The addition of traces of Al could make the materials containing C ranged from 2.6-3.0 % obtain troostite matrix both in sand molds and in metal sand the materials have good synthetic properties .

用砂型和金属型铸造时，加入微量铝可使含碳量在2.6～3.0%的中碳铸态材质得到 屈 氏 体基体，并有较好的综合性能。

The results show that the microstructure transforms from temper martensite to temper troostite when the temper temperature is from 300 ℃ to 630 ℃ and the peak of secondary hardening appears at about 520 ℃ .

结果表明： H13 钢在300℃～630℃温度范围内回火，显微组织经历了由回火马氏体组织向回火 托 氏体组织的转变过程，在520℃左右出现二次硬化峰。

Troostite High Chromium Multi-Element Alloy Cast Iron Grinding Balls of Mine Use

矿山用 屈 氏 体高铬多元合金铸铁磨球

The mechanical properties testing microstructure observation and fractographic features analysis of the troostite high chromium cast iron blade were carried out .

对 屈 氏 体高铬铸铁叶片进行力学性能测试、显微组织观察和断口形貌分析。

The Cr / C ratio and Si must be controlled strictly to produce Cr-V-Ti troostite grinding ball .

生产铬钒钛 屈 氏 体磨球要严格控制Cr/C比和元素 Si。

Metallographic observation shows that after creep the organization and distribution were not changed the organization is still the tempered troostite with needle-like morphology of martensite .

金相观察显示经过蠕变后组织的宏观形貌和分布状态没有发生改变，仍然呈现蠕变 之前的回火 屈 氏 体 组织 状态。

The result proves that the accumulate line is caused by heat treatment defect soft troostite tape .

结果表明， 活塞杆在 磁粉 探伤 中 显现 的 螺旋 形 磁粉堆积线是由热处理缺陷一 屈 氏体软带造成的。

In this paper plastic variation is considered and the stress-strain fields beside the holes are analyzed by means of the elastic and plastic analysis of finite element for two WOL specimens of 40 CrNi steel of troostite and sorbite micro-structures .

考虑了塑性变形的存在情形，对 回火 屈 氏 体 和 回火索氏体两种材料试样的孔边前方应力应变场进行了弹塑性有限元分析。

The technology not only guarantees that there are good microstructures of the tempered troostite and sorbite in the wire rod steel but also makes environmental pollution and human harm decrease much .

该工艺在保证盘条钢具有良好的回火 屈 氏 体和索氏体组织外，还减少了对环境的污染和对人体的危害。

The bright layer is copper solid solution with a small amount of ferrite the black layer is troostite .

渗层中白色 组织为 溶解少量铁的铜固溶 体，黑色 组织为 屈 氏 体。

The microstructure of non-full transformation area is the mixture of residual pearlite and troostite - type pearlite and the hardness is largely lower than that of full transformation area .

不完全相变区是残余珠光体与 托 氏 体型珠光体的混合组织，其硬度较完全相变区显著下降。

Effect of Formation of Granular Pearlite on Wear Resistance of Troostite Classifier Blade

粒状珠光体形成对 屈 氏 体分级机叶片耐磨性的影响

Abstract The paper describes the chemical composition design metallographic structure and mechanical properties of troostite high chromium multi-element alloy cast iron grinding balls of mine use which are produced with the metal-sand composite casting technology .

本文介绍了采用金属&砂复合型铸造的矿山用 屈 氏 体高铭多元合金铸铁磨球的化学成分设计、金相组织及力学性能等特点。

Cr - troostite Grinding Ball Formed in Metal Mould

金属型铸造铬 屈 氏 体磨球

And in its transition zone the hardness is reduced owing to the troostite precipitated .

过渡区由于 屈 氏 体的析出，硬度明显下降。