介绍了油孔螺塞拼接式热锻模具的设计及其应用效果。
Finally the design and application achievement of this hot forging die are described.
指出了精铸热锻模具制造中存在的成型问题，并提出了建议。
The problems in cast technologies of hot-forging dies are pointed out and suggestions are presented.
结果表明，精铸热锻模具的使用寿命和稳定性得到了明显提高；
The results show that the life and stability of the die elevates;
在第四章，对理想材料结构热锻模具的制造方法进行可行性研究讨论。
The feasibility study of manufacture method for "Ideal Material Structure Hot Forging Die" is expressed.
研究了稀土复合变质对新型铸造热锻模具钢(CHD钢)组织与性能的影响。
The effects of rare earth (re) complex modification on structure and the properties of a new cast hot-work die (CHD) steel were investigated.
研究结果表明：材质及工艺决定了精铸热锻模具呈现不同的失效形式和寿命。
Results show that different failure modes and lives are dependent on the material composition and subsequent processing.
简述了精铸热锻模具国内外应用状况，对铸造模具钢的研究进展进行了研究。
Research on the stress and strain evolution of aluminum alloy hot forging die;
研究了新型精铸热锻模具钢的高温磨损性能，并与H13钢进行对比探讨高温磨损机理。
The high temperature wear property of a new type precision cast hot-forging die steel was studied, and compared with that of H13 steel. The mechanism of the high temperature wear was discussed.
分析了5crmnmo钢热锻模具的破坏形式，并进行了工艺改进，使模具寿命成倍地增加。
This paper analyses failure way of 5crmnmo heat forging die, improves its technology, and rise its life.
结果表明：h13热锻模具钢经此工艺处理后，具有较高的硬度和热疲劳性能，延长了模具的使用寿命。
The results show that the H13 steel treated by new process has higher hardness and heat-fatigue property. The service life of hot-forge die is prolonged.
提出了通过显示奥氏体实际晶粒度、裂纹形貌和扩展方式来分析热锻模具型腔表层塑性变形行为的试验方法。
This paper advanced a study method that can observe plastic deformation behavior of surface layer of die cavity by showing austenite grain, size, crack morphology and propagation mode.
高温磨损机理为氧化物疲劳剥落磨损，精铸热锻模具钢磨损磨屑为厚大块状，而H13钢磨损磨屑以条状为主。
The high temperature wearing was due to the fatigue delamination of the oxide, the lump wear debris were revealed on the precision cast steel, and the bar wear debris on H13 steel.
与锻造模具钢相比，铸造热锻模具钢虽然韧性低，但强度高、红硬性好，具有较低的缺口敏感性和较高的抗热疲劳性。
Compared with the forging die steel, casting forging die steel although toughness is low, but high strength, red hardness is good, with low notch sensitivity and high resistance to thermal fatigue.
新型铸造热锻模具钢（CHD钢）由于具有较高的强韧性和高温稳定性，使用寿命高于锻造模具，具有广阔应用前景。
The new cast hot work die steel (CHD steel) has high strength and toughness, high thermal stability, high lifetime and wide application prospects.
因其成形温度的特点，对温锻模具冷却有别于热锻成形。
Because of the forming temperatures are different, the cooling of warm molding forging are distinguish from hot forging forming.
气门热精锻模具失效的主要形式是热磨损和压塌。
The main failure mode of the finish hot- forging dies for Valves are the hot wear of col- lapse.
气门热精锻模具失效的主要形式是热磨损和压塌。
The main failure mode of the finish hot- forging dies for Valves are the hot wear of col- lapse.
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