淬斷 的英文怎麼說
中文拼音 [cuìduàn]
淬斷
英文
wetting-off-
Abstract : by means of metallographical examination and sem, the microstructure characteristics, macro - and microfractographs of the brittle broken wheel hull bolt of bj212 automobile have been studied. the results show that the thin - headed screw, with excessively deep carbonitriding layer and hardening layer, has less resistance to brittle fracture in the thin area of its head. at the root of the head connecting the stem, a tensile stress may emerge owing to the non - even quenching stress. those are the two reasons for low torque fracture of bolt
文摘:藉助金相、掃描電鏡等手段對低扭矩脆斷的bj212汽車輪殼螺栓的金相組織特徵，宏觀和微觀斷口形貌等進行了研究，結果表明：這種頭部薄的螺栓，滲層和淬透層過深，使頭部薄區脆斷抗力降低，在頭部與桿的根部，由於淬火應力不均勻導致根部產生拉應力，均是導致螺栓低扭矩斷裂的原因。The results indicated that, the fabrication process of ultra - fine grain material is mainly determined by the stress, rotate speed and the flux of cooling water. the grain refining and the hardening effect are mostly affected by the rotate speed and the flux of cooling water. compared with commercial ly12, the invalidate strength and the prolongation rate of the ultra - fine grain material are properly improved in the measurement of compression property ; and the abrupt change of the dilatability of the ultra - fine grain material at 500c is found ; also the phenomena of which the grain size of these microstructures is stable when annealed under 300c is observed
研究表明，採用本文提出的摩擦壓扭強變形區轉移法可以得到棒狀的超細晶材料，軸向壓力、扭轉速度和溫度是採用該方法制備超細晶材料的主控參數；試件的旋轉轉速和冷卻速度對變形區晶粒細化和硬化效果影響顯著；超細晶ly12的壓縮性能與淬火+自然時效狀態的ly12壓縮性能相比，斷裂強度和延伸率均有一定程度的增強；超細晶ly12的熱膨脹系數在550左右發生明顯的變化。Meanwhile, the fracture was accelerated due to the uneven surface hardness and the unreasonable distribution of the hardening layer on the crankshaft, and the bad lubrication condition in service
同時軸左頸表面硬度不均勻、淬硬層分佈不甚合理，工作過程中潤滑條件差，加速了曲軸的斷裂。The network carbide and acicular martensites that existed in the microstructure of the root grooves of the spline due to improper carburating and quenching process of the shafts, led to the initiation and propagation of the intergranular microcracks and were the main reason that caused the early fracture of the shafts
由於滲碳淬火工藝不當，在二軸花鍵槽根部的組織中產生了網狀破化物和粗大的針狀馬氏體，在外力作用下形成沿晶顯微裂紋並擴展，是導致二軸疲勞斷裂的主要原因。The vc - fe surface composite shows high wear - resistance, it ' s wear - resistance is 4. 20 times as that of chilling respectively. with the content of v increasing, it ' s rigidity and wear - resistance increases continually. more vc grains gained, and well distributed, better wear - resistance the vc - fe surface composite will show. ( 7 ) surface cermet composite was formed by the means of cast - sintering technique, with the help of adding wc grains and the quantity of heat sent out from the reaction v + c vc, the carbide cermet quality percent exceeds 60 %
在重載干滑動摩擦條件下， vc一fe表面復合材料顯示了很高的耐磨性，其相對耐磨性是可淬硬鑄鐵的4 . 2倍:隨著含v量的增加， vc一fe表面復合材料的鑄態硬度和耐磨性不斷提高， vc顆粒越多，分佈越均勻，表面復合材料的耐磨性就愈好。分享友人