高溫、高速下鉻鋼和碳素工具鋼塑性變形阻力研究

A Study of the Resistance to plastic Deformation of Chrome Steel and Carbon Tool Steel at A High Temperture and rate

摘要: 采用凸輪式形變試驗機,在高溫高速下對20Cr、40Cr、T8A,T12A等四種鋼進行壓縮時塑性變形阻力的試驗研究。
試驗范圍:
變形溫度:850～1150℃;
變形速度:5～80秒¹;
變形程度:e_max=1n2。
本文著重分析了變形溫度、變形速度、變形程度對20Cr、40Cr、T8A、T12A等四種鋼塑性變形阻力的影響關系及20Cr與40Cr,T8A與T12A試驗結果的比較。并提供了供工程技術人員和軋鋼生產中可實際使用的塑性變形阻力的計算公式和計算圖表。同時還運用T8A的試驗結果與各國學者的試驗結果進行了比較。

Abstract: A Cam plastometer is adapted. The experimental study of the resistance to plastic deformation of four types of steel (200Cr 40Cr, T8A, Tl2A) has been made during the compression of the specimen under high temperature and high speed.
The experimental range was as follows:temperature 850-1150℃;rate 5-80S^-1; and extent of reduction e_max=lnho/h=ln2.
This paper mainly analyes the influence of the temperature, rate and the extant of the reduction on the resistance to deformation of these four type's of steel, and results of 20Cr and T8A are in compar-sion with 40Cr and Tl2A. In this paper, there are a formula for calculating resistance to deformation and some graphic charts which may be useful for engineers and technicians. The experimatal result of T8A is compared to the other study of some foreign scholars.