The impact toughness of the magnets could be improve with appropriate alloying elements addition during ball milling while there was no visible changes to the fracture behaviour , and the coercivity of magnets with al and ti was significantly enhanced 晶间单独或复合添加适量合金元素对磁体冲击韧性均有一定提高作用,但对断裂模式没有明显影响,复合添加ti 、 al能显著提高磁体矫顽力。
Through the analysis of the service condition , property requirement , alloy element and cost performance of wear resistant material used for lining board of hadifield - steel cone crusher , the several kinds of lining boards with different chemical composition were designed 摘要通过对圆锥破碎机衬板用耐磨材料的使用工况、性能要求、合金元素及耐磨材料性价的分析，设计了不同化学成分的改性高锰钢衬板。
Wetting between reinforcement sicp and the molten metal is often poor when it is blow 1000 ' c ; 2 . during the processing , many phases of the interfacial reaction products have negative influence on the properties of the produced composites Sic颗粒增强复合材料中界面反应生成的有害杂质相较多，对复合材料的性能的影响较大。可以通过添加mg 、 li等活泼的合金元素，对增强体颗粒进行表面预处理来改善润湿性。
It is possible to suppress brittleness and increase the strength and toughness by optimizing heat treatment process especially for microalloyed steels 50crv . in addition , heat processing for microalloyed steels socrv was investigated in principle in the paper 通过微合金元素产生的沉淀强化，可以弥补回火造成的强韧性的下降，设计最佳的热处理综合工艺将可以同时提高钢的强度和韧性，同时还可保持一定的硬度。
It was reported in this paper that in the aes analysis of aluminum alloy ingots by the photoelectric direct reading spectrometer , segregation of alloying elements , especially silicon in the alloy was observed , leading to deviation of analytical results obtained from different site of excitation 摘要在用光电直读光谱仪分析铭合金时，在不同激发点所取得的合金元素的测定结果，特别是硅的刚定值，之间存在明显偏差，并证实系由合金的偏析所引起。
In this paper through variation of the original chemical ingredients of the shaft , which is 20mnsi ， a elementary investigation was made on the mechanical properties of the shaft which be affected by the addition of appropriate quantities of the minor elements such as rare earth , v , ni . the analysis of the microstructure and the photomicrography of the effects under the quantities of minor elements are precisely available by means of the sem energy analysis the mechanical properties of the new steel are tested under the normal situation 本文是在20mnsi锚杆原始材质的基础上加入适量的复合稀土、钒和镍等微合金元素。通过改变锚杆原始材料的化学成分的配方进行了大量的实验研究。利用扫描电镜、能谱分析等对所得新材质的组织、形貌以及稀土、镍、钒成分对它们的影响进行了分析。
The following results are achieved : ( 1 ) in accordance with the empirical electron theory of solids and molecules , considering the number of covalent bond pairs on the strongest bond in a segregation structure na , the elements for matrix - strengthening can be chosen . ( 2 ) on the basis of the available phase - equilibrium thermodynamics calculation of alloy system and phase diagrams , which have been worked out , the contents of alloy elements can be identified with reference to the types , quantity and phase - transformation of carbides . ( 3 ) both the values relating to toughness ( including bending strength , yield strength , impact value of unnotched samples ) and hardness of new dm9 die steel are higher than those of crl2mov die steel 结果得出： ( 1 )根据固体与分子经验电子理论，利用偏聚结构单元的最强共价键上的共用电子对数n _ a ，可以选择工模具钢基体相的强化元素； ( 2 )根据合金系相平衡热力学计算及已有的相图，可以碳化物类型、数量及其相变确定合金元素含量； ( 3 )新型dm9钢在强韧性(抗弯强度、屈服强度、无缺口冲击值)和硬度方面均高于cr12mov钢； ( 4 )以dm9钢与6crw2si 、 7cr2wmovsi ( dm7 ) 、 h13和cr12mov四种模具钢的实验比较，进一步验证了上述冷作模具钢合金设计方案是合适的。
That the alloying element mn and ti substitutes the atom of fe in the rich iron - phase ( al , si , fe ) and resumes the part of the element si in primary phase refines the second phase . at the same time , the volume percentage of second phase is increased . at the course of solidification , the alternating current field changes obviously the microstructure morphology of the al - 20si - 5fe - x alloy and the number of particle eutectic structure is increased 合金元素mn 、 ti通过占据富铁相( al , si , fe )中铁原子的晶格位置，同时消耗部分初生相中的si元素，形成四元富铁相( al , si , fe , mn ) ，细化了合金中的第二相，同时提高第二相体积百分数。
Based on the analyses on mechanical properties , microstructure and fracture of - the microalloyed steels socrv with various heat treatment technique , it can be affirmed that various fractures arttribute to various mechanism , we can draw conclusion that the strength and toughness of microalloyed steels 50crv will be increase simultaneously by optimal heat treatment technique . to illustrate the mechanism of the strength and toughness of microalloyed steels socrv , we designed the comparative experiment and observed the microstructure of the sample which occurred at different quench and tempering temperature and different tempering time . the last experiment results were determined by the four factors : fined microalloyed elements grains , the decompound of martensite , martensite transformation of remnant austenite and the second phase precipitation 为解释微合金化50crv钢强韧化机理，本文通过对不同淬火温度，回火温度，回火时间下的力学性能指标的对比及显微分析，认为微合金元素的细化晶粒，马氏体的回火分解，残余奥氏体的转变，第二相的沉淀析出共同决定了微合金钢的强韧化情况，特别是由于微合金元素的存在，其细化晶粒及其碳氮化物的沉淀析出，导致钢的良好的强韧性，并且如果工艺满足第二相的沉淀析出强化大于回火马氏体分解引起的软化效应，会在硬度曲线中产生明显的二次硬化现象。
Mixing alloy elements of ni , mo , w in fe - c - cu alloy , the sintered steel was prepared . the microstructure and wear resistance properties of the sintered steel had been studied . the influence of heat - treated technology and the alloy elements on the microstructure and the wear resistance had been studied and analyzed 以fe - c - cu合金为基粉，添加合金元素ni 、 mo 、 w制备烧结钢，并对试样进行了微观组织和耐磨性分析，系统地研究了热处理工艺及合金元素镍、钼、钨的复合添加对烧结钢组织和耐磨性的影响。
