve inoperative.

空气喷射系统的防回火装置或分流阀失灵

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。